Re-Identification of the `Enigmatic' X-ray Source 1RXS J114003.0+124112

Details Re-Identification of the `Enigmatic' X-ray Source 1RXS J114003.0+124112 Re-Identification of the `Enigmatic' X-ray Source 1RXS J114003.0+124112

2006-02-21

arxiv.org/abs/astro-ph/0602454v1

Chin.J.Astron.Astrophys. 6 (2006) 430-434

Astronomy and Astrophysics

Astrophysics

7 pages, 3 figures, to be published in ChJAA

Scientific paper

10.1088/1009-9271/6/4/05

The ROSAT X-ray source 1RXS J114003.0+124112 was identified as a starburst galaxy at redshift 0.177 by He et al. (2001). Meanwhile, the authors also noted that the source is almost two orders of magnitude brighter in X-ray than the X-ray-brightest starburst galaxy and it seems to be in a merging system, making this source an enigmatic system for further observations. This paper reports the re-identification of 1RXS J114003.0+124112 with the observations on the 2.6 m telescope at Byurakan Astrophysical Observatory, Armenia and with the SDSS data. The results indicate that the starburst activity is associated with the brighter object in the system, while the fainter object is a typical Seyfert 1 galaxy at redshift 0.282. Therefore, the two objects are not in a merging system, and the Seyfert 1 galaxy naturally accounts for the high X-ray flux. Three more objects reside in the vicinity, but they are all too faint to be responsible for the high X-ray flux.

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