The Nature of an Unidentified X-ray Source in the 7 Ms Chandra Deep Field-South Catalog
Quinn P. Sullivan, Zhibo Yu, William N. Brandt, Bin Luo, and Fan Zou

TL;DR
This study investigates an enigmatic X-ray source in the Chandra Deep Field-South, using multiwavelength data and SED fitting to determine its nature as an off-nuclear ultraluminous X-ray source rather than a background AGN.
Contribution
It presents the first detailed multiwavelength analysis of a highly significant but previously unidentified X-ray source in this deep field.
Findings
The source is likely an off-nuclear ultraluminous X-ray source.
It is not consistent with a background active galactic nucleus.
Multiwavelength data helped identify its nature.
Abstract
In the 7 Ms Chandra Deep Field-South catalog, only one source, XID 912, was highly significantly detected in X-rays but had no formally reported counterparts in the UV, optical, infrared, or radio bands. We identified its potential JWST and VLT VIMOS counterparts and measured the corresponding aperture photometry to construct its spectral energy distribution (SED). We fitted this SED using CIGALE. The results indicate that the source is most likely an off-nuclear ultraluminous X-ray source, rather than a background active galactic nucleus.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsAstrophysical Phenomena and Observations · Galaxies: Formation, Evolution, Phenomena · Astrophysics and Cosmic Phenomena
