2003A&A...406L..33D


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.12CEST12:36:41

2003A&A...406L..33D - Astronomy and Astrophysics, volume 406, L33-37 (2003/8-1)

Evidence for supernova signatures in the spectrum of the late-time bump of the optical afterglow of GRB021211.

DELLA VALLE M., MALESANI D., BENETTI S., TESTA V., HAMUY M., ANTONELLI L.A., CHINCARINI G., COCOZZA G., COVINO S., D'AVANZO P., FUGAZZA D., GHISELLINI G., GILMOZZI R., LAZZATI D., MASON E., MAZZALI P. and STELLA L.

Abstract (from CDS):

We present photometric and spectroscopic observations of the gamma-ray burst GRB021211 obtained during the late stages of its afterglow. The light curve shows a rebrightening occurring ∼25 days after the GRB. The analysis of a VLT spectrum obtained during the bump (27 days after the GRB) reveals a suggestive resemblance with the spectrum of the prototypical type-Ic SN1994I, obtained ∼10 days past maximum light. Particularly we have measured a strong, broad absorption feature at 3770Å, which we have identified with CaII blueshifted by ∼14400km/s, thus indicating that a supernova (SN) component is indeed powering the ``bump'' in the afterglow decay. Assuming SN1994I as a template, the spectroscopic and photometric data together indicate that the SN and GRB explosions were at most separated by a few days. Our results suggest that GRBs might be associated also to standard type-Ic supernovae.

Abstract Copyright:

Journal keyword(s): gamma rays: bursts - supernovae

Simbad objects: 10

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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 GRB 021004 gB 00 26 54.68 +18 55 41.6           ~ 515 1
2 SN 2002ap SN* 01 36 23.85 +15 45 13.2   13.11 14.54     SNIc-BL 491 1
3 SN 1984L SN* 02 35 30.54 -07 09 30.3   14.0       SNIb 190 1
4 SN 1999em SN* 04 41 27.04 -02 51 45.2   13.79 13.7     SNIIP 573 1
5 SN 2002lt SN* 08 08 59.858 +06 43 37.52           SNIc: 338 1
6 SN 2003dh SN* 10 44 50.030 +21 31 18.15     16.2     SNIcpec 1117 2
7 SN 1991bg SN* 12 25 03.70 +12 52 15.6   14.75 14.3     SNIapec 526 1
8 SN 1994I SN* 13 29 54.072 +47 11 30.50     12.9     SNIc 566 1
9 SN 1998bw SN* 19 35 03.17 -52 50 46.1   14.09       SNIc 1650 2
10 SN 1999ex SN* 22 16 07.27 -36 50 53.7   17.35       SNIb 123 2

    Equat.    Gal    SGal    Ecl

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2020.07.12-12:36:41

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