J/ApJ/817/34 C-COSMOS Legacy sources multiwavelength catalog (Marchesi+, 2016)
The Chandra COSMOS Legacy Survey: optical/IR identifications.
Marchesi S., Civano F., Elvis M., Salvato M., Brusa M., Comastri A.,
Gilli R., Hasinger G., Lanzuisi G., Miyaji T., Treister E., Urry C.M.,
Vignali C., Zamorani G., Allevato V., Cappelluti N., Cardamone C.,
Finoguenov A., Griffiths R.E., Karim A., Laigle C., LaMassa S.M., Jahnke K.,
Ranalli P., Schawinski K., Schinnerer E., Silverman J.D., Smolcic V.,
Suh H., Trakhtenbrot B.
<Astrophys. J., 817, 34 (2016)>
=2016ApJ...817...34M 2016ApJ...817...34M
ADC_Keywords: X-ray sources; Photometry, infrared; Cross identifications;
Optical; Redshifts
Keywords: catalogs ; cosmology: observations ; galaxies: active ;
galaxies: evolution ; surveys ; X-rays: general
Abstract:
We present the catalog of optical and infrared counterparts of the
Chandra COSMOS-Legacy Survey, a 4.6Ms Chandra program on the 2.2deg2
of the COSMOS field, combination of 56 new overlapping observations
obtained in Cycle 14 with the previous C-COSMOS survey. In this Paper
we report the i, K, and 3.6µm identifications of the 2273 X-ray
point sources detected in the new Cycle 14 observations. We use the
likelihood ratio technique to derive the association of
optical/infrared (IR) counterparts for 97% of the X-ray sources. We
also update the information for the 1743 sources detected in C-COSMOS,
using new K and 3.6µm information not available when the C-COSMOS
analysis was performed. The final catalog contains 4016 X-ray sources,
97% of which have an optical/IR counterpart and a photometric
redshift, while ∼54% of the sources have a spectroscopic redshift. The
full catalog, including spectroscopic and photometric redshifts and
optical and X-ray properties described here in detail, is available
online. We study several X-ray to optical (X/O) properties: with our
large statistics we put better constraints on the X/O flux ratio
locus, finding a shift toward faint optical magnitudes in both soft
and hard X-ray band. We confirm the existence of a correlation between
X/O and the the 2-10keV luminosity for Type 2 sources. We extend to
low luminosities the analysis of the correlation between the fraction
of obscured AGNs and the hard band luminosity, finding a different
behavior between the optically and X-ray classified obscured fraction.
Description:
The Chandra COSMOS-Legacy project, i.e., the combination of the 1.8Ms
Chandra COSMOS (C-COSMOS) survey (Elvis+ 2009, J/ApJS/184/158) with
2.8Ms of new Chandra ACIS-I observations (CLS; Paper I, J/ApJ/819/62)
is exploring a new region of the area versus flux space, by using an
unusually large total exposure time (4.6Ms total) with respect to the
observed area (2.15deg2).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
catalog.dat 516 4016 Chandra COSMOS Legacy optical-NIR counterparts
ccosmos.dat 274 1761 Chandra COSMOS (C-COSMOS) identification catalog
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See also:
