Back

GCN Circular 25548

Subject

GRB 190828B: optical upper limit from 0.5m Savelli Robotic Telescope

Date

2019-08-29T14:35:27Z (5 years ago)

From

Andrea Melandri at INAF-OAB <andrea.melandri@brera.inaf.it>

A. Brosio (Oss. Astr. Savelli), A. Melandri (INAF-OAB), E. Palazzi (INAF-OAS), L. Nicastro (INAF-OAS), M.A. Tripodi (Oss. Astr. Savelli), S. Savaglio (UniCal) on behalf of a larger collaboration report:


We observed the field of GRB 190828B (Dichiara et al., GCN 25517Not found
 
 
) with the 0.5m Savelli Robotic Telescope (SRT) located at the Osservatorio Astronomico Lilio (Savelli, Italy). The observations were performed starting on 2019 August 28 at 19:19:22 UT (i.e. about 6.3 hours after the burst) and consisted of 24x300s exposures in the r-sdss band. 

No optical counterpart is detected nearby the XRT enhanced position (Beardmore et al., GCN 25521Not found
 
 
) in our stacked image, down to a 5sigma limiting magnitude of r>20.5, at a mean time of about 7.48 hours after the GRB. Calibration was performed against the SDSS catalog.