GCN Circular 29144
Subject
GRB 201221D: SMA submm observation
Event
Date
2020-12-23T02:49:57Z (5 years ago)
From
Yuji Urata at Nat. Central U. <urata@astro.ncu.edu.tw>
Huang, K. (CYCU), Urata, Y. (NCU) and Petitpas, G (SAO). report:
We observed the field of the GRB201221D (Page et al., GCN #29112) at
228 GHz using the Submillimeter Array (SMA). The observation was
started at 2020 December 11:27 UT (12.3 h after the burst). There was
no source at the candidate of optical afterglow (Malesani et al., GCN
#29117; Dichiara et al., GCN #29128; de Ugarte Postigo et al., GCN
#29132; Kilpatrick et al., GCN #29133; Rastinejad et al. GCN #29142).
The preliminary limit of the observation is ~0.2 mJy (rms).
We thank Ramprasad Rao, Mark Gurwell and staff of SMA for the
scheduling and execution of observations.