TITLE:   GCN CIRCULAR
NUMBER:  21441
SUBJECT: GMRT upper limit on the radio afterglow of GRB 170728B
DATE:    17/08/10 06:40:18 GMT
FROM:    Poonam Chandra at TIFR  <poonam@ncra.tifr.res.in>

Poonam Chandra & A. J. Nayana (NCRA-TIFR, India) report:

We observed the short hard burst GRB 170728B (Cenko et al., GCN Circ. 21371) with the Giant Metre Wave Radio Telescope (GMRT) at 1390 MHz band on 2017 August 09.61 UT, i.e. 11.65 days after the burst. We do not see any significant radio emission at the burst position (D’Avanzo et al. GCN Circ. 21373). The 3-sigma upper limit on the GRB radio flux density is 140 uJy.

We thank the GMRT staff for scheduling these observations.