Author: Patrick Olson SlanePublisher:
ISBN:
Category :
Languages : en
Pages : 434
Book Description
A Search for Very High Energy Gamma Rays from Hercules X-1
Author: Patrick Olson SlaneSearch for Very High Energy Gamma Ray Emission from Hercules X-1
Author: Linda Ann KelleyPublisher:
ISBN:
Category : Gamma ray astronomy
Languages : en
Pages : 0
Book Description
A Search for Very High Energy Gamma-rays from Hercules X-1 Using the Pulse Profile Technique
Author: Michael Damien RobertsPublisher:
ISBN:
Category :
Languages : en
Pages : 162
Book Description
A Search for Very High Energy Gamma Rays from Hercules X-I.
Author: Stephen John KennySearch for Very High Energy Gamma Ray Emission from Hercules X-1
Author: Detection of Hercules X-1 and the Search for Very High Energy Gamma Ray Emission from the Galactic Plane
Author: Paul T. ReynoldsDetection of Very High Energy Gamma Rays from the Binary X-ray Source Hercules X-1
Author: Robert J. WilliamsA Study of Ultra High Energy Radiation Associated with Hercules X-1
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 274
Book Description
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.
Very High Energy Gamma Ray Astronomy
Author: K.E. TurverPublisher: Springer Science & Business Media
ISBN: 9400938314
Category : Science
Languages : en
Pages : 303
Book Description
An Advanced Research Workshop on Very High Energy Gamma Ray Astronomy and Related Topics was held at Durham, England during August 11-15 1986. The meeting was sponsored by the Scientific Affairs Division of NATO and the University of Durham. It is four years since the first Workshop dedicated to High Energy Gamma Ray Astronomy was held at Ootacamund, India. At that meeting the developments in Very High Energy Gamma Ray Astronomy over a period of more than 20 years were reported and the methodology, limitations, improvements and prospects for further progess were discussed. The possible requirement for a follow-up meeting was clear if the optimistic future foreseen for the field at the Ooty meeting was correct. The Durham meeting was suggested to fill this role. Although the arrangements for the Durham meeting were discussed as long ago as 1983 with possible dates in 1984 or 1986, the eventual date in 1986 has proved admirable and has coincided with a time when further advances have been reported. An important feature of the proposal for the Durham meeting was the emphasis on a series of Workshop sessions, the conclusions of each to be summarized by a Rapporteur. The purpose of these sessions was to provide a consensus view of many of the important areas in the field at a time of increasing interest by the rest of the astrophysics community.
Author: Steven David Bloomer