4UO115+63 revisited - a search for TeV photons during 1989
R C Rannot; C L Bhat; V K Senecha; M L Sapru; A K Tickoo; R K Kaul; R C Rannot; Nucl. Res. Lab., Bhabha Atomic Res. Centre, Bombay, India; C L Bhat; Nucl. Res. Lab., Bhabha Atomic Res. Centre, Bombay, India; V K Senecha; Nucl. Res. Lab., Bhabha Atomic Res. Centre, Bombay, India; M L Sapru; Nucl. Res. Lab., Bhabha Atomic Res. Centre, Bombay, India; A K Tickoo; Nucl. Res. Lab., Bhabha Atomic Res. Centre, Bombay, India; R K Kaul; Nucl. Res. Lab., Bhabha Atomic Res. Centre, Bombay, India
Журнал:
Journal of Physics G: Nuclear and Particle Physics
Дата:
1994-01-01
Аннотация:
An analysis of 47 hours of data, collected by the Gulmarg gamma-ray telescope during the period 27 September-30 October 1989, indicates the absence of a statistically significant DC signal from the X-ray binary pulsar, 4UO115+63, at photon energies >or=4 TeV. An independent search, carried out for a pulsed signal in the same database, using the well known Rayleigh power test, also does not yield evidence for any episodic, or persistent-pulsed, gamma-ray emission from the source. An upper limit of 2.33*10<sup>-11</sup> photons cm<sup>-2</sup> s<sup>-1</sup> is placed at 99% confidence level on the steady gamma-ray flux from this transient X-ray binary system at photon energies >4 TeV.
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