2006A&A...451...27M

Query : 2006A&A...451...27M

2006A&A...451...27M - Astronomy and Astrophysics, volume 45127-33 (2006/5-3)

Multi-wavelength analysis of the field of the dark burst GRB 031220.

MELANDRI A., GENDRE B., ANTONELLI L.A., GRAZIAN A., DE UGARTE POSTIGO A., GOROSABEL J., PIRO L., KOSUGI G., KAWAI N., DE PASQUALE M. and GARMIRE G.P.

Abstract (from CDS):

We have collected and analyzed data taken in different spectral bands (from X-ray to optical and infrared) of the field of GRB 031220 and we present results of such multiband observations. Comparison between images taken at different epochs in the same filters did not reveal any strong variable source in the field of this burst. X-ray analysis shows that only two of the seven Chandra sources have a significant flux decrease and seem to be the most likely afterglow candidates. Both sources do not show the typical values of the R-K' colour but they appear to be redder. However, only one source has an X-ray decay index (1.3±0.1) that is typical for observed afterglows. We assume that this source is the best afterglow candidate and we estimate a redshift of 1.90±0.30. Photometric analysis and redshift estimation for this object suggest that this GRB can be classified as a Dark Burst and that the obscuration is the result of dust extinction in the burst circum medium or inside the host galaxy.

Abstract Copyright: ∼

Journal keyword(s): gamma rays: bursts - gamma rays: observations - X-rays: general - galaxies: photometry

CDS comments: Table 1: numbering NN is not used in SIMBAD, objects are CXOU JHHMMSS.s+DDMMSS

Simbad objects: 18

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Number of rows : 18
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 GRB 000210 gB 01 59 15 -40 40.0           ~ 175 0
2 CXOU J043855.2+072457 X 04 38 55.23 +07 24 57.8           ~ 1 0
3 CXOU J043857.1+072448 X 04 38 57.14 +07 24 48.8           ~ 2 0
4 CXOU J043927.2+072351 X 04 39 27.23 +07 23 51.0           ~ 1 0
5 CXOU J043929.2+072314 X 04 39 29.20 +07 23 14.9           ~ 1 0
6 CXOU J043934.4+072124 X 04 39 34.49 +07 21 24.2           ~ 1 0
7 GRB 031220 gB 04 39.6 +07 22           ~ 22 0
8 CXOU J043939.7+072318 X 04 39 39.77 +07 23 18.6           ~ 2 0
9 CXOU J043944.3+072036 X 04 39 44.35 +07 20 36.7           ~ 2 0
10 CXOU J043946.1+072256 X 04 39 46.14 +07 22 56.5           ~ 2 0
11 CXOU J043946.4+072220 X 04 39 46.47 +07 22 20.2           ~ 2 0
12 CXOU J043954.8+072149 X 04 39 54.83 +07 21 49.3           ~ 2 0
13 CXOU J044003.7+072055 X 04 40 03.76 +07 20 55.3           ~ 2 0
14 2MASS J04401261+0719460 X 04 40 12.5959628136 +07 19 45.492813012           ~ 1 0
15 GRB 000131 gB 06 13 31.08 -51 56 41.7     24.7     ~ 172 1
16 GRB 970508 gB 06 53 49.2 +79 16 19           ~ 883 1
17 SN 2003dh SN* 10 44 50.030 +21 31 18.15     16.2     SNIcpec 1261 1
18 GRB 970828 gB 18 08 31.6 +59 18 51           ~ 353 1

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