Search

Your search keyword '"Fichtel C"' showing total 12 results
Start Over Author "Fichtel C" Journal nature
12 results on '"Fichtel C"'

1. Pulsed high-energy gamma-rays from the radio pulsar PSR1706-44

Author

Thompson, D. J, Arzoumanian, Z, Bertsch, D. L, Brazier, K. T. S, D'Amico, N, Fichtel, C. E, Fierro, J. M, Hartman, R. C, Hunter, S. D, and Johnston, S

Subjects
Astrophysics
Abstract

Gamma radiation above 100 MeV in energy has been detected from the radio pulsar PSR1706-44. The gamma emission forms a single broad peak within the pulsar period of 102 ms, in contrast to the two narrow peaks seen in the other three known high-energy gamma-ray pulsars. The emission mechanism in all cases is probably the same, the differences arising from the geometry of the magnetic and rotation axes and the line of sight. Gamma-ray emission accounts for as much as 1 percent of the total neutron star spindown energy in these pulsars, much more than emerges at optical or radio frequencies. Thus, study of this emission is important in understanding pulsar emission and evolution.

Published
1992
Full Text
View/download PDF

2. Pulsed high-energy gamma-radiation from Geminga (1E0630 + 178)

Author

Bertsch, D. L, Brazier, K. T. S, Fichtel, C. E, Hartman, R. C, Hunter, S. D, Kanbach, G, Kniffen, D. A, Kwok, P. W, Lin, Y. C, and Mattox, J. R

Subjects
Astrophysics
Abstract

The detection of pulsed gamma rays with energy above 50 MeV from the soft X-ray source 1E0630 + 178 is reported, confirming the identification of Geminga with this X-ray source. The period derivative (11.4 +/- 1.7) x 10 exp -15 s/s suggests that Geminga is a nearby isolated rotating neutron star with a magnetic field of 1.6 x 10 exp 12 gauss, a characteristic age of 300,000 yr, and a spin-down energy loss rate of 3.5 x 10 exp 34 erg/s.

Published
1992
Full Text
View/download PDF

3. Detection of a gamma-ray burst of very long duration and very high energy

Author

Hurley, K., Dingus, B.L., Mukherjee, R., Sreekumar, P., Kouveliotou, C., Meegan, C., Fishman, G.J., Band, D., Ford, L., Bertsch, D., Cline, T., Fichtel, C., Hartman, R., Hunter, S., Thompson, D.J., Kanbach, G., Mayer-Hasselwander, H., Montigny, C. von, Sommer, M., Lin, Y., Nolan, P., Michelson, P., Kniffen, D., Mattox, J., and Schneid, E.

Subjects
Gamma rays -- Research, Photons -- Observations, Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

Experimental studies have identified a highly energetic gamma-ray burst (GRB) having a duration of 90 minutes. An 18-GeV photon is also detected in the burst within this duration. This burst had an overall fluence of (6.6 plus or minus 2.7) 10 to the power of -4 erg per square cm above 20keV. During the 90 minute duration non low-energy emissions accompanied the burst.

Published
1994

4. Observations of low energy gamma-ray bursts with SAS-2

Author

Oegelman, H, Fichtel, C. E, and Kniffen, D. A

Subjects
Space Radiation
Abstract

The present paper reports on the low-energy gamma-ray bursts observed by the plastic scintillator anticoincidence dome of the Small Astronomy Satellite-2 (SAS-2) gamma-ray telescope. SAS-2 detected two events observed by other satellites and discovered one which was subsequently confirmed by other satellite observations. Two events seen by other satellites were not detected by SAS-2, probably due to earth occultation. The event detection threshold for SAS-2 was almost two orders of magnitude lower than that of the Vela satellites.

