2005A&A...438..841M


Query : 2005A&A...438..841M

2005A&A...438..841M - Astronomy and Astrophysics, volume 438, 841-853 (2005/8-2)

Late-epoch optical and near-infrared observations of the GRB 000911 afterglow and its host galaxy.

MASETTI N., PALAZZI E., PIAN E., HUNT L., FYNBO J.P.U., GOROSABEL J., KLOSE S., BENETTI S., FALOMO R., ZEH A., AMATI L., ANDERSEN M.I., CASTRO-TIRADO A.J., CASTRO CERON J.M., DANZIGER J., FRONTERA F., FRUCHTER A.S., GREINER J., HJORTH J., JENSEN B.L., KAPER L., KOUVELIOTOU C., LEVAN A., MAGAZZU A., MOLLER P., NICASTRO L., PEDERSEN H., TANVIR N.R., VREESWIJK P.M., WIJERS R.A.M.J. and VAN DEN HEUVEL E.P.J.

Abstract (from CDS):

We present the results of an optical and near-infrared (NIR) monitoring campaign of the counterpart of Gamma-Ray Burst (GRB) 000911, located at redshift z=1.06, from 5-days to more than 13-months after explosion. Our extensive dataset is a factor of 2 larger and spans a time interval ∼4 times longer than the ones considered previously for this GRB afterglow; this allows a more thorough analysis of its light curve and of the GRB host galaxy properties. The afterglow light curves show a single power-law temporal decline, modified at late times by light from a host galaxy with moderate intrinsic extinction, and possibly by an emerging supernova (SN). The afterglow evolution is interpreted within the classical ``fireball'' scenario as a weakly collimated adiabatic shock propagating in the interstellar medium. The presence of a SN light curve superimposed on the non-thermal afterglow emission is investigated: while in the optical bands no significant contribution to the total light is found from a SN, the NIR J-band data show an excess which is consistent with a SN as bright as the known hypernova SN1998bw. If the SN interpretation is true, this would be the farthest GRB-associated SN, as well as the farthest core-collapse SN, discovered to date. However, other possible explanations of this NIR excess are also investigated. Finally, we studied the photometric properties of the host, and found that it is likely to be a slightly reddened, subluminous, extreme starburst compact galaxy, with luminosity ∼0.1L*, an age of ∼0.5Gyr and a specific Star Formation Rate (SFR) of ≃30M/yr/(L/L*). This is the highest specific SFR value for a GRB host inferred from optical/NIR data.

Abstract Copyright:

Journal keyword(s): gamma rays: bursts - supernovae: general - radiation mechanisms: non-thermal - cosmology: observations - galaxies: high-redshift - Galaxy: fundamental parameters

Simbad objects: 16

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Number of rows : 16
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 10530 1
2 SN 2002ap SN* 01 36 23.85 +15 45 13.2   13.11 14.54     SNIc-BL 547 1
3 M 74 G 01 36 41.7451236624 +15 47 01.107512304 10.52 10.00 9.46 9.16   ~ 1612 1
4 SN 2003gd SN* 01 36 42.65 +15 44 19.9     13.2     SNIIP 232 2
5 GRB 000210 gB 01 59 15 -40 40.0           ~ 167 0
6 [PBK2002] GRB 000911 Host Galaxy G 02 18 34.360 +07 44 27.65           ~ 7 0
7 GRB 000911 gB 02 18 42 +07 48.0           ~ 150 0
8 CPD-69 177 WD* 03 10 31.0195960176 -68 36 03.380768388 10.757 11.413 11.394 11.47 11.558 DA3.0 255 0
9 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16509 1
10 SN 2003lw SN* 08 02 30.1 -39 51 03       20.23   SNIc: 526 0
11 SN 2002lt SN* 08 08 59.858 +06 43 37.52           SNIc: 345 1
12 SN 2003dh SN* 10 44 50.030 +21 31 18.15     16.2     SNIcpec 1177 1
13 SN 1994D SN* 12 34 02.395 +07 42 05.70   11.75 12.03     SNIa 536 1
14 SN 1994I SN* 13 29 54.072 +47 11 30.50     12.9     SNIc 610 1
15 GRB 020405 gB 13 58 03.12 -31 22 22.2   21.9 21.5     ~ 242 1
16 SN 1998bw SN* 19 35 03.17 -52 50 46.1   14.09       SNIc 1764 2

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2023.01.31-08:32:40

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