2015A&A...583A..88N


Query : 2015A&A...583A..88N

2015A&A...583A..88N - Astronomy and Astrophysics, volume 583A, 88-88 (2015/11-1)

Identifying the host galaxy of the short GRB 100628A.

NICUESA GUELBENZU A., KLOSE S., PALAZZI E., GREINER J., MICHALOWSKI M.J., KANN D.A., HUNT L.K., MALESANI D., ROSSI A., SAVAGLIO S., SCHULZE S., XU D., AFONSO P.M.J., ELLIOTT J., FERRERO P., FILGAS R., HARTMANN D.H., KRUEHLER T., KNUST F., MASETTI N., OLIVARES E.F., RAU A., SCHADY P., SCHMIDL S., TANGA M., UPDIKE A.C. and VARELA K.

Abstract (from CDS):

We report on the results of a comprehensive observing campaign to reveal the host galaxy of the short GRB 100628A. This burst was followed by a faint X-ray afterglow but no optical counterpart was discovered. However, inside the X-ray error circle a potential host galaxy at a redshift of z=0.102 was soon reported in the literature. If this system is the host, then GRB 100628A was the cosmologically most nearby unambiguous short burst with a measured redshift so far. We used the multi-colour imager GROND at the ESO/La Silla MPG 2.2 m telescope, ESO/VLT spectroscopy, and deep Australia Telescope Compact Array (ATCA) radio-continuum observations together with publicly available Gemini imaging data to study the putative host and the galaxies in the field of GRB 100628A. We confirm that inside the X-ray error circle the most probable host-galaxy candidate is the morphologically disturbed, interacting galaxy system at z=0.102. The interacting galaxies are connected by a several kpc long tidal stream, which our VLT/FORS2 spectroscopy reveals strong emission lines of [OII], [OIII], Hα and Hβ, characteristic for the class of extreme emission-line galaxies and indicative of ongoing star formation. The latter leaves open the possibility that the GRB progenitor was a member of a young stellar population. However, we indentify a second host-galaxy candidate slightly outside the X-ray error circle. It is a radio-bright, luminous elliptical galaxy at a redshift z=0.311. With a K-band luminosity of 2x1011L this galaxy resembles the probable giant elliptical host of the first well-localized short burst, GRB 050509B. If this is the host, then the progenitor of GRB 100628A was a member of an old stellar population.

Abstract Copyright:

Journal keyword(s): gamma-ray burst: individual: 100628A

Nomenclature: Table 1: [NKP2015] AN (Nos A, B1-B2, C-L).

CDS comments: Table 3 blobs not in SIMBAD.

Simbad objects: 13

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Number of rows : 13
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 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12107 1
2 GRB 071227 gB 03 52 31.09 -55 59 03.3           ~ 166 0
3 CD-32 5613 WD* 08 41 32.4290850497 -32 56 32.915823461   12.07 11.85 12.3   DA5.5 291 0
4 GRB 050509B gB 12 36 18.000 +29 01 24.00           ~ 300 1
5 2MASS J14182632-0233340 BLL 14 18 26.3272568400 -02 33 34.142899320 16.00 15.85 15.63 16.62   ~ 50 0
6 GRB 100628A gB 15 03 53.59 -31 39 50.4           ~ 44 0
7 LP 916-15 PM* 15 38 59.6479538952 -28 35 36.973634856   12.19 11.62     A 112 0
8 GRB 100418A gB 17 05 26.96 +11 27 41.9           ~ 168 0
9 CD-44 12736 PM* 18 36 25.9502475648 -44 18 36.907592904   10.83 10.22     G0 205 0
10 Fermi bn080905499 gB 19 10 39.10 -18 51 55.4           ~ 160 0
11 ICRF J193925.0-634245 Sy2 19 39 25.0245304992 -63 42 45.640373400   18.87 18.37 17.64   ~ 1138 1
12 CD-30 17706 WD* 20 10 56.8486912016 -30 13 06.627142663 11.654 12.286 12.242 12.311 12.381 DA3.1 239 0
13 GRB 061201 gB 22 08 32.060 -74 34 47.90           ~ 175 0

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2023.02.04-11:02:09

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