S. Sahiner, S. C. Inam, A. Baykal, U. Kiziloglu
In this paper we present our recent timing and spectral analysis of the X-ray pulsar 4U 1907+09. Our X-ray data consist of an extended set of RXTE & INTEGRAL observations that were analyzed before ({\c{S}}ahiner et al. 2012). From X-ray observations we extended pulse period history of the source and revised orbital distribution of the X-ray dips. Using ROTSE IIId optical observations, we present long term optical light curve of the source to have a thorough understanding of long term optical behaviour.
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http://arxiv.org/abs/1212.3433
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