Skip to main content

Research Repository

Advanced Search

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.

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


Authors

Y.Q. Xue

B. Luo

W.N. Brandt

F.E. Bauer

B.D. Lehmer

G. Yang



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 Mar 29, 2024
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

Files

Published Journal Article (10 Mb)
PDF

Copyright Statement
© 2016. The American Astronomical Society. All rights reserved.





You might also like



Downloadable Citations