(short flashes of gamma rays apparently from outside our galaxy)
A gamma-ray burst (GRB) is a short flash of gamma rays,
lasting from a few milliseconds to several minutes,
often followed by an afterglow (GRB afterglow) of longer-wavelength
radiation. Roughly half are accompanied by a visible
transient, the others being termed dark bursts.
GRBs were first detected in
1967 by satellites intended to detect nuclear weapons tests.
mergers of neutron stars. The latter is theorized
as a cause of short gamma ray bursts (SGRB), i.e.,
those lasting less than two seconds.
Superluminous supernovae are theorized to create long gamma ray bursts (LGRB),
i.e., more than two seconds.
GBS for gamma-ray burst source or gamma burst source is sometimes
used for bodies such as pulsars presumed to be sources.
Some bursts have been termed FRED GRBs
for fast rise exponential decay GRBs.
An orphan afterglow (orphan GRB afterglow) is the appearance
of an afterglow not subsequent to an apparent GRB. The presumption
is that the GRB gamma rays are highly beamed but the afterglow
spreads a bit wider, so we can observe the afterglow of some GRBs
that miss us.
(EMR,gamma rays,event type,transient type)
|Prefix||Example|| || |
|GBS||GBS 0525-66||or GRB, "gamma burst source"|| |
|GRB||GRB 170817A||general GRB prefix|| |
Referenced by pages:
Compton Gamma Ray Observatory (CGRO)
Fenton Hill Observatory (FHO)
gamma rays (GR)
habitable zone (HZ)
high-B radio pulsar (HBRP)
high-energy astrophysics (HEA)
Hercules-Corona Borealis Great Wall (Her-CrB GW)
High Energy Transient Explorer (HETE)
hypermassive neutron star (HMNS)
International Cometary Explorer (ICE)
Livermore Optical Transient Imaging System (LOTIS)
Pi of the Sky
Pioneer Venus Orbiter (PVO)
soft gamma repeater (SGR)
superluminous supernova (SLSN)
X-ray burster (XRB)