Abstract
Recent results on study of ultra high energy radiation from astrophysical compact objects using the CYGNUS* array at Los Alamos are presented. Observation of episodic emissions from Her X-1 in 1986 are described. Two bursts of radiation on UT July 24 1986 were detected showing a periodicity of 1.2357±0.0003sec with a statistical significance of ~ 2 ×10-5. The showers were found to have a muon content similar to that for hadronic showers and the energy of their progenitors were greater than 400 TeV. The characteristic muon poor feature of similar gamma ray initiated showers was not observed for the signal.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
R. J. Protheroe, rapportuer talk at the 20th International Cosmic Ray Conference, Moscow, USSR, 1987, 8,21.
A. A. Watson, 19th International Cosmic Ray conference, La Jolla, CA,1985, edited by F. C. Jones, J. Adams and G. M. Mason, (NASA conference publication 2376, Washington, D. C,1985), vol. 9, pp 111–140.
M. Samorski and M. Stamm Ap. J., 268, (1983).
J. Lloyd Evans, et al., Nature, 305, 784, (1983).
T. Kifune, et al., 19th International Cosmic Ray conference, La Jolla, CA, 1985, edited by F. C. Jones, J. Adams and G. M. Mason,(NASA conference publication 2376), vol. 1, p. 91.
N. V. Gopalkrishnan, et al., 20th International Cosmic Ray Conference, Moscow, USSR, 1987, edited by V. A. Kozyvarivsky, A. S. Lid-vansky, T. I. Tulupova, A. L. Tsyabuk, A. V. Voevdovsky and N. S. Volgemut, (NAUKA, Moscow, 1987), vol. OG1, p 228.
R. M. Baltrusaitis, et al, Ap. J. (Lett.), 293, L69, (1985a).
R. M. Baltrusaitis, et al., 20th International Cosmic Ray Conference, Moscow, USSR, 1987, edited by V. A. Kozyvarivsky, A. S. Lidvansky, T. I. Tulupova, A. L. Tsyabuk, A. V. Voevdovsky and N. S. Volgemut, (NAUKA, Moscow, 1987), vol. OG1, p. 212.
V. V. Alexeenko, et al., 20th International Cosmic Ray Conference, Moscow, USSR, 1987, edited by V. A. Kozyvarivsky, A. S. Lidvansky, T. I. Tulupova, A. L. Tsyabuk, A. V. Voevdovsky and N. S. Volgemut, (NAUKA, Moscow, 1987), vol. OG1, p. 219.
P. V. J. Eames, et al., 20th International Cosmic Ray Conference, Moscow, USSR, 1987, edited by V. A. Kozyvarivsky, A. S. Lidvansky, T. I. Tulupova, A. L. Tsyabuk, A. V. Voevdovsky and N. S. Volgemut, (NAUKA, Moscow, 1987), vol. OG1, p. 210.
B. L. Dingus, et al., paper to be published in Phys. Rev. Letters, (1988).
R. M. Baltrusaitis, et al., Ap. J. (Lett.), 293, L69, (1985b).
B. L. Dingus, et al., Paper presented at the Highlight session of VHE and UHE Astronomy, at the 20th International Cosmic Ray Conference, Moscow, USSR, 1987, to be published.
R. J. Protheroe, et al.,Ap. J. (Lett.),209, L73, (1984).
R. J. Protheroe and R. W. Clay, Nature, 315, 205, (1985).
F. Halzen, CERN preprint, CERN-TH.4570/86, 1986; and Halzen F. and Drees M., University of Wisconsin preprint, MAD/PH/408, February 1988.
G. Domokos and S. Nussinov, Phys. Lett., 187B, 372, (1987).
G. Domokos and S. Kovesi-Domokos, Johns Hopkins University preprint, JHU-TIPAC.8803, February 1988.
J. M. Cohen and E. Mustafa, Ap. J., 319, 930, (1987).
T. K. Gaisser, et al., NASA/Goddard preprint 86–008, to appear in Ap. J. (1987).
T. J. Haines, et al., Telemark IV Conference on Neutrino Masses and Neutrino Astrophysics, Ashland, Wisconsin, 1987, edited by Vernon Barger, Francis Halzen, Marvin Marshak and Keith Olive, (World Scientific Pub., Singapore, 1987), p. 430.
R. C Allen, et al., Phys. Rev. Letters, 55, 2401,(1985).
B. L. Dingus, et al., Proceedings of the 2nd Conference on the Inter-section between Particle and Nuclear Physics, Lake Louise, Canada, 1986, edited by Donald Geesman, (AIP Proc. No. 150,1986), p. 1078.
H. Tananbaum, et al., Ap. J. (Lett.),174, L143, (1972).
R. Giacconi, et al., Ap. J., 184, 227, (1973).
P. W. Gorham, et al., Ap. J.,309,114, (1986); and Ap. J. (Lett.),308, Lll, (1986).
P. M. Chadwick, et al., to be published in Ap. J. 1988.
J. C Dowthwaite, et al., Nature, 309, 691, (1984).
P. N. Bhat, et al., 20th International Cosmic Ray Conference, Moscow, USSR, 1987, edited by V. A. Kozyvarivsky, A. S. Lidvansky, T. I. Tulupova, A. L. Tsyabuk, A. V. Voevdovsky and N. S. Volgemut, (NAUKA, Moscow, 1987), vol. OG1, p. 248.
R. C. Lamb, et al., to be published in Ap. J. (Lett.) 1988.
L. Resvanis, et al., to be published in Ap. J. 1988.
R. J. Protheroe, Astr. Exp.,1,137, 1985.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1989 Kluwer Academic Publishers
About this chapter
Cite this chapter
Yodh, G.B. et al. (1989). Ultra High Energy Radiation from Hercules X-l; New Physics Above 100 TEV ?. In: Shapiro, M.M., Wefel, J.P. (eds) Cosmic Gamma Rays, Neutrinos, and Related Astrophysics. NATO ASI Series, vol 270. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-0921-2_15
Download citation
DOI: https://doi.org/10.1007/978-94-009-0921-2_15
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-6903-8
Online ISBN: 978-94-009-0921-2
eBook Packages: Springer Book Archive