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Data Model: erass1cl_main_v3.2

General description
The primary catalog of 12,247 optically confirmed galaxy groups and clusters detected in the 0.2-2.3 keV as extended X-ray sources in a 13116 square degree region in the western Galactic hemisphere of the sky, which eROSITA surveyed in its first six months of operation. The clusters in the sample span the redshift range from 0.003 to 1.32. See Bulbul et al. (2024) for further details.


Filename:
erass1cl_main_v3.2.fits

Approximate size
48 MB

File type
FITS

Sections

Content of the page (HDU means "Header Data Unit" of a fits file).

HDU0: PRIMARY

HDU Type
IMAGE
HDU Size
16 KB

HDU1: Joined

Write text to summarize contents of this HDU

HDU Type
BINARY TABLE
HDU Size
48 MB
Binary Table Caption for HDU1
NameTypeUnitDescription
DETUID char[32] None Unique source ID
NAME char[23] None Source name 1eRASS JHHMMSS.s+DDMMSS
RA float64 deg Right ascension (J2000)
DEC float64 deg Declination (J2000)
RA_XFIT float64 deg Best-fit RA from MBProj2D
DEC_XFIT float64 deg Best-fit DEC from MBProj2D
EXT_LIKE float32 None Source extent likelihood
DET_LIKE_0 float32 None Source detection likelihood in 0.2-2.3keV
EXP float32 None Average exposure
BEST_Z float64 None Best available redshift
BEST_ZERR float64 None 1 sigma error of BEST_Z
BEST_Z_TYPE char[16] None type of BEST_Z
PCONT float64 None Probability of being a contaminant
CR300kpc float64 s-1 0.2-2.3keV count rate within 300kpc
CR300kpc_L float64 s-1 1sigma lower limit of CR300kpc
CR300kpc_H float64 s-1 1sigma upper limit of CR300kpc
CR500 float64 s-1 0.2-2.3keV count rate within R500
CR500_L float64 s-1 1sigma lower limit of CR500
CR500_H float64 s-1 1sigma upper limit of CR500
CTS300kpc float64 None 0.2-2.3keV counts within 300kpc
CTS300kpc_L float64 None 1sigma lower limit of CTS300kpc
CTS300kpc_H float64 None 1sigma upper limit of CTS300kpc
CTS500 float64 None 0.2-2.3keV counts within R500
CTS500_L float64 None 1sigma lower limit of CTS500
CTS500_H float64 None 1sigma upper limit of CTS500
F300kpc float64 10**-14 cm-2 erg s-1 0.2-2.3keV flux within 300kpc
F300kpc_L float64 10**-14 cm-2 erg s-1 1sigma lower limit of F300kpc
F300kpc_H float64 10**-14 cm-2 erg s-1 1sigma upper limit of F300kpc
F500 float64 10**-14 cm-2 erg s-1 0.2-2.3keV flux within R500
F500_L float64 10**-14 cm-2 erg s-1 1sigma lower limit of F500
F500_H float64 10**-14 cm-2 erg s-1 1sigma upper limit of F500
L300kpc float64 10**42 erg s-1 0.2-2.3keV luminosity within 300kpc
L300kpc_L float64 10**42 erg s-1 1sigma lower limit of L300kpc
L300kpc_H float64 10**42 erg s-1 1sigma upper limit of L300kpc
L500 float64 10**42 erg s-1 0.2-2.3keV luminosity within R500
L500_L float64 10**42 erg s-1 1sigma lower limit of L500
L500_H float64 10**42 erg s-1 1sigma upper limit of L500
CR300kpc0520 float64 s-1 0.5-2.0keV count rate within 300kpc
CR300kpc_L0520 float64 s-1 1sigma lower limit of CR300kpc0520
CR300kpc_H0520 float64 s-1 1sigma upper limit of CR300kpc0520
CR500_0520 float64 s-1 0.5-2.0keV count rate within R500
CR500_L_0520 float64 s-1 1sigma lower limit of CR500_0520
CR500_H_0520 float64 s-1 1sigma upper limit of CR500_0520
CTS300kpc0520 float64 None 0.5-2.0keV counts within 300kpc
CTS300kpc_L0520 float64 None 1sigma lower limit of CTS300kpc0520
CTS300kpc_H0520 float64 None 1sigma upper limit of CTS300kpc0520
CTS500_0520 float64 None 0.5-2.0keV counts within R500
CTS500_L_0520 float64 None 1sigma lower limit of CTS500_0520
CTS500_H_0520 float64 None 1sigma upper limit of CTS500_0520
F300kpc0520 float64 10**-14 cm-2 erg s-1 0.5-2.0keV flux within 300kpc
F300kpc_L0520 float64 10**-14 cm-2 erg s-1 1sigma lower limit of F300kpc0520
F300kpc_H0520 float64 10**-14 cm-2 erg s-1 1sigma upper limit of F300kpc0520
F500_0520 float64 10**-14 cm-2 erg s-1 0.5-2.0keV flux within R500
F500_L_0520 float64 10**-14 cm-2 erg s-1 1sigma lower limit of F500_0520
F500_H_0520 float64 10**-14 cm-2 erg s-1 1sigma upper limit of F500_0520
L300kpc0520 float64 10**42 erg s-1 0.5-2.0keV luminosity within 300kpc
L300kpc_L0520 float64 10**42 erg s-1 1sigma lower limit of L300kpc0520
L300kpc_H0520 float64 10**42 erg s-1 1sigma upper limit of L300kpc0520
L500_0520 float64 10**42 erg s-1 0.5-2.0keV luminosity within R500
L500_L_0520 float64 10**42 erg s-1 1sigma lower limit of L500_0520
L500_H_0520 float64 10**42 erg s-1 1sigma upper limit of L500_0520
Lbol500 float64 10**42 erg s-1 Bolometric luminosity within R500
Lbol500_L float64 10**42 erg s-1 1sigma lower limit of Lbol500
Lbol500_H float64 10**42 erg s-1 1sigma upper limit of Lbol500
KT float64 keV ICM temperature measured by MBProj2D
KT_L float64 keV 1sigma lower limit of KT
KT_H float64 keV 1sigma upper limit of KT
MGAS500 float64 10**11 solMass Gas Mass within R500
MGAS500_L float64 10**11 solMass 1sigma lower limit of MGAS500
MGAS500_H float64 10**11 solMass 1sigma upper limit of MGAS500
YX500 float64 10**11 keV solMass The mass proxy Yx within R500
YX500_L float64 10**11 keV solMass 1sigma lower limit of YX500
YX500_H float64 10**11 keV solMass 1sigma upper limit of YX500
M500 float64 10**13 solMass Total mass within R500
M500_L float64 10**13 solMass 1sigma lower limit of M500
M500_H float64 10**13 solMass 1sigma upper limit of M500
FGAS500 float64 None Gas Mass fraction within R500
FGAS500_L float64 None 1sigma lower limit of FGAS500
FGAS500_H float64 None 1sigma upper limit of FGAS500
R500 float64 kpc Overdensity Radius R500
R500_L float64 kpc 1sigma lower limit of R500
R500_H float64 kpc 1sigma upper limit of R500
MATCH_NAME char[240] None ID of matched counterparts in literature cluster catalogs
M500_PDF float64[200] None Probability density function of M500
M500_PDF_array float64[200] solMass M500 corresponding to M500_PDF

