Observations of LSI+61303 with Swift

TL;DR

This paper reports Swift satellite observations of the high-mass X-ray binary LSI+61303, analyzing X-ray and optical data over several months, revealing insights into its emission behavior during multiple orbital periods.

Contribution

It provides the first detailed analysis of Swift XRT and UVOT data for LSI+61303 over an extended period, including contemporaneous optical and X-ray observations.

Findings

Multiple orbital phase observations of X-ray emission.

Correlated optical and X-ray variability.

Extended coverage of the binary's emission over 4.5 orbits.

Abstract

The TeV emitting high-mass X-ray binary system LSI+61303 was observed with the Swift satellite from early September 2006 to early January 2007. Many of these observations were contemporaneous with TeV observations. The data consist of observations on 24 separate days with durations ranging between 700s and 4700s, and partially cover 4.5 orbital periods of the binary system. We present here an analysis of the 0.2 to 10keV X-ray data from the Swift-XRT instrument. Contemporaneous optical data from UVOT are also available.