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Searching for the orbital period of the ultraluminous X-ray source NGC 1313 X-2

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Authors
Zampieri, L.
Impiombato, D.
Falomo, R.
Grise', F.
Soria, Roberto
Date
2012
Type
Journal Article

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Zampieri, L. and Impiombato, D. and Falomo, R. and Grise', F. and Soria, R. 2012. Searching for the orbital period of the ultraluminous X-ray source NGC 1313 X-2. Monthly Notices of the Royal Astronomical Society. 419: pp. 1331-1337.
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Monthly Notices of the Royal Astronomical Society
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Curtin Institute of Radio Astronomy (Physics)
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This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society, ©: 2011, the authors and the Royal Astronomical Society. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

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Abstract

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