NOTE: uvot_fluxes_wget.pl vrs. 2020-11-03a fem at 210216d21h15m27s164985usUT
NOTE: Source region spec. is: 156.17566 11.61138 3"
NOTE: Used archived opt source position of 156.17566  11.61138  3.00
NOTE: position reference is GCN_Circ-29508

=========== Draft Upper Limit Circular ========

GRB 210212B: Swift/UVOT Upper Limits

J. D. Gropp (PSU) reports on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 210212B
390642 s after the IPN trigger (***Author*** et al., GCN Circ. ????).
No optical afterglow consistent with the optical position
*** POSITION REFERENCE is GCN_Circ-29508 ***
is detected in the initial UVOT exposures.
Preliminary 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the initial exposures are:

Filter         T_start(s)   T_stop(s)      Exp(s)         Mag

w2              390642       397512         2887         >22.0

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.028 in the direction of the burst
(Schlegel et al. 1998).