SIGMA-OBSERVATIONS OF THE BRIGHT X-RAY TRANSIENT NOVA PERSEI - A NEW BLACK-HOLE CANDIDATE

Authors
ROQUES JP BOUCHET L JOURDAIN E MANDROU P GOLDWURM A BALLET J CLARET A LEBRUN F FINOGUENOV A CHURAZOV E GILFANOV M SUNYAEV R NOVIKOV B CHULKOV I KULESHOVA N TSERENIN I
Citation
Jp. Roques et al., SIGMA-OBSERVATIONS OF THE BRIGHT X-RAY TRANSIENT NOVA PERSEI - A NEW BLACK-HOLE CANDIDATE, The Astrophysical journal. Supplement series, 92(2), 1994, pp. 451-454
Citations number
32
Categorie Soggetti
Astronomy & Astrophysics
Journal title
The Astrophysical journal. Supplement series → ACNP
ISSN journal
00670049
Volume
92
Issue
2
Year of publication
1994
Pages
451 - 454
Database
ISI
SICI code
0067-0049(1994)92:2<451:SOTBXT>2.0.ZU;2-5
Abstract
Nova Persei (GRO J0422+32 = GRS 0418+328) has been observed by the SIG MA telescope (35-1300 keV) between 1992 August 15 and September 25 and is located at R.A. (1950) = 04 h 18 m 28.6s, decl. (1950) = 32-degree s-47' 20''. This source can be classified as a X-ray transient. It was found to be extremely bright (3 Crab in the 35-200 keV band) and to h ave a hard spectrum (photon power-law index of about 2) extending up t o 600 keV. Quasiperiodic oscillations have been detected around 0.03 a nd 0.3 Hz (Kouveliotou et al. 1992; Vikhlinin et al. 1992b). The behav ior of this object in the high-energy domain leads us to consider it a s a new black hole candidate.