ar X iv : a st ro - p h / 04 04 34 3 v 2 7 A ug 2 00 4 Orbital Parameters for the Black Hole Binary XTE J 1650 - 500

Abstract

We present R-band photometry of the X-ray transient and candidate black hole binary XTE J1650-500 obtained between 2003 May and August with the 6.5m Clay Telescope. A timing analysis of these data reveals a photometric period of 0.3205 ± 0.0007 days (i.e. 7.63 hr) with a possible alias at 0.3785 days (9.12 hr). Our photometry completely rules out the… (More)

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