MAGIC Upper Limits for Two Milagro-detected Bright Fermi Sources in the Region of SNR G65.1+0.6
Title | MAGIC Upper Limits for Two Milagro-detected Bright Fermi Sources in the Region of SNR G65.1+0.6 |
Publication Type | Journal Article |
Year of Publication | 2010 |
Authors | Aleksić J., Antonelli L.A, Antoranz P., Backes M., Barrio J.A, Bastieri D., J. González B, Bednarek W., Berdyugin A., Berger K. et al. |
Journal | The Astrophysical Journal |
Volume | 725 |
Pagination | 1629-1632 |
Date Published | dec |
Keywords | ISM: supernova remnants, pulsars: individual: PSR J1957+2831 LAT PSR J1954+2836 LAT PSR J1958+2846 |
Abstract | We report on the observation of the region around supernova remnant G65.1+0.6 with the stand-alone MAGIC-I telescope. This region hosts the two bright GeV gamma-ray sources 1FGL J1954.3+2836 and 1FGL J1958.6+2845. They are identified as GeV pulsars and both have a possible counterpart detected at about 35 TeV by the Milagro observatory. MAGIC collected 25.5 hr of good quality data and found no significant emission in the range around 1 TeV. We therefore report differential flux upper limits, assuming the emission to be point-like (łt}=0fdg1) or within a radius of 0fdg3. In the point-like scenario, the flux limits around 1 TeV are at the level of 3% and 2% of the Crab Nebula flux for the two sources, respectively. This implies that the Milagro emission is either extended over a much larger area than our point-spread function or it must be peaked at energies beyond 1 TeV, resulting in a photon index harder than 2.2 in the TeV band. |
URL | http://adsabs.harvard.edu/abs/2010ApJ...725.1629A |
DOI | 10.1088/0004-637X/725/2/1629 |