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

作     者：Jiang-Hua Wu Tigran Movsessian Yang Chen Xiang-Tao He Xu Zhou Jun Ma Jiang-Hua Wu, Tigran Movsessian, Yang Chen, Xiang-Tao He, Xu Zhou and Jun Ma National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012;. Byurakan Astrophysical Observatory, Aragatsotn Prov. 378433, Armenia Department of Astronomy, Beijing Normal University, Beijing 100875

作者机构：National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 Byurakan Astrophysical Observatory Aragatsom Prov. 378433 Armenia Department of Astronomy Beijing Normal University Beijing 100875 

出 版 物：《Chinese Journal of Astronomy and Astrophysics》 (中国天文和天体物理学报（英文版）)

年 卷 期：2006年第6卷第4期

页      面：430-434页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：Supported by the National Natural Science Foundation of China 

主　　题：galaxies: active   galaxies: Seyfert   galaxies: starburst   X rays: individual(1RXS J114003.0+124112) 

摘      要：The ROSAT X-ray source 1RXS J114003.0＋ 124112 was identified as a starburst galaxy at redshift 0.177 by He et al. 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 demanding further observations. Here we report a re-identification of 1RXS J114003.0＋124112 using observations on the 2.6 m telescope at Byurakan Astrophysical Observatory, Armenia and the SDSS data. The results indicate that the starburst activity is associated with the brighter object of the system, while the fainter object is a typical Seyfert 1 galaxy at a different 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.