II/284 : COSMOS Multi-Wavelength Photometry Catalog (Capak+, 2007)
J/ApJ/554/742 : Chandra Deep Survey of the HDF-N (Hornschemeier+, 2001)
J/A+A/371/833 : ROSAT Ultra Deep Survey (Lehmann+, 2001)
J/ApJS/139/369 : Chandra Deep Field South. 1 Ms catalog (Giacconi+, 2002)
J/A+A/393/425 : Spectral analysis of Lockman Hole (Mainieri+, 2002)
J/A+A/409/79 : HELLAS2XMM survey. IV. (Fiore+, 2003)
J/A+A/428/383 : XMM-Newton Bright Serendipitous Survey (Della Ceca+, 2004)
J/A+A/432/69 : Extremely Red Objects XMM-Newton observations (Brusa+, 2005)
J/A+A/466/31 : The HELLAS2XMM survey. VIII (Cocchia+, 2007)
J/ApJS/172/29 : XMM-Newton survey in COSMOS field. I. (Hasinger+, 2007)
J/ApJS/172/70 : zCOSMOS-bright catalog (Lilly+, 2007)
J/ApJS/172/46 : VLA-COSMOS survey. II. (Schinnerer+, 2007)
J/ApJS/172/383 : AGN candidates in the COSMOS field (Trump+, 2007)
J/ApJ/693/8 : High-redshift QSOs in the COSMOS survey (Brusa+, 2009)
J/A+A/497/635 : XMM-Newton wide-field survey in COSMOS (Cappelluti+, 2009)
J/ApJS/184/158 : Chandra COSMOS survey I. (Elvis+, 2009)
J/ApJ/690/1236 : COSMOS photometric redshift catalog (Ilbert+, 2009)
J/ApJS/184/218 : The zCOSMOS 10k-bright spectroscopic sample (Lilly+, 2009)
J/ApJ/696/1195 : COSMOS AGN spectroscopic survey. I. (Trump+, 2009)
J/ApJ/716/348 : The XMM-Newton survey of the COSMOS field (Brusa+, 2010)
J/ApJ/709/572 : COSMOS 70um sources (Kartaltepe+, 2010)
J/ApJS/187/560 : Photometric redshifts of the 2Ms CDF-S (Luo+, 2010)
J/ApJ/708/137 : Broad-line AGNs in zCOSMOS survey (Merloni+, 2010)
J/ApJ/725/480 : Stellar X-ray sources in the COSMOS survey (Wright+, 2010)
J/ApJ/740/37 : Obscured AGN at z∼0.5-1 in the CDFS (Luo+, 2011)
J/A+A/535/A80 : Type-2 QSOs in XMM-COSMOS (Mainieri+, 2011)
J/ApJ/742/61 : Phot. redshift of AGNs from XMM- and C-COSMOS (Salvato+ 2011)
J/ApJS/195/10 : The CDF-S survey: 4Ms source catalogs (Xue+, 2011)
J/MNRAS/427/3103 : COSMOS field supermassive black holes (Bongiorno+, 2012)
J/ApJS/201/30 : The Chandra COSMOS survey. III. (Civano+, 2012)
J/ApJ/759/6 : SEDs of type I AGN in COSMOS. I. XMM-COSMOS (Elvis+, 2012)
J/A+A/542/A16 : X-ray detection of radio-selected SF galaxies (Ranalli+, 2012)
J/MNRAS/436/3581 : X-ray observations of Stripe 82 (LaMassa+, 2013)
J/MNRAS/443/1999 : X-ray spectral analysis of AGNs (Brightman+, 2014)
J/ApJ/790/16 : X-ray ETGs in the Chandra COSMOS survey (Civano+, 2014)
J/MNRAS/438/1288 : SEDs of type I AGN in XMM-COSMOS. II. (Hao+, 2014)
J/ApJ/796/60 : ECDFS galaxies phot. redshifts & counterparts (Hsu+, 2014)
J/AJ/148/137 : Merging galaxies in COSMOS to z∼1 (Lackner+, 2014)
J/ApJ/802/89 : Luminosity function of X-ray-selected AGNs (Buchner+, 2015)
J/ApJ/808/185 : NuSTAR surveys: COSMOS catalog (Civano+, 2015)
J/A+A/575/A40 : [OII] luminosity function (Comparat+, 2015)
J/ApJ/807/129 : X-ray to MIR luminosities relation of AGNs (Stern, 2015)
J/MNRAS/448/3167 : z≳5 AGN in Chandra Deep Field-South (Weigel+, 2015)
J/ApJS/224/24 : The COSMOS2015 catalog (Laigle+, 2016)
http://splash.caltech.edu/ : SPLASH (Spitzer Large Area Survey with
Hyper-Suprime-Cam) home page
Byte-by-byte Description of file: catalog.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- ID CID or LID NNNNNN (id_x) (1)
11- 20 F10.6 deg RAdeg X-ray right ascension (J2000) (RA_x) (2)
22- 31 F10.6 deg DEdeg X-ray declination (J2000) (DEC_x) (2)
33- 40 F8.2 --- DETMLF ?=-99 Maximum likelihood detection value
in 0.5-10keV (DETMLF ) (2)
42- 49 F8.2 --- DETMLS ?=-99 Maximum likelihood detection value
in 0.5-2keV (DETMLS ) (2)
51- 57 F7.2 --- DETMLH ?=-99 Maximum likelihood detection value
in 2-10keV (DETMLH ) (2)
59- 67 E9.3 mW/m2 F0.5-10keV X-ray flux in full band (0.5-10keV)
(flux_F)(2)
69- 77 E9.3 mW/m2 F0.5-2keV X-ray flux in soft band (0.5-2keV) (flux_S)(2)
79- 87 E9.3 mW/m2 F2-10keV X-ray flux in hard band (2-10keV) (flux_H) (2)
89- 94 F6.2 --- HR [-0.95/0.92]?=-99 Hardness ratio (HR ) (2)
96-101 F6.2 --- b_HR [-1/1]?=-99 Hardness ratio 90% lower limit
(HRlolim) (2)
103-108 F6.2 --- B_HR [-1/1]?=-99 Hardness ratio 90% upper limit
(HRuplim) (2)
110-117 I8 --- [ICS2009] [10466/2031046]?=-99 Optical counterpart ID
from Ilbert+ (2009, J/ApJ/690/1236) (id_i)
119-128 F10.6 deg RAOdeg ?=-99 Optical counterpart RA (J2000) (ra_i)
130-139 F10.6 deg DEOdeg ?=-99 Optical counterpart DEC (J2000) (dec_i)
141-146 F6.2 mag imag [12.4/30.7]?=-99 i-band magnitude in 3"
aperture from Ilbert+ (2009) (i_mag)
148-153 F6.2 mag e_imag ?=-99 imag error (imagerr)
155-157 I3 --- r_imag ?=-99 i-band magnitude origin: 1=Subaru,
2=CFHT, 3=SDSS, 5=manual photometry
(flagimag)
159-166 I8 --- COSMOS2015 ?=-99 K-band counterpart identifier from
Laigle+ (2016, J/ApJS/224/24) (idkuv)
168-177 F10.6 deg RAKdeg ?=-99 K-band counterpart RA (J2000) (rakuv)
179-188 F10.6 deg DEKdeg ?=-99 K-band counterpart DE (J2000) (deckuv)
190-195 F6.2 mag Kmag [12/29.6]?=-99 UltraVISTA K-band magnitude in
3" aperture from Laigle+ (kuvmag)
197-202 F6.2 mag e_Kmag [0.01/3.4]?=-99 Kmag error (kuvmag_err)
204-211 I8 --- cfht [0/1733715]?=-99 K-band counterpart ID from
the Ilbert+ (2009) CFHT catalog (idkcfht)
213-222 F10.6 deg RACdeg ?=-99 CFHT K-band counterpart right ascension
(J2000) (rakcfht)
224-233 F10.6 deg DECdeg ?=-99 CFHT K-band counterpart declination
(J2000) (deckcfht)
235-240 F6.2 mag Kmag2 [13/26.6]?=-99 CFHT K-band magnitude in 3"
aperture from Ilbert+ (2009) (kcfhtmag)
242-247 F6.2 mag e_Kmag2 [0.01/20.6]?=-99 Kmag2 error (kcfhtmag_err)
249-258 F10.6 deg RAIdeg ?=-99 IRAC 3.6um counterpart RA (J2000)
from the Sanders catalog (ra_irac)
260-269 F10.6 deg DEIdeg ?=-99 IRAC 3.6um counterpart DEC (J2000)
from the Sanders catalog (dec_irac)
271-276 F6.2 uJy F3.6um [13.5/24.2]?=-99 IRAC 3.6um flux in 1.9"
aperture from the Sanders catalog
(2007ApJS..172...86S 2007ApJS..172...86S) (irac_mag)
278-283 F6.2 uJy e_F3.6um [0.01/0.2]?=-99 F3.6um error (iracmagerr)
285-294 F10.6 deg RASdeg ?=-99 3.6um counterpart RA (J2000)
from the SPLASH catalog (ra_splash)
296-305 F10.6 deg DESdeg ?=-99 3.6um counterpart DEC (J2000)
