| タイトル | Search for TeV gamma-ray emission from Hercules X-1 |
| 著者（英） | Reynolds, P. T.; Fegan, D. J.; Lewis, D. A.; Kwok, P. W.; Macomb, D. J.; O'Flaherty, K. S.; Cawley, M. F.; Lamb, R. C.; Lang, M. J.; Hillas, A. M. |
| 著者所属（英） | NASA Goddard Space Flight Center|Harvard-Smithsonian Center for Astrophysics|Saint Patrick's Coll.|Leeds Univ.|University Coll.|Computer Sciences Corp.|Iowa State Univ. of Science and Technology |
| 発行日 | 1991-12-01 |
| 言語 | eng |
| 内容記述 | Six years of observations of Hercules X-1 with the Whipple Observatory gamma-ray telescope have been subjected to a Fourier analysis to search for emission at the 0.8079 Hz neutron star frequency. Evidence for a signal is found at the 99.5 percent confidence level for data taken with the medium-resolution imaging camera with some indications of emission at frequencies blueshifted from the fundamental frequency. However, analysis of the high-resolution camera data base have failed to substantiate this effect. Selection of events on the basis of gamma-ray-like image parameters did not enhance the signal from the medium-resolution data nor produce any indication of a signal from the high-resolution data. The overall conclusion is that no statistically significant evidence for TeV gamma-ray emission was found in the Whipple Observatory data base when the 6 years of data are taken as a whole. |
| NASA分類 | SPACE RADIATION |
| レポートNO | 92A14625 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/331025 |
|
