Soft-to-Hard State Transitions in LMC X-3

Details Soft-to-Hard State Transitions in LMC X-3 Soft-to-Hard State Transitions in LMC X-3

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000head....5.3507w&link_type=abstract

American Astronomical Society, HEAD Meeting #5, #35.07; Bulletin of the American Astronomical Society, Vol. 32, p.1247

Astronomy and Astrophysics

Astronomy

Scientific paper

RXTE monitoring of the canonical soft state black hole candidate LMC X-3 during 1997 and 1998 revealed the presence of transitions to the hard state (Wilms et al., 2000, MNRAS, in press, astro-ph/0005489). The hardening reoccurs on a timescale of (roughly) 150d, although pure hard states are rarer. We present results of the analysis of all available RXTE data of LMC X-3 (taken from 1997 through 1999) using thermal and non-thermal Comptonization models, focusing on the properties of the state transitions and the soft state. We compare these data to those from LMC X-1, the only soft state source which has only been seen during the soft state, and discuss the possible cause for the state transitions. The hard states of LMC X-3 itself are the subject of an accompanying contribution by Boyd et al. This research was funded by NASA grants NAG5-3225, NAG5-4621, NAG5-4737, NSF grants AST95-29170, AST98-76887, DFG grant Sta 173/22, and a travel grant by the DAAD.

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