The Rapid Decay of the Optical Emission from GRB 980326 and Its Possible Implications
P. Groot
(1)
,
T. Galama
(1)
,
P. Vreeswijk
(1)
,
R. Wijers
(2)
,
E. Pian
(3)
,
E. Palazzi
(3)
,
J. van Paradijs
(1, 4)
,
C. Kouveliotou
(5, 6)
,
J. Zand
(7)
,
J. Heise
(7)
,
C. Robinson
(4, 6)
,
N. Tanvir
(2)
,
C. Lidman
(8)
,
C. Tinney
(9)
,
M. Keane
(10)
,
M. Briggs
(4, 6)
,
K. Hurley
(11)
,
Jean-François Gonzalez
(8)
,
P. Hall
(12)
,
M. Smith
(10)
,
R. Covarrubias
(10)
,
P. Jonker
(1)
,
J. Casares
(13)
,
N. Masetti
(3)
,
F. Frontera
(3)
,
M. Feroci
(14)
,
L. Piro
(3)
,
E. Costa
(3)
,
R. Smith
(15)
,
B. Jones
(16)
,
D. Windridge
(16)
,
J. Bland-Hawthorn
(9)
,
S. Veilleux
(17)
,
M. Garcia
(18)
,
W. Brown
(18)
,
K. Stanek
(18)
,
A. Castro-Tirado
(19, 20)
,
J. Gorosabel
(19)
,
J. Greiner
(21)
,
K. Jäger
(22)
,
A. Böhm
(22)
,
K. Fricke
(22)
1
AI PANNEKOEK -
Astronomical Institute Anton Pannekoek
2 Institute of Astronomy [Cambridge]
3 CNR - Consiglio Nazionale delle Ricerche [Bologna]
4 Department of Physics, University of Alabama in Huntsville and National Space Science and Technology Center
5 USRA - Universities Space Research Association [Washington]
6 MSFC - NASA Marshall Space Flight Center
7 SRON - SRON Netherlands Institute for Space Research
8 ESO - European Southern Observatory [Santiago]
9 AAO - Anglo-Australian Observatory
10 CTIO - Cerro Tololo Inter-American Observatory
11 UC Berkeley - University of California [Berkeley]
12 Department of Physics and Astronomy [Toronto]
13 IAC - Instituto de Astrofisica de Canarias
14 IASF-Roma - Istituto di Astrofisica Spaziale e Fisica cosmica - Roma
15 University of Wales
16 University of Bristol [Bristol]
17 University of Maryland, Department of Astronomy, College Park, MD 20742, USA
18 Harvard--Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
19 LAEFF-INTA - Laboratorio de Astrofísica Espacial y Física Fundamental
20 IAA - Instituto de Astrofísica de Andalucía
21 AIP - Astrophysikalisches Institut Potsdam
22 Universitäts-Sternwarte Göttingen
2 Institute of Astronomy [Cambridge]
3 CNR - Consiglio Nazionale delle Ricerche [Bologna]
4 Department of Physics, University of Alabama in Huntsville and National Space Science and Technology Center
5 USRA - Universities Space Research Association [Washington]
6 MSFC - NASA Marshall Space Flight Center
7 SRON - SRON Netherlands Institute for Space Research
8 ESO - European Southern Observatory [Santiago]
9 AAO - Anglo-Australian Observatory
10 CTIO - Cerro Tololo Inter-American Observatory
11 UC Berkeley - University of California [Berkeley]
12 Department of Physics and Astronomy [Toronto]
13 IAC - Instituto de Astrofisica de Canarias
14 IASF-Roma - Istituto di Astrofisica Spaziale e Fisica cosmica - Roma
15 University of Wales
16 University of Bristol [Bristol]
17 University of Maryland, Department of Astronomy, College Park, MD 20742, USA
18 Harvard--Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
19 LAEFF-INTA - Laboratorio de Astrofísica Espacial y Física Fundamental
20 IAA - Instituto de Astrofísica de Andalucía
21 AIP - Astrophysikalisches Institut Potsdam
22 Universitäts-Sternwarte Göttingen
Jean-François Gonzalez
- Fonction : Auteur
- PersonId : 12100
- IdHAL : jean-francois-gonzalez
- ORCID : 0000-0001-9423-6062
- IdRef : 110270916
Résumé
We report the discovery of the optical counterpart to GRB 980326. Its rapid optical decay can be characterized by a power law with exponent Ϫ and a constant underlying source at. Its optical 2.10 ע 0.13 R ϭ 25.5 ע 0.5 c colors 2.1 days after the burst imply a spectral slope of Ϫ. The gray spectrum as observed with 0.66 ע 0.70 BATSE shows that it is among the 4% softest bursts ever recorded. We argue that the rapid optical decay may be a reason for the nondetection of some low-energy afterglows of GRBs.
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Licence : CC BY - Paternité
Licence : CC BY - Paternité