[vsnet-grb-info 15584] GRB 140930B: Gemini South Spectroscopy

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  16873
SUBJECT: GRB 140930B: Gemini South Spectroscopy
DATE:    14/10/02 02:11:11 GMT
FROM:    S. Bradley Cenko at NASA/GSFC  <brad.cenko at nasa.gov>

S. B. Cenko, A. Cucchiara (NASA/GSFC), N. R. Tanvir (U. Leicester), A. J. Levan (U. Warwick), and D. A. Perley (Caltech) report on behalf of a larger collaboration:

We obtained a spectrum of the optical afterglow (Tanvir et al., GCN 16861; Fong et al., GCN 16863) of the short GRB 130930B (De Pasquale et al., GCN 16857) with the Gemini Multi-Object Spectrograph mounted on the 8 m Gemini South telescope.  Observations began at 4:01 UT on 2014 October 1 (8.3 hr after the Swift trigger) and cover the wavelength range from 3700-8300 A.

We detect a weak continuum trace at the location of the afterglow over most of the observed wavelength range (lambda >~ 4000 A), but no obvious emission or absorption features.