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Confirmation of the optical identification and binary period in IGR J05007-7047

ATEL # 2597; M.J. Coe (Southampton University, UK), L.J. Townsend (Southampton University, UK) & A. Udalski (Warsaw University Observatory, Poland)
on 4 May 2010; 21:18 UT
Password Certification: Malcolm Coe (

Subjects: Optical, X-ray, Binaries, Neutron Stars
Referred to by ATEL #: 2601

The optical counterpart to IGR J05007-7047 can be found in the OGLE III database as source named LMC130.4 19472. Timing analysis of eight years of monitoring of this system in the I-band reveals a clear period at 30.80 +/- 0.03d, together with the beat period associated with the annual sampling cycle. This confirms the period seen in the X-ray band by La Parola et al in ATEL #2594 and the optical counterpart identified by Halpern in ATEL #572.

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