J/MNRAS/488/739 MARD-Y3 catalog (Klein+, 2019)
A new RASS galaxy cluster catalogue with low contamination extending to
z∼1 in the DES overlap region.
Klein M., Grandis S., Mohr J.J., Paulus M., Abbott T.M.C., Annis J.,
Avila S., Bertin E., Brooks D., Buckley-Geer E., Carnero Rosell A.,
Carrasco Kind M., Carretero J., Castander F.J., Cunha C.E., D'Andrea C.B.,
da Costa L.N., De Vicente J., Desai S., Diehl H.T., Dietrich J.P., Doel P.,
Evrard A.E., Flaugher B., Fosalba P., Frieman J., Garcia-Bellido J.,
Gaztanaga E., Giles P.A., Gruen D., Gruendl R.A., Gschwend J., Gutierrez G.,
Hartley W.G., Hollowood D.L., Honscheid K., Hoyle B., James D.J.,
Jeltema T., Kuehn K., Kuropatkin N., Lima M., Maia M.A.G., March M.,
Marshall J.L., Menanteau F., Miquel R., Ogando R.L.C., Plazas A.A.,
Romer A.K., Roodman A., Sanchez E., Scarpine V., Schindler R., Serrano S.,
Sevilla-Noarbe I., Smith M., Smith R.C., Soares-Santos M., Sobreira F.,
Suchyta E., Swanson M.E.C., Tarle G., Thomas D., Vikram V.,
DES Collaboration
<Mon. Not. R. Astron. Soc. 488, 739-769 (2019)>
=2019MNRAS.488..739K 2019MNRAS.488..739K (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; X-ray sources ; Redshifts
Keywords: galaxies: clusters: general -
galaxies: clusters: intracluster medium -
galaxies: distances and redshifts
Abstract:
We present the MARD-Y3 catalogue of between 1086 and 2171 galaxy
clusters (52 per cent and 65 per cent new) produced using
multicomponent matched filter (MCMF) follow-up in 5000 deg2 of
DES-Y3 optical data of the ∼20000 overlapping ROSAT All-Sky Survey
source catalogue (2RXS) X-ray sources. Optical counterparts are
identified as peaks in galaxy richness as a function of redshift along
the line of sight towards each 2RXS source within a search region
informed by an X-ray prior. All peaks are assigned a probability fcont
of being a random superposition. The clusters lie at 0.02<z<1.1 with
more than 100 clusters at z>0.5. Residual contamination is 2.6 per
cent and 9.6 per cent for the cuts adopted here. For each cluster we
present the optical centre, redshift, rest frame X-ray luminosity,
M500 mass, coincidence with NWAY infrared sources, and estimators of
dynamical state. About ∼2 per cent of MARD-Y3 clusters have multiple
possible counterparts, the photo-z's are high quality with
σ{DELTA}z/(1+z)=0.0046, and ∼1 per cent of clusters exhibit
evidence of X-ray luminosity boosting from emission by cluster active
galactic nuclei. Comparison with other catalogues (MCXC, RM, SPT-SZ,
Planck) is performed to test consistency of richness, luminosity, and
mass estimates. We measure the MARD-Y3 X-ray luminosity function and
compare it to the expectation from a fiducial cosmology and externally
calibrated luminosity- and richness-mass relations. Agreement is good,
providing evidence that MARD-Y3 has low contamination and can be
understood as a simple two step selection - X-ray and then optical -
of an underlying cluster population described by the halo mass
function.
Description:
This is the MARD-Y3 catalog. X-ray selected, optically confirmed
cluster catalog (see abstract and paper). The intput X-ray catalog is
the RASS based 2RXS catalog (Boller+16). Entries from RA_DEG to EXI_ML
are taken from 2RXS. Names are based on 2RXS but the first 3 letters
are replaced by MARD (Multi-component mAtch filter confirmed RASS
sources using DES data. MCMF keeps up to three counterparts P1..P3)
per X-ray candidate. entries ending with P1..P3 correspond to the
different peaks. Entries ending in _LFCR show the counter part with
the lowest f_cont, therefore most likely counterpart.
F_cont provides a measure of the contamination fraction caused by
random superpositions. A catalog is expected to have a contamination
fraction of X when clusters are selected as f_cont≤X.
he full catalog provided here is cut at fcontLFCR≤0.2 and therefore
allows for 20% residual contamination by chance super positions
between 2RXS source and optical counter part. The X-ray source
detection tends to detect large extended sources as multiple sources.
