Gupta, S. K. ; Sreekantan, B. V. ; Srivatsan, R. ; Tonwar, S. C. (1993) An episode of ultrahigh energy radiation from the γ-ray source Geminga: GRAPES I observations at Ooty during 1984-1987 Physical Review D - Particles, Fields, Gravitation and Cosmology, 48 (8). pp. 3463-3466. ISSN 1550-7998
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Official URL: http://prd.aps.org/abstract/PRD/v48/i8/p3463_1
Related URL: http://dx.doi.org/10.1103/PhysRevD.48.3463
Abstract
A study of showers arriving from the direction of the γ-ray source Geminga (1E0630+178) has shown evidence for emission of ultrahigh energy radiation during the one week interval October 10-16, 1986. 83 showers were observed in the source bin as against an expected background of 44.1. The probability of observing this excess based on Monte Carlo simulations is less than 10-4. The flux observed during this period (1.00±0.24)×10-11 cm-2 s-1 at energies ≥1014 eV corresponds to a time-averaged luminosity of 6×1032 erg s-1.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 50024 |
| Deposited On: | 21 Jul 2011 09:05 |
| Last Modified: | 21 Jul 2011 09:05 |
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