The 2 Ms Chandra Deep Field-North Survey and the 250 ks Extended Chandra Deep Field-South Survey: Improved Point-Source Catalogs

Xue, Y.Q.; Luo, B.; Brandt, W.N.; Alexander, D.M.; Bauer, F.E.; Lehmer, B.D.; Yang, G.

Abstract

Abstract We present improved point-source catalogs for the 2 Ms Chandra Deep Field-North (CDF-N) and the 250 ks Extended Chandra Deep Field-South (E-CDF-S) Surveys, implementing a number of recent improvements in Chandra source-cataloging methodology. For CDF-N/E-CDF-S, we provide a main catalog that contains 683/1003 X-ray sources detected with wavdetect at a false-positive probability threshold of 10−5 that also satisfy a binomial-probability source-selection criterion of $P\lt 0.004$/P < 0.002. Such an approach maximizes the number of reliable sources detected: a total of 196/275 main-catalog sources are new compared to the Alexander et al. CDF-N/Lehmer et al. E-CDF-S main catalogs. We also provide CDF-N/E-CDF-S supplementary catalogs that consist of 72/56 sources detected at the same wavdetect threshold and having P of 0.004–0.1/0.002–0.1 and ${K}_{s}\leqslant 22.9/{K}_{s}\leqslant 22.3$ mag counterparts. For all $\approx 1800$ CDF-N and E-CDF-S sources, including the $\approx 500$ newly detected ones (these being generally fainter and more obscured), we determine X-ray source positions utilizing centroid and matched-filter techniques; we also provide multiwavelength identifications, apparent magnitudes of counterparts, spectroscopic and/or photometric redshifts, basic source classifications, and estimates of observed active galactic nucleus and galaxy source densities around respective field centers. Simulations show that both the CDF-N and E-CDF-S main catalogs are highly reliable and reasonably complete. Background and sensitivity analyses indicate that the on-axis mean flux limits reached represent a factor of $\approx 1.5$–2.0 improvement over the previous CDF-N and E-CDF-S limits. We make our data products publicly available.

Citation

Xue, Y., Luo, B., Brandt, W., Alexander, D., Bauer, F., Lehmer, B., & Yang, G. (2016). The 2 Ms Chandra Deep Field-North Survey and the 250 ks Extended Chandra Deep Field-South Survey: Improved Point-Source Catalogs. Astrophysical Journal Supplement, 224(2), Article 15. https://doi.org/10.3847/0067-0049/224/2/15

• Journal Article Type: Article
• Acceptance Date: Feb 17, 2016
• Online Publication Date: May 26, 2016
• Publication Date: May 26, 2016
• Deposit Date: Jun 21, 2017
• Publicly Available Date: Jul 3, 2017
• Journal: Astrophysical Journal Supplement
• Print ISSN: 0067-0049
• Electronic ISSN: 1538-4365
• Publisher: American Astronomical Society
• Peer Reviewed: Peer Reviewed
• Volume: 224
• Issue: 2
• Article Number: 15
• DOI: https://doi.org/10.3847/0067-0049/224/2/15
• Public URL: https://durham-repository.worktribe.com/output/1354725