Astrophysical Journal Letters, in press DISCOVERY OF TEV GAMMA RAYS FROM SN1006: FURTHER EVIDENCE FOR THE SNR ORIGIN OF COSMIC RAYS
نویسندگان
چکیده
This paper reports the rst discovery of TeV gamma-ray emission from a supernova remnant made with the CANGAROO 3.8 m Telescope. TeV { 2 { gamma rays were detected at the sky position and extension coincident with the northeast (NE) rim of shell-type Supernova remnant (SNR) SN1006 (Type Ia). SN1006 has been a most likely candidate for an extended TeV Gamma-ray source, since the clear synchrotron X-ray emission from the rims was recently observed by ASCA (Koyama et al. 1995), which is a strong evidence of the existence of very high energy electrons up to hundreds of TeV in the SNR. The observed from the 1996 and 1997 observations, respectively. Also we set an upper limit on the TeV gamma-ray emission from the SW rim, estimated to be 1:1 10 ?12 cm ?2 s ?1 (1:7 0:5 TeV, 95% CL) in the 1997 data. The TeV gamma rays can be attributed to the 2.7 K cosmic background photons up-scattered by electrons of energies up to about 10 14 eV by the inverse Compton (IC) process. The observed ux of the TeV gamma rays, together with that of the non-thermal X-rays, gives rm constraints on the acceleration process in the SNR shell; a magnetic eld of 6:5 2 G is inferred from both the synchrotron X-rays and inverse Compton TeV gamma-rays, which gives entirely consistent mechanisms that electrons of energies up to 10 14 eV are produced via the shock acceleration in SN1006.
منابع مشابه
Discovery of Tev Gamma Rays from Sn1006: Further Evidence for the Snr Origin of Cosmic Rays
This paper reports the first discovery of TeV gamma-ray emission from a supernova remnant made with the CANGAROO 3.8 m Telescope. TeV gamma rays were detected at the sky position and extension coincident with the north-east (NE) rim of shell-type Supernova remnant (SNR) SN1006 (Type Ia). SN1006 has been a most likely candidate for an extended TeV Gamma-ray source, since the clear synchrotron X-...
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