BL Lac identification for the ultraluminous X-ray source observed in the direction of NGC 4698

被引：21

作者：

Foschini, L

Ho, LC

Masetti, N

Cappi, M

Dadina, M

Bassani, L

Malaguti, G

Palazzi, E

Di Cocco, G

Martini, P

Ravindranath, S

Stephen, JB

Trifoglio, M

Gianotti, F

机构：

[1] CNR, IASF, Ist Astrofis Spaziale & Fis Cosm, Sez Bologna, I-40129 Bologna, Italy

[2] Carnegie Inst Washington Observ, Pasadena, CA 91101 USA

[3] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

来源：

ASTRONOMY & ASTROPHYSICS | 2002年 / 396卷 / 03期

关键词：

galaxies : active; galaxies : Seyfert; galaxies : BL Lacertae objects : general;

D O I：

10.1051/0004-6361:20021391

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the identification of the optical and radio counterparts of the ultraluminous X-ray (ULX) source XMMU J124825.9+083020 (NGC 4698-ULX1). The optical spectrum taken with the VLT yields a redshift of z = 0.43, which implies that the ULX is not associated with the nearby galaxy NGC 4698. The spectral energy distribution calculated from the available data indicates that the source is likely to be a BL Lac object. The possible synchrotron peak at X-ray energies suggests that this source may be a gamma-ray emitter.

引用

页码：787 / 792

页数：6

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