2006A&A...447L...5C


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.04CET20:36:14

2006A&A...447L...5C - Astronomy and Astrophysics, volume 447, L5-8 (2006/2-4)

Optical emission from GRB 050709: a short/hard GRB in a star-forming galaxy.

COVINO S., MALESANI D., ISRAEL G.L., D'AVANZO P., ANTONELLI L.A., CHINCARINI G., FUGAZZA D., CONCIATORE M.L., DELLA VALLE M., FIORE F., GUETTA D., HURLEY K., LAZZATI D., STELLA L., TAGLIAFERRI G., VIETRI M., CAMPANA S., BURROWS D.N., D'ELIA V., FILLIATRE P., GEHRELS N., GOLDONI P., MELANDRI A., MEREGHETTI S., MIRABEL I.F., MORETTI A., NOUSEK J., O'BRIEN P.T., PELLIZZA L.J., PERNA R., PIRANOMONTE S., ROMANO P. and ZERBI F.M.

Abstract (from CDS):

We present optical observations of the short/hard gamma-ray burst GRB050709, the first such event with an identified optical counterpart. The object is coincident with a weak X-ray source and is located inside a galaxy at redshift z=0.1606±0.0002. Multiband photometry allowed us to study the broad-band spectral energy distribution. Late-time monitoring places strong limits on any supernova simultaneous with the GRB. The host galaxy is not of early type. Spectra show that the dominant stellar population is relatively young (∼1Gyr), and that ongoing star formation is present at a level of 2-3(L/L*)x(M/yr). This is at least 2 orders of magnitude larger than that observed in the elliptical hosts of the short GRB050509B and GRB050724. This shows that at least some short GRBs originate in a young population. Short/hard GRB models based on the merger of a binary degenerate system are compatible with the host galaxy characteristics, although there is still the possibility of a connection between young stars and at least a fraction of such events.

Abstract Copyright:

Journal keyword(s): radiation mechanisms: non-thermal - gamma rays: bursts - gamma rays: individual GRB050709

Simbad objects: 11

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Number of rows : 11

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 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4563 2
2 2MASXI J1236128+285858 BiC 12 36 12.861 +28 58 58.10           ~ 23 1
3 GRB 050509B gB 12 36 18.000 +29 01 24.00           ~ 284 1
4 SN 1994I SN* 13 29 54.072 +47 11 30.50     12.9     SNIc 577 1
5 GRB 050813 gB 16 07 57.190 +11 14 57.80           ~ 124 1
6 [BDC2005] D G 16 24 44.381 -27 32 26.97           ~ 18 1
7 GRB 050724 gB 16 24 44.400 -27 32 27.90     19.70     ~ 391 1
8 PSR J1808-2024 Psr 18 08 39.32 -20 24 40.1           ~ 1134 2
9 SN 1998bw SN* 19 35 03.17 -52 50 46.1   14.09       SNIc 1674 2
10 CXOU J230126.9-385839 G 23 01 26.96 -38 58 39.5   22.22 21.22 21   ~ 16 1
11 GRB 050709 gB 23 01 26.960 -38 58 39.50           ~ 266 1

    Equat.    Gal    SGal    Ecl

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2021.03.04-20:36:14

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