Exploring the contents of HEASARC catalogs using Python#
Learning Goals#
This notebook will teach you:
How to retrieve and explore a HEASARC catalog’s column names, descriptions, and units.
How to retrieve the entire contents of a HEASARC catalog.
How to retrieve a subset of a HEASARC catalog with easy-to-use Astroquery features.
Introduction#
This bite-sized tutorial will show you how to retrieve and explore the contents of HEASARC catalogs in Python.
To learn how to use Python to search for a particular HEASARC catalog, please see the ‘Find specific HEASARC catalogs using Python’ tutorial.
Runtime#
As of 16th March 2026, this notebook takes ~30 s to run to completion on Fornax using the ‘small’ server with 8GB RAM/ 2 cores.
Imports#
This notebook uses features from an Astroquery pre-release. You will need to install the latest version using the command below. We will remove this once Astroquery v0.4.12 is officially released.
%pip install --pre astroquery --upgrade
from astroquery.heasarc import Heasarc
1. Listing a HEASARC catalog’s columns#
For this demonstration, we’re assuming that you already have a HEASARC-hosted catalog in mind; if not, you might find the ‘Find specific HEASARC catalogs using Python’ tutorial useful.
We will use the Archive of Chandra Cluster Entropy Profile Tables (ACCEPT) catalog (Cavagnolo K. W. et al. 2009) as an example.
The best way to get an idea of a catalog’s contents is to list the column
names and descriptions. We can do this using the Heasarc.list_columns(...)
method, passing the name of the catalog as the first argument.
Each HEASARC catalog has a subset of ‘standard’ columns that will be returned by default, which is why the table below contains only a few column names, descriptions, and units even though this catalog has 79 columns:
# We pass the name of the catalog as the first argument
Heasarc.list_columns("acceptcat")
Table length=11
| name | description | unit |
|---|---|---|
| str15 | str80 | str6 |
| name | Cluster Designation | |
| ra | Right Ascension | degree |
| dec | Declination | degree |
| redshift | Redshift | |
| kt | Average Cluster Temperature | keV |
| fit_method_1 | Method of T_X Interpolation in Inner Region: flat or extr (Linear Extrapolation) | |
| num_radial_bins | Number of Radial Bins in Fit | |
| alpha_1 | Best-Fit Power-Law Index | |
| alpha_1_error | Uncertainty in Best-Fit Power-Law Index | |
| dof_1 | Degrees of Freedom in Fit | |
| chi_squared_1 | Chi-Squared of Best-Fit Model |
If, as is likely, you want to examine the full set of columns, you can pass the
full=True argument:
# Pass an additional argument to ensure all columns are returned
all_accept_cols = Heasarc.list_columns("acceptcat", full=True)
all_accept_cols
Table length=79
| name | description | unit |
|---|---|---|
| str23 | str80 | str8 |
| name | Cluster Designation | |
| ra | Right Ascension | degree |
| dec | Declination | degree |
| redshift | Redshift | |
| kt | Average Cluster Temperature | keV |
| fit_method_1 | Method of T_X Interpolation in Inner Region: flat or extr (Linear Extrapolation) | |
| num_radial_bins | Number of Radial Bins in Fit | |
| alpha_1 | Best-Fit Power-Law Index | |
| alpha_1_error | Uncertainty in Best-Fit Power-Law Index | |
| ... | ... | ... |
| center_ccd_obsid_3 | CCD Location of Cluster Center in Chandra Observation 3 | |
| exposure_obsid_6 | Exposure Time for Chandra Observation 6 | s |
| bf_100k_entropy_4_error | Uncertainty in Best-Fit Entropy at 100 kpc | keV.cm^2 |
| p_value_1 | Probability of Worse Fit Given Chi-Squared and DOF | |
| exposure_obsid_2 | Exposure Time for Chandra Observation 2 | s |
| center_ccd_obsid_2 | CCD Location of Cluster Center in Chandra Observation 2 | |
| "__x_ra_dec" | System unit vector column | |
| "__y_ra_dec" | System unit vector column | |
| "__z_ra_dec" | System unit vector column | |
| "__row" | System index column |
If you examine the output of the above cell, you’ll notice that only part of the table has been displayed; this is a common behavior when displaying long tables in Jupyter notebooks, across multiple modules (e.g., Astropy, Pandas, etc.), as ‘printing’ many lines can dramatically affect Jupyter’s performance.
On the other hand, a table like this isn’t going to destroy your computer, so we can
safely sidestep this issue by using the pprint_all() method of the list_columns()
output (an Astropy Table object, more on them in Section 4):
# The 'pprint' stands for 'pretty print'
all_accept_cols.pprint_all()
name description unit
----------------------- -------------------------------------------------------------------------------- --------
name Cluster Designation
ra Right Ascension degree
dec Declination degree
redshift Redshift
kt Average Cluster Temperature keV
fit_method_1 Method of T_X Interpolation in Inner Region: flat or extr (Linear Extrapolation)
num_radial_bins Number of Radial Bins in Fit
alpha_1 Best-Fit Power-Law Index
alpha_1_error Uncertainty in Best-Fit Power-Law Index
dof_1 Degrees of Freedom in Fit
chi_squared_1 Chi-Squared of Best-Fit Model
chi_squared_3 Chi-Squared of Best-Fit Model
exposure_obsid_4 Exposure Time for Chandra Observation 4 s
p_value_4 Probability of Worse Fit Given Chi-Squared and DOF
num_sigma_k0_gt_0_1 Number of Sigma Best-Fit Core Entropy Is Away from Zero
fit_method_4 Method of T_X Interpolation in Inner Region: flat or extr (Linear Extrapolation)
center_ccd_obsid_4 CCD Location of Cluster Center in Chandra Observation 4
alpha_4 Best-Fit Power-Law Index
bf_core_entropy_3_error Uncertainty in Best-Fit Core Entropy, K_0 keV.cm^2
bf_core_entropy_4_error Uncertainty in Best-Fit Core Entropy, K_0 keV.cm^2
dof_2 Degrees of Freedom in Fit
notes Assigned Note(s)
chi_squared_4 Chi-Squared of Best-Fit Model
exposure_obsid_3 Exposure Time for Chandra Observation 3 s
exposure_obsid_5 Exposure Time for Chandra Observation 5 s
bf_core_entropy_3 Best-Fit Core Entropy, K_0 keV.cm^2
obsid_3 Chandra Observation Identifier 3
center_ccd_obsid_6 CCD Location of Cluster Center in Chandra Observation 6
exposure_obsid_7 Exposure Time for Chandra Observation 7 s
bf_100k_entropy_1 Best-Fit Entropy at 100 kpc keV.cm^2
obsid_6 Chandra Observation Identifier 6
p_value_2 Probability of Worse Fit Given Chi-Squared and DOF
alpha_3_error Uncertainty in Best-Fit Power-Law Index
bf_core_entropy_1_error Uncertainty in Best-Fit Core Entropy, K_0 keV.cm^2
bf_core_entropy_4 Best-Fit Core Entropy, K_0 keV.cm^2
dof_4 Degrees of Freedom in Fit
bf_100k_entropy_3 Best-Fit Entropy at 100 kpc keV.cm^2
center_ccd_obsid_1 CCD Location of Cluster Center in Chandra Observation 1
bf_100k_entropy_2 Best-Fit Entropy at 100 kpc keV.cm^2
obsid_7 Chandra Observation Identifier 7
alpha_2 Best-Fit Power-Law Index
alpha_2_error Uncertainty in Best-Fit Power-Law Index
bf_100k_entropy_3_error Uncertainty in Best-Fit Entropy at 100 kpc keV.cm^2
obsid_1 Chandra Observation Identifier 1
max_fit_radius Maximum Radius for Fit Mpc
bf_100k_entropy_1_error Uncertainty in Best-Fit Entropy at 100 kpc keV.cm^2
p_value_3 Probability of Worse Fit Given Chi-Squared and DOF
obsid_5 Chandra Observation Identifier 5
bf_100k_entropy_2_error Uncertainty in Best-Fit Entropy at 100 kpc keV.cm^2
num_sigma_k0_gt_0_2 Number of Sigma Best-Fit Core Entropy Is Away from Zero
fit_method_3 Method of T_X Interpolation in Inner Region: flat or extr (Linear Extrapolation)
dof_3 Degrees of Freedom in Fit
obsid_2 Chandra Observation Identifier 2
alpha_3 Best-Fit Power-Law Index
bf_core_entropy_2_error Uncertainty in Best-Fit Core Entropy, K_0 keV.cm^2
chi_squared_2 Chi-Squared of Best-Fit Model
num_sigma_k0_gt_0_4 Number of Sigma Best-Fit Core Entropy Is Away from Zero
bf_core_entropy_2 Best-Fit Core Entropy, K_0 keV.cm^2
center_ccd_obsid_7 CCD Location of Cluster Center in Chandra Observation 7
bf_core_entropy_1 Best-Fit Core Entropy, K_0 keV.cm^2
bf_100k_entropy_4 Best-Fit Entropy at 100 kpc keV.cm^2
alpha_4_error Uncertainty in Best-Fit Power-Law Index
obsid_4 Chandra Observation Identifier 4
fit_method_2 Method of T_X Interpolation in Inner Region: flat or extr (Linear Extrapolation)
lii Galactic Longitude degree
bii Galactic Latitude degree
num_sigma_k0_gt_0_3 Number of Sigma Best-Fit Core Entropy Is Away from Zero
exposure_obsid_1 Exposure Time for Chandra Observation 1 s
center_ccd_obsid_5 CCD Location of Cluster Center in Chandra Observation 5
center_ccd_obsid_3 CCD Location of Cluster Center in Chandra Observation 3
exposure_obsid_6 Exposure Time for Chandra Observation 6 s
bf_100k_entropy_4_error Uncertainty in Best-Fit Entropy at 100 kpc keV.cm^2
p_value_1 Probability of Worse Fit Given Chi-Squared and DOF
exposure_obsid_2 Exposure Time for Chandra Observation 2 s
center_ccd_obsid_2 CCD Location of Cluster Center in Chandra Observation 2
"__x_ra_dec" System unit vector column
"__y_ra_dec" System unit vector column
"__z_ra_dec" System unit vector column
"__row" System index column
2. Retrieving the entire contents of a HEASARC catalog#
The simplest use case of a HEASARC catalog is that you want to retrieve the entire table.
