srclist overlap message for exposure 3 of trigger 1418729
uvot_overlap.pl vrs. 2010-12-20b fem started at 251201d21h26m54s666288usUT
The observation of trigger 1418729 started 2025-12-01T16:41:35.0
Examining file ./1418729_g904_uvot_sky_srclist.fits
The exposure ID is 786300095
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (6.3844,-44.2370) with a roll angle of 234.9
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 (6.4090,-44.2370) with a radius of 3.000 arc min
This is 1.056 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 (6.3946,-44.2323) with a radius of 0.063 arc min
This is 0.520 arc min from the center of the uvot region
The area of the XRT error circle is 0.013 sq. arc min
The UVOT/XRT overlap is 0.013 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 3 of trigger 1418729
find_uvot_ag.pl vrs. 2023-04-25a fem started at 251201d21h27m19s811983usUT
Observation start time is 2025-12-01T16:41:35.0
Examining file ./1418729_g904_uvot_catalog_srclist.fits
The exposure ID is 786300095
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 63 detected source(s) for 1418729_g904
Aspect correction adds -0.00112 degrees (-0.269 sec of time = -2.89 arc sec) to RA
Aspect correction adds -0.00066 degrees (-2.38 arcsec) to Dec
Total aspect correction is 3.74 arcsec
Star catalogs centered at 6.3838 , -44.2396 with radius 8.13 arc min.
n_usno: 419 n_gsc: 570
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.4199
RA DEC Mag Color
bright star 0: 6.23973 (00:24:57.53) -44.23744 (-44:14:14.8) 11.42 GSC-F
Mean distance difference (CAT_DELTA) for 48 matched entries is 0.683" for 1418729_g904
Mean and std. dev of mag. difference (MAG_DELTA) are 0.948 and 0.757 for 1418729_g904
Found 15 entries without IDs and 1 entries that are acceptable afterglow candidates for 1418729_g904.
Acceptable entries have no ID, XRT distances < 9.5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA= 6.4090 (00:25:38.16) DEC=-44.2370 (-44:14:13.2)
XRT distances are from RA= 6.3946 (00:25:34.71) DEC=-44.2323 (-44:13:56.4)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1418729_g904 with 5x5 stamp
ra=6.39406 (00:25:34.57) dec=-44.23365 (-44:14:01.2) +/- 1.1" mag=17.47+/-0.35
dist=5.0 REFID=13
src: 0 distr. of nearby unmatched sources: 0 0 0 0 0
Found 1 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
6.3966 -44.2336 6.5 -1 GSC2.3 20.48 22.28 99.99
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
Found 1 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
6.3966 -44.2336 6.7 -1 GSC2.3 20.48 22.28 99.99
The closest star is 6.68" away.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=6.39406 (00:25:34.57) dec=-44.23365 (-44:14:01.2) +/- 1.1" mag=17.47+/-0.35 dist=5.0 REFID=13
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 < 9.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
srclist paragraph message for exposure 3 of trigger 1418729
------ Start for Possible Stand-alone Circular ----
In response to GRB251201 (Swift/BAT trigger 1418729) at 16:26:30 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 867 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 00:25:34.59 = 6.39413
DEC(J2000) = -44:14:01.0 = -44.23361
with a 90%-confidence error radius of about 0.61 arc sec. This position is 4.8
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.11 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.008.
------- notes for trigger 1418729 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 251201d21h27m22s407444usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1418729
-expid=786300095 -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/1418729/
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 786300095.01958 or about 2025:336:16:41:30 UT
Found 564 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 63 sources in
srclist catalog. Found 15 srclist source(s) without IDs. There are 1 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
Found 6 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 47 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 5% of the Genie image region.
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?
786300095 867 WHITE 6.39406 -44.23365 17.47/19.2 5.0 srclist Yes
786300095 867 WHITE 6.39413 -44.23361 17.11/20.9 4.8 image Yes
List afterglow candidates for other finding charts.
786299328 100 WHITE 6.39414 -44.23363 17.60/19.2 4.9 srclist Yes
786299328 100 WHITE 6.39413 -44.23364 17.28/20.8 4.9 image Yes
786299541 313 U 6.39415 -44.23379 16.97/18.1 5.4 srclist Yes
786299541 313 U 6.39414 -44.23365 16.52/20.6 4.9 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -44.23361
GRB_ERROR: 0.61
GRB_RA: 6.39413
IMAGE_START_TIME: 16:41:30
MAGNITUDE: 17.11
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT