Location of the 1979 April 6 gamma-ray burst

Journal Article · Wed Apr 15 04:00:00 EST 1981 · Astrophys. J., Lett. Ed.; (United States)

DOI:https://doi.org/10.1086/183523· OSTI ID:6452580

Laros, J G; Evans, W D; Fenimore, E E; Klebesadel, R W; Barat, C; Hurley, K; Niel, M; Vedrenne, G; Estulin, I V; Zenchenko, V M; Mersov, G A

A gamma-ray burst was recorded on 1979 April 6 at 1140 UT by instruments on the Pioneer Venus Orbiter (PVO) Venera 11 (V11), Venera12 (V12), Prognoz 7 (P7), and International Sun-Earth Explorer-3 (ISEE-3) spacecraft. The event consisted of a single spike of 0.2 s duration and had a spectral feature near 400 keV (Mazets and Golenetskii), thus resembling the 1979 March 5 events (Mazets et al .; Cline et al .; Evans et al .; Brarat et al.) in two respects. However, important differences in rise time and spectral hardness prevent one from concluding positively that the two events shared the same mechanism or had comparable energetics. Using arrival time analysis we have obtained for the April 6 burst a <1/sub '/ diameter error box centered at (..cap alpha.., delta)/sub 1950/ = (23/sup h/11/sup m/12/sup s/,-49/sup 0/55'39''). According to our searches, there is no cataloged object within or suggestively close to this error box. A UK Schmidt plate of the region likewise revealed no images within the error box to m/sub v/ = 22.5. Constraints placed by these findings on the energetics and types of objects that could be responsible for the April 6 and possibly the March 5 bursts are discussed.

• Research Organization: University of California, Los Alamos Scientific Laboratory
• OSTI ID: 6452580
• Journal Information: Astrophys. J., Lett. Ed.; (United States), Journal Name: Astrophys. J., Lett. Ed.; (United States) Vol. 245:2; ISSN AJLEA
• Country of Publication: United States
• Language: English

Related Subjects

640101* -- Astrophysics &amp; Cosmology-- Cosmic Radiation
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC GAMMA BURSTS
COSMIC GAMMA SOURCES
COSMIC RADIATION
COSMIC RAY SOURCES
DETECTION
GAMMA SPECTRA
IONIZING RADIATIONS
PIONEER SPACE PROBES
PRIMARY COSMIC RADIATION
RADIATION DETECTION
RADIATIONS
SPACE VEHICLES
SPECTRA
VEHICLES
VENERA SPACE PROBES