We can easily fetch an entire catalog using Astroquery’s HEASARC submodule, but before we do, we should check how many rows there are – we want to know what we’re getting into with respect to the size of the table.
We can very easily use the Heasarc.count_rows(...) method to return the number of rows
in our catalog:
accept_nrows = Heasarc.count_rows(catalog="acceptcat")
accept_nrows
np.int64(240)
Note
The Heasarc.count_rows(...) method was added to Astroquery in version 0.4.12.
From the output above, we can see that there are ‘only’ 240 rows in the catalog; combine that information with the number of columns (which we explored in Section 1), and you get a sense of the table’s scale.
As the ACCEPT catalog is quite small (relatively speaking), we can retrieve the whole table without worrying about download time or memory issues.
On the other hand, HEASARC hosts much larger catalogs than ACCEPT. The Chandra Source Catalog 2 (CSC 2; Evans I. N. et al. 2024), for instance:
# Same again, but CSC
Heasarc.count_rows(catalog="csc")
np.int64(407806)
Warning
For large catalogs like the CSC, we do not recommend retrieving the entire table at once.
Finally, now we know that retrieving the entire ACCEPT catalog is reasonable, we can
use the query_region(...) method of Heasarc to do just that. Few arguments are
required:
catalog="acceptcat"- specifies the name of the catalog table to retrieve.spatial="all-sky"- overridesquery_region’s default behavior of searching a catalog around a given coordinate, and instead considers the entire catalog.columns="*"- specifies that all columns should be returned (otherwise you will get a small subset, as discussed in Section 1.
accept_cat = Heasarc.query_region(catalog="acceptcat", spatial="all-sky", columns="*")
accept_cat
Table length=240
| __row | name | obsid_1 | ra | dec | lii | bii | exposure_obsid_1 | center_ccd_obsid_1 | redshift | kt | notes | obsid_2 | exposure_obsid_2 | center_ccd_obsid_2 | obsid_3 | exposure_obsid_3 | center_ccd_obsid_3 | obsid_4 | exposure_obsid_4 | center_ccd_obsid_4 | obsid_5 | exposure_obsid_5 | center_ccd_obsid_5 | obsid_6 | exposure_obsid_6 | center_ccd_obsid_6 | obsid_7 | exposure_obsid_7 | center_ccd_obsid_7 | fit_method_1 | num_radial_bins | max_fit_radius | bf_core_entropy_1 | bf_core_entropy_1_error | num_sigma_k0_gt_0_1 | bf_100k_entropy_1 | bf_100k_entropy_1_error | alpha_1 | alpha_1_error | dof_1 | chi_squared_1 | p_value_1 | fit_method_2 | bf_core_entropy_2 | bf_core_entropy_2_error | num_sigma_k0_gt_0_2 | bf_100k_entropy_2 | bf_100k_entropy_2_error | alpha_2 | alpha_2_error | dof_2 | chi_squared_2 | p_value_2 | fit_method_3 | bf_core_entropy_3 | bf_core_entropy_3_error | num_sigma_k0_gt_0_3 | bf_100k_entropy_3 | bf_100k_entropy_3_error | alpha_3 | alpha_3_error | dof_3 | chi_squared_3 | p_value_3 | fit_method_4 | bf_core_entropy_4 | bf_core_entropy_4_error | num_sigma_k0_gt_0_4 | bf_100k_entropy_4 | bf_100k_entropy_4_error | alpha_4 | alpha_4_error | dof_4 | chi_squared_4 | p_value_4 | __x_ra_dec | __y_ra_dec | __z_ra_dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| deg | deg | deg | deg | s | keV | s | s | s | s | s | s | Mpc | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | ||||||||||||||||||||||||||||||||||||||||||||||||||
| object | object | int32 | float64 | float64 | float64 | float64 | float64 | object | float64 | float64 | object | int32 | float64 | object | int32 | float64 | object | int32 | float64 | object | int32 | float64 | object | int32 | float64 | object | int32 | float64 | object | object | int16 | float64 | float64 | float64 | float64 | float64 | float64 | float64 | float64 | int16 | float64 | object | object | float64 | float64 | float64 | float64 | float64 | float64 | float64 | int16 | float64 | object | object | float64 | float64 | float64 | float64 | float64 | float64 | float64 | int16 | float64 | object | object | float64 | float64 | float64 | float64 | float64 | float64 | float64 | int16 | float64 | object | float64 | float64 | float64 |
| 1 | RX J1539.5-8335 | 8266 | 234.885354 | -83.589953 | 307.565227 | -22.291784 | 8000 | I3 | 0.0728 | 4.29 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 29 | 0.20 | 21.8 | 3.10 | 7.1 | 115.1 | 5.8 | 1.32 | 0.11 | 26 | 13.29 | 9.81e-01 | extr | 0.0 | -- | -- | 135.3 | 4.5 | 0.83 | 0.04 | 27 | 40.39 | 4.71e-02 | flat | 25.9 | 2.90 | 9.1 | 110.0 | 5.8 | 1.41 | 0.12 | 26 | 13.52 | 9.79e-01 | flat | 0.0 | -- | -- | 133.7 | 4.5 | 0.79 | 0.04 | 27 | 54.08 | 1.49e-03 | -0.0913244357272992 | -0.0642187695832523 | -0.993748357016153 | |||||||
| 2 | Abell S0405 | 8272 | 57.886729 | -82.219497 | 296.413320 | -32.475665 | 7900 | I3 | 0.0613 | 4.11 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 34 | 0.20 | 23.5 | 21.00 | 1.1 | 261.1 | 22.1 | 0.52 | 0.10 | 31 | 8.24 | 1.00e+00 | extr | 0.0 | -- | -- | 281.9 | 11.3 | 0.43 | 0.03 | 32 | 9.16 | 1.00e+00 | flat | 16.9 | 27.90 | 0.6 | 274.2 | 27.3 | 0.45 | 0.10 | 31 | 9.79 | 1.00e+00 | flat | 0.0 | -- | -- | 289.3 | 11.2 | 0.40 | 0.02 | 32 | 10.10 | 1.00e+00 | 0.114665363458883 | 0.0719664620044419 | -0.990793965852339 | |||||||
| 3 | Abell 3921 | 4973 | 342.490954 | -64.428381 | 321.953076 | -47.967314 | 29400 | I3 | 0.0927 | 5.69 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 47 | 0.40 | 101.2 | 17.90 | 5.7 | 151.5 | 23.0 | 0.86 | 0.11 | 44 | 7.55 | 1.00e+00 | extr | 0.0 | -- | -- | 272.4 | 6.8 | 0.48 | 0.03 | 45 | 22.08 | 9.98e-01 | flat | 101.2 | 17.90 | 5.7 | 151.5 | 23.0 | 0.86 | 0.11 | 44 | 7.55 | 1.00e+00 | flat | 0.0 | -- | -- | 272.4 | 6.8 | 0.48 | 0.03 | 45 | 22.08 | 9.98e-01 | -0.129861338063087 | 0.411640921482359 | -0.902046442616797 | |||||||
