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

Abstract

We present a routinized and reliable method to obtain source catalogs from the Nuclear Spectroscopic Telescope Array (<i>NuSTAR</i>) extragalactic surveys of the Extended <i>Chandra</i> Deep Field-South (E-CDF-S) and <i>Chandra</i> Deep Field-North (CDF-N). The <i>NuSTAR</i> E-CDF-S survey covers a sky area of <inline-formula><tex-math id="M1">\begin{document}$\sim30'\times30'$\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="JUSTC-2023-0032_M1.jpg"/><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="JUSTC-2023-0032_M1.png"/></alternatives></inline-formula> to a maximum depth of <inline-formula><tex-math id="Z-20230704083543">\begin{document}$\sim230\;{\rm{ks}}$\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="JUSTC-2023-0032_Z-20230704083543.jpg"/><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="JUSTC-2023-0032_Z-20230704083543.png"/></alternatives></inline-formula> corrected for vignetting in the 3–24 keV band, with a total of 58 sources detected in our E-CDF-S catalog; the <i>NuSTAR</i> CDF-N survey covers a sky area of <inline-formula><tex-math id="M3">\begin{document}$\sim7'\times10'$\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="JUSTC-2023-0032_M3.jpg"/><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="JUSTC-2023-0032_M3.png"/></alternatives></inline-formula> to a maximum depth of <inline-formula><tex-math id="Z-20230704083612">\begin{document}$\sim440\;{\rm{ks}}$\end{document}</tex-math><alternatives><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="JUSTC-2023-0032_Z-20230704083612.jpg"/><graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="JUSTC-2023-0032_Z-20230704083612.png"/></alternatives></inline-formula> 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 <i>Chandra</i> X-ray observatory and find that the fluxes of our <i>NuSTAR</i> sources are generally consistent with those of their <i>Chandra</i> 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 <i>NuSTAR</i> extragalactic surveys.