2009A&A...498...89G


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.09CET08:11:00

2009A&A...498...89G - Astronomy and Astrophysics, volume 498, 89-94 (2009/4-4)

The redshift and afterglow of the extremely energetic gamma-ray burst GRB 080916C.

GREINER J., CLEMENS C., KRUEHLER T., VON KIENLIN A., RAU A., SARI R., FOX D.B., KAWAI N., AFONSO P., AJELLO M., BERGER E., CENKO S.B., CUCCHIARA A., FILGAS R., KLOSE S., KUEPCUE YOLDAS A., LICHTI G.G., LOEW S., McBREEN S., NAGAYAMA T., ROSSI A., SATO S., SZOKOLY G., YOLDAS A. and ZHANG X.-L.

Abstract (from CDS):

The detection of GeV photons from gamma-ray bursts (GRBs) has important consequences for the interpretation and modelling of these most-energetic cosmological explosions. The full exploitation of the high-energy measurements relies, however, on accurate knowledge of the distance to the events. Here we report on the discovery of the afterglow and subsequent redshift determination of GRB 080916C, the first GRB detected by the Fermi Gamma-Ray Space Telescope with high significance detection of photons at energies >0.1GeV. Observations were done with the 7-channel ``Gamma-Ray Optical and Near-infrared Detector'' (GROND) at the 2.2m MPI/ESO telescope, the SIRIUS instrument at the Nagoya-SAAO 1.4m telescope in South Africa, and the GMOS instrument at Gemini-S. The afterglow photometric redshift of z=4.35±0.15, based on simultaneous 7-filter observations with GROND, places GRB 080916C among the top 5% most distant GRBs and makes it the most energetic GRB known to date. The detection of GeV photons from such a distant event is unexpected because of the predicted opacity due to interaction with the extragalactic background light. The observed gamma-ray variability in the prompt emission, together with the redshift, suggests a lower limit for the Lorentz factor of the ultra-relativistic ejecta of Γ>1090. This value rivals any previous measurements of Γ in GRBs and strengthens the extreme nature of GRB 080916C.

Abstract Copyright:

Journal keyword(s): techniques: photometric - gamma rays: bursts

CDS comments: Fig.1, Table 2 : photometric standards 1 to 5 are respectively in Simbad : 2MASS J07592897-5638238, 2MASS J07592738-5640099, 2MASS J07592397-5637080, 2MASS J07591980-5639250 and 2MASS J07591765-5637417.

Simbad objects: 20

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Number of rows : 20

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 071031 gB 00 25 37.40 -58 03 33.9           ~ 144 0
2 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9712 1
3 3B 940217 gB 01 56.3 +04 33           ~ 198 0
4 GRB 070802 gB 02 27 35.91 -55 31 39.1           ~ 138 0
5 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 15216 1
6 TYC 117-895-1 * 05 57 07.5600224981 +00 01 11.505514187 12.481 12.382 11.735 11.366 11.010 G5V 39 0
7 GRB 080129 gB 07 01 08.13 -07 50 47.8           ~ 69 0
8 2MASS J07591765-5637417 * 07 59 17.6470119607 -56 37 41.864177240           ~ 1 0
9 2MASS J07591980-5639250 * 07 59 19.8007232056 -56 39 25.104623039           ~ 1 0
10 GRB 080916C gB 07 59 23.24 -56 38 16.8           ~ 323 0
11 2MASS J07592397-5637080 * 07 59 23.9774072416 -56 37 08.042019486           ~ 1 0
12 2MASS J07592738-5640099 IR 07 59 27.3862465370 -56 40 10.030760551           ~ 1 0
13 2MASS J07592897-5638238 IR 07 59 28.9581444306 -56 38 23.808395114           ~ 1 0
14 BD-00 2081 * 08 52 34.0467451835 -00 39 48.969041815 10.403 10.297 10.140 10.062 9.978 A2 16 0
15 GRB 971214 gB 11 56 26.4 +65 12 01           ~ 434 1
16 GRB 080721 gB 14 57 55.76 -11 43 24.9           ~ 141 0
17 GRB 060418 gB 15 45 42.600 -03 38 20.00 15.73 16.19 14.98     ~ 326 0
18 4B 941017 gB 20 06.2 +09 49           ~ 90 0
19 GRB 060605 gB 21 28 37.320 -06 03 31.30   20.12 16.53     ~ 170 0
20 GRB 060607 gB 21 58 50.400 -22 29 46.70 18.49 16.67 15.09     ~ 263 0

    Equat.    Gal    SGal    Ecl

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2021.03.09-08:11:01

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