University of Leicester
Browse
aah3567.pdf (249.1 kB)

The bright optical afterglow of the long GRB 001007

Download (249.1 kB)
journal contribution
posted on 2012-10-24, 09:05 authored by Castro Cerón J. M., A. J. Castro-Tirado, J. Gorosabel, O. Suárez, J. Hjorth, B. L. Jensen, H. Pedersen, J. U. Fynbo, M. I. Andersen, M. López-Corredoira, Y. Grosdidier, J. Casares, D. Pérez-Ramírez, B. Milvang-Jensen, G. Mallén-Ornelas, A. Fruchter, J. Greiner, E. Pian, P. M. Vreeswijk, L. Kaper, E. Rol, I. Salamanca, Van Den Heuvel E, S. D. Barthelmy, T. Cline, J. I. Trombka, F. Frontera, N. Masetti, E. Palazzi, S. Klose, C. Kouveliotou, D. H. Hartmann, K. Hurley, E. Mazets, H. S. Park, N. Tanvir, R. A. M. J. Wijers, G. G. Williams
We present optical follow up observations of the long GRB 001007 between 6.14 hours and ~468 days after the event. An unusually bright optical afterglow (OA) was seen to decline following a steep power law decay with index $\alpha$ = -2.03 $\pm$ 0.11, possibly indicating a break in the light curve at $t - t_{\rm0} <$ 3.5 days, as found in other bursts. Upper limits imposed by the LOTIS alerting system 6.14 hours after the gamma ray event provide tentative (1.2 $\sigma$) evidence for a break in the optical light curve. The spectral index $\beta$ of the OA yields -1.24 $\pm$ 0.57. These values may be explained both by several fireball jet models and by the cannonball model. Fireball spherical expansion models are not favoured. Late epoch deep imaging revealed the presence of a complex host galaxy system, composed of at least two objects located 1.2´´ (1.7 $\sigma$) and 1.9´´ (2.7 $\sigma$) from the afterglow position.

History

Citation

Astronomy & Astrophysics, 2002, 393 (2), pp. 445-451

Version

  • VoR (Version of Record)

Published in

Astronomy & Astrophysics

Publisher

EDP Sciences for European Southern Observatory (ESO)

issn

0004-6361

Copyright date

2002

Available date

2012-10-24

Publisher version

http://www.aanda.org/articles/aa/abs/2002/38/aah3567/aah3567.html

Language

en

Usage metrics

    University of Leicester Publications

    Categories

    Keywords

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC