GCN Circular 19601
Subject
GRB 160625B: TNG redshift confirmation
Event
Date
2016-06-27T09:51:06Z (10 years ago)
From
Valerio D'Elia at ASDC <delia@asdc.asi.it>
V. D�Elia (INAF-OAR/ASI-ASDC), A. Melandri (INAF-OAB) and D. Malesani (DARK/NBI) report on behalf of the CIBO collaboration:
We observed the afterglow of GRB 160625B (Dirirsa et al., GCN 19580) with the TNG equipped with DOLORES and the LR-B grism. The spectrum was acquired on 2016-06-26 and covers the range between 3000 and 7800 AA. The observation consisted of 2400 s exposure, starting at 23:04:20.836 (24 hr after the trigger).
The optical counterpart is clearly detected in the acquisition images with a magnitude r = 19.0 +/- 0.3 at the position reported by Troja et al. (GCN 19588) and Oates and D'A� (GCN 19589).
The spectrum shows a clear continuum. We detect absorption features consistent with Mg I, Mg II, Mn II and Fe II lines a redshift of z = 1.41 +/- 0.01, thus confirming the redshift reported by Xu et al. (GCN 19600).
We thanks the TNG staff for excellent support, in particular Luca di Fabrizio and Albar Garcia.