srclist overlap message for exposure 3 of trigger 1340514
uvot_overlap.pl vrs. 2010-12-20b fem started at 250807d16h18m09s825609usUT
The observation of trigger 1340514 started 2025-08-07T11:01:20.7
Examining file ./1340514_g911_uvot_sky_srclist.fits
The exposure ID is 776257280
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (51.4579,-47.8859) with a roll angle of 76.2
It is square with sides of 12.05 arc min. for an area of 145.15 sq arc min
The BAT error circle is centered at (51.4200,-47.8770) with a radius of 3.000 arc min
This is 1.614 arc min from the center of the uvot region
The area of the BAT error circle is 28.27 sq. arc min
The UVOT/BAT overlap is 28.27 sq. arc min or 1.00 of the BAT error circle
The XRT error circle is centered at (51.4480,-47.8876) with a radius of 0.033 arc min
This is 0.413 arc min from the center of the uvot region
The area of the XRT error circle is 0.003 sq. arc min
The UVOT/XRT overlap is 0.003 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 3 of trigger 1340514
find_uvot_ag.pl vrs. 2023-04-25a fem started at 250807d16h18m31s852248usUT
Observation start time is 2025-08-07T11:01:20.7
Examining file ./1340514_g911_uvot_catalog_srclist.fits
The exposure ID is 776257280
The exposure is 149.879 sec.
The bin size is 2 pixels
The filter is WHITE
There are 45 detected source(s) for 1340514_g911
Aspect correction adds 0.00171 degrees (0.410 sec of time = 4.12 arc sec) to RA
Aspect correction adds -0.00055 degrees (-1.97 arcsec) to Dec
Total aspect correction is 4.57 arcsec
Star catalogs centered at 51.4482 , -47.8798 with radius 7.99 arc min.
n_usno: 462 n_gsc: 359
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.6306
RA DEC Mag Color
bright star 0: 51.41453 (03:25:39.49) -47.86197 (-47:51:43.1) 11.63 GSC-F
Mean distance difference (CAT_DELTA) for 38 matched entries is 0.726" for 1340514_g911
Mean and std. dev of mag. difference (MAG_DELTA) are 1.760 and 1.175 for 1340514_g911
Found 7 entries without IDs and 1 entries that are acceptable afterglow candidates for 1340514_g911.
Acceptable entries have no ID, XRT distances < 5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
1 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=51.4200 (03:25:40.80) DEC=-47.8770 (-47:52:37.2)
XRT distances are from RA=51.4480 (03:25:47.51) DEC=-47.8876 (-47:53:15.4)
-----------------
Entry 3 in the list of sources is a candidate afterglow for 1340514_g911 with 3x3 stamp
ra=51.42919 (03:25:43.01) dec=-47.91879 (-47:55:07.6) +/- 1.1" mag=20.14+/-0.35
dist=121.0 REFID=44
*** The position of this source is inconsistent with the XRT position.
The position is 152.1 arc sec from the BAT position.
src: 3 distr. of nearby unmatched sources: 0 0 0 0 0
Found 5 entries in star catalog(s) within 20.0" of the candidate.
printing all entries
(Entries within 2 arc sec of a source list entry are considered a match)
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
51.4280 -47.9157 11.6 -1 USNO-B1 13.97 12.41 13.10 *
51.4243 -47.9158 16.0 -1 USNO-B1 19.83 19.45 19.62
51.4244 -47.9230 19.2 -1 USNO-B1 17.58 15.62 16.49
51.4279 -47.9157 11.6 -1 GSC2.3 12.68 13.48 99.99 *
51.4242 -47.9230 19.3 -1 GSC2.3 16.10 17.04 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are no candidates inside BAT error circle, but outside XRT error circle.
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.22, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
srclist paragraph message for exposure 3 of trigger 1340514
------ Start for Possible Stand-alone Circular ----
In response to GRB250807 (Swift/BAT trigger 1340514) at 10:46:08 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 876 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 03:25:47.56 = 51.44817
DEC(J2000) = -47:53:15.5 = -47.88764
with a 90%-confidence error radius of about 0.71 arc sec. This position is 0.5
arc sec. from the center of the XRT error circle. The estimated magnitude is
20.15 with a 1-sigma error of about 0.18. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.011.
------- notes for trigger 1340514 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 250807d16h18m34s143785usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1340514
-expid=776257280 -meonly -msg_srclist
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/1340514/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
XRT position found for srclist. XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 776257280.71162 or about 2025:220:11:01:15 UT
Found 458 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 45 sources in
srclist catalog. Found 7 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
Found 7 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 1 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.89 mag. Found 40 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 3% of the Genie image region. The
closest srclist source has ra= 51.4348 dec= -47.9070 mag=17.31 sep=76.87".
All AG candidates sorted by magnitude for the current finding chart.
(U/V/White SRCLIST mags < 17.5/17.5/18.5 are reliable. Mag > 18.5/18.5/19.5 are
not. Others are uncertain.)
(U/V/White Genie image mags < 18.0/18.0/19.0 are reliable. Mag > 19.0/19.0/20.0
are not. Others are uncertain.)
(Magnitudes followed by * have been corrected for exposure.)
---MET--- -dt- filter ---RA-- ---DEC--- -MAG/Limit Dist(") Source Asp.Corr?
776257280 875 WHITE srclist found no candidates.
776257280 875 WHITE 51.44817 -47.88764 20.15/20.9 0.5 image Yes
List afterglow candidates for other finding charts.
776256515 110 WHITE 51.44840 -47.88767 18.48/19.2 1.1 srclist Yes
776256515 110 WHITE 51.44829 -47.88782 17.98/21.0 1.1 image Yes
776256727 322 U srclist found no candidates.
776256727 322 U 51.44818 -47.88778 19.28/20.9 0.8 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -47.88764
GRB_ERROR: 0.71
GRB_RA: 51.44817
IMAGE_START_TIME: 11:01:15
MAGNITUDE: 20.15
MAG_ERROR: 0.18
MESSAGE_TYPE: ACK
SOURCE: XRT