We therefore suggest to exclude multiple detections by selection
MULTIPLE_FLAG=0, the most likely counter part will remain in the
sample but sourrounding multiples will be excluding. Remaining
contamination can be reduced by selecting DSIGLFCR<2 (sigma), which
excludes candidates with a reasonable WISE counterpart in NWAY and
differs more than 2 sigma high (too high luminosity given richness)
from the mean luminosity richness relation. DFC_LFCR provides the
difference between lowest and second lowest f_cont of the X-ray
source. This allows to identify cases with multiple counter parts at
different redshifts.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
mard-y3.dat 1028 2959 MARD-Y3 catalog
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See also:
J/A+A/588/A103 : Second ROSAT all-sky survey (2RXS) source catalog
(Boller+, 2016)
Byte-by-byte Description of file: mard-y3.dat
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Bytes Format Units Label Explanations
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1- 20 A20 --- Name Name, MARDJHHMMSS.s+DDMMSS (NAME)
22- 42 F21.17 deg RAdeg X-ray right ascension (J2000)
from 2RXS (RA_DEG)
44- 64 F21.17 deg DEdeg X-ray declination (J2000) from
2RXS (DEC_DEG)
66- 84 F19.14 s ExpTime RASS exposure time (EXPOSURE)
86- 105 F20.15 ct Cts X-ray source counts (CTS)
107- 124 F18.15 ct e_Cts Error on counts (CERR)
126- 145 F20.18 ct/s CRate X-ray count rate (RATE)
147- 166 F20.18 ct/s e_CRate Error on the rate (ERATE)
168- 187 F20.18 pix Ext X-ray extend [PIX] (EXT)
189- 206 F18.16 pix e_Ext Error on extend (EXTERR)
208- 231 F24.19 --- ExtML Extend likelihood (EXT_ML)
233- 252 F20.15 --- ExiML Existence likelihood (EXI_ML)
254- 272 F19.17 --- zP1 Redshift P1 (Z_P1)
274- 293 F20.17 --- zP2 ?=-0.1 Redshift P2 (Z_P2)
295- 314 F20.17 --- zP3 ?=-0.1 Redshift P3 (Z_P3)
316- 334 F19.15 --- LambdaP1 Richness P1 (LAMBDA_P1)
336- 357 E22.17 --- LambdaP2 ?=-0.1 Richness P2 (LAMBDA_P2)
359- 378 F20.17 --- LambdaP3 ?=-0.1 Richness P3 (LAMBDA_P3)
380- 399 F20.16 deg RAP1deg ?=361 Optical right ascension of P1
(J2000) (RA_P1)
401- 419 F19.15 deg RAP2deg ?=361 Optical right ascension of P2
(J2000) (RA_P2)
421- 439 F19.15 deg RAP3deg ?=361 Optical right ascension of P3
(J2000) (RA_P3)
441- 462 F22.18 deg DEP1deg ?=91 Optical declination of P1 (J2000)
(DEC_P1)
464- 483 F20.16 deg DEP2deg ?=91 Optical declination of P2 (J2000)
(DEC_P2)
485- 504 F20.16 deg DEP3deg ?=91 Optical declination of P3 (J2000)
(DEC_P3)
506 I1 --- fMult [0/1] 1 for multiple detection in X-rays,
0 else (MULTIPLE_FLAG)
508- 529 F22.17 --- P1Lcorr Corrected luminosity P1 (LUMP1CORR)
531- 551 F21.17 --- P2Lcorr ?=0 Corrected luminosity P2 (LUMP2CORR)
553- 574 F22.17 --- P3Lcorr ?=0 Corrected luminosity P3 (LUMP3CORR)
576- 596 E21.15 Msun P1M500corr Corrected mass M_500 P1 (M500P1CORR)
598- 618 E21.15 Msun P2M500corr ?=0 Corrected mass M_500 P2
(M500P2CORR)
620- 640 E21.15 Msun P3M500corr ?=0 Corrected mass M_500 P3
(M500P3CORR)
642- 659 F18.15 --- e_LambdaP1 Error on richness P1 (ELAMBDAP1)
661- 679 F19.16 --- e_LambdaP2 ?=-0.1 Error on richness P2
(ELAMBDAP2)
681- 700 F20.17 --- e_LambdaP3 ?=-0.1 Error on richness P3
(ELAMBDAP3)
702- 719 F18.15 --- e_LambdaLFCR Error on richness for best counter part
(ELAMBDALFCR)
721- 739 F19.15 --- LambdaLFCR Richness of best counter part
(LAMBDA_LFCR)
741- 761 E21.15 --- FcontP1 Probability fcont of being a random
superposition for P1 (FCONTR_P1)
763- 783 F21.18 --- FcontP2 ?=99 Probability fcont of being a
random superposition for P2
(FCONTR_P2)
785- 804 F20.17 --- FcontP3 ?=99 Probability fcont of being a
random superposition for P3
(FCONTR_P3)
806- 824 F19.17 --- zLFCR Redshift of best counter part (Z_LFCR)
826- 846 E21.15 --- FcontLFCR Probability fcont of being a random
superposition of best counter part
(FCONTLFCR)
848- 870 F23.18 --- LFCRL (raw) luminosity of best counter part
(LUM_LFCR)
872- 892 E21.15 Msun LFCM500corr Corrected M500 of best counter part
(M500LFCRCORR)
894- 914 E21.15 Msun LFCM500 (raw) M500 of best counter part
(M500_LFCR)
916- 937 F22.17 --- LFCRLcorr Corrected luminosity of best counter part
(LUMLFCRCORR)
939- 958 F20.16 deg RALFCRdeg ?=361 RA (optical) of best counter part
(J2000) (RA_LFCR)
960- 981 F22.18 deg DELFCRdeg ?=91 DEC (optical) of best counter part
(J2000) (DEC_LFCR)
983-1005 F23.19 --- DsigLFCR ?=-99.9 Distance from mean scaling for
WISE matches (DSIGLFCR)
1007-1028 F22.18 --- DfcLFCR Difference lowest to second lowest f_cont
(DFC_LFCR)
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Acknowledgements:
Matthias Klein, matthias.klein(at)physik.lmu.de
(End) Patricia Vannier [CDS] 31-Jul-2019