Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to https://gcn.nasa.gov.
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 31967

Subject
GRB 220427A: VLT/X-shooter photometry
Date
2022-04-29T10:10:21Z (2 years ago)
From
Antonio de Ugarte Postigo at OCA <deugarte@oca.eu>
A. de Ugarte Postigo (Artemis/OCA), H. Fausey (George Washington
University), D. A. Kann (HETH/IAA-CSIC), D. B. Malesani (Radboud
Univ. and DAWN/NBI), P. Jakobsson (U. of Iceland), A. Saccardi
(GEPI, Observatoire de Paris) and B. Schneider (CEA Paris-Saclay),
report on behalf of the Stargate Consortium:

We observed the field of GRB 220427A (D'Ai et al., GCN 31960)
using the ESO VLT UT3 (Melipal) equipped with the X-shooter
spectrograph. In images taken with the acquisition camera 7.9 hr
after the GRB we measure for the optical afterglow the following
AB magnitudes (calibrated against 2 field stars from the SkyMapper
catalogue):

g' = 22.40 +/- 0.09 mag
r' = 22.04 +/- 0.08 mag
z' = 20.81 +/- 0.08 mag

No useful spectroscopy could be secured.

We acknowledge excellent support from the ESO observing staff in
Paranal, in particular Jonathan Smoker and Rob van Holstein.
Looking for U.S. government information and services? Visit USA.gov