Bibcode
DOI
Klose, S.; Stecklum, B.; Masetti, N.; Pian, E.; Palazzi, E.; Henden, A. A.; Hartmann, D. H.; Fischer, O.; Gorosabel, J.; Sánchez-Fernández, C.; Butler, D.; Ott, Th.; Hippler, S.; Kasper, M.; Weiss, R.; Castro-Tirado, A.; Greiner, J.; Bartolini, C.; Guarnieri, A.; Piccioni, A.; Benetti, S.; Ghinassi, F.; Magazzú, A.; Hurley, K.; Cline, T.; Trombka, J.; McClanahan, T.; Starr, R.; Goldsten, J.; Gold, R.; Mazets, E.; Golenetskii, S.; Noeske, K.; Papaderos, P.; Vreeswijk, P. M.; Tanvir, N.; Oscoz, A.; Muñoz, J. A.; Castro Cerón, J. M.
Referencia bibliográfica
The Astrophysical Journal, Volume 545, Issue 1, pp. 271-276.
Advertised on:
12
2000
Revista
Número de citas
60
Número de citas referidas
50
Descripción
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~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. Based on observations
collected at the Bologna Astronomical Observatory in Loiano, Italy; at
the TNG, Canary Islands, Spain; at the German-Spanish Astronomical
Centre, Calar Alto, operated by the Max-Planck-Institut for Astronomy,
Heidelberg, jointly with the Spanish National Commission for Astronomy;
at the US Naval Observatory; and at the UK Infrared Telescope.