Publication

A survey of unidentified egret sources at very high energies

Fegan, S. J.
; 
Badran, H. M.
; 
Bond, I. H.
; 
Boyle, P. J.
; 
Bradbury, S. M.
; 
Buckley, J. H.
; 
Carter‐Lewis, D. A.
; 
Catanese, M.
; 
Celik, O.
; 
Cui, W.
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Repository DOI
Publication Date
2005-05-10
Keywords
galaxies : jets, gamma rays : observations, surveys, gamma-ray sources, source 3eg j2227+6122, x-ray, galactic plane, ls i+61-degrees-303, supernova-remnants, galaxy clusters, sax j0635+0533, tev energies, error box
Type
Article
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Citation
Fegan, S. J. Badran, H. M.; Bond, I. H.; Boyle, P. J.; Bradbury, S. M.; Buckley, J. H.; Carter‐Lewis, D. A.; Catanese, M.; Celik, O.; Cui, W.; Daniel, M.; D’Vali, M.; de la Calle Perez, I.; Duke, C.; Falcone, A.; Fegan, D. J.; Finley, J. P.; Fortson, L. F.; Gaidos, J. A.; Gammell, S.; Gibbs, K.; Gillanders, G. H.; Grube, J.; Hall, J.; Hall, T. A.; Hanna, D.; Hillas, A. M.; Holder, J.; Horan, D.; Jarvis, A.; Jordan, M.; Kenny, G. E.; Kertzman, M.; Kieda, D.; Kildea, J.; Knapp, J.; Kosack, K.; Krawczynski, H.; Krennrich, F.; Lang, M. J.; Le Bohec, S.; Lessard, R. W.; Linton, E.; Lloyd‐Evans, J.; Milovanovic, A.; McEnery, J.; Moriarty, P.; Mukherjee, R.; Muller, D.; Nagai, T.; Nolan, S.; Ong, R. A.; Pallassini, R.; Petry, D.; Power‐Mooney, B.; Quinn, J.; Quinn, M.; Ragan, K.; Rebillot, P.; Reynolds, P. T.; Rose, H. J.; Schroedter, M.; Sembroski, G. H.; Swordy, S. P.; Syson, A.; Vassiliev, V. V.; Wakely, S. P.; Walker, G.; Weekes, T. C.; Zweerink, J. (2005). A survey of unidentified egret sources at very high energies. The Astrophysical Journal 624 (2), 638-655
Abstract
The Whipple Observatory 10 m γ-ray telescope has been used to survey the error boxes of EGRET unidentified sources in an attempt to find counterparts at energies of 350 GeV and above. Twenty-one unidentified sources detected by EGRET (more than 10% of the total number) have been included in this survey. In no case is a statistically significant signal found in the EGRET error box, which implies that, at least for this sample, the γ-ray spectra of these sources steepen between 100 MeV and 350 GeV. For each EGRET source location, we list candidate associations and derive upper limits on the integral γ-ray flux above 350 GeV.
Funder
Publisher
IOP Publishing
Publisher DOI
10.1086/429123
Rights
Attribution-NonCommercial-NoDerivs 3.0 Ireland
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Externally hosted open access publications with University of Galway authors (1)