TY - JOUR
T1 - The extended Chandra deep field-south survey
T2 - Chandra point-source catalogs
AU - Lehmer, B. D.
AU - Brandt, W. N.
AU - Alexander, D. M.
AU - Bauer, F. E.
AU - Schneider, D. P.
AU - Tozzi, P.
AU - Bergeron, J.
AU - Garmire, G. P.
AU - Giacconi, R.
AU - Gilli, R.
AU - Hasinger, G.
AU - Hornschemeier, A. E.
AU - Koekemoer, A. M.
AU - Mainieri, V.
AU - Miyaji, T.
AU - Nonino, M.
AU - Rosati, P.
AU - Silverman, J. D.
AU - Szokoly, G.
AU - Vignali, C.
PY - 2005/11
Y1 - 2005/11
N2 - We present Chandra point-source catalogs for the Extended Chandra Deep Field-South (E-CDF-S) survey. The E-CDF-S consists of four contiguous 250 ks Chandra observations covering an approximately square region of total solid angle ≈0.3 deg 2, which flank the existing ≈1 Ms Chandra Deep Field-South (CDF-S). The survey reaches sensitivity limits of ≈1.1 × 10 -16 and ≈6.7 × 10 -16 ergs cm -2 s -1 for the 0.5-2.0 and 2-8 keV bands, respectively. We detect 762 distinct X-ray point sources within the E-CDF-S exposure; 589 of these sources are new (i.e., not previously detected in the ≈1 Ms CDF-S). This brings the total number of X-ray point sources detected in the E-CDF-S region to 915 (via the E-CDF-S and ≈1 Ms CDF-S observations). Source positions are determined using matched-filter and centroiding techniques; the median positional uncertainty is ≈0″.35. The basic X-ray and optical properties of these sources indicate a variety of source types, although absorbed active galactic nuclei (AGNs) seem to dominate. In addition to our main Chandra catalog, we constructed a supplementary source catalog containing 33 lower significance X-ray point sources that have bright optical counterparts (R < 23). These sources generally have X-ray-to-optical flux ratios expected for normal and starburst galaxies, which lack a strong AGN component. We present basic number-count results for our main Chandra catalog and find good agreement with the ≈1 Ms CDF-S for sources with 0.5-2.0 and 2-8 keV fluxes greater than 3 × 10 -16 and 1 × 10 -15 ergs cm -2 s -1, respectively. Furthermore, three extended sources are detected in the 0.5-2.0 keV band, which are found to be likely associated with galaxy groups or poor clusters at z ≈ 0.1-0.7; these have typical rest-frame 0.5-2.0 keV luminosities of (1-5) × 10 42 ergs s -1.
AB - We present Chandra point-source catalogs for the Extended Chandra Deep Field-South (E-CDF-S) survey. The E-CDF-S consists of four contiguous 250 ks Chandra observations covering an approximately square region of total solid angle ≈0.3 deg 2, which flank the existing ≈1 Ms Chandra Deep Field-South (CDF-S). The survey reaches sensitivity limits of ≈1.1 × 10 -16 and ≈6.7 × 10 -16 ergs cm -2 s -1 for the 0.5-2.0 and 2-8 keV bands, respectively. We detect 762 distinct X-ray point sources within the E-CDF-S exposure; 589 of these sources are new (i.e., not previously detected in the ≈1 Ms CDF-S). This brings the total number of X-ray point sources detected in the E-CDF-S region to 915 (via the E-CDF-S and ≈1 Ms CDF-S observations). Source positions are determined using matched-filter and centroiding techniques; the median positional uncertainty is ≈0″.35. The basic X-ray and optical properties of these sources indicate a variety of source types, although absorbed active galactic nuclei (AGNs) seem to dominate. In addition to our main Chandra catalog, we constructed a supplementary source catalog containing 33 lower significance X-ray point sources that have bright optical counterparts (R < 23). These sources generally have X-ray-to-optical flux ratios expected for normal and starburst galaxies, which lack a strong AGN component. We present basic number-count results for our main Chandra catalog and find good agreement with the ≈1 Ms CDF-S for sources with 0.5-2.0 and 2-8 keV fluxes greater than 3 × 10 -16 and 1 × 10 -15 ergs cm -2 s -1, respectively. Furthermore, three extended sources are detected in the 0.5-2.0 keV band, which are found to be likely associated with galaxy groups or poor clusters at z ≈ 0.1-0.7; these have typical rest-frame 0.5-2.0 keV luminosities of (1-5) × 10 42 ergs s -1.
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U2 - 10.1086/444590
DO - 10.1086/444590
M3 - Article
AN - SCOPUS:28444453709
SN - 0067-0049
VL - 161
SP - 21
EP - 40
JO - Astrophysical Journal, Supplement Series
JF - Astrophysical Journal, Supplement Series
IS - 1
ER -