THE 2 Ms CHANDRA DEEP FIELD-NORTH SURVEY AND THE 250 Ks EXTENDED CHANDRA DEEP FIELD-SOUTH SURVEY: IMPROVED POINT-SOURCE CATALOGS
نویسندگان
چکیده
منابع مشابه
The Chandra Deep Field-south Survey: 2 Ms Source Catalogs
We present point-source catalogs for the ≈ 2 Ms exposure of the Chandra Deep Field-South (CDF-S); this is one of the two most-sensitive X-ray surveys ever performed. The survey covers an area of ≈ 436 arcmin2 and reaches on-axis sensitivity limits of ≈ 1.9× 10−17 and ≈ 1.3× 10−16 ergs cm−2 s−1 for the 0.5–2.0 and 2–8 keV bands, respectively. Four hundred and sixty-two X-ray point sources are de...
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We present X-ray spectral analyses of the three z > 4 Active Galactic Nuclei (AGNs) thus far spectroscopically identified in the Chandra Deep Field-North Survey, at redshifts of 5.186, 4.424, and 4.137. These analyses are made possible by the extremely deep exposure (≈ 2 Ms) and the low Chandra background. The rest-frame ≈ 2.5–40 keV spectra are the first for optically faint (two of the three s...
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The Extended Chandra Deep Field-South (ECDFS) survey consists of 4 Chandra ACIS-I pointings and covers ≈ 1100 square arcminutes (≈ 0.3 deg) centered on the original CDF-S field to a depth of approximately 228 ks. This is the largest Chandra survey ever conducted at such depth, and only one XMMNewton survey reaches a lower flux limit in the hard 2.0–8.0 keV band. We detect 651 unique sources — 5...
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Understanding the nature of Extremely Red Objects [EROs; (I − K)≥4] is one of the most challenging issues in observational cosmology. Here we report on the X-ray constraints provided by the 2 Ms Chandra Deep Field-North Survey (CDF-N). X-ray emission has been detected from 11 out of 36 EROs (≈ 30%). Five of these have hard X-ray emission and appear to be obscured AGNs, while non-AGN emission (s...
متن کاملResolving the Source Populations that Contribute to the X-ray Background: The 2 Ms Chandra Deep Field-North Survey
With ≈ 2 Ms of Chandra exposure, the Chandra Deep Field-North (CDF-N) survey provides the deepest view of the Universe in the 0.5–8.0 keV band. Five hundred and three (503) X-ray sources are detected down to on-axis 0.5–2.0 keV and 2–8 keV flux limits of ≈ 1.5 × 10 erg cm s and ≈ 1.0 × 10 erg cm s, respectively. These flux limits correspond to L0.5−8.0 keV ≈ 3 × 10 erg s at z = 1 and L0.5−8.0 k...
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ژورنال
عنوان ژورنال: The Astrophysical Journal Supplement Series
سال: 2016
ISSN: 1538-4365
DOI: 10.3847/0067-0049/224/2/15