image overlap message for exposure 3 of trigger 1351790
uvot_overlap.pl vrs. 2010-12-20b fem started at 250924d21h36m43s886315usUT
The observation of trigger 1351790 started 2025-09-24T08:33:24.5
Examining file ./1351790_g894_uvot_sky_image.fits
The exposure ID is 780395604
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (51.8849,74.6634) with a roll angle of 51.6
It is square with sides of 2.68 arc min. for an area of 7.17 sq arc min
The BAT error circle is centered at (51.8650,74.6520) with a radius of 3.000 arc min
This is 0.753 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 7.17 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (51.8724,74.6585) with a radius of 0.037 arc min
This is 0.356 arc min from the center of the uvot region
The area of the XRT error circle is 0.004 sq. arc min
The UVOT/XRT overlap is 0.004 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 3 of trigger 1351790
find_uvot_ag.pl vrs. 2023-04-25a fem started at 250924d21h37m07s179255usUT
Observation start time is 2025-09-24T08:33:24.5
Examining file ./1351790_g894_uvot_catalog_image.fits
The exposure ID is 780395604
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 30 detected source(s) for 1351790_g894
Aspect correction adds 0.00488 degrees (1.171 sec of time = 4.65 arc sec) to RA
Aspect correction adds 0.00047 degrees ( 1.69 arcsec) to Dec
Total aspect correction is 4.94 arcsec
Star catalogs centered at 51.8788 , 74.6631 with radius 2.66 arc min.
n_usno: 124 n_gsc: 132
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.826
RA DEC Mag Color
bright star 0: 51.84171 (03:27:22.01) 74.62269 (+74:37:21.7) 11.83 GSC-V
Mean distance difference (CAT_DELTA) for 23 matched entries is 0.422" for 1351790_g894
Mean and std. dev of mag. difference (MAG_DELTA) are 0.929 and 0.452 for 1351790_g894
Found 7 entries without IDs and 7 entries that are acceptable afterglow candidates for 1351790_g894.
Acceptable entries have no ID, XRT distances < 5.5", 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=51.8650 (03:27:27.60) DEC=74.6520 (+74:39:07.2)
XRT distances are from RA=51.8724 (03:27:29.37) DEC=74.6585 (+74:39:30.5)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1351790_g894 with genie
ra=51.87320 (03:27:29.57) dec=74.65940 (+74:39:33.8) +/- 0.7" mag=19.44+/-0.17
dist=3.4 REFID=21 major=1.1 minor=1.0 flag=0
Found 2 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
51.8840 74.6637 18.6 -1 USNO-B1 18.83 16.93 17.77
51.8843 74.6636 18.6 -1 GSC2.3 17.12 18.75 17.64
uvot_check_outside found 13 of 13 good pixels
##### This source remains a candidate #####
It has no entries within 3.5" or brighter than 12 mag
-----------------
Entry 13 in the list of sources is a candidate afterglow for 1351790_g894 with genie
ra=51.92080 (03:27:40.99) dec=74.66552 (+74:39:55.9) +/- 0.7" mag=19.58+/-0.17
dist=52.6 REFID=14 major=2.1 minor=0.6 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 72.1 arc sec from the BAT position.
Found 2 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
51.9227 74.6650 2.6 -1 USNO-B1 99.99 19.27 99.99 *
51.9232 74.6649 3.2 -1 GSC2.3 19.56 21.81 99.99 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 19 in the list of sources is a candidate afterglow for 1351790_g894 with genie
ra=51.93812 (03:27:45.15) dec=74.66283 (+74:39:46.2) +/- 0.6" mag=18.44+/-0.15
dist=64.5 REFID=15 major=2.6 minor=1.9 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 79.8 arc sec from the BAT position.
Found 5 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
51.9227 74.6650 16.6 -1 USNO-B1 99.99 19.27 99.99
51.9422 74.6648 8.0 -1 USNO-B1 16.77 15.64 16.14
51.9540 74.6646 16.5 -1 USNO-B1 12.27 11.84 12.03 *
51.9232 74.6649 16.1 -1 GSC2.3 19.56 21.81 99.99
51.9540 74.6646 16.5 -1 GSC2.3 99.99 99.99 12.05
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 20 in the list of sources is a candidate afterglow for 1351790_g894 with genie
ra=51.94414 (03:27:46.59) dec=74.66054 (+74:39:37.9) +/- 0.6" mag=18.05+/-0.15
dist=68.7 REFID=19 major=2.8 minor=2.2 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 81.4 arc sec from the BAT position.
Found 3 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
51.9422 74.6648 15.3 -1 USNO-B1 16.77 15.64 16.14
51.9540 74.6646 17.5 -1 USNO-B1 12.27 11.84 12.03 *
51.9540 74.6646 17.5 -1 GSC2.3 99.99 99.99 12.05
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 23 in the list of sources is a candidate afterglow for 1351790_g894 with genie
ra=51.94892 (03:27:47.74) dec=74.66849 (+74:40:06.6) +/- 0.6" mag=18.88+/-0.15
dist=81.3 REFID=10 major=1.8 minor=1.4 flag=2 (blended)
*** The position of this source is inconsistent with the XRT position.
The position is 99.6 arc sec from the BAT position.
