image overlap message for exposure 2 of trigger 1409824
uvot_overlap.pl vrs. 2010-12-20b fem started at 251103d20h13m51s989352usUT
The observation of trigger 1409824 started 2025-11-03T17:01:39.2
Examining file ./1409824_g902_uvot_sky_image.fits
The exposure ID is 783882099
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (105.8806,-24.8738) with a roll angle of 114.2
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 (105.8640,-24.8430) with a radius of 3.000 arc min
This is 2.057 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 5.86 sq. arc min or 0.21 of the BAT error circle
The XRT error circle is centered at (105.8734,-24.8722) with a radius of 0.038 arc min
This is 0.406 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 2 of trigger 1409824
find_uvot_ag.pl vrs. 2023-04-25a fem started at 251103d20h14m13s939503usUT
Observation start time is 2025-11-03T17:01:39.2
Examining file ./1409824_g902_uvot_catalog_image.fits
The exposure ID is 783882099
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 38 detected source(s) for 1409824_g902
Aspect correction adds 0.00040 degrees (0.096 sec of time = 1.31 arc sec) to RA
Aspect correction adds -0.00145 degrees (-5.20 arcsec) to Dec
Total aspect correction is 5.37 arcsec
Star catalogs centered at 105.8837 , -24.8728 with radius 2.62 arc min.
n_usno: 213 n_gsc: 240
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 10.94328
RA DEC Mag Color
bright star 0: 105.87561 (07:03:30.15) -24.84824 (-24:50:53.7) 10.94 USNO-V
bright star 1: 105.92616 (07:03:42.28) -24.88686 (-24:53:12.7) 11.43 USNO-V
Mean distance difference (CAT_DELTA) for 31 matched entries is 0.439" for 1409824_g902
Mean and std. dev of mag. difference (MAG_DELTA) are 0.746 and 0.761 for 1409824_g902
Found 7 entries without IDs and 4 entries that are acceptable afterglow candidates for 1409824_g902.
Acceptable entries have no ID, XRT distances < 5.75", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
2 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=105.8640 (07:03:27.36) DEC=-24.8430 (-24:50:34.8)
XRT distances are from RA=105.8734 (07:03:29.61) DEC=-24.8722 (-24:52:19.8)
-----------------
Entry 30 in the list of sources is a candidate afterglow for 1409824_g902 with genie
ra=105.89705 (07:03:35.29) dec=-24.85656 (-24:51:23.6) +/- 0.7" mag=19.84+/-0.18
dist=95.6 REFID=6 major=0.7 minor=0.3 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 118.5 arc sec from the BAT position.
This source is near the edge of image (0.964)
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
105.8977 -24.8559 3.2 -1 USNO-B1 16.71 16.06 16.35 *
105.8964 -24.8532 12.2 -1 USNO-B1 20.40 18.48 19.33
105.8987 -24.8595 11.9 -1 GSC2.3 20.14 21.90 99.99
105.8976 -24.8559 3.1 -1 GSC2.3 15.50 16.60 99.99 *
105.8963 -24.8531 12.6 -1 GSC2.3 18.02 20.61 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
-----------------
Entry 32 in the list of sources is a candidate afterglow for 1409824_g902 with genie
ra=105.89979 (07:03:35.95) dec=-24.88409 (-24:53:02.7) +/- 0.6" mag=18.37+/-0.15
dist=96.3 REFID=33 major=3.6 minor=0.8 flag=2 (blended)
*** The position of this source is inconsistent with the XRT position.
The position is 188.5 arc sec from the BAT position.
Found 6 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
105.8979 -24.8806 14.0 -1 USNO-B1 18.78 18.17 18.44
105.9003 -24.8790 18.3 -1 USNO-B1 18.41 17.41 17.85
105.9049 -24.8849 17.0 -1 USNO-B1 13.09 11.44 12.17 *
105.8979 -24.8806 14.0 -1 GSC2.3 17.76 18.69 99.99
105.9002 -24.8790 18.3 -1 GSC2.3 16.95 18.34 99.99
105.9049 -24.8849 17.0 -1 GSC2.3 99.99 99.99 12.22
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 33 in the list of sources is a candidate afterglow for 1409824_g902 with genie
ra=105.90139 (07:03:36.33) dec=-24.88251 (-24:52:57.0) +/- 0.6" mag=18.85+/-0.15
dist=98.7 REFID=32 major=2.0 minor=1.9 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 187.5 arc sec from the BAT position.
