Physics
Scientific paper
Jul 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....4.2493k&link_type=abstract
Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I
Physics
5
Scientific paper
PSR 1706-44 has been observed at energies above several hundred GeV in 2000 and 2001 using the CANGAROO-I I 10 m telescope. above 1 TeV, the spectrum is a steep power-law, which is consistent with previous results. However, the spectral index seems to change around 1 TeV and becomes much flatter at lower energies. In addition, we analyzed Chandra X-Ray Observatory (Chandra) archival data to derive the X-ray spectra of the pulsar and the nebula, separately. The obtained X-ray spectrum indicates that the synchrotron peak energy appears to be above 10 keV. Combining the new results from CANGAROO-I I and Chandra data, the detailed unpulsed multi-wavelength spectrum from radio to TeV energies was obtained. The new results put severe restrictions on both the magnetic field of the nebula and the maximum energy of parent electrons, which make it difficult to explain the TeV gamma-ray emission by the conventional synchrotron nebula model.
CANGAROO Team
Kubo Harunobu
Kushida J.
Tanimori Toru
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