J/A+A/661/A2 Galaxy clusters and groups in eFEDS (Liu+, 2022)
The eROSITA Final Equatorial-Depth Survey (eFEDS).
Catalog of galaxy clusters and groups.
Liu A., Bulbul E., Ghirardini V., Liu T., Klein M., Clerc N., Oezsoy Y.,
Ramos-Ceja M. E., Pacaud F., Comparat J., Okabe N., Bahar Y. E., Biffi V.,
Brunner H., Brueggen M., Buchner J., Ider Chitham J., Chiu I., Dolag K.,
Gatuzz E., Gonzalez J., Hoang D. N., Lamer G., Merloni A., Nandra K.,
Oguri M., Ota N., Predehl P., Reiprich T. H., Salvato M., Schrabback T.,
Sanders J. S., Seppi R., Thibaud Q.
<Astron. Astrophys. 661, A2 (2022)>
=2022A&A...661A...2L 2022A&A...661A...2L (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Surveys ; X-ray sources
Keywords: surveys - galaxies: clusters: general -
galaxies: clusters: intracluster medium - X-rays: galaxies: clusters
Abstract:
The eROSITA Final Equatorial-Depth Survey has been carried out during
the PV phase of the SRG/eROSITA telescope and completed in November
2019. In the 140 deg2 area covered by eFEDS, 542 candidate clusters
and groups are detected as extended X-ray sources, down to a flux of
∼10-14erg/s/cm2 in the soft band (0.5-2keV) within 1'. We provide
the catalog of candidate galaxy clusters and groups in eFEDS. We
perform imaging and spectral analysis on the eFEDS clusters with
eROSITA X-ray data, and study the properties of the sample. The
clusters are distributed in the redshift range [0.01, 1.3], with the
median redshift at 0.35. We obtain the ICM temperature measurement
with >2σ c.l. for ∼1/5 (102/542) of the sample. The average
temperature of these clusters is ∼2keV. Radial profiles of flux,
luminosity, electron density, and gas mass are measured from the
precise modeling of the imaging data. The selection function, the
purity and completeness of the catalog are examined and discussed in
detail. The contamination fraction is ∼1/5 in this sample, dominated
by misidentified point sources. The X-ray Luminosity Function of the
clusters agrees well with the results obtained from other recent X-ray
surveys. We also find 19 supercluster candidates in eFEDS.
Description:
This catalog contains the 542 galaxy cluster and group candidates
detected in the eROSITA Final Equatorial-Depth Survey (eFEDS). The
coordinates, redshift, and main X-ray properties of these sources
including temperature, luminosity, and flux, measured with the eROSITA
data, are presented.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
efeds_cl.dat 229 542 eFEDS cluster catalog
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See also:
J/A+A/661/A1 : The eFEDS X-ray catalogs (V7.4) (Brunner+, 2022)
J/A+A/661/A3 : eFEDS counterparts to point-like sources (Salvato+, 2022)
J/A+A/661/A4 : eFEDS optical cluster and group catalog (Klein+, 2022)
J/A+A/661/A5 : The eFEDS AGN catalog (Liu+, 2022)
J/A+A/661/A7 : X-ray properties of eFEDS clusters and groups (Bahar+, 2022)
J/A+A/661/A8 : eFEDS catalogue of variable X-ray sources (Boller+, 2022)
J/A+A/661/A10 : eFEDS galaxy clusters and groups in disguise (Bulbul+, 2022)
J/A+A/661/A23 : Exoplanet X-ray irradiation & evaporation rates (Foster+, 2022)
J/A+A/661/A24 : Corona-chromosphere connection (Fuhrmeister+, 2022)
