The Ginga rate of observing cyclotron lines. [GB 880205; GB 870303; GB 890926]

Conference · Mon Jul 05 00:00:00 EDT 1993 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:6076485

Fenimore, E E; Schwarz, G ^[1]; Lamb, D Q; Freeman, P ^[2]; Murakami, T ^[3]

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1. Los Alamos National Laboratory, MS D436, Los Alamos, NM 8745 (United States)
2. The University of Chicago, Chicago, IL 606037 (United States)
3. ISAS, Tokyo Japan (Japan)

The Ginga Gamma-ray burst detector has observed three gamma-ray bursts with absorption lines yet BATSE has not reported any lines. If the lines are cyclotron lines then gamma-ray bursts are almost certainly not at cosmological distances. Based on the Ginga data, we estimate the fraction of bursts that should contain lines if all bursts had lines like GB880205, GB870303, or GB890929 is consistent with roughly 35%. Using estimates of the steradian-sec factors for Ginga and BATSE implies that BATSE should be seeing about 5.5 events with lines per year although that number is rather uncertain. The features Ginga detects are most certainly not statistical flukes yet it is not clear why Ginga has such strong lines and BATSE does not.

• OSTI ID: 6076485
• Report Number(s): CONF-9210245--
• Journal Information: AIP Conference Proceedings (American Institute of Physics); (United States), Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Vol. 280:1; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

661300* -- Other Aspects of Physical Science-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION SPECTRA
BREMSSTRAHLUNG
COMPUTERIZED SIMULATION
COSMIC GAMMA BURSTS
COSMIC RADIATION
CYCLOTRON RADIATION
ELECTROMAGNETIC RADIATION
IONIZING RADIATIONS
MEASURING INSTRUMENTS
PRIMARY COSMIC RADIATION
PROBABILISTIC ESTIMATION
RADIATION DETECTORS
RADIATIONS
SATELLITES
SIMULATION
SPECTRA