| 4 | Abell 3266 | 899 | 67.805433 | -61.453497 | 272.147700 | -40.152210 | 29800 | I1 | 0.0590 | 9.07 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 15 | 0.08 | 63.7 | 41.90 | 1.5 | 405.3 | 51.6 | 0.71 | 0.27 | 12 | 0.79 | 1.00e+00 | extr | 0.0 | -- | -- | 418.9 | 37.8 | 0.44 | 0.06 | 13 | 2.02 | 1.00e+00 | flat | 72.5 | 49.70 | 1.5 | 376.7 | 48.0 | 0.64 | 0.28 | 12 | 1.26 | 1.00e+00 | flat | 0.0 | -- | -- | 404.6 | 35.2 | 0.39 | 0.05 | 13 | 2.34 | 1.00e+00 | 0.442464632176839 | 0.180517527128831 | -0.878429548496581 | |||||||
| 5 | Abell 3827 | 7920 | 330.471667 | -59.945289 | 332.231736 | -46.376682 | 45600 | S3 | 0.0984 | 8.05 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 67 | 0.60 | 144.6 | 13.40 | 10.8 | 113.1 | 15.2 | 1.23 | 0.10 | 64 | 1651.91 | 6.60e-303 | extr | 0.0 | -- | -- | 287.2 | 7.4 | 0.60 | 0.03 | 65 | 4867.53 | 0.00e+00 | flat | 164.6 | 12.50 | 13.2 | 94.8 | 13.7 | 1.34 | 0.10 | 64 | 1368.56 | 6.59e-244 | flat | 0.0 | -- | -- | 293.5 | 7.3 | 0.57 | 0.03 | 65 | 5896.48 | 0.00e+00 | -0.246834406824482 | 0.435775388415954 | -0.865547564526947 | |||||||
| 6 | Abell 3822 | 8269 | 328.517513 | -57.867419 | 335.580522 | -46.442160 | 8100 | I3 | 0.0759 | 4.89 | e | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 42 | 0.30 | 108.7 | 76.40 | 1.4 | 200.3 | 90.8 | 0.66 | 0.33 | 39 | 3.24 | 1.00e+00 | extr | 0.0 | -- | -- | 322.5 | 16.6 | 0.38 | 0.07 | 40 | 3.95 | 1.00e+00 | flat | 108.7 | 76.40 | 1.4 | 200.3 | 90.8 | 0.66 | 0.33 | 39 | 3.24 | 1.00e+00 | flat | 0.0 | -- | -- | 322.5 | 16.6 | 0.38 | 0.07 | 40 | 3.95 | 1.00e+00 | -0.277768014401118 | 0.453587341772272 | -0.846819610991399 | ||||||
| 7 | Abell 3667 | 5751 | 303.171796 | -56.843250 | 340.847529 | -33.415921 | 128900 | I3 | 0.0556 | 6.51 | 5752 | 60400 | I3 | 5753 | 103600 | I3 | 889 | 50300 | I2 | -- | -- | -- | -- | -- | -- | extr | 56 | 0.30 | 149.3 | 17.20 | 8.7 | 121.9 | 18.6 | 0.72 | 0.09 | 53 | 21.14 | 1.00e+00 | extr | 0.0 | -- | -- | 278.7 | 2.3 | 0.34 | 0.01 | 54 | 44.43 | 8.20e-01 | flat | 160.4 | 15.50 | 10.4 | 110.6 | 16.8 | 0.78 | 0.10 | 53 | 22.84 | 1.00e+00 | flat | 0.0 | -- | -- | 279.5 | 2.3 | 0.33 | 0.01 | 54 | 52.83 | 5.19e-01 | -0.457800069162815 | 0.299254219489207 | -0.837177405806217 | ||||
| 8 | 1E0657 56 | 3184 | 104.623446 | -55.944386 | 266.021486 | -21.250028 | 87500 | I3 | 0.2960 | 11.64 | 5356 | 97200 | I2 | 5361 | 82600 | I3 | -- | -- | -- | -- | -- | -- | -- | -- | extr | 48 | 1.00 | 299.4 | 19.60 | 15.3 | 20.5 | 7.0 | 1.84 | 0.16 | 45 | 42.09 | 5.96e-01 | extr | 0.0 | -- | -- | 277.9 | 14.5 | 0.60 | 0.04 | 46 | 146.18 | 2.31e-12 | flat | 307.5 | 19.30 | 15.9 | 18.6 | 6.5 | 1.88 | 0.17 | 45 | 42.87 | 5.63e-01 | flat | 0.0 | -- | -- | 283.6 | 14.6 | 0.58 | 0.04 | 46 | 157.03 | 4.77e-14 | 0.541856754546199 | -0.141379913860058 | -0.828494404030337 | |||||
| 9 | Abell 3395 | 4944 | 96.701929 | -54.549781 | 263.315160 | -25.265999 | 21900 | I3 | 0.0510 | 5.13 | a,e | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 24 | 0.12 | 213.3 | 26.20 | 8.2 | 133.5 | 30.4 | 1.58 | 0.79 | 21 | 0.00 | 1.00e+00 | extr | 0.0 | -- | -- | 325.5 | 14.4 | 0.23 | 0.05 | 22 | 5.73 | 1.00e+00 | flat | 247.2 | 25.20 | 9.8 | 105.9 | 29.8 | 1.65 | 1.01 | 21 | 0.01 | 1.00e+00 | flat | 0.0 | -- | -- | 332.8 | 14.0 | 0.16 | 0.05 | 22 | 4.49 | 1.00e+00 | 0.576032134193855 | -0.0676878866481252 | -0.814619745879747 | ||||||
| ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... | ... |
| 232 | Abell 665 | 3586 | 127.746775 | 65.838906 | 149.780862 | 34.704110 | 29700 | I3 | 0.1810 | 7.45 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 46 | 0.70 | 134.6 | 23.50 | 5.7 | 106.3 | 25.1 | 1.06 | 0.13 | 43 | 3.79 | 1.00e+00 | extr | 0.0 | -- | -- | 254.8 | 10.1 | 0.61 | 0.04 | 44 | 19.71 | 9.99e-01 | flat | 134.6 | 23.50 | 5.7 | 106.3 | 25.1 | 1.06 | 0.13 | 43 | 3.79 | 1.00e+00 | flat | 0.0 | -- | -- | 254.8 | 10.1 | 0.61 | 0.04 | 44 | 19.71 | 9.99e-01 | 0.323646179067386 | -0.250564509264046 | 0.912398255956438 | |||||||
| 233 | Abell 2218 | 1666 | 248.961796 | 66.211753 | 97.741593 | 38.130431 | 48600 | I0 | 0.1713 | 7.35 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 42 | 0.60 | 288.6 | 20.00 | 14.4 | 10.7 | 7.1 | 2.35 | 0.41 | 39 | 4.83 | 1.00e+00 | extr | 0.0 | -- | -- | 294.5 | 14.7 | 0.41 | 0.05 | 40 | 39.78 | 4.80e-01 | flat | 288.6 | 20.00 | 14.4 | 10.7 | 7.1 | 2.35 | 0.41 | 39 | 4.83 | 1.00e+00 | flat | 0.0 | -- | -- | 294.5 | 14.7 | 0.41 | 0.05 | 40 | 39.78 | 4.80e-01 | -0.376470298518891 | -0.144801496822226 | 0.915042425711038 | |||||||
| 234 | Abell 2125 | 2207 | 235.308975 | 66.265889 | 101.134796 | 42.979315 | 81500 | I3 | 0.2465 | 2.88 | a | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 10 | 0.20 | 225.2 | 32.00 | 7.0 | 32.9 | 41.2 | 1.35 | 1.73 | 7 | 0.06 | 1.00e+00 | extr | 0.0 | -- | -- | 264.5 | 11.5 | 0.10 | 0.05 | 8 | 1.06 | 9.98e-01 | flat | 225.2 | 32.00 | 7.0 | 32.9 | 41.2 | 1.35 | 1.73 | 7 | 0.06 | 1.00e+00 | flat | 0.0 | -- | -- | 264.5 | 11.5 | 0.10 | 0.05 | 8 | 1.06 | 9.98e-01 | -0.330942982823881 | -0.229079098476583 | 0.915423130995054 | ||||||
| 235 | Abell 562 | 6936 | 103.339683 | 69.330886 | 145.935950 | 25.421048 | 51500 | S3 | 0.1100 | 3.04 | e | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 27 | 0.27 | 202.1 | 39.30 | 5.1 | 34.6 | 45.3 | 1.09 | 1.19 | 24 | 1.66 | 1.00e+00 | extr | 0.0 | -- | -- | 244.4 | 9.7 | 0.13 | 0.06 | 25 | 2.41 | 1.00e+00 | flat | 202.1 | 39.30 | 5.1 | 34.6 | 45.3 | 1.09 | 1.19 | 24 | 1.66 | 1.00e+00 | flat | 0.0 | -- | -- | 244.4 | 9.7 | 0.13 | 0.06 | 25 | 2.41 | 1.00e+00 | 0.343447138085492 | -0.0814386698295399 | 0.935634440578841 | ||||||
| 236 | RX J0647.7+7015 | 3196 | 101.958454 | 70.247128 | 144.845228 | 25.114171 | 19300 | I3 | 0.5840 | 9.07 | 3584 | 20000 | I3 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 24 | 0.80 | 225.1 | 47.10 | 4.8 | 48.8 | 31.9 | 1.70 | 0.39 | 21 | 0.42 | 1.00e+00 | extr | 0.0 | -- | -- | 275.6 | 32.0 | 0.71 | 0.10 | 22 | 9.72 | 9.89e-01 | flat | 225.1 | 47.10 | 4.8 | 48.8 | 31.9 | 1.70 | 0.39 | 21 | 0.42 | 1.00e+00 | flat | 0.0 | -- | -- | 275.6 | 32.0 | 0.71 | 0.10 | 22 | 9.72 | 9.89e-01 | 0.330629440642765 | -0.0700269207743348 | 0.941159074411503 | ||||||