Found 6 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
105.8979 -24.8806 13.2 -1 USNO-B1 18.78 18.17 18.44
105.9003 -24.8790 13.1 -1 USNO-B1 18.41 17.41 17.85
105.9049 -24.8849 14.3 -1 USNO-B1 13.09 11.44 12.17 *
105.8979 -24.8806 13.4 -1 GSC2.3 17.76 18.69 99.99
105.9002 -24.8790 13.2 -1 GSC2.3 16.95 18.34 99.99
105.9049 -24.8849 14.3 -1 GSC2.3 99.99 99.99 12.22
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 36 in the list of sources is a candidate afterglow for 1409824_g902 with genie
ra=105.90758 (07:03:37.82) dec=-24.88116 (-24:52:52.2) +/- 0.7" mag=19.99+/-0.19
dist=116.3 REFID=30 major=1.6 minor=1.2 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 197.8 arc sec from the BAT position.
This source is near the edge of image (0.933)
Found 4 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
105.9049 -24.8849 15.9 -1 USNO-B1 13.09 11.44 12.17 *
105.9114 -24.8831 14.4 -1 USNO-B1 19.66 18.41 18.97
105.9049 -24.8849 15.9 -1 GSC2.3 99.99 99.99 12.22
105.9114 -24.8831 14.1 -1 GSC2.3 17.93 19.41 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:
There are 64006.496 counts in the bkg source region of 5348.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 11.968 counts/pixel (5-sig UL in 4" is 20.00 mag) for 1409824_g902
There are 2338.8794 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 11.694 counts/pixel for 1409824_g902
There are 13914.613 counts in the xrt_bkg source region of 1120.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 12.424 counts/pixel (5-sig UL in 4" is 19.98 mag) for 1409824_g902
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 20.56, XRT distances < 5.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1409824_783882099_251103d20h14m13s939503usUT_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(105.8806,-24.8738,45")
fk5;-circle(105.872210433957,-24.8759485665932,6")
fk5;-circle(105.870187812134,-24.86481315698,6")
fk5;-circle(105.868352525573,-24.8772636227719,6")
fk5;-circle(105.88122430492,-24.8631827127405,6")
fk5;-circle(105.875196536027,-24.8820448690741,6")
fk5;-circle(105.883551361196,-24.8781457978115,6")
fk5;-circle(105.883798933161,-24.8620022968475,6")
fk5;-circle(105.878587663858,-24.8844704119051,6")
fk5;-circle(105.891304070017,-24.8782163000599,6")
fk5;-circle(105.893178769699,-24.873985292908,6")
fk5;-circle(105.895733700735,-24.8727760040112,6")
Region file: 1409824_783882099_251103d20h14m13s939503usUT_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(105.87338,-24.87217,8")
Region file: 1409824_783882099_251103d20h14m13s939503usUT_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(105.87338,-24.87217,25")
fk5;-circle(105.87338,-24.87217,15")
fk5;-circle(105.872210433957,-24.8759485665932,6")
fk5;-circle(105.870187812134,-24.86481315698,6")
fk5;-circle(105.868352525573,-24.8772636227719,6")
image paragraph message for exposure 2 of trigger 1409824
SRCLIST PROBLEM: srclist filled telemetry buffer
------ Start for Possible Stand-alone Circular ----
In response to GRB251103 (Swift/BAT trigger 1409824) at 16:46:36 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 866 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
0.256.
------- notes for trigger 1409824 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 251103d20h14m20s945935usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1409824
-expid=783882099 -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/1409824/
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 783882099.19844 or about 2025:308:17:01:34 UT
Found 2414 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 27% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 13 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 38 source(s) in Genie image catalog. Found 7 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.56 mag. Found 240 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 64006.5 counts in the large background region of 5348.0 pixels or a rate
of 11.968 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 19.83 mag. for a
4-arcsec aperture.
Found 2338.9 counts in the XRT position region of 200.0 pixels or a rate of
11.694 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.972 +/- 0.352 (1-sigma) cps. The
3-sigma UL at the XRT position is 1.055 cps or 19.55 mag. The number of srclist
sources filled the available telemetry. The weakest source detected was 18.66
mag. The closest srclist source has ra= 105.8671 dec= -24.8639 mag=13.86
sep=36.18". The closest Genie source has ra= 105.8722 dec= -24.8759 mag=16.86
sep=14.13".
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?
783882099 866 WHITE srclist found no candidates.
783882099 866 WHITE image found no candidates.
List afterglow candidates for other finding charts.
783881372 139 U srclist found no candidates.
783881372 139 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -24.87217
GRB_ERROR: 5.75
GRB_RA: 105.87338
IMAGE_START_TIME: 17:01:34
MAGNITUDE: 19.6
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT