Observation of very high energy gamma-rays from the AGN 1ES 2344+514 in a low emission state with the MAGIC Telescope

Albert, J. ... [et al.].

J. M. Paredes investigador correspondiente del IAR.

Resumen: The 954 collaboration has observed very high energy gamma-ray emission from the AGN 1ES 2344+514. A gamma-ray signal corresponding to an 11 sigma excess and an integral flux of (2.38+/-0.30[sub]stat+/-0.70[sub]syst)×10[elevado a la]-11 cm[elevado a la]-2 s[elevado a la]-1 above 200 GeV has been obtained from 23.1 hr of data taking between 2005 August 3 and 2006 January 1. The data confirm the previously detected gamma-ray emission from this object during a flare seen by the Whipple collaboration in 1995 and the evidence (below 5 sigma significance level) from long-term observations conducted by the Whipple and HEGRA groups. The MAGIC observations show a relatively steep differential photon spectrum that can be described by a power law with a photon index of alpha=-2.95+/-0.12[sub]stat+/-0.2[sub]syst between 140 GeV and 5.4 TeV. The observations reveal a low-flux state, about 6 times below the 1995 flare seen by Whipple and comparable with the previous Whipple and HEGRA long-term measurements. During the MAGIC observations no significant time variability was observed