| 237 | MS J0735.6+7421 | 4197 | 115.434354 | 74.243953 | 140.648974 | 29.436982 | 45500 | S3 | 0.2160 | 5.55 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 18 | 0.30 | 13.8 | 2.20 | 6.3 | 109.9 | 4.6 | 1.12 | 0.05 | 15 | 22.06 | 1.06e-01 | extr | 0.0 | -- | -- | 131.3 | 2.7 | 0.89 | 0.02 | 16 | 60.72 | 3.95e-07 | flat | 16.0 | 2.10 | 7.5 | 106.8 | 4.6 | 1.14 | 0.05 | 15 | 25.59 | 4.26e-02 | flat | 0.0 | -- | -- | 131.5 | 2.7 | 0.87 | 0.02 | 16 | 77.93 | 3.92e-10 | 0.245223617784179 | -0.116620972116651 | 0.962426582209472 | |||||||
| 238 | RBS 797 | 2202 | 146.802887 | 76.387056 | 135.031609 | 36.053101 | 11700 | I3 | 0.3540 | 7.68 | d | 7902 | 38300 | S3 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 24 | 0.30 | 20.0 | 2.40 | 8.3 | 95.2 | 9.0 | 1.72 | 0.14 | 21 | 89.64 | 1.86e-10 | extr | 0.0 | -- | -- | 116.2 | 8.0 | 0.98 | 0.06 | 22 | 1061.58 | 1.51e-210 | flat | 20.9 | 2.40 | 8.9 | 93.2 | 9.1 | 1.75 | 0.15 | 21 | 104.70 | 4.22e-13 | flat | 0.0 | -- | -- | 114.6 | 8.0 | 0.96 | 0.06 | 22 | 1188.56 | 1.25e-237 | 0.128865483355103 | -0.196948762187285 | 0.971907851739326 | |||||
| 239 | Abell 2256 | 1386 | 255.935696 | 78.636531 | 111.007158 | 31.765731 | 12400 | I3 | 0.0579 | 6.90 | a | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 63 | 0.35 | 349.6 | 11.60 | 30.2 | 7.0 | 7.6 | 2.54 | 0.93 | 60 | 2.24 | 1.00e+00 | extr | 0.0 | -- | -- | 378.4 | 6.9 | 0.08 | 0.02 | 61 | 21.60 | 1.00e+00 | flat | 349.6 | 11.60 | 30.2 | 7.0 | 7.6 | 2.54 | 0.93 | 60 | 2.24 | 1.00e+00 | flat | 0.0 | -- | -- | 378.4 | 6.9 | 0.08 | 0.02 | 61 | 21.60 | 1.00e+00 | -0.191125981636053 | -0.0478809621251759 | 0.98039699745033 | ||||||
| 240 | Abell 2294 | 3246 | 261.042287 | 85.886047 | 118.581822 | 28.589946 | 10000 | I3 | 0.1780 | 9.98 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 22 | 0.32 | 128.5 | 52.00 | 2.5 | 246.7 | 75.6 | 1.04 | 0.32 | 19 | 0.60 | 1.00e+00 | extr | 0.0 | -- | -- | 409.8 | 28.7 | 0.57 | 0.09 | 20 | 3.67 | 1.00e+00 | flat | 156.3 | 52.70 | 3.0 | 235.7 | 76.3 | 1.03 | 0.33 | 19 | 0.83 | 1.00e+00 | flat | 0.0 | -- | -- | 428.8 | 28.6 | 0.49 | 0.08 | 20 | 4.23 | 1.00e+00 | -0.0708653619468596 | -0.0111703622900129 | 0.997423342158409 |
3. Retrieving a subset of a HEASARC catalog#
If you aren’t interested in the entire catalog, then we can also use Astroquery to impose some restrictions on the rows we retrieve, based on the values of certain columns.
For example, perhaps we’re only interested in galaxy clusters with a \(z>0.4\). We saw in
Section 1 that the ACCEPT catalog includes
a column called redshift, we can use that to filter the rows we retrieve.
The query_region(...) call below will return all columns (columns="*"), and all rows where the
value of the redshift column is greater than 0.4 (column_filters={"redshift": (">", "0.4")}):
accept_cat_higherz = Heasarc.query_region(
catalog="acceptcat",
spatial="all-sky",
column_filters={"redshift": (">", "0.4")},
columns="*",
)
accept_cat_higherz
Table length=20
| __row | name | obsid_1 | ra | dec | lii | bii | exposure_obsid_1 | center_ccd_obsid_1 | redshift | kt | notes | obsid_2 | exposure_obsid_2 | center_ccd_obsid_2 | obsid_3 | exposure_obsid_3 | center_ccd_obsid_3 | obsid_4 | exposure_obsid_4 | center_ccd_obsid_4 | obsid_5 | exposure_obsid_5 | center_ccd_obsid_5 | obsid_6 | exposure_obsid_6 | center_ccd_obsid_6 | obsid_7 | exposure_obsid_7 | center_ccd_obsid_7 | fit_method_1 | num_radial_bins | max_fit_radius | bf_core_entropy_1 | bf_core_entropy_1_error | num_sigma_k0_gt_0_1 | bf_100k_entropy_1 | bf_100k_entropy_1_error | alpha_1 | alpha_1_error | dof_1 | chi_squared_1 | p_value_1 | fit_method_2 | bf_core_entropy_2 | bf_core_entropy_2_error | num_sigma_k0_gt_0_2 | bf_100k_entropy_2 | bf_100k_entropy_2_error | alpha_2 | alpha_2_error | dof_2 | chi_squared_2 | p_value_2 | fit_method_3 | bf_core_entropy_3 | bf_core_entropy_3_error | num_sigma_k0_gt_0_3 | bf_100k_entropy_3 | bf_100k_entropy_3_error | alpha_3 | alpha_3_error | dof_3 | chi_squared_3 | p_value_3 | fit_method_4 | bf_core_entropy_4 | bf_core_entropy_4_error | num_sigma_k0_gt_0_4 | bf_100k_entropy_4 | bf_100k_entropy_4_error | alpha_4 | alpha_4_error | dof_4 | chi_squared_4 | p_value_4 | __x_ra_dec | __y_ra_dec | __z_ra_dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| deg | deg | deg | deg | s | keV | s | s | s | s | s | s | Mpc | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | ||||||||||||||||||||||||||||||||||||||||||||||||||
| object | object | int32 | float64 | float64 | float64 | float64 | float64 | object | float64 | float64 | object | int32 | float64 | object | int32 | float64 | object | int32 | float64 | object | int32 | float64 | object | int32 | float64 | object | int32 | float64 | object | object | int16 | float64 | float64 | float64 | float64 | float64 | float64 | float64 | float64 | int16 | float64 | object | object | float64 | float64 | float64 | float64 | float64 | float64 | float64 | int16 | float64 | object | object | float64 | float64 | float64 | float64 | float64 | float64 | float64 | int16 | float64 | object | object | float64 | float64 | float64 | float64 | float64 | float64 | float64 | int16 | float64 | object | float64 | float64 | float64 |
| 50 | MACS J0257.1-2325 | 1654 | 44.288042 | -23.434958 | 212.568244 | -61.416916 | 19800 | I3 | 0.5053 | 10.50 | 3581 | 18500 | I3 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 13 | 0.40 | 234.5 | 68.20 | 3.4 | 195.8 | 107.3 | 1.39 | 0.57 | 10 | 0.24 | 1.00e+00 | extr | 0.0 | -- | -- | 489.1 | 50.9 | 0.47 | 0.12 | 11 | 3.07 | 9.90e-01 | flat | 234.5 | 68.20 | 3.4 | 195.8 | 107.3 | 1.39 | 0.57 | 10 | 0.24 | 1.00e+00 | flat | 0.0 | -- | -- | 489.1 | 50.9 | 0.47 | 0.12 | 11 | 3.07 | 9.90e-01 | 0.640667436797526 | 0.656790501024463 | -0.397707773611885 | ||||||