Found 7 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
51.9422 74.6648 14.9 -1 USNO-B1 16.77 15.64 16.14
51.9540 74.6646 14.7 -1 USNO-B1 12.27 11.84 12.03 *
51.9682 74.6676 18.6 -1 USNO-B1 16.21 14.76 15.40
51.9673 74.6709 19.4 -1 USNO-B1 20.29 19.04 19.59
51.9540 74.6646 14.7 -1 GSC2.3 99.99 99.99 12.05
51.9685 74.6676 18.9 -1 GSC2.3 14.66 15.76 15.04
51.9677 74.6708 19.7 -1 GSC2.3 18.91 20.57 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 24 in the list of sources is a candidate afterglow for 1351790_g894 with genie
ra=51.96091 (03:27:50.62) dec=74.66142 (+74:39:41.1) +/- 0.6" mag=17.24+/-0.14
dist=85.0 REFID=18 major=4.7 minor=2.7 flag=18 (blended+aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 97.4 arc sec from the BAT position.
This source is near the edge of image (0.910)
Found 2 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
51.9540 74.6646 13.3 -1 USNO-B1 12.27 11.84 12.03 *
51.9540 74.6646 13.3 -1 GSC2.3 99.99 99.99 12.05
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" or brighter than 12 mag
-----------------
Entry 28 in the list of sources is a candidate afterglow for 1351790_g894 with genie
ra=51.96417 (03:27:51.40) dec=74.66736 (+74:40:02.5) +/- 0.7" mag=19.12+/-0.16
dist=93.1 REFID=11 major=0.7 minor=0.4 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 109.4 arc sec from the BAT position.
This source is near the edge of image (0.993)
Found 7 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
51.9540 74.6646 13.7 -1 USNO-B1 12.27 11.84 12.03 *
51.9682 74.6676 4.0 -1 USNO-B1 16.21 14.76 15.40 *
51.9673 74.6709 12.9 -1 USNO-B1 20.29 19.04 19.59
51.9815 74.6702 19.4 -1 USNO-B1 20.87 19.24 19.96
51.9540 74.6646 13.7 -1 GSC2.3 99.99 99.99 12.05
51.9685 74.6676 4.2 -1 GSC2.3 14.66 15.76 15.04 *
51.9677 74.6708 12.7 -1 GSC2.3 18.91 20.57 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" or brighter than 12 mag
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=51.87320 (03:27:29.57) dec=74.65940 (+74:39:33.8) +/- 0.7" mag=19.44+/-0.17 dist=3.4 REFID=21 flag=0
There are 86357.062 counts in the bkg source region of 5769.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 14.969 counts/pixel (5-sig UL in 4" is 19.88 mag) for 1351790_g894
There are 997.54614 counts in the src source region of 51.000000 pixels.
Rate in src region with 4 arcsec radius is 19.560 counts/pixel for 1351790_g894
There are 15680.839 counts in the cand_src_bkg source region of 1047.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 14.977 counts/pixel (5-sig UL in 4" is 19.88 mag) for 1351790_g894
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 20.44, XRT distances < 5.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
Region file: 1351790_780395604_250924d21h37m07s179255usUT_bkg.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(51.8849,74.6634,45")
fk5;-circle(51.8731980452218,74.6593955187015,6")
fk5;-circle(51.8546647644051,74.6551471984493,6")
fk5;-circle(51.8568533968157,74.6537749710885,6")
fk5;-circle(51.8842120385235,74.6637570650661,6")
fk5;-circle(51.846071056363,74.6713991899774,6")
fk5;-circle(51.8635370873482,74.6747708006726,6")
fk5;-circle(51.9208037972297,74.66552482684,6")
fk5;-circle(51.9381173667036,74.6628272470854,6")
Region file: 1351790_780395604_250924d21h37m07s179255usUT_cand_src.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(51.8731980452218,74.6593955187015,4")
Region file: 1351790_780395604_250924d21h37m07s179255usUT_cand_bkg.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(51.8731980452218,74.6593955187015,25")
fk5;-circle(51.8731980452218,74.6593955187015,15")
fk5;-circle(51.8546647644051,74.6551471984493,6")
fk5;-circle(51.8568533968157,74.6537749710885,6")
fk5;-circle(51.8842120385235,74.6637570650661,6")
image paragraph message for exposure 3 of trigger 1351790
------ Start for Possible Stand-alone Circular ----
In response to GRB250924 (Swift/BAT trigger 1351790) at 08:18:29 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 858 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 03:27:29.57 = 51.87320
DEC(J2000) = +74:39:33.8 = 74.65940
with a 90%-confidence error radius of about 0.67 arc sec. This position is 3.4
arc sec. from the center of the XRT error circle. The estimated magnitude is
19.44 with a 1-sigma error of about 0.17. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.316.
------- notes for trigger 1351790 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 250924d21h37m11s894235usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1351790
-expid=780395604 -meonly -msg_image
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/1351790/
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 780395604.45624 or about 2025:268:08:33:19 UT
Found 1228 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 10% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 2 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 30 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 7 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.44 mag. Found 130 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 12% of the Genie image region. The
closest srclist source has ra= 51.8552 dec= 74.6552 mag=18.29 sep=20.22".
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?
780395604 858 WHITE srclist found no candidates.
780395604 858 WHITE 51.87320 74.65940 19.44/20.4 3.4 image Yes
List afterglow candidates for other finding charts.
780394938 192 WHITE 51.87355 74.65937 18.33/19.2 3.4 srclist Yes
780394938 192 WHITE 51.87340 74.65945 17.74/20.9 3.7 image Yes
780395096 350 U 51.87258 74.65915 18.79/18.1 2.4 srclist Yes
780395096 350 U 51.87351 74.65943 18.03/20.6 3.6 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 74.65940
GRB_ERROR: 0.67
GRB_RA: 51.87320
IMAGE_START_TIME: 08:33:19
MAGNITUDE: 19.44
MAG_ERROR: 0.17
MESSAGE_TYPE: ACK
SOURCE: XRT