TITLE:   GCN CIRCULAR
NUMBER:  32110
SUBJECT: GRB 220521A: ALMA detection
DATE:    22/05/24 21:30:44 GMT
FROM:    Tanmoy Laskar at U of Bath  <tanmoylaskar@gmail.com>

T. Laskar (University of Bath), S. Bhandari (ASTRON/JIVE), K. D. Alexander
(Northwestern), R. Margutti (Berkeley), E. Berger (Harvard), W. Fong
(Northwestern), R. Chornock (Berkeley), C. G. Mundell (University of Bath),
and P. Schady (University of Bath) report on behalf of a larger
collaboration:

"We observed GRB 220521A (Dichiara et al., GCN 32076) with the Atacama
Large Millimeter/Submillimeter Array (ALMA) at 97.5 GHz beginning on 2022
May 23 05:30 UT (1.26 days after the burst).

Preliminary analysis reveals a millimeter source with flux density of ~ 0.3
mJy at position:

RA (J2000) = 18:20:55.12 (+/- 0.03")
Dec (J2000) = 10:22:20.52 (+/- 0.03")

consistent with the X-ray position (Evans et al., GCN 32077) and optical
position (Malesani et al., GCN 32078).

We thank the JAO staff, AoD, P2G, and the entire ALMA team for their help
with these observations."