1999MNRAS.306L..39M

Query : 1999MNRAS.306L..39M

1999MNRAS.306L..39M - Mon. Not. R. Astron. Soc., 306, L39-L43 (1999/July-1)

GRB 990123: reverse and internal shock flashes and late afterglow behaviour.

MESZAROS P. and REES M.J.

Abstract (from CDS):

The prompt (t≲0.16d) light curve and initial 9th-magnitude optical flash from GRB 990123 can be attributed to a reverse external shock, or possibly to internal shocks. We discuss the time decay laws and spectral slopes expected under various dynamical regimes, and the constraints imposed on the model by the observations, arguing that they provide strongly suggestive evidence for features beyond those in the simple standard model. The longer term afterglow behaviour is discussed in the context of the forward shock, and it is argued that, if the steepening after 3 d is due to a jet geometry, this is likely to be a result of jet-edge effects, rather than sideways expansion.

Abstract Copyright: 1999 RAS

Journal keyword(s): shock waves - cosmology: miscellaneous - gamma-rays: bursts MNRAS1130....

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 : 1999MNRAS.306L..39M

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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