1999MNRAS.305L..45B

Query : 1999MNRAS.305L..45B

1999MNRAS.305L..45B - Mon. Not. R. Astron. Soc., 305, L45-L48 (1999/May-3)

Will GRB 990123 perform an encore ?

BLANDFORD R.D. and HELFAND D.J.

Abstract (from CDS):

The recent gamma-ray burst GRB 990123 has an absorption redshift zs=1.60, implying an apparent energy E ≥ 3x1054 erg, and a peak luminosity Lmax≥ 6x1053 erg.s–1, assuming isotropic emission. This energy is 10 times larger than hitherto measured, and in excess of the rest mass of the Sun. Optical observations have revealed an associated galaxy displaced from the line of sight by ∼ 0.6 arcsec. This raises the possibility that the burst is enhanced by gravitational lensing. We argue that existing observations probably only allow magnifications µ >400 if the galaxy is at zd=1.60 and the burst originates at much higher redshift. It should be possible to exclude this possibility by examining the burst time structure. Although we anticipate that multiple imaging can be excluded in GRB 990123, our analysis should be generally applicable.

Abstract Copyright: 1999 RAS

Journal keyword(s): gravitational lensing - gamma-rays: bursts

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.305L..45B

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)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Velocities : 1   

   

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