The outbursts era of the microQSO H1743-322

Physics

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Scientific paper

On March 2003 after about 25 years, H 1743322 was observed again in outburst by the INTEGRAL satellite. After this bright outburst the source entered in a new phase showing several more outbursts within a few years. These outbursts had an unusual regularity insomuch as it is even possible to extrapolate two different recurrence periods. This peculiar behaviour has been observed before only in the BH 4U1630-47 until 1998. Moreover some of these outbursts did not follow the state transition sequence expected for a BH X-ray binary. We review here the high energy spectral and temporal evolution ofH1743-322 as seen by INTEGRAL, Swift and RXTE with special attention to differences and similarities between the outbursts and the nature of the their recurrence. Moreover we present some results of a NIR campaign performed during the 2009 outbursts.

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