Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999head....4.2901l&link_type=abstract
American Astronomical Society, HEAD meeting #4, #29.01; Bulletin of the American Astronomical Society, Vol. 31, p.732
Astronomy and Astrophysics
Astronomy
Scientific paper
We present the results of the search for pulsed TeV emission from the Crab Pulsar using the Whipple Observatory's 10m gamma-ray telescope. The Crab pulsar was observed for a total of 73.4 hours between November 1994, to March 1997. Several times during this period the 10m reflector was operated with a photometer at its focus. The signal from the photometer was run through the telescope electronics and timing system as a check of the fidelity of the instrument's timing characteristics. The phase analysis of the event arrival times yielded a clear detection of the optical Crab Pulsar. During the period of gamma-ray observations the Whipple 10m telescope was operated at its lowest energy threshold to date. Spectral analysis techniques have been applied to search for the gamma-ray Crab Pulsar signal over the energy band of the instrument (250 GeV - 10 TeV). The 33 ms pulsations from the Crab Pulsar were not detected. The 99.9 upper limit for pulsed emission will be given.
Lessard Rodney W.
Whipple Collaboration
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