The first optical validation of an XLEO: a detection in the XMM-Newton observation of the CDFS

Abstract

We present the first optical validation of an X-ray Line-Emitting Object (XLEO) discovered in the XMM-Newton observation of the Chandra Deep Field South. The object is an AGN at z_x ~ 0.66. An optical spectrum of the source indeed confirms and refines (z_o = 0.665) the redshift obtained from the X-ray line. The X-ray and optical properties of the source are presented and discussed.

arXiv comment13 pages, 3 figures. Accepted for publication by ApJL

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Cited by in corpus (8)

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• X-ray redshifts for obscured AGN: a case study in the J1030 deep field
• Unobscured QSO2: A New Class of Objects?
• 4C 39.29 - extended emission around a powerful Type 2 quasar
• An X-ray bright ERO hosting a type 2 QSO
• X-Ray Redshifts of Obscured Chandra Source Catalog AGN