NOTE: uvot_fluxes_wget.pl vrs. 2020-11-03a fem at 210702d23h45m07s049804usUT
NOTE: Source region spec. is: 168.57793 -36.74723 3"
NOTE: Used archived uvot source position of 168.57793 -36.74723  3.00
NOTE: position reference is GCN_Circ_30356
NOTE: A UVOT position was reported in GCN_Circ_30356
NOTE: Possible detection in uu at T+316.2
NOTE: Possible detection in wh at T+104.4
NOTE: Possible detection in bb at T+3516.5
NOTE: Possible detection in w1 at T+5962.7
NOTE: Possible detection in vv at T+4131.9
NOTE: Possible detection in w2 at T+3927.2
NOTE: Possible detection in m2 at T+5757.6

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

GRB 210702A: Swift/UVOT Upper Limits

N. P. M. Kuin (UCL-MSSL) and A. Y. Lien (GSFC/UMBC)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 210702A
104 s after the BAT trigger (Lien et al., GCN Circ. 30351).
No optical afterglow consistent with the XRT position
(Lien et al. GCN Circ. 30351)
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           104          254          147         >15.5
white              104         3921          344         >15.5
v                 4132         4332          197         >15.3
b                 3516         3716          197         >15.6
u                  316          361           44         >11.5
w1                5963         6095          130         >15.8
m2                5758         5957          197         >15.9
w2                3927         4127          197         >16.0

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.121 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 210702A: Swift/UVOT Detection

N. P. M. Kuin (UCL-MSSL) and A. Y. Lien (GSFC/UMBC)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 210702A
104 s after the BAT trigger (Lien et al., GCN Circ. 30351).
A source consistent with the XRT position
(Lien et al. GCN Circ. 30351)
is detected in the initial UVOT exposures.

The preliminary UVOT position is:
    RA  (J2000) =  11:14:18.70 = 168.57793 (deg.)
    Dec (J2000) = -36:44:50.0  = -36.74723 (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              104          254          147         15.54 +/- 0.03
v                 4132         4332          197         15.42 +/- 0.03
b                 3516         3716          197         15.67 +/- 0.03
u                  316          361           44         11.64 +/- 0.05
w1                5963         6095          130         15.95 +/- 0.06
m2                5758         5957          197         16.06 +/- 0.06
w2                3927         4127          197         16.20 +/- 0.06

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.121 in the direction of the burst
(Schlegel et al. 1998).