from the SPLASH catalog (dec_splash)
307-312 F6.2 uJy F3.6um2 [13.7/26.6]?=-99 3.6um flux in 1.9" aperture
from the SPLASH catalog (splash_mag)
314-319 F6.2 uJy e_F3.6um2 [0.01/1.7]?=-99 F3.6um2 error (splashmagerr)
321-323 I3 --- Flag Final identification flag (finalidflag) (G1)
325-327 I3 --- Star [0/100] Star flag (star_flag) (G2)
329-336 F8.4 --- zbest [0/6.9]?=-99 Best redshift available (z_best)
338-344 F7.3 --- zspec [-0.001/5.4]?=-99 Spectroscopic redshift
(z_spec)
346-355 A10 --- Inst Spectroscopic redshift origin (Instr)
357-362 F6.2 --- q_zspec [0/2]?=-99 Spectroscopic redshift quality (Qg)
(3)
364-366 I3 --- Clsp [-9/2]?=-99 Spectroscopic identification
(1=BLAGN, 2=non-BLAGN, 0=star) (spec_type)
368-374 F7.3 --- zphot [0/6.9]?=-99 Photometric redshift from
Salvato M. et al. (in prep.) (z_phot)
376-378 I3 --- Clph [1/5]?=-99 Photometric identification from
SED fitting (1=unobscured, 2=obscured,
3=galaxy, 5=star) (phot_type)
380-386 I7 --- XMMC ?=-99 Identifier number of the XMM-COSMOS
counterpart from
Cappelluti+ (2009, J/A+A/497/635) (id_xmm)
388-396 F9.3 Mpc Dist [0/68709]?=-99 Luminosity distance (dist_lum)
398-404 F7.3 [10-7W] L0.5-10 [-45/46]?=-99 Rest-frame luminosity in
0.5-10keV (Lx_0510)
406-412 F7.3 [10-7W] L0.5-2 [-45/46]?=-99 Rest-frame luminosity in
0.5-2keV (Lx_052)
414-420 F7.3 [10-7W] L2-10 [-46/46]?=-99 Rest-frame luminosity in
2-10keV (Lx_210)
422-428 F7.3 --- NH [0/99.9]?=-99 Intrinsic neutral hydrogen
column density (NH)
430-436 F7.3 --- C0.5-10 [0.4/1]?=-99 Luminosity absorption correction
in 0.5-10keV band (abscorr0510)
438-444 F7.3 --- C0.5-2 [0.009/1]?=-99 Luminosity absorption
correction in 0.5-2keV band (abscorr052)
446-452 F7.3 --- C2-10 [0.6/1]?=-99 Luminosity absorption correction
in 2-10keV band (abscorr210)
454-460 F7.3 --- b_NH [0/99.9]?=-99 Lower limit on intrinsic
NH column density (NH_lo)
462-468 F7.3 --- C0.5-10lo [0.3/1]?=-99 Luminosity absorption correction
in 0.5-10keV assuming b_NH (abscorr0510_lo)
470-476 F7.3 --- C0.5-2lo [0.002/1]?=-99 Luminosity absorption
correction in 0.5-2keV assuming b_NH
(abscorr052_lo)
478-484 F7.3 --- C2-10lo [0.5/1]?=-99 Luminosity absorption correction
in 2-10keV assuming b_NH (abscorr210_lo)
486-492 F7.3 --- B_NH [0/99.9]?=-99 Upper limit on intrinsic
NH column density (NH_up)
494-500 F7.3 --- C0.5-10up [0.3/1]?=-99 Luminosity absorption correction
in 0.5-10keV assuming B_NH (abscorr0510_up)
502-508 F7.3 --- C0.5-2up [0.001/1]?=-99 Luminosity absorption
correction in 0.5-2keV assuming B_NH
(abscorr052_up)
510-516 F7.3 --- C2-10up [0.5/1]?=-99 Luminosity absorption correction
in 2-10keV assuming B_NH (abscorr210_up)
--------------------------------------------------------------------------------
Note (1): Sources are listed in the same order used in Paper I: first all
sources detected in full band, then those detected in soft band only,
then those detected in hard band only.
Note (2): From Paper I (Civano+ 2016, J/ApJ/819/62 ;
<[CMC2016] lid NNNNN> or <[ECV2009] NNNNN> in Simbad).