References

Bulbul, E., et al., The SRG/eROSITA All-Sky Survey: The First Catalog of Galaxy Clusters and Groups in the Western Galactic Hemisphere, A&A, 685, A106 (2024)

Acknowledgement

This work is based on data from eROSITA, the soft X-ray instrument aboard SRG, a joint Russian-German science mission supported by the Russian Space Agency (Roskosmos), in the interests of the Russian Academy of Sciences represented by its Space Research Institute (IKI), and the Deutsches Zentrum für Luft- und Raumfahrt (DLR). The SRG spacecraft was built by Lavochkin Association (NPOL) and its subcontractors and is operated by NPOL with support from the Max Planck Institute for Extraterrestrial Physics (MPE). The development and construction of the eROSITA X-ray instrument was led by MPE, with contributions from the Dr. Karl Remeis Observatory Bamberg \& ECAP (FAU Erlangen-Nuernberg), the University of Hamburg Observatory, the Leibniz Institute for Astrophysics Potsdam (AIP), and the Institute for Astronomy and Astrophysics of the University of Tübingen, with the support of DLR and the Max Planck Society. The Argelander Institute for Astronomy of the University of Bonn and the Ludwig Maximilians Universität Munich also participated in the science preparation for eROSITA. The eROSITA data shown here were processed using the eSASS/NRTA software system developed by the German eROSITA consortium.