ar X iv : a st ro - p h / 06 06 16 1 v 1 7 J un 2 00 6 Detection of VHE radiation from the BL Lac PG 1553 + 113 with the MAGIC telescope

Detection of Vhe Radiation from the Bl Lac Pg 1553+113 with the Magic Telescope

In 2005 and 2006, the MAGIC telescope has observed very high energy gamma-ray emission from the distant BL Lac object PG 1553+113. The overall significance of the signal is 8.8 σ for 18.8 h observation time. The light curve shows no significant flux variations on a daily time-scale, the flux level during 2005 was, however, significantly higher compared to 2006. The differential energy spectrum ...

ar X iv : a st ro - p h / 06 10 94 5 v 1 3 1 O ct 2 00 6 First results of galactic observations with MAGIC

During its first cycle, the MAGIC (Major Atmospheric Gamma-ray Imaging Cherenkov) telescope was performing an observational campaign covering a total of about 250 hours on galactic sources. Here we review the results for the very high energy (> 100 GeV) γ-ray emission from some of those sources.

ar X iv : a st ro - p h / 06 05 06 7 v 1 2 M ay 2 00 6 Sensitivity and pointing accuracy of the NEMO km 3 telescope

ar X iv : a st ro - p h / 98 12 12 2 v 1 7 D ec 1 99 8 PKS 2155 – 304 — a source of VHE γ - rays

The close X-ray selected BL Lac PKS 2155–304 has been observed using the University of Durham Mark 6 very high energy (VHE) gamma ray telescope during 1996 September/October/November and 1997 October/November. VHE gamma rays with energy > 300 GeV were detected with a time-averaged integral flux of (4.2±0.7 stat ±2.0 sys)×10 −11 cm −2 s −1. There is evidence for VHE gamma ray emission during our...

Probing the VHE γ-ray spectral curvature in PG 1553+113 1 Probing the very-high-energy γ-ray spectral curvature in the blazar PG 1553+113 with the MAGIC telescopes

PG 1553+113 is a very-high-energy (VHE, E > 100 GeV) γ-ray emitter classified as a BL Lac object. Its redshift is constrained by intergalactic absorption lines in the range 0.4 < z < 0.58. The MAGIC telescopes have monitored the source’s activity since 2005. In early 2012, PG 1553+113 was found in a high-state, and later, in April of the same year, the source reached the highest VHE flux state ...