2005A&A...437L..23T


Query : 2005A&A...437L..23T

2005A&A...437L..23T - Astronomy and Astrophysics, volume 437, L23-25 (2005/7-2)

Early BVRcIc imaging and the discovery of the optical afterglow of GRB 041218.

TORII K., FUKAZAWA Y. and TSUNEMI H.

Abstract (from CDS):

We report early BVRcIc imaging of the INTEGRAL GRB 041218. The observation started 129 s after the burst and a sequence of exposures in V, Rc, Ic, and B bands were repeated. The optical afterglow is detected in Rc and I_ c_ bands while it was not detected in B and V. We find that the early afterglow deviates from a single power law decay and identify two characteristic timescales (breaks). Such breaks are theoretically expected from synchrotron cooling in the relativistic fireball (Sari et al., 1998ApJ...497L..17S) and we crudely constrain the physical condition of the relativistic shock.

Abstract Copyright:

Journal keyword(s): gamma rays: bursts

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 GRB 021004 gB 00 26 54.68 +18 55 41.6           ~ 519 0
2 GRB 041218 gB 01 39 07.6 +71 20 30           ~ 32 0
3 SN 2002lt SN* 08 08 59.858 +06 43 37.52           SNIc: 339 1
4 SN 2003dh SN* 10 44 50.030 +21 31 18.15     16.2     SNIcpec 1141 1
5 GRB 030418 gB 10 54 33.69 -07 01 40.8           ~ 65 0
6 GRB 990123 gB 15 25 29 +44 45.0     8.95     ~ 968 1

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2021.08.05-23:45:39

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