TITLE:   GCN CIRCULAR
NUMBER:  27432
SUBJECT: GRB 200324A: NOT optical upper limit
DATE:    20/03/24 23:47:48 GMT
FROM:    Daniele B Malesani at DTU Space  <malesani@space.dtu.dk>

Johan P. U. Fynbo (DAWN/NBI), Daniele B. Malesani (DTU Space), Abel de 
Burgos Sierra (NOT), Thomas Augusteijn (NOT), report on behalf of a 
larger collaboration:

On 2020 March 24.97 UT (6 hr 39 min after the trigger) we observed the 
field of GRB 200324A (Dichiara et al., GCN 27428; Beardmore et al., GCN 
27430) with the Nordic Optical Telescope equipped with ALFOSC in the 
SDSS r filter, for a total integration time of 300 s. We find no 
evidence for afterglow emission above a 3-sigma limit of about 23 mag. 
Our result is consistent with the non-detection by Stecklum et al. (GCN 
27431).