gamma-ray burst | has duration 0.1 - 4 s | ![2001-09-27 09:30:21.0 2001-09-27 09:30:21.0](facet.gif) |
has distribution isotropic with an increase towards the galactic center | ![2001-09-27 09:30:21.0 2001-09-27 09:30:21.0](facet.gif) |
has frequency of occurrence 5 per year | ![2001-09-27 09:30:21.0 2001-09-27 09:30:21.0](facet.gif) |
has energy spectrum 0.1-1.2 MeV | ![2001-09-27 09:30:21.0 2001-09-27 09:30:21.0](facet.gif) |
is a part of celestial sphere | ![2001-09-27 09:30:21.0 2001-09-27 09:30:21.0](facet.gif) |
has discovery date July 2, 1967 | ![2001-09-27 09:30:21.0 2001-09-27 09:30:21.0](facet.gif) |
has definition Short, intense, low-energy bursts, first recorded by the Vela satellite system on 1967 July 2. Their isotropic distribution suggests an extragalactic origin, but a galactic disk origin cannot be ruled out: there is a large increase in γ-ray flux in the direction of the galactic center. | ![has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:30:21.0 has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:30:21.0](facet.gif) |
is a kind of gamma ray source | ![2001-09-27 09:30:21.0 2001-09-27 09:30:21.0](facet.gif) |
gamma ray source | has wavelength gamma ray | ![2001-09-27 09:30:21.0 2001-09-27 09:30:21.0](facet.gif) |
celestial body | has spectra | ![2001-09-27 09:30:09.0 2001-09-27 09:30:09.0](facet.gif) |
physical object | has location or center of gravity | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has angular momentum | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has mass | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has velocity | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has momentum | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has temperature | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has volume | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has extent | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |
has material | ![2001-09-27 09:27:27.0 2001-09-27 09:27:27.0](facet.gif) |