[vsnet-grb-info 28186] GRB 210619B: TNG NIR observations of the afterglow

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  30289
SUBJECT: GRB 210619B: TNG NIR observations of the afterglow
DATE:    21/06/21 13:02:39 GMT
FROM:    Paolo D'Avanzo at INAF-OAB  <pda.davanzo at gmail.com>

P. D'Avanzo (INAF-OAB), V. D'Elia (ASI-SSDC), A. Melandri, G. Tagliaferri (INAF-OAB), A. Rossi (INAF-OAS), 
L. Di Fabrizio, D. Carosati (INAF-TNG) on behalf of the CIBO collaboration report:

We observed the NIR afterglow of GRB 210619B (D'Avanzo et al., GCN Circ. 30261) with the Italian 3.6m TNG 
telescope equipped with the near-infrared camera NICS. A series of images were obtained with the J and K filters 
on 2021-06-21 from 01:27:06 UT to 02:49:36 UT (i.e. at a mid time of about 1.09 days after the burst). 

With preliminary photometry we derive the following magnitudes:

J = 17.90  +/- 0.05 
K = 16.43  +/- 0.11 
(Vega; calibrated against the 2MASS catalogue).