[vsnet-grb-info 21649] GRB 190114C: ePESSTO NTT optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  23748
SUBJECT: GRB 190114C: ePESSTO NTT optical observations
DATE:    19/01/17 15:24:40 GMT
FROM:    Paolo D'Avanzo at INAF-OAB  <paolo.davanzo at brera.inaf.it>

F. Ragosta (U. Federico II/OACN), F. Olivares (MAS/U. de Chile), P. D'Avanzo (INAF-OAB), S. Campana, (INAF-OAB), M. De Pasquale (Istanbul Univ.), 
A. Melandri (INAF-OAB), E. Palazzi (INAF-OAS), S. Piranomonte (INAF-OAR), A. Rossi (INAF-OAS), O. Rodriguez (UNAB/MAS), G. Pignata (UNAB/MAS), 
Cristina Barbarino (Stockholm), Stefan Taubenberger (MPA-Garching), C. Inserra (Cardiff), E. Kankare (Turku), K. Maguire (QUB), S. J. Smartt (QUB), 
O. Yaron (Weizmann), D. R. Young (QUB), I. Manulis (Weizmann) report:


We observed the optical counterpart of GRB 190114C (Gropp et al., GCN Circ. 23688) under the extended Public ESO Spectroscopic Survey for Transient Objects 
(ePESSTO; see Smartt et al. 2015, A&A, 579, 40; http://www.pessto.org <http://www.pessto.org/>). The observations were performed on the ESO New Technology Telescope at La Silla with 
the EFOSC2 instrument in imaging mode starting at 04:36:53 UT on 2019-01-16 (i.e. about 1.32 days from the burst) and they were carried out with the g, r, i, z gunn 
filters. 

The optical afterglow is clearly detected in all bands. From preliminary photometry, we find a magnitude of r = 19.84 +/- 0.05 (AB, calibrated against the Pan-STARRS 
catalogue).