The very red afterglow of GRB 000418: Further evidence for dust extinction in a gamma-ray burst host galaxy
2000 | journal article. A publication with affiliation to the University of Göttingen.
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The very red afterglow of GRB 000418: Further evidence for dust extinction in a gamma-ray burst host galaxy
Klose, S.; Stecklum, B.; Masetti, N.; Pian, E.; Palazzi, E.; Henden, A. A. & Hartmann, D. H. et al. (2000)
The Astrophysical Journal, 545(1) pp. 271-276. DOI: https://doi.org/10.1086/317816
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Details
- Authors
- Klose, S.; Stecklum, B.; Masetti, N.; Pian, E.; Palazzi, E.; Henden, A. A.; Hartmann, D. H.; Fischer, O.; Gorosabel, J.; Sanchez-Fernandez, C.; Butler, D.; Ott, T.; Hippler, S.; Kasper, M.; Weiss, R.; Castro-Tirado, A.; Greiner, J.; Bartolini, C.; Guarnieri, A.; Piccioni, A.; Benetti, S.; Ghinassi, F.; Magazzu, A.; Hurley, K.; Cline, T.; Trombka, J.; McClanahan, T.; Starr, R.; Goldstein, J.; Gold, Ralf; Mazets, E.; Golenetskii, S.; Noeske, K.; Papaderos, P.; Vreeswijk, P. M.; Tanvir, N.; Oscoz, A.; Munoz, J. A.; Ceron, JMC
- Abstract
- We report near-infrared and optical follow-up observations of the afterglow of the GRB 000418 starting 2.5 days after the occurrence of the burst and extending over nearly 7 weeks. GRB 000418 represents the second case for which the afterglow was initially identified by observations in the near-infrared. During the first 10 days its R-band afterglow was well characterized by a single power-law decay with a slope of 0.86. However, at later times the temporal evolution of the afterglow flattens with respect to a simple power-law decay. Attributing this to an underlying host galaxy, we find its magnitude to be R = 23.9 and an intrinsic afterglow decay slope of 1.22. The afterglow was very red with R-K approximate to 4 mag. The observations can be explained by an adiabatic, spherical fireball solution and a heavy reddening due to dust extinction in the host galaxy. This supports the picture that (long) bursts are associated with events in star-forming regions.
- Issue Date
- 2000
- Status
- published
- Publisher
- Univ Chicago Press
- Journal
- The Astrophysical Journal
- ISSN
- 0004-637X