Erratic variability of LMC X-1 in the 1.5-10 keV range. Sporadic presence of a QPO in a black hole candidate

Details Erratic variability of LMC X-1 in the 1.5-10 keV range. Sporadic presence of a QPO in a black hole candidate Erratic variability of LMC X-1 in the 1.5-10 keV range. Sporadic presence of a QPO in a black hole candidate

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..599..594f&link_type=abstract

X-RAY ASTRONOMY: Stellar Endpoints,AGN, and the Diffuse X-ray Background. AIP Conference Proceedings, Volume 599, pp. 594-597 (

Astronomy and Astrophysics

Astronomy

1

X-Ray Binaries, Black Holes, X-Ray Sources, X-Ray Bursts

Scientific paper

We observed LMC X-1 on October 5-6 1997 with BeppoSAX. The analysis of erratic variability yielded a power-law red noise with frequency index α=0.86+/-0.05. Marginal evidence of a QPO centered at 0.075+/-0.007 Hz, with a power corresponding to 5+/-2.2% was found. These results are in good agreement with those from GINGA 1987 measurements (Ebisawa et al. 1989). Recently Schmidtke et al. (1999) failed to detect QPOs in 9 observations performed in 1996 with RXTE. The presence of QPOs in the power spectrum of LMC X-1 appears sporadic. .

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