An upper limit on TeV gamma rays from Geminga
R K Kaul; H S Rawat; V K Senecha; R C Rannot; M L Sapru; A K Tickoo; C L Bhat; H Razdan; S C Tonwar; R K Kaul; Bhabha Atomic Res. Centre, Nucl. Res. Lab., Srinagar, India; H S Rawat; Bhabha Atomic Res. Centre, Nucl. Res. Lab., Srinagar, India; V K Senecha; Bhabha Atomic Res. Centre, Nucl. Res. Lab., Srinagar, India; R C Rannot; Bhabha Atomic Res. Centre, Nucl. Res. Lab., Srinagar, India; M L Sapru; Bhabha Atomic Res. Centre, Nucl. Res. Lab., Srinagar, India; A K Tickoo; Bhabha Atomic Res. Centre, Nucl. Res. Lab., Srinagar, India; C L Bhat; Bhabha Atomic Res. Centre, Nucl. Res. Lab., Srinagar, India; H Razdan; Bhabha Atomic Res. Centre, Nucl. Res. Lab., Srinagar, India; S C Tonwar; Bhabha Atomic Res. Centre, Nucl. Res. Lab., Srinagar, India
Журнал:
Journal of Physics G: Nuclear and Particle Physics
Дата:
1989-08-01
Аннотация:
Atmospheric Cerenkov events recorded by the Gulmarg gamma-ray telescope between December 1984 and December 1985 have been systematically searched for both steady and time-dependent photon emissions from the enigmatic 2CG catalogue source Geminga at energies above 6 TeV. Having found none at the authors sensitivity level, upper limits are derived on both the emission modes which, while comparing favourably with those obtained at Whipple Observatory and Ooty, are significantly below the flux values quoted for this source by the Tian-Shan group.
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