Astrophys. J., Suppl. Ser., 202, 6 (2012/September-0)
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. and NEWMAN J.A.
Abstract (from CDS):
We present the X-ray point-source catalog produced from the Chandra Advanced CCD Imaging Spectrometer (ACIS-I) observations of the combined ∼3.2 deg2 DEEP2 (XDEEP2) survey fields, which consist of four ∼0.7-1.1 deg2 fields. The combined total exposures across all four XDEEP2 fields range from ∼10 ks to 1.1 Ms. 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%). We present the combined log N-log S distribution of sources detected across the XDEEP2 survey fields and find good agreement with the Extended Chandra Deep Field and Chandra-COSMOS fields to fx,0.5 - 2 KeV ∼ 2 x 10–16 erg/cm2/s. Given the large survey area of XDEEP2, we additionally place relatively strong constraints on the log N-log S distribution at high fluxes (fx,0.5 - 2 KeV ∼ 3 x 10–14 erg/cm2/s), and find a small systematic offset (a factor ∼1.5) toward lower source numbers in this regime, when compared to smaller area surveys. The number counts observed in XDEEP2 are in close agreement with those predicted by X-ray background synthesis models. 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.
galaxies: active - surveys - X-rays: galaxies
VizieR on-line data:
<Available at CDS (J/ApJS/202/6): table2.dat table5.dat table7.dat>
Tables 5-7: XDEEP2 aegN-NNNN (Nos aeg1-0001 to aeg1-0354, aeg2-0001 to aeg2-0260, aeg3-0001 to aeg3-0283), XDEEP2 egsN-NNNN (Nos egs1-0001 to egs1-0184, egs2-0001 to egs2-0158, egs6-0001 to egs6-0166, egs7-0001 to egs7-0179, egs8-0001 to egs8-0134), XDEEP2 FN-NNNN (Nos F2-0001 to F2-0342, F3-0001 to F3-0528, F4-0001 to F4-0386).
View the reference in ADS