Variability of VHE $\gamma$-ray emission from the binary PSR B1259-63/LS 2883

Abstract

We examine changes of the $\gamma$-ray intensity observed from the direction of the binary system PSR B1259-63/LS 2883 during campaigns around its three periastron passages. A simple and straightforward method is applied to the published data obtained with the Imaging Atmospheric Cherenkov Technique. Regardless of many issues of the detection process, the method works only with numbers of very high energetic photons registered in the specified regions. Within the realm of this scheme, we recognized changes attributable to the variations of the intrinsic source activity at high levels of significance.

In proceedings of SuGAR 2015 - Searching for the Sources of Galactic Cosmic Rays, Geneva, Switzerland

References in corpus (5)

• Background Modelling in Very-High-Energy gamma-ray Astronomy
• Discovery of High-Energy Gamma-Ray Emission from the Binary System PSR B1259-63/LS 2883 Around Periastron with Fermi
• Discovery of GeV gamma-ray emission from PSR B1259-63/LS 2883
• H.E.S.S. Observations of the Binary System PSR B1259-63/LS 2883 around the 2010/2011 Periastron Passage
• Variability of VHE $\gamma$-ray sources