HEAD Division Meeting 1999, April 1999
Session 28. Black Holes
Poster, Wednesday, April 14, 1999, 8:30am Wed. - 2:00pm Thurs., Gold Room

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[28.11] The strange X-ray light curves of GRS1915+105

E.H. Morgan, R. Remillard, M. Muno, K. Kitzgibbons (MIT)

RXTE has observed the galactic Black Hole candidate GRS1915+105 more than 300 times over the last 3 years. The X-ray light curves have shown dramatic, complex patterns of variability. These bizarre patterns may repeat tens to hundreds of times on time scales from days to a few weeks, and then the pattern may recur again months or years later in a strikingly similar fashion. We present a complete sample of the types of variability seen to date. We discuss the relation of the variability type with the radio flux, QPO properties and the parameters from the disk and power law components of the X-ray spectrum.

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