GAMMA-RAY OBSERVATIONS OF THE CRAB-NEBULA AT TEV ENERGIES

被引：161
|
作者：
VACANTI, G
CAWLEY, MF
COLOMBO, E
FEGAN, DJ
HILLAS, AM
KWOK, PW
LANG, MJ
LAMB, RC
LEWIS, DA
MACOMB, DJ
OFLAHERTY, KS
REYNOLDS, PT
WEEKES, TC
机构：
[1] IOWA STATE UNIV SCI & TECHNOL,DEPT PHYS,AMES,IA 50011
[2] ST PATRICKS COLL,DEPT PHYS,MAYNOOTH,KILDARE,IRELAND
[3] HARVARD SMITHSONIAN CTR ASTROPHYS,WHIPPLE OBSERV,CAMBRIDGE,MA 02138
[4] NATL UNIV IRELAND UNIV COLL DUBLIN,DEPT PHYS,DUBLIN 4,IRELAND
[5] UNIV LEEDS,DEPT PHYS,LEEDS LS2 9JT,W YORKSHIRE,ENGLAND
来源：
ASTROPHYSICAL JOURNAL | 1991年 / 377卷 / 02期
关键词：
GAMMA-RAYS; GENERAL; NEBULAE; CRAB NEBULA; PULSARS; RADIATION MECHANISMS;
D O I：
10.1086/170376
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The Crab Nebula was observed in TeV gamma rays with the Whipple Observatory high-resolution atmospheric Cherenkov camera and a signal was detected at the 20-sigma-level. The energy spectrum derived has the form N(E) x dE = 2.5 x 10(-10) (E/0.4 TeV)-2.4 +/- 0.3 photons cm-2 s-1 TeV-1 between 0.4 and 4 TeV. There is no evidence for the pulsar periodicity, and the flux is steady on a monthly time scale. If this signal is used to optimize the technique for gamma-ray detection, then a flux one-tenth that of the Crab can be detected at the 3-sigma-level in 60 hr of integration time. For an on-axis source the angular resolution is shown to be +/- 0.-degrees-1.
引用
收藏
页码：467 / 479
页数：13
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