| 70 | MACS J2214.9-1359 | 3259 | 333.739446 | -14.002597 | 44.732830 | -51.287190 | 19500 | I3 | 0.5026 | 8.80 | 5011 | 18500 | I3 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 13 | 0.40 | 238.6 | 88.30 | 2.7 | 203.6 | 152.6 | 1.38 | 0.66 | 10 | 0.08 | 1.00e+00 | extr | 0.0 | -- | -- | 507.6 | 70.9 | 0.52 | 0.16 | 11 | 2.25 | 9.97e-01 | flat | 297.7 | 83.20 | 3.6 | 172.0 | 147.7 | 1.46 | 0.76 | 10 | 0.10 | 1.00e+00 | flat | 0.0 | -- | -- | 534.0 | 73.0 | 0.40 | 0.14 | 11 | 2.62 | 9.95e-01 | -0.429306267142518 | 0.870142886221827 | -0.241965878895571 | ||||||
| 81 | MACS J0417.5-1154 | 3270 | 64.394525 | -11.909086 | 205.946190 | -39.478259 | 12000 | I3 | 0.4400 | 11.07 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 11 | 0.30 | 9.5 | 6.70 | 1.4 | 101.6 | 14.8 | 1.52 | 0.22 | 8 | 0.88 | 9.99e-01 | extr | 0.0 | -- | -- | 117.2 | 9.2 | 1.29 | 0.13 | 9 | 2.51 | 9.81e-01 | flat | 27.1 | 7.30 | 3.7 | 99.7 | 15.1 | 1.42 | 0.23 | 8 | 1.16 | 9.97e-01 | flat | 0.0 | -- | -- | 136.1 | 9.4 | 0.85 | 0.08 | 9 | 7.22 | 6.14e-01 | 0.882381324716955 | 0.422869972297137 | -0.206359357239186 | |||||||
| 82 | RX J1347.5-1145 | 3592 | 206.877471 | -11.752792 | 324.037353 | 48.807613 | 57700 | I3 | 0.4510 | 10.88 | 507 | 10000 | S3 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 8 | 0.22 | 12.5 | 20.70 | 0.6 | 179.9 | 35.3 | 1.06 | 0.34 | 5 | 4.00 | 5.49e-01 | extr | 0.0 | -- | -- | 196.4 | 18.3 | 0.90 | 0.08 | 6 | 4.23 | 6.46e-01 | flat | 12.5 | 20.70 | 0.6 | 179.9 | 35.3 | 1.06 | 0.34 | 5 | 4.00 | 5.49e-01 | flat | 0.0 | -- | -- | 196.4 | 18.3 | 0.90 | 0.08 | 6 | 4.23 | 6.46e-01 | -0.442606319178165 | -0.873275588033894 | -0.203689453746662 | ||||||
| 88 | MACS J0159.8-0849 | 3265 | 29.956054 | -8.833583 | 167.589086 | -65.587449 | 17900 | I3 | 0.4050 | 9.59 | 6106 | 35300 | I3 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 15 | 0.40 | 11.9 | 4.00 | 3.0 | 133.7 | 10.0 | 1.25 | 0.08 | 12 | 2.47 | 9.98e-01 | extr | 0.0 | -- | -- | 155.7 | 5.8 | 1.06 | 0.04 | 13 | 9.44 | 7.39e-01 | flat | 18.8 | 3.70 | 5.0 | 123.9 | 9.9 | 1.31 | 0.09 | 12 | 3.68 | 9.89e-01 | flat | 0.0 | -- | -- | 158.3 | 5.9 | 1.01 | 0.04 | 13 | 21.08 | 7.13e-02 | 0.49341276292893 | 0.8561317777342 | -0.15356504984051 | ||||||
| 89 | MACS J1206.2-0847 | 3277 | 181.551150 | -8.800667 | 284.398677 | 52.435818 | 23500 | I3 | 0.4400 | 10.21 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 30 | 0.80 | 61.0 | 10.10 | 6.0 | 97.1 | 14.6 | 1.27 | 0.11 | 27 | 1.38 | 1.00e+00 | extr | 0.0 | -- | -- | 181.0 | 8.5 | 0.84 | 0.05 | 28 | 25.36 | 6.08e-01 | flat | 69.0 | 10.10 | 6.8 | 94.7 | 14.5 | 1.28 | 0.11 | 27 | 1.87 | 1.00e+00 | flat | 0.0 | -- | -- | 190.5 | 8.3 | 0.78 | 0.05 | 28 | 30.00 | 3.63e-01 | -0.0267506692930981 | -0.987864473097787 | -0.15299733489052 | |||||||
| 97 | MACS J1311.0-0310 | 3258 | 197.756937 | -3.177639 | 312.551088 | 59.327746 | 14900 | I3 | 0.4940 | 5.60 | 6110 | 63200 | I3 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 14 | 0.40 | 42.5 | 4.20 | 10.1 | 67.1 | 7.4 | 1.58 | 0.12 | 11 | 2.47 | 9.96e-01 | extr | 0.0 | -- | -- | 127.7 | 3.9 | 0.84 | 0.04 | 12 | 67.11 | 1.11e-09 | flat | 47.4 | 4.10 | 11.5 | 63.5 | 7.3 | 1.62 | 0.12 | 11 | 2.39 | 9.97e-01 | flat | 0.0 | -- | -- | 130.2 | 3.9 | 0.77 | 0.04 | 12 | 77.77 | 1.10e-11 | -0.304510700863697 | -0.950894602365 | -0.0554318342886903 | ||||||
| 98 | MS J0451.6-0305 | 902 | 73.545850 | -3.014497 | 201.496536 | -27.329422 | 44200 | S3 | 0.5386 | 8.90 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 16 | 0.50 | 568.1 | 115.60 | 4.9 | 15.6 | 49.9 | 2.81 | 2.27 | 13 | 0.56 | 1.00e+00 | extr | 0.0 | -- | -- | 643.5 | 79.7 | 0.21 | 0.16 | 14 | 3.73 | 9.97e-01 | flat | 568.1 | 115.60 | 4.9 | 15.6 | 49.9 | 2.81 | 2.27 | 13 | 0.56 | 1.00e+00 | flat | 0.0 | -- | -- | 643.5 | 79.7 | 0.21 | 0.16 | 14 | 3.73 | 9.97e-01 | 0.957719635637492 | 0.282856032808359 | -0.0525886320254252 | |||||||
| 101 | MACS J0329.6-0211 | 3257 | 52.423671 | -2.196575 | 186.444973 | -44.674225 | 9900 | I3 | 0.4500 | 5.20 | 3582 | 19900 | I3 | 6108 | 39600 | I3 | -- | -- | -- | -- | -- | -- | -- | -- | extr | 14 | 0.40 | 6.6 | 2.70 | 2.4 | 102.9 | 6.5 | 1.21 | 0.07 | 11 | 9.63 | 5.64e-01 | extr | 0.0 | -- | -- | 115.4 | 3.6 | 1.08 | 0.03 | 12 | 14.83 | 2.51e-01 | flat | 11.1 | 2.50 | 4.4 | 96.7 | 6.4 | 1.26 | 0.07 | 11 | 11.91 | 3.71e-01 | flat | 0.0 | -- | -- | 117.5 | 3.6 | 1.03 | 0.03 | 12 | 26.77 | 8.33e-03 | 0.791959295208179 | 0.60936970170641 | -0.0383280755531222 | |||||
| 150 | MS J0016.9+1609 | 520 | 4.639596 | 16.436942 | 111.606529 | -45.710539 | 67400 | I3 | 0.5410 | 8.94 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 16 | 0.50 | 160.7 | 22.60 | 7.1 | 65.0 | 26.7 | 1.28 | 0.30 | 13 | 3.17 | 9.97e-01 | extr | 0.0 | -- | -- | 258.5 | 11.8 | 0.40 | 0.05 | 14 | 15.63 | 3.37e-01 | flat | 162.1 | 22.50 | 7.2 | 64.2 | 26.5 | 1.29 | 0.30 | 13 | 3.17 | 9.97e-01 | flat | 0.0 | -- | -- | 259.3 | 11.7 | 0.40 | 0.05 | 14 | 15.74 | 3.30e-01 | 0.077582014360677 | 0.955988867639352 | 0.282959919418579 | |||||||
| 158 | MACS J2228.5+2036 | 3285 | 337.141133 | 20.621753 | 83.309076 | -31.043160 | 19900 | I3 | 0.4120 | 7.86 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 22 | 0.60 | 118.8 | 39.20 | 3.0 | 107.2 | 45.9 | 1.00 | 0.26 | 19 | 0.60 | 1.00e+00 | extr | 0.0 | -- | -- | 246.7 | 17.6 | 0.55 | 0.07 | 20 | 4.67 | 1.00e+00 | flat | 118.8 | 39.20 | 3.0 | 107.2 | 45.9 | 1.00 | 0.26 | 19 | 0.60 | 1.00e+00 | flat | 0.0 | -- | -- | 246.7 | 17.6 | 0.55 | 0.07 | 20 | 4.67 | 1.00e+00 | -0.363572129177368 | 0.862422504590038 | 0.352197005186134 | |||||||
