2014ApJ...781...74L

Query : 2014ApJ...781...74L

2014ApJ...781...74L - Astrophys. J., 781, 74 (2014/February-1)

High energy emission of GRB 130821A: constraining the density profile of the circum-burst medium as well as the initial Lorentz factor of the outflow.

LIANG Y.-F., ZHOU B., HE H.-N., TAM P.-H.T., FAN Y.-Z. and WEI D.-M.

Abstract (from CDS):

GRB 130821A was detected by Fermi-GBM/LAT, Konus-WIND, SPI-ACS/INTEGRAL, RHESSI and Mars Odyssey-HEND. Although the data of GRB 130821A are very limited, we show in this work that the high energy γ-ray emission (i.e., above 100 MeV) alone imposes tight constraint on the density profile of the circum-burst medium as well as the initial Lorentz factor of the outflow. The temporal behavior of the high energy γ-ray emission is consistent with the forward shock synchrotron radiation model, and the circum-burst medium likely has a constant-density profile. The Lorentz factor is about a few hundred, similar to other bright GRBs.

Abstract Copyright: ∼

Journal keyword(s): gamma rays: general - radiation mechanisms: non-thermal

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 130821A gB 20 56 38.440 -12 02 36.53           ~ 25 0

Query : 2014ApJ...781...74L

Basic data :
GRB 130821A -- Gamma-ray Burst
Other object types: otypes_help 		gB (2016ApJS,GRB,...)
ICRS coord. (ep=J2000) : 		20 56 38.440 -12 02 36.53 (X-ray) [ 5500 5500 0 ] D 2013GCN.15123....1P
FK4 coord. (ep=B1950 eq=1950) : 		20 53 54.290 -12 14 10.52 [ 5500 5500 0 ]
Gal coord. (ep=J2000) : 		036.081577 -33.184763 [ 5500 5500 0 ]
Radial velocity / Redshift / cz : 		V(km/s) 179875 [~] / z(~) 1.00 [~] / cz 299792 [~]
   D 2015ApJS..218...12L
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Identifiers (2) :
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GRB 130821A Fermi bn130821674

References (25 between 1850 and 2026) (Total 25)
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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