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Gorham, P.W., Cawley, Michael F., Fegan, D.J., Gibbs, K.G., Lamb, R.C., Liebing, D.F., Porter, N.A., Stenger, V.J. and Weekes, T.C. (1986) Pulsed TeV Gamma Rays detected from Hercules X-l during X-ray source eclipse. Astrophysical Journal, 308. L11-L15. ISSN 0004-637X
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Abstract
Distinct 0.808-Hz pulsations were detected from Her X-1 in June 1985 using the atmospheric Cerenkov technique with the Whipple Observatory 10 m gamma-ray telescope, which had an effective gamma-ray energy threshold of about 600 GeV. The 2-hr observation spanned the transition into X-ray eclipse, at which the X-ray source Her X-1 is first occulted by the companion star HZ Herculis at orbital phase about 0.93 in the binary system. The pulsation persists for 1 hr or more after the beginning of the 6-hr eclipse, and it is concluded that the gamma-ray production site is in this case not coincident with the X-ray source.
| Item Type: | Article |
|---|---|
| Keywords: | Electromagnetic Pulses; Gamma Ray Astronomy; Pulsars; Stellar Radiation; X Ray Binaries; Doppler Effect; Power Spectra; Time Series Analysis; Astrophysics; Gamma Rays: General; Pulsars; Stars: Individual Constellation Name: Hercules X-1; X-Rays: Binaries; |
| Academic Unit: | Faculty of Science and Engineering > Experimental Physics |
| Item ID: | 12619 |
| Identification Number: | 10.1086/184734 |
| Depositing User: | Dr. Michael Cawley |
| Date Deposited: | 26 Mar 2020 15:51 |
| Journal or Publication Title: | Astrophysical Journal |
| Publisher: | American Astronomical Society |
| Refereed: | Yes |
| Related URLs: | |
| URI: | https://mural.maynoothuniversity.ie/id/eprint/12619 |
| Use Licence: | This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here |
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