image overlap message for exposure 1 of trigger 1400964
uvot_overlap.pl vrs. 2010-12-20b fem started at 251003d11h33m08s673466usUT
The observation of trigger 1400964 started 2025-10-03T02:00:25.4
Examining file ./1400964_g114_uvot_sky_image.fits
The exposure ID is 781149625
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (18.5336,56.4966) with a roll angle of 11.5
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 (18.5030,56.5070) with a radius of 3.000 arc min
This is 1.188 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 (18.5293,56.4908) with a radius of 0.042 arc min
This is 0.377 arc min from the center of the uvot region
The area of the XRT error circle is 0.005 sq. arc min
The UVOT/XRT overlap is 0.005 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1400964
find_uvot_ag.pl vrs. 2023-04-25a fem started at 251003d11h33m13s248457usUT
Observation start time is 2025-10-03T02:00:25.4
Examining file ./1400964_g114_uvot_catalog_image.fits
The exposure ID is 781149625
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 35 detected source(s) for 1400964_g114
Aspect correction adds 0.00213 degrees (0.510 sec of time = 4.23 arc sec) to RA
Aspect correction adds 0.00124 degrees ( 4.46 arcsec) to Dec
Total aspect correction is 6.14 arcsec
Star catalogs centered at 18.5312 , 56.4955 with radius 2.69 arc min.
n_usno: 246 n_gsc: 259
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.6325
RA DEC Mag Color
bright star 0: 18.50173 (01:14:00.41) 56.52271 (+56:31:21.8) 11.63 USNO-V
Mean distance difference (CAT_DELTA) for 35 matched entries is 0.379" for 1400964_g114
Mean and std. dev of mag. difference (MAG_DELTA) are 0.975 and 0.548 for 1400964_g114
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1400964_g114.
Acceptable entries have no ID, XRT distances < 6.25", 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=18.5030 (01:14:00.72) DEC=56.5070 (+56:30:25.2)
XRT distances are from RA=18.5293 (01:14:07.02) DEC=56.4908 (+56:29:26.9)
-----------------
Entry 15 in the list of sources is a candidate afterglow for 1400964_g114 with genie
ra=18.52263 (01:14:05.43) dec=56.47328 (+56:28:23.8) +/- 0.7" mag=19.73+/-0.17
dist=64.5 REFID=34 major=1.3 minor=0.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 127.5 arc sec from the BAT position.
This source is near the edge of image (0.947)
Found 10 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
18.5204 56.4769 13.7 -1 USNO-B1 17.64 15.38 16.39
18.5250 56.4762 11.6 -1 USNO-B1 99.99 18.83 99.99
18.5229 56.4764 11.3 -1 USNO-B1 16.89 14.57 15.60
18.5243 56.4762 11.1 -1 USNO-B1 99.99 18.86 99.99
18.5219 56.4727 2.6 -1 USNO-B1 17.25 15.55 16.30 *
18.5153 56.4703 18.2 -1 USNO-B1 20.02 18.45 19.15
18.5199 56.4769 14.1 -1 GSC2.3 16.36 17.59 17.20
18.5233 56.4762 10.7 -1 GSC2.3 14.86 16.77 15.56
18.5219 56.4726 2.7 -1 GSC2.3 15.52 16.92 16.13 *
18.5153 56.4702 18.4 -1 GSC2.3 18.53 20.23 18.91
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 3 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
18.5258 56.4901 7.4 -1 USNO-B1 20.44 19.11 19.70
18.5309 56.4932 9.2 -1 GSC2.3 20.02 99.99 99.99
18.5259 56.4900 7.3 -1 GSC2.3 19.56 21.10 99.99
The closest star is 7.35" away.
List UVOT sources within 10" of the XRT position:
There are 49315.602 counts in the bkg source region of 5922.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 8.328 counts/pixel (5-sig UL in 4" is 20.20 mag) for 1400964_g114
There are 1680.8086 counts in the xrt source region of 198.00000 pixels.
Rate in xrt region with 8 arcsec radius is 8.489 counts/pixel for 1400964_g114
There are 9568.1885 counts in the xrt_bkg source region of 1156.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 8.277 counts/pixel (5-sig UL in 4" is 20.20 mag) for 1400964_g114
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 20.75, XRT distances < 6.25",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1400964_781149625_251003d11h33m13s248457usUT_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(18.5336,56.4966,45")
fk5;-circle(18.5275569623348,56.4841456985647,6")
fk5;-circle(18.5302318231073,56.4839711994238,6")
fk5;-circle(18.5322707251301,56.501251596352,6")
fk5;-circle(18.5421139046788,56.5036104866326,6")
fk5;-circle(18.5229971822933,56.5060081958129,6")
Region file: 1400964_781149625_251003d11h33m13s248457usUT_xrt.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(18.52925,56.49081,8")
Region file: 1400964_781149625_251003d11h33m13s248457usUT_xrt_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(18.52925,56.49081,25")
fk5;-circle(18.52925,56.49081,15")
fk5;-circle(18.5275569623348,56.4841456985647,6")
fk5;-circle(18.5302318231073,56.4839711994238,6")
image paragraph message for exposure 1 of trigger 1400964
SRCLIST PROBLEM: srclist filled telemetry buffer
------ Start for Possible Stand-alone Circular ----
In response to GRB251003 (Swift/BAT trigger 1400964) at 01:58:30 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 78 seconds after the BAT trigger. No credible afterglow candidate has
been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of
the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag.
The 8'x8' region for the list of sources generated on-board covers 100% of the
XRT error circle. The list of sources is typically complete to about 18 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.408.
------- notes for trigger 1400964 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 251003d11h33m19s287349usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1400964
-expid=781149625 -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/1400964/
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 781149625.43344 or about 2025:277:02:00:20 UT
Found 1368 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 24% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 56 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 35 source(s) in Genie image catalog. Found 1 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.75 mag. Found 253 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
24% of the Genie image region.
Genie image analysis:
Found 49315.6 counts in the large background region of 5922.0 pixels or a rate
of 8.328 counts/pixel in a radius of 45.0 arcsec. Based on this background, the
typical 5-sigma UL at a random point in the Genie image is 20.02 mag. for a
4-arcsec aperture.
Found 1680.8 counts in the XRT position region of 198.0 pixels or a rate of
8.489 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.280 +/- 0.295 (1-sigma) cps or
20.99 mag and a range from 20.21 to 99.99 mag. The 3-sigma UL at the XRT
position is 1.165 cps or 19.44 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 19.43 mag. The closest
srclist source has ra= 18.5265 dec= 56.4803 mag=17.80 sep=38.39". The closest
Genie source has ra= 18.5276 dec= 56.4841 mag=19.68 sep=24.23".
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?
781149625 78 WHITE srclist found no candidates.
781149625 78 WHITE image found no candidates.
List afterglow candidates for other finding charts.
781149837 290 U srclist found no candidates.
781149837 290 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 56.49081
GRB_ERROR: 6.25
GRB_RA: 18.52925
IMAGE_START_TIME: 02:00:20
MAGNITUDE: 19.4
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT