S.Q. Jiang (NAOC), Z.P. Zhu (NAOC,HUST), S.Y. Fu, X. Liu, D. Xu (NAOC),
(Urumqi No.1 Senior High School), J.Z. Liu (XAO) report:
We observed the field of GRB 220430A detected by Swift (Ambrosi et al.,
GCN 31972) and AGILE (Ursi et al., GCN 31975) using the NEXT-0.6m
telescope located at Nanshan, Xinjiang, China. Observations started at
14:13:38 UT on 2022-04-30 (i.e., 20.39 min after the BAT trigger). We
obtained 3x40, 6x60, 3x90, 6x200 s frames in the Sloan r-band and
3x60,3x90,6x200 s frames in Sloan z-band.
No optical source is detected in our stacked image at the XRT enhanced
position (Osborne et al., GCN 31973), with upper limits as follows
Tmid-T0 (hr) Filter UpperLimit (3sigma)
0.953 r >20.7
0.923 z >19.0
calibrated with the nearby PanSTARRS field.