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Open AccessOpen Access JUSTC Astronomy 30 March 2023

The NuSTAR extragalactic surveys: Source catalogs from the Extended Chandra Deep Field-South and the Chandra Deep Field-North

  • 1.

    CAS Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China, Hefei 230026, China

  • 2.

    School of Astronomy and Space Sciences, University of Science and Technology of China, Hefei 230026, China

Cite this:
https://doi.org/10.52396/JUSTC-2023-0032
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  • Author Bio:

    Tianyi Zhang is a graduate student under the supervision of Professor Yongquan Xue at University of Science and Technology of China. His research is focused on active galactic nuclei

    Yongquan Xue is currently a Professor at University of Science and Technology of China. He received his Ph.D. degree from Purdue University. His research interests mainly focus on active galactic nuclei and high-energy astrophysics

  • Corresponding author: E-mail: zty123@mail.ustc.edu.cn; E-mail: xuey@ustc.edu.cn
  • Received Date: 06 March 2023
  • Accepted Date: 13 March 2023
    • Available Online: 30 March 2023
    Abstract

  • Abstract

    We present a routinized and reliable method to obtain source catalogs from the Nuclear Spectroscopic Telescope Array (NuSTAR) extragalactic surveys of the Extended Chandra Deep Field-South (E-CDF-S) and Chandra Deep Field-North (CDF-N). The NuSTAR E-CDF-S survey covers a sky area of $\sim30'\times30'$ to a maximum depth of $\sim230\;{\rm{ks}}$ corrected for vignetting in the 3–24 keV band, with a total of 58 sources detected in our E-CDF-S catalog; the NuSTAR CDF-N survey covers a sky area of $\sim7'\times10'$ to a maximum depth of $\sim440\;{\rm{ks}}$ corrected for vignetting in the 3–24 keV band, with a total of 42 sources detected in our CDF-N catalog that is produced for the first time. We verify the reliability of our two catalogs by crossmatching them with the relevant catalogs from the Chandra X-ray observatory and find that the fluxes of our NuSTAR sources are generally consistent with those of their Chandra counterparts. Our two catalogs are produced following the exact same method and made publicly available, thereby providing a uniform platform that facilitates further studies involving these two fields. Our source-detection method provides a systematic approach for source cataloging in other NuSTAR extragalactic surveys.

    Graphical abstract

    Stacked NuSTAR E-CDF-S and CDF-N science mosaics in the 3–24 keV band.

    Abstract

    We present a routinized and reliable method to obtain source catalogs from the Nuclear Spectroscopic Telescope Array (NuSTAR) extragalactic surveys of the Extended Chandra Deep Field-South (E-CDF-S) and Chandra Deep Field-North (CDF-N). The NuSTAR E-CDF-S survey covers a sky area of $\sim30'\times30'$ to a maximum depth of $\sim230\;{\rm{ks}}$ corrected for vignetting in the 3–24 keV band, with a total of 58 sources detected in our E-CDF-S catalog; the NuSTAR CDF-N survey covers a sky area of $\sim7'\times10'$ to a maximum depth of $\sim440\;{\rm{ks}}$ corrected for vignetting in the 3–24 keV band, with a total of 42 sources detected in our CDF-N catalog that is produced for the first time. We verify the reliability of our two catalogs by crossmatching them with the relevant catalogs from the Chandra X-ray observatory and find that the fluxes of our NuSTAR sources are generally consistent with those of their Chandra counterparts. Our two catalogs are produced following the exact same method and made publicly available, thereby providing a uniform platform that facilitates further studies involving these two fields. Our source-detection method provides a systematic approach for source cataloging in other NuSTAR extragalactic surveys.

    • Public Summary

    • We present a routinized and reliable method to obtain source catalogs from the nuclear spectroscopic telescope array (NuSTAR) extragalactic surveys of the Extended Chandra Deep Field-South (E-CDF-S) and Chandra Deep Field-North (CDF-N).
    • There are 58 and 42 sources in our NuSTAR E-CDF-S and CDF-N catalogs, respectively, with the CDF-N catalog being produced for the first time.
    • We make our E-CDF-S and CDF-N catalogs publicly available, thereby providing a uniform platform that facilitates further studies involving these two fields.

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    Figure  1.  Stacked NuSTAR E-CDF-S science mosaic in the full band, with a total of 58 sources plotted as circles. The green (47/58) and red (4/58; being less significant detections) sources have the Chandra 250 ks E-CDF-S counterparts within $ r_{\rm m}=30'' $. The magenta source (1/58) does not have any Chandra 250 ks E-CDF-S counterparts but can be matched to a Chandra 7 Ms CDF-S source. Am