| 165 | MACS J1149.5+2223 | 1656 | 177.399400 | 22.398617 | 228.183659 | 75.199566 | 18500 | I3 | 0.5440 | 8.40 | 3589 | 20000 | I3 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 32 | 1.00 | 280.7 | 39.20 | 7.2 | 33.1 | 20.6 | 1.47 | 0.30 | 29 | 1.62 | 1.00e+00 | extr | 0.0 | -- | -- | 282.3 | 22.1 | 0.52 | 0.06 | 30 | 15.32 | 9.88e-01 | flat | 280.7 | 39.20 | 7.2 | 33.1 | 20.6 | 1.47 | 0.30 | 29 | 1.62 | 1.00e+00 | flat | 0.0 | -- | -- | 282.3 | 22.1 | 0.52 | 0.06 | 30 | 15.32 | 9.88e-01 | 0.0419502600453015 | -0.923603029438388 | 0.381048054311216 | ||||||
| 167 | RX J1423.8+2404 | 1657 | 215.948996 | 24.077903 | 29.756425 | 68.985917 | 18500 | I3 | 0.5450 | 5.92 | 4195 | 115600 | S3 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 7 | 0.22 | 10.2 | 5.00 | 2.0 | 119.9 | 10.8 | 1.27 | 0.17 | 4 | 1.75 | 7.82e-01 | extr | 0.0 | -- | -- | 133.8 | 7.3 | 1.02 | 0.05 | 5 | 15.01 | 1.03e-02 | flat | 10.2 | 5.00 | 2.0 | 119.9 | 10.8 | 1.27 | 0.17 | 4 | 1.75 | 7.82e-01 | flat | 0.0 | -- | -- | 133.8 | 7.3 | 1.02 | 0.05 | 5 | 15.01 | 1.03e-02 | -0.535985261695602 | -0.739103133782009 | 0.407978377954898 | ||||||
| 185 | CL J1226.9+3332 | 3180 | 186.743221 | 33.546489 | 160.861079 | 81.693799 | 31700 | I3 | 0.8900 | 10.00 | 5014 | 32700 | I3 | 932 | 9800 | S3 | -- | -- | -- | -- | -- | -- | -- | -- | extr | 10 | 0.40 | 166.0 | 45.20 | 3.7 | 99.0 | 58.7 | 1.41 | 0.50 | 7 | 0.75 | 9.98e-01 | extr | 0.0 | -- | -- | 308.7 | 25.3 | 0.55 | 0.10 | 8 | 4.81 | 7.78e-01 | flat | 166.0 | 45.20 | 3.7 | 99.0 | 58.7 | 1.41 | 0.50 | 7 | 0.75 | 9.98e-01 | flat | 0.0 | -- | -- | 308.7 | 25.3 | 0.55 | 0.10 | 8 | 4.81 | 7.78e-01 | -0.0978621713887831 | -0.827672290014249 | 0.552613405332916 | |||||
| 196 | MACS J0717.5+3745 | 1655 | 109.381892 | 37.755144 | 180.248221 | 21.046348 | 19900 | I3 | 0.5480 | 10.50 | 4200 | 59200 | I3 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 16 | 0.50 | 158.7 | 111.60 | 1.4 | 202.0 | 128.8 | 0.69 | 0.35 | 13 | 1.31 | 1.00e+00 | extr | 0.0 | -- | -- | 378.6 | 26.0 | 0.40 | 0.07 | 14 | 2.63 | 1.00e+00 | flat | 220.1 | 96.40 | 2.3 | 160.1 | 112.2 | 0.76 | 0.40 | 13 | 1.03 | 1.00e+00 | flat | 0.0 | -- | -- | 404.8 | 25.2 | 0.33 | 0.06 | 14 | 3.02 | 9.99e-01 | 0.745827433154779 | -0.262382378386643 | 0.612288271540393 | ||||||
| 198 | MACS J1621.3+3810 | 3254 | 245.353338 | 38.169069 | 60.940422 | 45.056261 | 9800 | I3 | 0.4610 | 7.53 | 3594 | 19700 | I3 | 6109 | 37500 | I3 | 6172 | 29800 | I3 | -- | -- | -- | -- | -- | -- | extr | 17 | 0.50 | 13.9 | 5.60 | 2.5 | 135.0 | 11.6 | 1.16 | 0.08 | 14 | 6.71 | 9.45e-01 | extr | 0.0 | -- | -- | 158.9 | 5.8 | 1.01 | 0.04 | 15 | 11.72 | 7.00e-01 | flat | 20.1 | 5.40 | 3.7 | 129.8 | 11.4 | 1.18 | 0.08 | 14 | 7.04 | 9.33e-01 | flat | 0.0 | -- | -- | 164.4 | 5.8 | 0.96 | 0.04 | 15 | 16.97 | 3.21e-01 | -0.714566125255865 | -0.327858115797443 | 0.61798406819478 | ||||
| 201 | MACS J0744.8+3927 | 3197 | 116.220008 | 39.456781 | 180.126050 | 26.651590 | 20200 | I3 | 0.6860 | 11.29 | 3585 | 19900 | I3 | 6111 | 49500 | I3 | -- | -- | -- | -- | -- | -- | -- | -- | extr | 17 | 0.60 | 39.5 | 11.00 | 3.6 | 113.9 | 17.4 | 1.10 | 0.11 | 14 | 3.84 | 9.96e-01 | extr | 0.0 | -- | -- | 170.4 | 7.6 | 0.81 | 0.05 | 15 | 11.91 | 6.86e-01 | flat | 42.4 | 10.90 | 3.9 | 112.0 | 17.2 | 1.11 | 0.12 | 14 | 3.88 | 9.96e-01 | flat | 0.0 | -- | -- | 172.6 | 7.5 | 0.79 | 0.04 | 15 | 12.98 | 6.04e-01 | 0.692657845631228 | -0.341130415296276 | 0.635495986332956 | |||||
| 219 | 3C 295 | 2254 | 212.834500 | 52.202931 | 97.516619 | 60.802477 | 90900 | I3 | 0.4641 | 5.16 | d | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 17 | 0.50 | 12.6 | 2.60 | 4.9 | 84.5 | 6.4 | 1.45 | 0.07 | 14 | 7.52 | 9.13e-01 | extr | 0.0 | -- | -- | 108.2 | 3.8 | 1.20 | 0.04 | 15 | 27.39 | 2.57e-02 | flat | 14.5 | 2.50 | 5.8 | 81.9 | 6.3 | 1.47 | 0.07 | 14 | 8.36 | 8.70e-01 | flat | 0.0 | -- | -- | 109.3 | 3.8 | 1.18 | 0.04 | 15 | 34.84 | 2.59e-03 | -0.332305024287539 | -0.514955228040827 | 0.790186360263627 | ||||||
| 220 | MACS J1115.2+5320 | 3253 | 168.815133 | 53.334253 | 150.540508 | 58.331314 | 8800 | I3 | 0.4390 | 8.03 | 5008 | 18000 | I3 | 5350 | 6900 | I3 | -- | -- | -- | -- | -- | -- | -- | -- | extr | 18 | 0.50 | 292.3 | 60.50 | 4.8 | 27.6 | 42.3 | 1.73 | 1.01 | 15 | 3.47 | 9.99e-01 | extr | 0.0 | -- | -- | 334.8 | 32.1 | 0.33 | 0.10 | 16 | 6.98 | 9.74e-01 | flat | 292.3 | 60.50 | 4.8 | 27.6 | 42.3 | 1.73 | 1.01 | 15 | 3.47 | 9.99e-01 | flat | 0.0 | -- | -- | 334.8 | 32.1 | 0.33 | 0.10 | 16 | 6.98 | 9.74e-01 | 0.115831489217526 | -0.585803786783803 | 0.802132775477606 | |||||
| 236 | RX J0647.7+7015 | 3196 | 101.958454 | 70.247128 | 144.845228 | 25.114171 | 19300 | I3 | 0.5840 | 9.07 | 3584 | 20000 | I3 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 24 | 0.80 | 225.1 | 47.10 | 4.8 | 48.8 | 31.9 | 1.70 | 0.39 | 21 | 0.42 | 1.00e+00 | extr | 0.0 | -- | -- | 275.6 | 32.0 | 0.71 | 0.10 | 22 | 9.72 | 9.89e-01 | flat | 225.1 | 47.10 | 4.8 | 48.8 | 31.9 | 1.70 | 0.39 | 21 | 0.42 | 1.00e+00 | flat | 0.0 | -- | -- | 275.6 | 32.0 | 0.71 | 0.10 | 22 | 9.72 | 9.89e-01 | 0.330629440642765 | -0.0700269207743348 | 0.941159074411503 |
If we want to further restrict the results, we can use boolean operators to add extra filtering conditions. Here, for instance, we’ve decided we only want the higher-redshift, low-central-entropy, galaxy clusters to be returned:
accept_cat_higherz_lowk = Heasarc.query_region(
catalog="acceptcat",
spatial="all-sky",
column_filters={"redshift": (">", "0.4"), "bf_core_entropy_1": ("<", "15")},
columns="*",
)
accept_cat_higherz_lowk
Table length=7
