Astrophysics (Index)About

gamma-ray burst

(GRB)
(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. Presumed sources include supernovae, magnetars, and/or 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. The term 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)
Further reading:
http://en.wikipedia.org/wiki/Gamma_ray_burst
PrefixExample  
GBSGBS 0525-66or GRB, "gamma burst source"
GRBGRB 170817Ageneral GRB prefix

Referenced by pages:
anisotropy
Compton Gamma Ray Observatory (CGRO)
Compton telescope
COSI
Fermi (FGST)
Fenton Hill Observatory (FHO)
flux
gamma rays (GR)
Ginga
GW170817
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)
IceCube
International Cometary Explorer (ICE)
INTEGRAL
Livermore Optical Transient Imaging System (LOTIS)
magnetar
multi-messenger astronomy
Pi of the Sky
Pioneer Venus Orbiter (PVO)
RoboNet
ROTSE
soft gamma repeater (SGR)
superluminous supernova (SLSN)
Swift
TAROT
transient
transient astronomy
Ulysses
X-ray burster (XRB)

Index