Chandra localization of XTE J1906+090 and discovery of its optical and infrared counterparts
Göğüş, Ersin and Patel, Sandeep K. and Wilson, Colleen A. and Woods, Peter M. and Finger, Mark H. and Kouveliotou, Chryssa (2005) Chandra localization of XTE J1906+090 and discovery of its optical and infrared counterparts. Astrophysical Journal, 632 (issue 2 part1 ). pp. 1069-1074. ISSN 0004-637X
We present the Chandra identification and localization of the transient X-ray source XTE J1906+090 and the discovery of its optical and infrared counterparts. Our analysis of archival Chandra ACIS-I observations of the field found the source approximately 8 away from the position determined earlier with the RXTE PCA. We have confirmed the source identification with timing analysis of the X-ray data, which detected the source spin period of 89.6 s. The best Chandra position for the source is R.A. = 19h04m47491, decl. = +09024140. Subsequently, we performed optical observations of the field around the new location and discovered a coincident optical source with R-band magnitude of 18.7. A search in the Two Micron All Sky Survey catalog revealed an infrared point source with J = 15.2, H = 14.2, and K = 13.5, whose location is also coincident with our Chandra and optical positions. Our results add fresh evidence for a Be/X-ray transient nature for XTE J1906+090.
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