2005A&A...443..841D

Query : 2005A&A...443..841D

2005A&A...443..841D - Astronomy and Astrophysics, volume 443, 841-849 (2005/12-1)

GRB 021004 modelled by multiple energy injections.

DE UGARTE POSTIGO A., CASTRO-TIRADO A.J., GOROSABEL J., JOHANNESSON G., BJOERNSSON G., GUDMUNDSSON E.H., BREMER M., PAK S., TANVIR N., CASTRO CERON J.M., GUZYI S., JELINEK M., KLOSE S., PEREZ-RAMIREZ D., ACEITUNO J., CAMPO BAGATIN A., COVINO S., CARDIEL N., FATHKULLIN T., HENDEN A.A., HUFERATH S., KURATA Y., MALESANI D., MANNUCCI F., RUIZ-LAPUENTE P., SOKOLOV V., THIELE U., WISOTZKI L., ANTONELLI L.A., BARTOLINI C., BOATTINI A., GUARNIERI A., PICCIONI A., PIZZICHINI G., DEL PRINCIPE M., DI PAOLA A., FUGAZZA D., GHISELLINI G., HUNT L., KONSTANTINOVA T., MASETTI N., PALAZZI E., PIAN E., STEFANON M., TESTA V. and TRISTRAM P.J.

Abstract (from CDS):

GRB021004 is one of the best sampled gamma-ray bursts (GRB) to date, although the nature of its light curve is still being debated. Here we present 107 new optical, near-infrared (NIR) and millimetre observations, ranging from 2h to more than a year after the burst. Fitting the multiband data to a model based on multiple energy injections suggests that at least 7 refreshed shocks took place during the evolution of the afterglow, implying a total energy release (collimated within an angle of 1.8deg) of ∼8x1051erg. Analysis of the late photometry reveals that the GRB021004 host is a low extinction (AV∼0.1) starburst galaxy with MB≃-22.0.

Abstract Copyright: ∼

Journal keyword(s): gamma rays: bursts - galaxies: fundamental parameters - techniques: photometric

Nomenclature: Fig.1, Table 1: [DCG2005] NN (Nos 1-10).

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 GRB 021004 gB 00 26 54.68 +18 55 41.6           ~ 547 0
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 11141 1
3 QSO B0109+224 BLL 01 12 05.8247044608 +22 44 38.785880796   16.00 15.66 15.47   ~ 343 2
4 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17421 0
5 EM* MWC 349 ** 20 32 45.499080 +40 39 36.74124   15.88 13.15 12.13   Bep 799 0

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