GRB 210702A: ALMA detection
Abstract
"We observed GRB 210702A (Lien et al. GCN 30351) with the Atacama Large Millimeter/Submillimeter Array (ALMA) at 97.5 GHz and 343.5 GHz beginning on 2021 July 03 21:05:52 UT (26.0 h after the burst). ALMA observations of this burst were delayed due to uninterruptible scheduled Cycle 8 software validation at the Observatory. Preliminary analysis reveals a mm source with flux density of ~ 0.1 mJy at 97.5 GHz and position: RA (J2000) = 11:14:18.807 Dec (J2000) = -36:44:49.25 with uncertainty ~ 0.03" in each coordinate, consistent with the X-ray position (D'Elia et al., GCN 30358) and optical position (Lien et al., GCN 30351; Kuin et al., GCN 30356). The spectrum appears strongly self-absorbed in the mm-band. Further observations are planned. We thank the JAO staff, AoD, P2G, and the entire ALMA team for their help with these observations."
- Publication:
-
GRB Coordinates Network
- Pub Date:
- July 2021
- Bibcode:
- 2021GCN.30423....1L