Capitanio, Fiamma

The behavior of the BHC 4U1630-472 during the 2006-2010 outbursts.

Author list: Capitanio F., Campana R., De Cesare G. et al.

4U1630-472 is a recurrent X-ray transient classified as a BHC from its spectral and timing properties. One of the peculiarity of this source is the presence of regular outbursts with a period that spans from 600 until about 700 days.  We present here the analysis of the data collected by INTEGRAL and RXTE during three consecutive outbursts. In particular we focus on the differences and similarities of their spectral and timing properties. Moreover we speculate on the nature of the regular outbursts that the source have shown since its discovery in 1969.