| __row | name | obsid_1 | ra | dec | lii | bii | exposure_obsid_1 | center_ccd_obsid_1 | redshift | kt | notes | obsid_2 | exposure_obsid_2 | center_ccd_obsid_2 | obsid_3 | exposure_obsid_3 | center_ccd_obsid_3 | obsid_4 | exposure_obsid_4 | center_ccd_obsid_4 | obsid_5 | exposure_obsid_5 | center_ccd_obsid_5 | obsid_6 | exposure_obsid_6 | center_ccd_obsid_6 | obsid_7 | exposure_obsid_7 | center_ccd_obsid_7 | fit_method_1 | num_radial_bins | max_fit_radius | bf_core_entropy_1 | bf_core_entropy_1_error | num_sigma_k0_gt_0_1 | bf_100k_entropy_1 | bf_100k_entropy_1_error | alpha_1 | alpha_1_error | dof_1 | chi_squared_1 | p_value_1 | fit_method_2 | bf_core_entropy_2 | bf_core_entropy_2_error | num_sigma_k0_gt_0_2 | bf_100k_entropy_2 | bf_100k_entropy_2_error | alpha_2 | alpha_2_error | dof_2 | chi_squared_2 | p_value_2 | fit_method_3 | bf_core_entropy_3 | bf_core_entropy_3_error | num_sigma_k0_gt_0_3 | bf_100k_entropy_3 | bf_100k_entropy_3_error | alpha_3 | alpha_3_error | dof_3 | chi_squared_3 | p_value_3 | fit_method_4 | bf_core_entropy_4 | bf_core_entropy_4_error | num_sigma_k0_gt_0_4 | bf_100k_entropy_4 | bf_100k_entropy_4_error | alpha_4 | alpha_4_error | dof_4 | chi_squared_4 | p_value_4 | __x_ra_dec | __y_ra_dec | __z_ra_dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| deg | deg | deg | deg | s | keV | s | s | s | s | s | s | Mpc | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | ||||||||||||||||||||||||||||||||||||||||||||||||||
| object | object | int32 | float64 | float64 | float64 | float64 | float64 | object | float64 | float64 | object | int32 | float64 | object | int32 | float64 | object | int32 | float64 | object | int32 | float64 | object | int32 | float64 | object | int32 | float64 | object | object | int16 | float64 | float64 | float64 | float64 | float64 | float64 | float64 | float64 | int16 | float64 | object | object | float64 | float64 | float64 | float64 | float64 | float64 | float64 | int16 | float64 | object | object | float64 | float64 | float64 | float64 | float64 | float64 | float64 | int16 | float64 | object | object | float64 | float64 | float64 | float64 | float64 | float64 | float64 | int16 | float64 | object | float64 | float64 | float64 |
| 81 | MACS J0417.5-1154 | 3270 | 64.394525 | -11.909086 | 205.946190 | -39.478259 | 12000 | I3 | 0.4400 | 11.07 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 11 | 0.30 | 9.5 | 6.70 | 1.4 | 101.6 | 14.8 | 1.52 | 0.22 | 8 | 0.88 | 9.99e-01 | extr | 0.0 | -- | -- | 117.2 | 9.2 | 1.29 | 0.13 | 9 | 2.51 | 9.81e-01 | flat | 27.1 | 7.30 | 3.7 | 99.7 | 15.1 | 1.42 | 0.23 | 8 | 1.16 | 9.97e-01 | flat | 0.0 | -- | -- | 136.1 | 9.4 | 0.85 | 0.08 | 9 | 7.22 | 6.14e-01 | 0.882381324716955 | 0.422869972297137 | -0.206359357239186 | |||||||
| 82 | RX J1347.5-1145 | 3592 | 206.877471 | -11.752792 | 324.037353 | 48.807613 | 57700 | I3 | 0.4510 | 10.88 | 507 | 10000 | S3 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 8 | 0.22 | 12.5 | 20.70 | 0.6 | 179.9 | 35.3 | 1.06 | 0.34 | 5 | 4.00 | 5.49e-01 | extr | 0.0 | -- | -- | 196.4 | 18.3 | 0.90 | 0.08 | 6 | 4.23 | 6.46e-01 | flat | 12.5 | 20.70 | 0.6 | 179.9 | 35.3 | 1.06 | 0.34 | 5 | 4.00 | 5.49e-01 | flat | 0.0 | -- | -- | 196.4 | 18.3 | 0.90 | 0.08 | 6 | 4.23 | 6.46e-01 | -0.442606319178165 | -0.873275588033894 | -0.203689453746662 | ||||||
| 88 | MACS J0159.8-0849 | 3265 | 29.956054 | -8.833583 | 167.589086 | -65.587449 | 17900 | I3 | 0.4050 | 9.59 | 6106 | 35300 | I3 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 15 | 0.40 | 11.9 | 4.00 | 3.0 | 133.7 | 10.0 | 1.25 | 0.08 | 12 | 2.47 | 9.98e-01 | extr | 0.0 | -- | -- | 155.7 | 5.8 | 1.06 | 0.04 | 13 | 9.44 | 7.39e-01 | flat | 18.8 | 3.70 | 5.0 | 123.9 | 9.9 | 1.31 | 0.09 | 12 | 3.68 | 9.89e-01 | flat | 0.0 | -- | -- | 158.3 | 5.9 | 1.01 | 0.04 | 13 | 21.08 | 7.13e-02 | 0.49341276292893 | 0.8561317777342 | -0.15356504984051 | ||||||
| 101 | MACS J0329.6-0211 | 3257 | 52.423671 | -2.196575 | 186.444973 | -44.674225 | 9900 | I3 | 0.4500 | 5.20 | 3582 | 19900 | I3 | 6108 | 39600 | I3 | -- | -- | -- | -- | -- | -- | -- | -- | extr | 14 | 0.40 | 6.6 | 2.70 | 2.4 | 102.9 | 6.5 | 1.21 | 0.07 | 11 | 9.63 | 5.64e-01 | extr | 0.0 | -- | -- | 115.4 | 3.6 | 1.08 | 0.03 | 12 | 14.83 | 2.51e-01 | flat | 11.1 | 2.50 | 4.4 | 96.7 | 6.4 | 1.26 | 0.07 | 11 | 11.91 | 3.71e-01 | flat | 0.0 | -- | -- | 117.5 | 3.6 | 1.03 | 0.03 | 12 | 26.77 | 8.33e-03 | 0.791959295208179 | 0.60936970170641 | -0.0383280755531222 | |||||
| 167 | RX J1423.8+2404 | 1657 | 215.948996 | 24.077903 | 29.756425 | 68.985917 | 18500 | I3 | 0.5450 | 5.92 | 4195 | 115600 | S3 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 7 | 0.22 | 10.2 | 5.00 | 2.0 | 119.9 | 10.8 | 1.27 | 0.17 | 4 | 1.75 | 7.82e-01 | extr | 0.0 | -- | -- | 133.8 | 7.3 | 1.02 | 0.05 | 5 | 15.01 | 1.03e-02 | flat | 10.2 | 5.00 | 2.0 | 119.9 | 10.8 | 1.27 | 0.17 | 4 | 1.75 | 7.82e-01 | flat | 0.0 | -- | -- | 133.8 | 7.3 | 1.02 | 0.05 | 5 | 15.01 | 1.03e-02 | -0.535985261695602 | -0.739103133782009 | 0.407978377954898 | ||||||
| 198 | MACS J1621.3+3810 | 3254 | 245.353338 | 38.169069 | 60.940422 | 45.056261 | 9800 | I3 | 0.4610 | 7.53 | 3594 | 19700 | I3 | 6109 | 37500 | I3 | 6172 | 29800 | I3 | -- | -- | -- | -- | -- | -- | extr | 17 | 0.50 | 13.9 | 5.60 | 2.5 | 135.0 | 11.6 | 1.16 | 0.08 | 14 | 6.71 | 9.45e-01 | extr | 0.0 | -- | -- | 158.9 | 5.8 | 1.01 | 0.04 | 15 | 11.72 | 7.00e-01 | flat | 20.1 | 5.40 | 3.7 | 129.8 | 11.4 | 1.18 | 0.08 | 14 | 7.04 | 9.33e-01 | flat | 0.0 | -- | -- | 164.4 | 5.8 | 0.96 | 0.04 | 15 | 16.97 | 3.21e-01 | -0.714566125255865 | -0.327858115797443 | 0.61798406819478 | ||||
| 219 | 3C 295 | 2254 | 212.834500 | 52.202931 | 97.516619 | 60.802477 | 90900 | I3 | 0.4641 | 5.16 | d | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 17 | 0.50 | 12.6 | 2.60 | 4.9 | 84.5 | 6.4 | 1.45 | 0.07 | 14 | 7.52 | 9.13e-01 | extr | 0.0 | -- | -- | 108.2 | 3.8 | 1.20 | 0.04 | 15 | 27.39 | 2.57e-02 | flat | 14.5 | 2.50 | 5.8 | 81.9 | 6.3 | 1.47 | 0.07 | 14 | 8.36 | 8.70e-01 | flat | 0.0 | -- | -- | 109.3 | 3.8 | 1.18 | 0.04 | 15 | 34.84 | 2.59e-03 | -0.332305024287539 | -0.514955228040827 | 0.790186360263627 |
4. Interacting with HEASARC catalog contents#
The returns from our calls to the Heasarc.query_region method are Astropy
Table objects:
type(accept_cat)
astropy.table.table.Table
You can extract information similarly to a Pandas DataFrame; e.g., indexing with a
column name string retrieves the entries in that column:
