Observational features of cosmic gamma-ray bursts: Evidence for Galactic versus extragalactic origin

Abstract

view Abstract Citations (10) References (37) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Observational Features of Cosmic Gamma-Ray Bursts: Evidence for Galactic versus Extragalactic Origin Hurley, Kevin Abstract The recent observational data on gamma-ray bursts are reviewed. Burst time histories display features at the millisecond level which suggest a compact object origin. Lines in the energy spectra and spectral evolution point toward a Galactic neutron star origin, even though line features have not yet been confirmed in recent data. The Galactic distribution of burst sources, however, is both isotropic and sampled to its characteristic distance, making it unlikely that the sources are related to populations of Galactic neutrons stars we are familiar with. Counterpart searches, previously carried out years after the gamma-ray bursts, are now proceeding days after the events. Based on the current data, it is impossible to conclude whether bursters are Galactic, extragalactic, or both. Data being returned from current experiments, as well as data from new experiments to be launched in the next few years, may yet provide the answer. Publication: The Astrophysical Journal Supplement Series Pub Date: February 1994 DOI: 10.1086/191915 Bibcode: 1994ApJS...90..857H Keywords: Galactic Radiation; Gamma Ray Bursts; High Energy Interactions; Intergalactic Media; Neutron Stars; Energy Spectra; Light Curve; Line Spectra; Spatial Distribution; Astrophysics; GAMMA RAYS: BURSTS full text sources ADS |