Detection of Very High Energy Gamma Rays from the Binary X-ray Source Hercules X-1
Title | Detection of Very High Energy Gamma Rays from the Binary X-ray Source Hercules X-1 PDF eBook |
Author | Robert J. Williams |
Publisher | |
Pages | 227 |
Release | 1986 |
Genre | |
ISBN |
A Search for Very High Energy Gamma Rays from Hercules X-1
Title | A Search for Very High Energy Gamma Rays from Hercules X-1 PDF eBook |
Author | Patrick Olson Slane |
Publisher | |
Pages | 434 |
Release | 1988 |
Genre | |
ISBN |
A Study of Ultra High Energy Radiation Associated with Hercules X-1
Title | A Study of Ultra High Energy Radiation Associated with Hercules X-1 PDF eBook |
Author | |
Publisher | |
Pages | 274 |
Release | 1992 |
Genre | |
ISBN |
Data from the CYGNUS experiment has been used to examine ultra high energy (UHE) radiation associated with the X-ray binary star system Hercules X-1. A search for both pulsed, and unpulsed emission over time scales ranging from minutes to years has failed to yield a result of comparable significance to that of the previously published observation of July 24, 1986. A reassessment of this result in light of the number of hypotheses that have been examined for Hercules X-1 yields a probability estimate of 0.44% that the data is consistent with background fluctuations. If the number of independent source hypotheses is also accounted for, an overall chance probability of 1.8% is assessed for the observations of the CYGNUS experiment. The extensive air showers corresponding to the episode of July 24, 1986 contain a substantial muon content, in contradiction with traditional predictions for primary gamma-rays. No satisfactory theory has yet been put forward to explain this phenomenon. A further analysis of shower characteristics for events associated with this episode indicates a steeper radial dependence of the showerfront timing width at a chance probability level of 0.16%. This property might be explained by a model that invokes a forward-peaked and/or a deeply interacting component of the hadronic interaction in the atmosphere. The potential importance of UHE observations of Hercules X-1 is great. however the evidence is not yet compelling. Further observations will be necessary, to confirm the potential properties of associated UHE radiation.
Los Alamos Science
Title | Los Alamos Science PDF eBook |
Author | |
Publisher | |
Pages | 954 |
Release | 1983 |
Genre | Laboratories |
ISBN |
A Search for Very High Energy Gamma-rays from Hercules X-1 Using the Pulse Profile Technique
Title | A Search for Very High Energy Gamma-rays from Hercules X-1 Using the Pulse Profile Technique PDF eBook |
Author | Michael Damien Roberts |
Publisher | |
Pages | 162 |
Release | 1993 |
Genre | |
ISBN |
Mosaic
Title | Mosaic PDF eBook |
Author | |
Publisher | |
Pages | 454 |
Release | 1987 |
Genre | Science |
ISBN |
Scientific and Technical Aerospace Reports
Title | Scientific and Technical Aerospace Reports PDF eBook |
Author | |
Publisher | |
Pages | 836 |
Release | 1994 |
Genre | Aeronautics |
ISBN |