J/PAZh/49/695 SRG/eROSITA zsp of 216 galaxy clusters (Zaznobin+, 2023)
Optical identification and spectroscopic redshift measurements of 216 galaxy
clusters from the SRG/eROSITA all-sky survey.
Zaznobin I.A., Burenin R.A., Belinski A.A., Bikmaev I.F., Gilfanov M.R.,
Dodin A.V., Dodonov S.N., Eselevich M.V., Zheltoukhov S.F.,
Irtuganov E.N., Kotov S.S., Krivonos R.A., Lyskova N.S., Malygin E.A.,
Maslennikova N.A., Medvedev P.S., Meshcheryakov A.V., Moiseev A.V.,
Oparin D.V., Potanin S.A., Postnov K.A., Sazonov S.Yu., Safonov B.S.,
Sakhibullin N.A., Starobinsky A.A., Suslikov M.V., Sunyaev R.A.,
Tatarnikov A.M., Uskov G.S., Uklein R.I., Khabibullin I.I., Khamitov I.M.,
Khorunzhev G.A., Churazov E.M., Shablovinskaya E.S., Shatsky N.I.
<Pis'ma Astron. Zh. 49, 695 (2023)>
=2023PAZh...49..695Z 2023PAZh...49..695Z (SIMBAD/NED BibCode)
=2023AstL...49..599Z 2023AstL...49..599Z
ADC_Keywords: Clusters, galaxy ; Redshifts ; Surveys ; X-ray sources
Keywords: galaxy clusters - sky surveys - optical observations - redshifts
Abstract:
We present the results of the optical identification and spectroscopic
redshift measurements of 216 galaxy clusters detected in the
SRG/eROSITA all-sky X-ray survey. The spectroscopic observations were
performed in 2020-2023 with the 6-m BTA telescope at the Special
Astrophysical Observatory of the Russian Academy of Sciences, the
2.5-m telescope at the Caucasus Mountain Observatory of the Sternberg
Astronomical Institute of the Moscow State University, the 1.6-m
AZT-33IK telescope at the Sayan Solar Observatory of the Institute of
Solar-Terrestrial Physics of the Siberian Branch of the Russian
Academy of Sciences, and the 1.5-m Russian-Turkish telescope (RTT-150)
at the TUBITAK Observatory. For all of the galaxy clusters presented
here the spectroscopic redshift measurements have been obtained for
the first time. Of these, 139 galaxy clusters have been detected for
the first time in the SRG/eROSITA survey and 22 galaxy clusters are at
redshifts zspec≥0.7, including three at zspec≥1. For these
observations the most massive clusters are selected. Therefore, most
of the galaxy clusters presented here most likely will be included in
the cosmological samples of galaxy clusters from the SRG/eROSITA
survey.
Description:
We present the results of the optical identification and spectroscopic
redshifts measurements of 216 galaxy clusters detected in the
SRG/eROSITA all-sky X-ray survey. The main catalog contains redshift
measurements of 216 galaxy clusters indicating the number of galaxies
in the cluster for which were obtained spectroscopic redshift
measurements. The second catalog contains 445 galaxies spectroscopic
redshifts measurements whose spectra were obtained for galaxy clusters
redshifts measurement. This catalog also gives the foreground and
background galaxies redshifts whose light accidentally fell on the
long-slit of the spectrograph.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
clusters.dat 52 216 Clusters spectroscopic redshift measurements
galaxies.dat 59 445 Galaxies spectroscopic redshift measurements
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See also:
J/A+A/682/A34 : SRG/eROSITA all-sky survey catalogs (eRASS1) (Merloni+, 2024)
Byte-by-byte Description of file: clusters.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Index Clusters index
5- 24 A20 --- Name eROSITA source field name
(SRGeJHHMMSS.s+DDMMSS)
26- 34 F9.5 deg RAdeg Right ascension (J2000)
36- 43 F8.4 deg DEdeg Declination (J2000)
45- 50 F6.4 --- zsp Spectroscopic redshift (1)
52 I1 --- Ngal Number of galaxies (2)
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Note (1): The accuracy of measuring redshifts for each galaxy clusters is
different, therefore the table shows a different number of significant figures
for different galaxies.
Note (2): The number of cluster member galaxies whose redshifts were measured.
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Byte-by-byte Description of file: galaxies.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Index Galaxy index
5- 24 A20 --- Name eROSITA source field name
(SRGeJHHMMSS.s+DDMMSS)
26- 34 F9.5 deg RAdeg Right ascension (J2000)
36- 43 F8.4 deg DEdeg Declination (J2000)
45- 50 F6.4 --- zsp Spectroscopic redshift (1)
52- 57 F6.4 --- e_zsp ?=0 Spectroscopic redshift error (1)
59 A1 --- Memb [TF] Cluster member? (2)
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Note (1): The accuracy of measuring redshifts and their errors for each galaxy
is different, therefore the table shows a different number of significant
figures for different galaxies. If the redshift error is 0, it means the error
could not be measured.
Note (2): Cluster member code as follows:
T = is a cluster member
F = foreground or background galaxy
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Acknowledgements:
Igor Zaznobin, zaznobin(at)cosmos.ru
References:
Zaznobin et al., 2021AstL...47...61Z 2021AstL...47...61Z, Spectroscopic redshift measurements for
galaxy clusters from the Planck survey and observations of these clusters
in the SRG/eROSITA Survey
Zaznobin et al., 2021AstL...47..141Z 2021AstL...47..141Z, Spectroscopic redshift measurements for
galaxy clusters from the Lockman Hole survey with the eROSITA telescope
onboard the SRG observatory
Burenin et al., 2021AstL...47..443B 2021AstL...47..443B, Observation of a very massive galaxy
cluster at z = 0.76 in the SRG/eROSITA All-Sky Survey
Burenin et al., 2022AstL...48..702B 2022AstL...48..702B, Observations of massive galaxy clusters
from the all-Sky survey with the eROSITA telescope onboard the SRG
space observatory
(End) Igor Zaznobin [IKI, Russia], Patricia Vannier [CDS] 09-Apr-2024