VERITAS Observations of LSI +61 303

Astronomy and Astrophysics – Astronomy

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Scientific paper

The galactic microquasar LSI +61 303 has been a source of interest for many years due to its periodic X-ray and radio emission which are seemingly tied to its 26.5 day orbital cycle and its association with the EGRET UID source J0214+6103. The recent MAGIC detection of the source in > 200 GeV gamma rays also places the system among a new class of galactic gamma-ray emitters. Along with LS 5039 (detected by HESS) the MAGIC detection opens up a new window on galactic accretion/emission processes as well as standing to contribute to our understanding of similar emission processes in AGN. In this paper we report on the observations of LSI +61 303 undertaken this Fall by the VERITAS collaboration using the partially completed VERITAS array and with the Whipple 10m gamma-ray telescope. As it is currently constituted, the VERITAS array is sensitive in the range of 0.1->20 TeV. LSI +61 303 was observed from September until November 2006 as a part of a multi-wavelength campaign on the source utilizing X-ray data from RXTE and IR data from the PAIRITEL observatory. A search for correlation of emission across the bands is performed as well as a comparison of the TeV observations with the MAGIC detection.

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