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

GCN Circular 25651

GRB190829A: GROND detection of the accompanying SN
2019-09-04T10:14:13Z (5 years ago)
Jan Bolmer at MPE/Garching <>
J. Bolmer, J. Greiner, and T.-W. Chen (all MPE) report

We have been using GROND (Greiner et al. 2008, PASP 120, 405) to follow up the
afterglow of GRB 190829A (Dichiara et al., GCN 25552) at z=0.08 (Valeev et al.,
GCN 25565).
The light of the optical transient has been fading in all GROND bands during the first 
days, was then flattening and is now finally showing a relativley sharp rise in all seven
GROND bands (e.g. about 0.5 mag in z' to 19.55 +/- 0.03 mag_AB; 330s integration
time) between 4.5 and 5.5 days
after the BAT trigger. This behavior can be interpreted as the 
upcoming supernova component.

Further spectroscopic follow up is encouraged.
Looking for U.S. government information and services? Visit