Optical variability of the ultraluminous X-ray source NGC 1313 X-2

Details Optical variability of the ultraluminous X-ray source NGC 1313 X-2 Optical variability of the ultraluminous X-ray source NGC 1313 X-2

2010-11-09

arxiv.org/abs/1011.2043v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

4 pages, 2 figures. Accepted for publication in the Astronomische Nachrichten (Astronomical Notes), to appear in the proceedin

Scientific paper

We analyzed the longest phase-connected photometric dataset available for NGC 1313 X-2, looking for the ~6 day modulation reported by Liu et al. (2009). The folded B band light curve shows a 6 days periodicity with a significance slightly larger than 3 sigma. The low statistical significance of this modulation, along with the lack of detection in the V band, make its identification uncertain.

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