Skip to main content
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 35878

GRB 240218A: ALMA detection
2024-03-05T21:41:49Z (a month ago)
Tanmoy Laskar at U of Bath <>
legacy email
T. Laskar, C. Peña (Utah), G. Schroeder (Northwestern), and K. D. Alexander
(Arizona) report on behalf of a larger collaboration:

"We observed GRB 240218A (Page et al., GCN 35742; Veres et al., GCN 35755;
Svinkin et al., GCN 35758) with the Atacama Large Millimeter/Submillimeter
Array (ALMA) at 97.5 GHz beginning on 2024 March 02 02:46:33 UT (13.0 d
after the burst). ALMA observations of this burst were delayed due to
ALMA's annual February shutdown.

Preliminary analysis reveals a mm source with flux density of ~ 0.1 mJy at
97.5 GHz and position:

RA (J2000) = 10:47:11.5
Dec (J2000) = 1:16:36.0

with uncertainty ~ 0.3" in each coordinate, consistent with the X-ray
position (Evans et al. GCN 35748) and radio position (Schroeder et al., GCN

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

Looking for U.S. government information and services? Visit