# Extract source names from our subset of the ACCEPT catalog
accept_cat_higherz_lowk["name"]
<MaskedColumn name='name' dtype='object' description='Cluster Designation' length=7>
| MACS J0417.5-1154 |
| RX J1347.5-1145 |
| MACS J0159.8-0849 |
| MACS J0329.6-0211 |
| RX J1423.8+2404 |
| MACS J1621.3+3810 |
| 3C 295 |
To retrieve the entries for a row in the table, you can index with an
integer; e.g., 0 for the first row:
accept_cat_higherz_lowk[0]
Row index=0
| __row | name | obsid_1 | ra | dec | lii | bii | exposure_obsid_1 | center_ccd_obsid_1 | redshift | kt | notes | obsid_2 | exposure_obsid_2 | center_ccd_obsid_2 | obsid_3 | exposure_obsid_3 | center_ccd_obsid_3 | obsid_4 | exposure_obsid_4 | center_ccd_obsid_4 | obsid_5 | exposure_obsid_5 | center_ccd_obsid_5 | obsid_6 | exposure_obsid_6 | center_ccd_obsid_6 | obsid_7 | exposure_obsid_7 | center_ccd_obsid_7 | fit_method_1 | num_radial_bins | max_fit_radius | bf_core_entropy_1 | bf_core_entropy_1_error | num_sigma_k0_gt_0_1 | bf_100k_entropy_1 | bf_100k_entropy_1_error | alpha_1 | alpha_1_error | dof_1 | chi_squared_1 | p_value_1 | fit_method_2 | bf_core_entropy_2 | bf_core_entropy_2_error | num_sigma_k0_gt_0_2 | bf_100k_entropy_2 | bf_100k_entropy_2_error | alpha_2 | alpha_2_error | dof_2 | chi_squared_2 | p_value_2 | fit_method_3 | bf_core_entropy_3 | bf_core_entropy_3_error | num_sigma_k0_gt_0_3 | bf_100k_entropy_3 | bf_100k_entropy_3_error | alpha_3 | alpha_3_error | dof_3 | chi_squared_3 | p_value_3 | fit_method_4 | bf_core_entropy_4 | bf_core_entropy_4_error | num_sigma_k0_gt_0_4 | bf_100k_entropy_4 | bf_100k_entropy_4_error | alpha_4 | alpha_4_error | dof_4 | chi_squared_4 | p_value_4 | __x_ra_dec | __y_ra_dec | __z_ra_dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| deg | deg | deg | deg | s | keV | s | s | s | s | s | s | Mpc | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | cm2 keV | ||||||||||||||||||||||||||||||||||||||||||||||||||
| object | object | int32 | float64 | float64 | float64 | float64 | float64 | object | float64 | float64 | object | int32 | float64 | object | int32 | float64 | object | int32 | float64 | object | int32 | float64 | object | int32 | float64 | object | int32 | float64 | object | object | int16 | float64 | float64 | float64 | float64 | float64 | float64 | float64 | float64 | int16 | float64 | object | object | float64 | float64 | float64 | float64 | float64 | float64 | float64 | int16 | float64 | object | object | float64 | float64 | float64 | float64 | float64 | float64 | float64 | int16 | float64 | object | object | float64 | float64 | float64 | float64 | float64 | float64 | float64 | int16 | float64 | object | float64 | float64 | float64 |
| 81 | MACS J0417.5-1154 | 3270 | 64.394525 | -11.909086 | 205.946190 | -39.478259 | 12000 | I3 | 0.4400 | 11.07 | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- | extr | 11 | 0.30 | 9.5 | 6.70 | 1.4 | 101.6 | 14.8 | 1.52 | 0.22 | 8 | 0.88 | 9.99e-01 | extr | 0.0 | -- | -- | 117.2 | 9.2 | 1.29 | 0.13 | 9 | 2.51 | 9.81e-01 | flat | 27.1 | 7.30 | 3.7 | 99.7 | 15.1 | 1.42 | 0.23 | 8 | 1.16 | 9.97e-01 | flat | 0.0 | -- | -- | 136.1 | 9.4 | 0.85 | 0.08 | 9 | 7.22 | 6.14e-01 | 0.882381324716955 | 0.422869972297137 | -0.206359357239186 |
You can also convert the return to a Pandas DataFrame if you prefer working with
one of these data structures:
accept_cat_higherz_lowk_pd = accept_cat_higherz_lowk.to_pandas()
accept_cat_higherz_lowk_pd
| __row | name | obsid_1 | ra | dec | lii | bii | exposure_obsid_1 | center_ccd_obsid_1 | redshift | ... | bf_100k_entropy_4 | bf_100k_entropy_4_error | alpha_4 | alpha_4_error | dof_4 | chi_squared_4 | p_value_4 | __x_ra_dec | __y_ra_dec | __z_ra_dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | 81 | MACS J0417.5-1154 | 3270 | 64.394525 | -11.909086 | 205.946190 | -39.478259 | 12000.0 | I3 | 0.4400 | ... | 136.1 | 9.4 | 0.85 | 0.08 | 9 | 7.22 | 6.14e-01 | 0.882381 | 0.422870 | -0.206359 |
| 1 | 82 | RX J1347.5-1145 | 3592 | 206.877471 | -11.752792 | 324.037353 | 48.807613 | 57700.0 | I3 | 0.4510 | ... | 196.4 | 18.3 | 0.90 | 0.08 | 6 | 4.23 | 6.46e-01 | -0.442606 | -0.873276 | -0.203689 |
| 2 | 88 | MACS J0159.8-0849 | 3265 | 29.956054 | -8.833583 | 167.589086 | -65.587449 | 17900.0 | I3 | 0.4050 | ... | 158.3 | 5.9 | 1.01 | 0.04 | 13 | 21.08 | 7.13e-02 | 0.493413 | 0.856132 | -0.153565 |
| 3 | 101 | MACS J0329.6-0211 | 3257 | 52.423671 | -2.196575 | 186.444973 | -44.674225 | 9900.0 | I3 | 0.4500 | ... | 117.5 | 3.6 | 1.03 | 0.03 | 12 | 26.77 | 8.33e-03 | 0.791959 | 0.609370 | -0.038328 |
| 4 | 167 | RX J1423.8+2404 | 1657 | 215.948996 | 24.077903 | 29.756425 | 68.985917 | 18500.0 | I3 | 0.5450 | ... | 133.8 | 7.3 | 1.02 | 0.05 | 5 | 15.01 | 1.03e-02 | -0.535985 | -0.739103 | 0.407978 |
| 5 | 198 | MACS J1621.3+3810 | 3254 | 245.353338 | 38.169069 | 60.940422 | 45.056261 | 9800.0 | I3 | 0.4610 | ... | 164.4 | 5.8 | 0.96 | 0.04 | 15 | 16.97 | 3.21e-01 | -0.714566 | -0.327858 | 0.617984 |
| 6 | 219 | 3C 295 | 2254 | 212.834500 | 52.202931 | 97.516619 | 60.802477 | 90900.0 | I3 | 0.4641 | ... | 109.3 | 3.8 | 1.18 | 0.04 | 15 | 34.84 | 2.59e-03 | -0.332305 | -0.514955 | 0.790186 |
7 rows × 79 columns
About this notebook#
Author: David Turner, HEASARC Staff Scientist
Updated On: 2026-07-17
Additional Resources#
Support: HEASARC Helpdesk
Acknowledgements#
References#
Ginsburg, Sipőcz, Brasseur et al. (2019) - astroquery: An Astronomical Web-querying Package in Python
Cavagnolo K. W., Donahue M., Voit G. M., Sun M. (2009) - Intracluster Medium Entropy Profiles for a Chandra Archival Sample of Galaxy Clusters
Evans I. N., Evans J. D., Martínez-Galarza J. R., Miller J. B. et al. (2024) - The Chandra Source Catalog Release 2 Series
Chandra Source Catalog 2 DOI - doi:10.25574/csc2
Demleitner M. and Heinl H. (2024) - A Short Course on ADQL; Virtual Observatory Resource