Note (3): Spectroscopic redshift quality as follows:
2.00 = "secure" redshift, spectroscopic reliability >99.5%,
1.50 = "reliable" redshift, spectroscopic reliability <99.5% but there is a
photometric redshift such that Δz/(1+zspec)<0.1,
1.00 = "not reliable" redshift, spectroscopic reliability <99.5% and there is
a photo-z such that Δz/(1+zspec)>0.1.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: ccosmos.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- --- [CXOC]
5- 20 A16 --- CXOC IAU identificator (HHMMSS.s+DDMMSS; J2000)
22- 26 I5 --- [ECV2009] [1/22962] Chandra identifier (1)
28- 37 F10.6 deg RAdeg [149.5/150.7] X-ray RA (J2000) (1)
39- 46 F8.6 deg DEdeg [1.6/2.8] X-ray declination (J2000) (1)
48- 56 E9.3 mW/m2 F0.5-2keV [-2.1e-15/1.5e-13] 0.5-2keV X-ray flux
(in erg/cm2/s units)
58- 66 E9.3 mW/m2 F2-10keV [-1.7e-14/7e-13] 2-10keV X-ray flux
(in erg/cm2/s units)
68- 76 E9.3 mW/m2 F0.5-10keV [-1.5e-14/7.5e-13] 0.5-10keV X-ray flux
(in erg/cm2/s units)
78- 87 F10.6 deg RACdeg [149.5/150.7]?=-99 Right ascension of
the counterpart (J2000)
89- 98 F10.6 deg DECdeg [1.6/2.8]?=-99 Declination of
the counterpart (J2000)
100-106 I7 --- COSMOS [136961/2791454]?=-99 Optical identifier
from Capak+ 2007, II/284
108-114 I7 --- [ICS2009] [89570/1733715]?=-99 Optical identifier
from Ilbert+ 2009, J/ApJ/690/1236
116-125 F10.6 deg RAOdeg [149.5/150.7]?=-99 Optical counterpart
right ascension (J2000)
127-136 F10.6 deg DEOdeg [1.6/2.8]?=-99 Optical counterpart
declination (J2000)
138-143 F6.2 mag imag [12.4/28.1]?=-99 i-band (AB) magnitude
145-150 F6.2 mag e_imag [0/1.4]?=-99 imag error
152-161 F10.6 deg RAKdeg [149.5/150.7]?=-99 K-band counterpart
right ascension (J2000)
163-172 F10.6 deg DEKdeg [1.6/2.8]?=-99 K-band counterpart
declination (J2000)
174-179 F6.2 mag Kmag [13.1/26.6]?=-99 K-band (AB) magnitude
181-186 F6.2 mag e_Kmag [0.01/2.8]?=-99 Kmag error
188-197 F10.6 deg RAIdeg [149.5/150.7]?=-99 IRAC 3.6um counterpart
right ascension (J2000)
199-208 F10.6 deg DEIdeg [1.6/2.8]?=-99 IRAC 3.6um counterpart
declination (J2000)
210-217 F8.2 uJy F3.6um [0.7/13524]?=-99 Spitzer/IRAC 3.6um flux
219-224 F6.2 uJy e_F3.6um [0.08/14.8]?=-99 F3.6um error
226-228 I3 --- Flag [-99/100] Identification flag (G1)
230-232 I3 --- Star [1/10]?=-99 Star identification flag (G2)
234-236 I3 --- Offnuc [1]?=-99 Off nuclear source identification
flag (according to Mainieri+)
238-244 F7.3 --- zspec [0/5.3]?=-99 Spectroscopic redshift
246-248 I3 --- Clsp [0/2]?=-99 Spectroscopic classification
(1=BLAGN, 2=not-BLAGN, 0=star)
250-252 I3 --- q_zspec [3/9]?=-99 Spectroscopic redshift
quality
254-256 I3 --- r_zspec [1/8]?=-99 Spectroscopic redshift origin
258-264 F7.3 --- zphot [0/6.9]?=-99 Photometric redshift from
Salvato+ 2011
266-268 I3 --- Clph [1/3]?=-99 Photometric redshift
classification
270-274 I5 --- XMMC [1/70250]?=-99 XMM identifier from
Brusa+ 2010, J/ApJ/716/348
--------------------------------------------------------------------------------
Note (1): From Elvis+ 2009, J/ApJS/184/158 ; <[ECV2009] NNNNN> in Simbad.
--------------------------------------------------------------------------------
Global notes:
Note (G1): Final identification flag as follows:
1 = secure (1711 occurrences)
10 = ambiguous
100 = subthreshold
-99 = unidentified
Note (G2): Star flag as follows:
1 = spectroscopically confirmed star
10 = photometric star
100 = visually identified star
--------------------------------------------------------------------------------
Nomenclature note:
cid_NNNNN (Nos 1-22962) are <[ECV2009] NNNNN> in Simbad;
lid_NNNNN (Nos 38-10010) are <[CMC2016] lid NNNNN> in Simbad.
Acknowledgements:
Stefano Marchesi [stefano.marchesi at inaf.it]
History:
Downloaded from http://irsa.ipac.caltech.edu/data/COSMOS/tables/chandra/ :
CCOSMOSidentificationcatalogirsa.dat - 2012-05-30
chandraCOSMOSlegacyoptNIRcounterparts20160113_4d.fits - 2016-03-24
* 27-Feb-2019:Insert into VizieR
* 25-Oct-2022: Full band (0.5-10keV) and hard band (2-10keV) corrected
in the description of catalog.dat
Refernces:
Civano et al. Paper I. 2016ApJ...819...62C 2016ApJ...819...62C Cat. J/ApJ/819/62
(End) Emmanuelle Perret [CDS] 17-Jan-2019