Search for point sources of gamma radiation above 15 TeV with the HEGRA AIROBICC array
Open Access
- 5 July 2002
- journal article
- research article
- Published by EDP Sciences in Astronomy & Astrophysics
- Vol. 390 (1) , 39-46
- https://doi.org/10.1051/0004-6361:20020686
Abstract
A search for potential point sources of very high energy gamma rays has been carried out on the data taken simultaneously by the HEGRA AIROBICC and Scintillator arrays from August 1994 to March 2000. The list of sought sources includes supernova remnants, pulsars, AGNs and binary systems. The energy threshold is around 15 TeV. For the Crab Nebula, a modest excess of 2.5 standard deviations above the cosmic ray background has been observed. Flux upper limits (at c.l.) of around 1.3 times the flux of the Crab Nebula are obtained, in average, for the candidate sources. A different search procedure has been used for an all-sky search which yields absolute flux upper limits between 4 and 9 crabs depending on declination, in the band from to .Keywords
This publication has 20 references indexed in Scilit:
- A Survey of the Northern Sky for TeV Point SourcesThe Astrophysical Journal, 2001
- The Energy Spectrum of TeV Gamma Rays from the Crab Nebula as Measured by the HEGRA System of Imaging Air Cerenkov TelescopesThe Astrophysical Journal, 2000
- T[CLC]e[/CLC]V Observations of Markarian 501 with the Milagrito Water Cerenkov DetectorThe Astrophysical Journal, 1999
- Locating TeV γ-ray sources with sub-arcminute precision: the pointing calibration of the HEGRA system of Imaging Atmospheric Cherenkov TelescopesAstroparticle Physics, 1997
- First results on the performance of the HEGRA IACT arrayAstroparticle Physics, 1997
- A Search for Ultra–High‐Energy Gamma‐Ray Emission from the Crab Nebula and PulsarThe Astrophysical Journal, 1997
- A Catalogue of Galactic Supernova RemnantsPublished by Cambridge University Press (CUP) ,1996
- A search for gamma radiation above 24 TeV energy from cosmic point sourcesAstroparticle Physics, 1995
- Search for isotropic γ radiation in the cosmological window between 65 and 200 TeVPhysics Letters B, 1995
- A Northern Sky Survey for Astrophysical Point Sources of 100 TeV Gamma RadiationThe Astrophysical Journal, 1993