FAST OPTICAL VARIABILITY OF GRO J0422+32

被引:10
作者
BARTOLINI, C [1 ]
GUARNIERI, A [1 ]
PICCIONI, A [1 ]
BESKIN, GM [1 ]
NEIZVESTNY, SI [1 ]
机构
[1] SPECIAL ASTROPHYS OBSERV,ST PETERSBURG,RUSSIA
关键词
GAMMA RAYS; OBSERVATIONS; NOVAE; CATACLYSMIC VARIABLES; STARS; INDIVIDUAL (NOVA PERSEI 1992); X-RAYS;
D O I
10.1086/191995
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present spectroscopic and photoelectric optical observations of the X-ray nova GRO J0422+32 = Nova Persei 1992 obtained with a TV spectrum scanner, UBVR photometer and soft/hardware MANIA complex on the Special Astrophysical Observatory 6 m telescope and with a fast double-head photometer at the Bologna Observatory. In the early phase after discovery the spectrum of the object presented a variable continuum with intensity rising blueward and some weak emissions (H, He, N). Photoelectric data show a modulation on a time scale of about 5 hours and stochastic flashes, probably of nonthermal origin, on a timescale from 10-20 ms to 200 s. A unique episode of fading of the object was observed on JD 2448986.52.
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收藏
页码:455 / 458
页数:4
相关论文
共 17 条
[1]  
BESKIN GM, 1981, IAU C, V67, P181
[2]  
BORTLE JE, 1993, IAU5701 CIRC
[3]   THE SECONDARY MAXIMA IN BLACK-HOLE X-RAY NOVA LIGHT CURVES - CLUES TOWARD A COMPLETE PICTURE [J].
CHEN, W ;
LIVIO, M ;
GEHRELS, N .
ASTROPHYSICAL JOURNAL, 1993, 408 (01) :L5-L8
[4]  
CHEVALIER C, 1993, IAU5692 CIRC
[5]  
CSTROTIRADO AJ, 1992, IAU5588 CIRC
[6]  
KATO S, 1992, IAU5676 CIRC
[7]  
MERLIN JC, 1993, IAU5690 CIRC
[8]  
MERLIN JC, 1993, IAU5701 CIRC
[9]  
PACIESAS WS, 1992, IAU5580 CIRC
[10]  
Piccioni A., 1979, Acta Astronomica, V29, P463