J/ApJS/202/6 XDEEP2 survey catalog (Goulding+, 2012)
The Chandra X-ray point-source catalog in the DEEP2 Galaxy Redshift Survey fields. Goulding A.D., Forman W.R., Hickox R.C., Jones C., Kraft R., Murray S.S., Vikhlinin A., Coil A.L., Cooper M.C., Davis M., Newman J.A. <Astrophys. J. Suppl. Ser., 202, 6 (2012)> =2012ApJS..202....6G
ADC_Keywords: Active gal. nuclei ; X-ray sources ; Surveys ; Galaxies, optical ; Cross identifications Keywords: galaxies: active - surveys - X-rays: galaxies Abstract: We present the X-ray point-source catalog produced from the Chandra Advanced CCD Imaging Spectrometer (ACIS-I) observations of the combined ∼3.2deg2 DEEP2 (XDEEP2) survey fields, which consist of four ∼0.7-1.1deg2 fields. The combined total exposures across all four XDEEP2 fields range from ∼10ks to 1.1Ms. We detect X-ray point sources in both the individual ACIS-I observations and the overlapping regions in the merged (stacked) images. We find a total of 2976 unique X-ray sources within the survey area with an expected false-source contamination of ∼30 sources (≲1%). Additionally, we present a Bayesian-style method for associating the X-ray sources with optical photometric counterparts in the DEEP2 catalog (complete to RAB<25.2) and find that 2126 (∼71.4%±2.8%) of the 2976 X-ray sources presented here have a secure optical counterpart with a ≲6% contamination fraction. We provide the DEEP2 optical source properties (e.g., magnitude, redshift) as part of the X-ray-optical counterpart catalog. Description: The catalog presented here was derived from multi-epoch observations taken during AO3 (PI: K. Nandra), AO6, and AO9, combined with Guaranteed Time Observations (PI: S. Murray; AO9). All Chandra observations for XDEEP2 are publicly available through the Chandra X-Ray Center (CXC) Archive. In Table 2 we provide the individual pointing details for each observation and field. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 80 137 Observation log table5.dat 271 2976 XDEEP2 source catalog table7.dat 96 2976 XDEEP2 X-ray-optical counterpart catalog
See also: II/301 : The DEEP2-DR1 Photometric Catalog (Coil+ 2004) B/chandra : The Chandra Archive Log (CXC, 1999-2012) J/ApJS/193/13 : Spitzer/IRAC sources in the EGS I. SEDs (Barro+, 2011) J/ApJ/728/38 : AEGIS: demographics of X-ray and optical AGN (Yan+, 2011) J/ApJ/717/1181 : Spitzer power-law galaxies in EGS (Park+, 2010) J/ApJS/180/102 : AEGIS-X: Chandra deep survey (Laird+, 2009) J/ApJ/654/115 : DEEP2 Galaxy Redshift Survey: SDSS QSOs (Coil+, 2007) J/MNRAS/377/806 : Tully-Fisher relation of DEEP2 galaxies (Chiu+, 2007) J/ApJ/625/6 : Galaxy groups in the DEEP2 GRS (Gerke+, 2005) http://deep.ps.uci.edu/ : DEEP2 Redshift Survey web page Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1 I1 --- F [1/4] XDEEP2 Field number 3- 7 I5 --- ObsID Chandra observation identification number (1) 9- 15 A7 --- sField Sub-Field ID (EGS-N or AEGIS-N) (2) 17- 21 A5 --- sField2 Other sub-Field ID (EGS-N) (2) 23- 32 A10 "YYYY/MM/DD" Obs.date Observing date (UT) 34- 41 A8 "h:m:s" Obs.time Observing start time (UT) 43- 47 F5.2 ks Exp Exposure time after appropriate screening 49- 57 F9.5 deg RAdeg Right ascension in decimal degrees (J2000) 59- 66 F8.5 deg DEdeg Declination in decimal degrees (J2000) 68- 73 F6.2 deg Roll Spacecraft roll angle in the standard north-east coordinate system 75- 80 A6 --- Mode Chandra observing mode (FAINT or VFAINT)
Note (1): Due to missing gain files within the CALDB, ObsID 6221 is not included in the analyses of Field 1 which are presented here. The exposure time of 6221 is only 4.15ks, hence, its rejection is relatively insignificant compared to the total exposure time within Field 1 and will have a negligible effect on our conclusions. Note (2): Sub-field name for observations in Field 1, adopted from Laird et al. (2009, Cat. J/ApJS/180/102).
