1999ApJ...517L.109S

Query : 1999ApJ...517L.109S

1999ApJ...517L.109S - Astrophys. J., 517, L109-L112 (1999/June-1)

GRB 990123: the optical flash and the fireball model.

SARI R. and PIRAN T.

Abstract (from CDS):

We show that the ongoing observations of the remarkable burst GRB 990123 agree with the predictions of the fireball model. Specifically, the observations confirm the recent prediction that the reverse shock propagating into the ejecta would produce a very strong prompt optical flash. This reverse shock has also produced the 8.46 GHz radio signal, observed after 1 day. The forward shock, which is the origin of the classical afterglow, has produced the prompt X-ray signal as well as the late optical and IR emission. The observations suggest that the initial Lorentz factor of the ejecta was ∼200. Within factors of order unity, this crude model explains all current observations of GRB 990123.

Abstract Copyright: ∼

Journal keyword(s): Gamma Rays: Bursts - Hydrodynamics - Relativity - Shock Waves

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 GRB 990123 gB 15 25 29 +44 45.0     8.95     ~ 1012 1

Query : 1999ApJ...517L.109S

Basic data :
GRB 990123 -- Gamma-ray Burst
Other object types: otypes_help 		gB (GRB,Trigger,...), V* (AAVSO), X (SAX)
ICRS coord. (ep=J2000) : 		15 25 29.0 +44 45 00 (Gamma-ray) [ ] E 2015ApJ...807...76L
FK4 coord. (ep=B1950 eq=1950) : 		15 23 47.0 +44 55 28 [ ]
Gal coord. (ep=J2000) : 		073.0921 +54.6461 [ ]
Radial velocity / Redshift / cz : 		V(km/s) 222526 [~] / z(~) 1.6 [~] / cz 479668 [~]
   D 2006A&A...447..499V
Fluxes (1) :
V 8.95 [~] E ~
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Identifiers (6) :
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GRB 990123 Trigger 7343 [STK2001] 11201d
SAX J1525.5+4446 XRF 990123 AAVSO 1522+45

References (1012 between 1850 and 2026) (Total 1012)
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Velocities : 1   

   

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