Speaker
Description
The binary LS I +61$^{\circ}$ 303 was discovered as a gamma ray emitter nearly fifty years ago and has since been the subject of extensive observations across the electromagnetic spectrum. Composed of a primary Be star and a neutron star, LS I +61$^{\circ}$ 303 exhibits complex periodic behavior and variability from radio wavelengths to very-high-energy gamma rays (VHE, E>100 GeV), with timescales between 0.27s and four years. With the orbital inclination only loosely constrained and multiple orbital models, the origin of the VHE variability remains unknown. We present VERITAS’ extensive set of observations with coincident observations from Swift-XRT and Fermi-LAT. We explore the binary’s VHE characteristics throughout its entire 26.5 day orbit and use Swift-XRT and Fermi-LAT data to search for correlations between x-ray, high-energy gamma ray, and VHE gamma ray emission to reveal common emission mechanisms.
| Collaboration(s) | VERITAS |
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