[vsnet-grb-info 13414] GRB 130603B: optical follow-up and independent GTC redshift determination and afterglow spectrum
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Tue Jun 4 12:05:25 JST 2013
TITLE: GCN CIRCULAR
NUMBER: 14747
SUBJECT: GRB 130603B: optical follow-up and independent GTC redshift determination and afterglow spectrum
DATE: 13/06/04 03:05:17 GMT
FROM: Alberto Castro-Tirado at Inst.de Astro. de Andalucia <ajct at iaa.es>
R. Sánchez-Ramírez, A. J. Castro-Tirado (IAA-CSIC), J. Gorosabel
(IAA-CSIC, UPV-EHU), F. J. Aceituno (IAA-CSIC), E. Sonbas (Adiyaman
Univ.), E. Gogus, T. Güver (Sanbaci Univ.), H. Kirbiyik (TUG) and D.
García-Alvárez (GTC) on behalf of a larger collaboration, report:
We have observed the optical afterglow of the short-duration GRB 130603B
(Melandri et al. GCNC 14735, Norris et al. GCNC 14746). Optical images
have been obtained with the 1.0m telescope at the Tübitak National
Observatory (Antalya, Turkey) in the R-band and with the 1.5m telescope at
Observatorio de Sierra Nevada (Granada, Spain) in the I-band, starting on
June 3. 771 and June 3.854 UT (2.69 hr and 4.69 hr post burst)
respectively. Spectra covering the range 3500-10000 A were obtained with
the 10.4m GTC (+OSIRIS) starting on June 3.993 UT (i.e. 8 hr post burst).
At the position of the optical afterglow (Levan et al. GCNC 14742) the
afterglow spectrum shows Ca II in absorption, and we detect significant
contribution of the underlying host galaxy (eg. [OII], [OIII], H-beta and
H-alpha emission lines about 1 off), implying altogether a redshift of z
= 0.356, consistent with the values provided by Thoene et al. (GCNC
14744) and Foley et al. (GCNC 14745).
More information about the vsnet-grb-info
mailing list