Peer-Reviewed Journal Details
Mandatory Fields
Lessard, RW;Bond, IH;Bradbury, SM;Buckley, JH;Burdett, GM;Carter-Lewis, DA;Catanese, M;Cawley, MF;D'Vali, M;Fegan, DJ;Finley, JP;Gaidos, JA;Gillanders, GH;Hall, T;Hillas, AM;Krennrich, F;Lang, MJ;Masterson, C;Moriarty, P;Quinn, J;Rose, HJ;Samuelson, FW;Sembroski, GH;Srinivasan, R;Vassiliev, VV;Weekes, TC
2000
March
Astrophysical Journal
Search for pulsed TeV gamma-ray emission from the Crab pulsar
Published
WOS: 34 ()
Optional Fields
OUTER MAGNETOSPHERE IMAGING TECHNIQUE NEBULA RADIATION GEMINGA BURST VELA
531
942
948
We present the results of a search for pulsed TeV emission from the Crab pulsar using the Whipple Observatory's 10-m gamma-ray telescope. The direction of the Crab pulsar was observed for a total of 73.4 hr between 1994 November and 1997 March. During this period the Whipple 10 m telescope was operated at its lowest energy threshold to date. Spectral analysis techniques were applied to search for the presence of a gamma-ray signal from the Crab pulsar over the energy band 250 GeV to 4 TeV. We do not see any evidence of the 33 ms pulsations present in other energy bands from the Crab pulsar. The 99.9% confidence level upper limit for pulsed emission above 250 GeV is derived to be 4.8 x 10(-12) cm(-2) s(-1) or less than 3% of the steady flux from the Crab Nebula. These results imply a sharp cutoff of the power-law spectrum seen by the EGRET instrument on the Compton Gamma-Ray Observatory. If the cutoff is exponential, it must begin at 60 GeV or lower to accommodate these upper limits.
0004-637X
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