Correlated variability in LMC X-2

Details Correlated variability in LMC X-2 Correlated variability in LMC X-2

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..599..766m&link_type=abstract

X-RAY ASTRONOMY: Stellar Endpoints,AGN, and the Diffuse X-ray Background. Edited by Nicholas E. White, Giuseppe Malaguti, and G

Astronomy and Astrophysics

Astronomy

1

Spectroscopic Binaries, Close Binaries, X-Ray Sources, X-Ray Bursts, Photometric, Polarimetric, And Spectroscopic Instrumentation, X-Ray Binaries

Scientific paper

We report simultaneous X-ray and optical photometry of LMC X-2, to search for correlated variability on timescales from seconds to hours. Our results show evidence for a lag between the X-ray and optical variations of ~6-16 s. Given the likely binary size this suggests that the X-ray reprocessing time is not instantaneous, but has a finite time added, possibly due to the (poorly understood) interaction with the disc's ``atmosphere''. These data are compared with similar archival studies of Sco X-1. .

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