J/A+A/661/A29 : First eROSITA study of nearby M dwarfs (Magaudda+, 2022)
J/A+A/661/A34 : eta Cha cluster eROSITA X-ray scan (Robrade+, 2022)
J/A+A/661/A35 : eROSITA study of 47 Tuc globular cluster (Saeedi+, 2022)
J/A+A/661/A38 : SRG/ART-XC 1st year all-sky X-ray survey (Pavlinsky+, 2022)
J/A+A/661/A40 : eRASS1 X-ray sources Sco-Cen members (Schmitt+, 2022)
J/A+A/661/A44 : A first eROSITA view of ultracool dwarfs (Stelzer+, 2022)
Byte-by-byte Description of file: efeds_cl.dat
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Bytes Format Units Label Explanations
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1- 22 A22 --- ID Cluster ID (eFEDS JHHMMSS.s+DDMMSS)
24- 28 I5 --- ID-SRC Unique source ID
30- 37 F8.4 deg RAdeg Right ascension (J2000.0)
39- 45 F7.4 deg DEdeg Declination (J2000.0)
47- 51 F5.1 --- ExtLike Extent likelihood
53- 58 F6.1 --- DetLike Detection likelihood
60- 64 F5.3 --- z Redshift
66 I1 --- zType [0/1] 0=photo-z, 1=spec-z
68- 71 F4.2 keV T300kpc ? Temperature within 300kpc
73- 76 F4.2 keV e_T300kpc ? 1sigma lower limit of T_300kpc
78- 82 F5.2 keV E_T300kpc ? 1sigma upper limit of T_300kpc
84- 88 F5.2 10+36W L300kpc ? Soft band lum within 300kpc
(in 1043erg/s unit)
90- 94 F5.2 10+36W e_L300kpc ? 1sigma lower limit of L_300kpc
(in 1043erg/s unit)
96-101 F6.2 10+36W E_L300kpc 1sigma upper limit of L_300kpc
(in 1043erg/s unit)
103-108 F6.2 10+36W Lbol300kpc ? Bolometric lum within 300kpc
(in 1043erg/s unit)
110-115 F6.2 10+36W e_Lbol300kpc ? 1sigma lower lim of Lbol_300kpc
(in 1043erg/s unit)
117-123 F7.2 10+36W E_Lbol300kpc 1sigma upper lim of Lbol_300kpc
(in 1043erg/s unit)
125-129 F5.2 10-17W/m2 F300kpc ? Soft band flux within 300kpc
(in 10-14erg/s/cm2 units)
131-135 F5.2 10-17W/m2 e_F300kpc ? 1sigma lower limit of F_300kpc
(in 10-14erg/s/cm2 units)
137-142 F6.2 10-17W/m2 E_F300kpc 1sigma upper limit of F_300kpc
(in 10-14erg/s/cm2 units)
144-147 F4.2 keV T500kpc ? Temperature within 500kpc
149-152 F4.2 keV e_T500kpc ? 1sigma lower limit of T_500kpc
154-157 F4.2 keV E_T500kpc ? 1sigma upper limit of T_500kpc
159-163 F5.2 10+36W L500kpc ? Soft band lum within 500kpc
(in 1043erg/s unit)
165-169 F5.2 10+36W e_L500kpc ? 1sigma lower limit of L_500kpc
(in 1043erg/s unit)
171-176 F6.2 10+36W E_L500kpc 1sigma upper limit of L_500kpc
(in 1043erg/s unit)
178-183 F6.2 10+36W Lbol500kpc ? Bolometric lum within 500kpc
(in 1043erg/s unit)
185-190 F6.2 10+36W e_Lbol500kpc ? 1sigma lower lim of Lbol_500kpc
(in 1043erg/s unit)
192-198 F7.2 10+36W E_Lbol500kpc 1sigma upper lim of Lbol_500kpc
(in 1043erg/s unit)
200-205 F6.2 10-17W/m2 F500kpc ? Soft band flux within 500kpc
(in 10-14erg/s/cm2 units)
207-212 F6.2 10-17W/m2 e_F500kpc ? 1sigma lower limit of F_500kpc
(in 10-14erg/s/cm2 units)
214-219 F6.2 10-17W/m2 E_F500kpc 1sigma upper limit of F_500kpc
(in 10-14erg/s/cm2 units)
221-224 F4.1 --- SNRMax Maximum signal to noise ratio
226-229 F4.2 arcmin RSNRMax Radius corresponding to SNR_MAX
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Acknowledgements:
Ang Liu, liuang(at)mpe.mpg.de
References:
The Early Data Release of eROSITA and Mikhail Pavlinsky ART-XC on the
SRG mission, 2022, A&A, 661, A1-A46
(End) Ang Liu [MPE, Germany], Patricia Vannier [CDS] 06-Aug-2021