NOTE: uvot_fluxes_wget.pl vrs. 2018-11-07 fem at 190910d12h46m29s631982usUT
NOTE: Source region spec. is: 272.0314 +13.2515 3"
NOTE: Used archived uvot source position of 272.03140  13.25150  3.00
NOTE: position reference is GCN_Notice
NOTE: A UVOT position was reported in GCN_Notice_Tue_10_Sep_19_07:10:48_UT
NOTE: Possible detection in uu at T+264.0
NOTE: Possible detection in wh at T+105.1
NOTE: Possible detection in bb at T+520.0
NOTE: Possible detection in w1 at T+643.0
NOTE: Possible detection in vv at T+593.9
NOTE: Possible detection in w2 at T+569.7
NOTE: Possible detection in m2 at T+618.3

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

GRB 190910: Swift/UVOT Upper Limits

K. K. Simpson (PSU) and ***BA*** (***BA INSTITUTION***)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 190910
105 s after the BAT trigger (***Author*** et al., GCN Circ. ????).
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           105          255          147         >16.2
u_FC               264          514          246         >15.8
white              105         1695          400         >16.1
v                  594        12479         1395         >16.0
b                  520         7432          501         >16.5
u                  264         7235          756         >15.7
w1                 643         7031          510         >15.5
m2                 618        13169         1145         >15.6
w2                 570        11566         1395         >15.6

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.15 in the direction of the burst
(Schlegel et al. 1998).


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

GRB 190910: Swift/UVOT Detection

K. K. Simpson (PSU) and ***BA*** (***BA INSTITUTION***)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began settled observations of the field of GRB 190910
105 s after the BAT trigger (***Author*** et al., GCN Circ. ????).
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) =  18:08:07.54 = 272.03140 (deg.)
    Dec (J2000) = +13:15:05.8  =  13.25160 (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              105          255          147         16.24 +/- 0.03
v                  594          614           20         16.18 +/- 0.13
b                  520          540           20         16.60 +/- 0.09
u                  264          514          246         15.88 +/- 0.03
w1                 643          663           19         15.79 +/- 0.14
m2                 790          810           19         15.88 +/- 0.19
w2                 570          589           19         15.61 +/- 0.14

The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.15 in the direction of the burst
(Schlegel et al. 1998).