Chandra localization of XTE J1906+ 090 and discovery of its optical and infrared counterparts

Abstract:

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 RA= 19 h 04 m 47 fs 491, decl.=+ 09 02'41 farcs 40. 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 …

Año de publicación:

2005

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