NOTE: uvot_fluxes_wget.pl vrs. 2020-11-03a fem at 210723d02h03m39s695951usUT
NOTE: Source region spec. is: 27.0302 -6.3471 3"
NOTE: Used archived uvot source position of  27.03020  -6.34710  3.00
NOTE: position reference is GCN_Notice
NOTE: A UVOT position was reported in GCN_Notice_Thu_22_Jul_21_21:02:31_UT
NOTE: Possible detection in uu at T+307.6
NOTE: Possible detection in wh at T+94.3
NOTE: Possible detection in bb at T+562.9
NOTE: Possible detection in w1 at T+685.6
NOTE: Possible detection in vv at T+636.7
NOTE: Possible detection in w2 at T+4908.0

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

GRB 210722A: Swift/UVOT Upper Limits

M. H. Siegel (PSU) and P. D'Avanzo (INAF-OAB)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 210722A
94 s after the BAT trigger (D'Avanzo et al., GCN Circ. 30475).
No optical afterglow consistent with the XRT position
*** POSITION REFERENCE is GCN_Notice ***
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 first
finding chart (FC) exposure and subsequent exposures are:

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

white_FC            94          244          147         >14.3
u_FC               308          557          246         >13.6
white               94         4902          550         >15.2
v                  637         1232           78         >14.7
b                  563         4697          274         >16.2
u                  308         1307          304         >13.8
w1                 686         1282           58         >14.3
w2                4908         4971           62         >16.7

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.027 in the direction of the burst
(Schlegel et al. 1998).


=========== Draft Detection Circular ========

GRB 210722A: Swift/UVOT Detection

M. H. Siegel (PSU) and P. D'Avanzo (INAF-OAB)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 210722A
94 s after the BAT trigger (D'Avanzo et al., GCN Circ. 30475).
A source consistent with the XRT position
*** POSITION REFERENCE is GCN_Notice ***
is detected in the initial UVOT exposures.

The preliminary UVOT position is:
    RA  (J2000) =  01:48:07.28 =  27.03033 (deg.)
    Dec (J2000) = -06:20:49.7  =  -6.34713 (deg.)
with an estimated uncertainty of 0.42 arc sec. (radius, 90% confidence).

Preliminary detections using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the early exposures are: 

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

white               94          244          147         14.31 +/- 0.02
v                  637          656           19         14.52 +/- 0.06
b                  563          583           20         14.65 +/- 0.04
u                  308          557          246         13.68 +/- 0.02
w1                 686          705           20         14.08 +/- 0.06
w2                4908         4971           62         17.08 +/- 0.14

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.027 in the direction of the burst
(Schlegel et al. 1998).