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 9 A9 --- Name Unique XDEEP2 source identifier (FN_NNNN, aegN_NNNN or egsN_NNNN) 11- 17 A7 --- Obs DEEP2 ObsID/sub-field 19- 21 A3 --- --- [CXO] 23- 38 A16 --- CXO Chandra source catalog ID (JHHMMSS.s+DDMMSS) (1) 40- 48 F9.5 deg RAdeg Right Ascension in decimal degrees (J2000) (2) 50- 57 F8.5 deg DEdeg Declination in decimal degrees (J2000) (2) 59- 62 F4.2 arcsec ePos [0.02/4.1] Centroid positional error 64- 67 F4.2 arcsec R50 Radius at 50% ACIS-I effective area (3) 69- 73 F5.2 arcsec R90 Radius at 90% ACIS-I effective area (3) 75- 80 F6.2 arcsec DOA Off-axis distance (4) 82- 88 F7.2 ct S50 Net soft (0.5-2keV) counts in R50 89 A1 --- l_S50 [u] u: 3σ upper-limit 90- 94 F5.2 ct e_S50 ? Uncertainty in S50 96-102 F7.2 ct S90 Net soft (0.5-2keV) counts in R90 103 A1 --- l_S90 [u] u: 3σ upper-limit 104-108 F5.2 ct e_S90 ? Uncertainty in S90 110-116 F7.2 ct H50 Net hard (2-7keV) counts in R50 117 A1 --- l_H50 [u] u: 3σ upper-limit 118-122 F5.2 ct e_H50 ? Uncertainty in H50 124-130 F7.2 ct H90 Net hard (2-7keV) counts in R90 131 A1 --- l_H90 [u] u: 3σ upper-limit 132-136 F5.2 ct e_H90 ? Uncertainty in H90 138-144 F7.2 ct F50 Net full (0.5-7keV) counts in R50 145 A1 --- l_F50 [u] u: 3σ upper-limit 146-150 F5.2 ct e_F50 ? Uncertainty in F50 152-159 F8.2 ct F90 Net full (0.5-7keV) counts in R90 161-166 F6.2 ct e_F90 ?=-1 Uncertainty in F90 168-176 E9.2 mW/m2 SF Soft (0.5-2keV) flux; erg/s/cm2 178-186 E9.2 mW/m2 e_SF ?=-1 Uncertainty in SF 188-196 E9.2 mW/m2 HF Hard (2-7keV) flux; erg/s/cm2 198-206 E9.2 mW/m2 e_HF ?=-1 Uncertainty in HF 208-216 E9.2 mW/m2 FF Full (0.5-7keV) flux; erg/s/cm2 217 A1 --- l_FF [u] u: 3σ upper-limit 218-226 E9.2 mW/m2 e_FF ? Uncertainty in FF 228-232 F5.2 --- HR Hardness ratio; (H-S)/(H+S) 234-238 F5.2 --- b_HR Lower 1σ limit uncertainty in HR 240-244 F5.2 --- B_HR Upper 1σ limit uncertainty in HR 246-253 F8.2 --- FR Flux ratio; HF/SF 255-260 F6.2 --- e_FR ?=-1 Lower 1σ limit uncertainty in FR 262-271 F10.2 --- E_FR ?=-1 Upper 1σ limit uncertainty in FR
Note (1): For matched XDEEP2 sources in the Chandra X-ray source catalog (CSC; Evans et al. 2010ApJS..189...37E). Note (2): Of X-ray position. Note (3): Given the off-axis distance of the X-ray source. Note (4): Of X-ray source from aim-point of observations.
Byte-by-byte Description of file: table7.dat
Bytes Format Units Label Explanations
1- 9 A9 --- Name Unique XDEEP2 source identifier (FN_NNNN, aegN_NNNN or egsN_NNNN) 11 I1 --- F [1/4] DEEP2 ObsID/sub-field 13- 21 F9.5 deg RAdeg X-ray Right Ascension in decimal degrees (J2000) 23- 30 F8.5 deg DEdeg X-ray Declination in decimal degrees (J2000) 32- 39 I8 --- DEEP2 [11006189/43057031]? DEEP2 optical source number (Coil et al. 2004ApJ...617..765C, Cat. II/301, <DEEP2-GRS NNNNNNNN> in Simbad) 41- 49 F9.5 deg RAOdeg ? Optical Right Ascension in decimal degrees (J2000) 51- 58 F8.5 deg DEOdeg ? Optical Declination in decimal degrees (J2000) 60- 63 F4.2 arcsec dOX ? Angular separation between optical and X-ray 65- 71 F7.4 --- z ? Optical counterpart redshift 73- 77 F5.2 % Pgal [-2/3]? Probability of being a galaxy (5) 80- 84 F5.2 mag Bmag ? B band AB magnitude 86- 90 F5.2 mag Rmag ? R band AB magnitude 92- 96 F5.2 mag Imag ? I band AB magnitude
Note (5): Bayesian probability of being a galaxy based on R-band image: * a value between 0 and 1 gives the probability that a compact object is a galaxy (see Coil et al. 2004ApJ...617..765C) * a value ≤0 indicates a star or compact object; * a value ≥1 indicates an extended source and definitely a galaxy.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 17-Oct-2012
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