Published
1975

6. Correction: Detection of a γ-ray burst of very long duration and very high energy

Author

Hurley, K., primary, Dingus, B. L., additional, Mukherjee, R., additional, Sreekumar, P., additional, Kouveliotou, C., additional, Meegan, C., additional, Fishman, G. J., additional, Band, D., additional, Ford, L., additional, Bertsch, D., additional, Cline, T., additional, Fichtel, C., additional, Hartman, R., additional, Hunter, S., additional, Thompson, D. J., additional, Kanbach, G., additional, Mayer-Hasselwander, H., additional, von Montigny, C., additional, Sommer, M., additional, Lin, Y., additional, Nolan, P., additional, Michelson, P., additional, Kniffen, D., additional, Mattox, J., additional, Schneid, E., additional, Boer, M., additional, and Niel, M., additional

Published
1995
Full Text
View/download PDF

7. Detection of a γ-ray burst of very long duration and very high energy

Author

Hurley, K., primary, Dingus, B. L., additional, Mukherjee, R., additional, Sreekumar, P., additional, Kouveliotou, C., additional, Meegan, C., additional, Fishman, G. J., additional, Band, D., additional, Ford, L., additional, Bertsch, D., additional, Cline, T., additional, Fichtel, C., additional, Hartman, R., additional, Hunter, S., additional, Thompson, D. J., additional, Kanbach, G., additional, Mayer-Hasselwander, H., additional, von Montigny, C., additional, Sommer, M., additional, Lin, Y., additional, Nolan, P., additional, Michelson, P., additional, Kniffen, D., additional, Mattox, J., additional, Schneid, E., additional, Boer, M., additional, and Niel, M., additional

Published
1994
Full Text
View/download PDF

8. Correction: Pulsed high-energy γ-rays from the radio pulsar PSR1706–44

Author

Thompson, D. J., primary, Arzoumanian, Z., additional, Bertsch, D. L., additional, Brazier, K. T. S., additional, D'Amico, N., additional, Fichtel, C. E., additional, Fierro, J. M., additional, Hartman, R. C., additional, Hunter, S. D., additional, Johnston, S., additional, Kanbach, G., additional, Kaspi, V. M., additional, Kniffen, D. A., additional, Lin, Y. C., additional, Lyne, A. G., additional, Manchester, R. N., additional, Mattox, J. R., additional, Mayer-Hasselwander, H. A., additional, Michelson, P. F., additional, Montigny, C. v., additional, Nel, H. I., additional, Nice, D., additional, Nolan, P. L., additional, Pinkau, K., additional, Rothermel, H., additional, Schneid, E. J., additional, Sommer, M., additional, Sreekumar, P., additional, and Taylor, J. H., additional

Published
1993
Full Text
View/download PDF

9. Pulsed high-energy γ-rays from the radio pulsar PSRI706–44

Author

Thompson, D. J., primary, Arzoumanian, Z., additional, Bertsch, D. L., additional, Brazier, K. T. S., additional, D'Amico, N., additional, Fichtel, C. E., additional, Fierro, J. M., additional, Hartman, R. C., additional, Hunter, S. D., additional, Johnston, S., additional, Kanbach, G., additional, Kaspi, V. M., additional, Kniffen, D. A., additional, Lin, Y. C., additional, Lyne, A. G., additional, Manchester, R. N., additional, Mattox, J. R., additional, Mayer-Hasselwander, H. A., additional, Michelson, P. F., additional, Montigny, C. v., additional, Nel, H. I., additional, Nice, D., additional, Nolan, P. L., additional, Pinkau, K., additional, Rothermel, H., additional, Schneid, E. J., additional, Sommer, M., additional, Sreekumar, P., additional, and Taylor, J. H., additional

Published
1992
Full Text
View/download PDF

10. Pulsed high-energy γ-radiation from Geminga (1E0630+178)

Author

Bertsch, D. L., primary, Brazier, K. T. S., additional, Fichtel, C. E., additional, Hartman, R. C., additional, Hunter, S. D., additional, Kanbach, G., additional, Kniffen, D. A., additional, Kwok, P. W., additional, Lin, Y. C., additional, Mattox, J. R., additional, Mayer–Hasselwander, H. A., additional, Montigny, C. v., additional, Michelson, P. F., additional, Nolan, P. L., additional, Pinkau, K., additional, Rothermel, H., additional, Schneid, E. J., additional, Sommer, M., additional, Sreekumar, P., additional, and Thompson, D. J., additional

Published
1992
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results