出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The X-ray transient 4U1630-47 shows regular outbursts with a recurrence period of 600 days
since its first detection by Vela-5B in 1969. RXTE/ASM monitor reveals heightened activity
during 2002 - 2004 and in beginning of 2006. During these periods, the RXTE/PCA observed
the source when it was in different stages of the outburst. Detailed spectral and timing analysis
had been carried out with the data. Spectral analysis showed the presence of high temperature
states as they were reported by Tomsick et al (2005). Detailed timing analysis presented in this
work revealed that the quasi-periodic oscillations (QPOs) are present only in the high temperature
states. The variation of inner disk radius with inner disk temperature for high temperature
states shows a distinct pattern in Tin −Rin plane as compared to the one expected from a standard
Shakura-Sunyaev disk. This may possibly indicate the presence of a slim disk.
