IGR J17544-2619 in depth with Suzaku: direct evidence for clumpy winds in a supergiant fast X-ray transient

Details IGR J17544-2619 in depth with Suzaku: direct evidence for clumpy winds in a supergiant fast X-ray transient IGR J17544-2619 in depth with Suzaku: direct evidence for clumpy winds in a supergiant fast X-ray transient

2009-04-07

arxiv.org/abs/0904.1189v3

Astrophys.J.707:243-249,2009

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

14 pages, 8 figures, accepted for The Astrophysical Journal. Version 3 includes minor changes made during the refereeing proce

Scientific paper

10.1088/0004-637X/707/1/243

We present the first direct evidence for dense clumps of matter in the companion wind in a Supergiant Fast X-ray Transient (SFXT) binary. This is seen as a brief period of enhanced absorption during one of the bright, fast flares that distinguish these systems. The object under study was IGR J17544-2619, and a total of 236 ks of data were accumulated with the Japanese satellite Suzaku. The activity in this period spans a dynamic range of almost 10000 in luminosity and gives a detailed look at SFXT behavior.

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