srclist overlap message for exposure 2 of trigger 1400964
uvot_overlap.pl vrs. 2010-12-20b fem started at 251003d11h33m08s178706usUT
The observation of trigger 1400964 started 2025-10-03T02:03:57.4
Examining file ./1400964_g326_uvot_sky_srclist.fits
The exposure ID is 781149837
The exposure time is undefined.
The filter is U.
The uvot region is centered at (18.5307,56.4976) with a roll angle of 11.5
It is square with sides of 8.03 arc min. for an area of 64.51 sq arc min
The BAT error circle is centered at (18.5030,56.5070) with a radius of 3.000 arc min
This is 1.075 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 28.44 sq. arc min or 1.01 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 0.412 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
srclist afterglow message for exposure 2 of trigger 1400964
find_uvot_ag.pl vrs. 2023-04-25a fem started at 251003d11h33m23s107663usUT
Observation start time is 2025-10-03T02:03:57.4
Examining file ./1400964_g326_uvot_catalog_srclist.fits
The exposure ID is 781149837
The exposure is 183.109 sec.
The bin size is 2 pixels
The filter is U
There are 128 detected source(s) for 1400964_g326
Aspect correction adds 0.00209 degrees (0.502 sec of time = 4.16 arc sec) to RA
Aspect correction adds 0.00112 degrees ( 4.03 arcsec) to Dec
Total aspect correction is 5.79 arcsec
Star catalogs centered at 18.5533 , 56.5045 with radius 6.40 arc min.
n_usno: 1345 n_gsc: 1478
*** WARNING -- bright star catalog has 4 entries brighter than 12 mag
The brightest has mag 9.5966
RA DEC Mag Color
bright star 0: 18.50173 (01:14:00.41) 56.52271 (+56:31:21.8) 11.63 USNO-V
bright star 1: 18.60326 (01:14:24.78) 56.54788 (+56:32:52.4) 11.43 USNO-V
bright star 2: 18.58047 (01:14:19.31) 56.45323 (+56:27:11.6) 10.80 USNO-V
bright star 3: 18.48781 (01:13:57.07) 56.59207 (+56:35:31.4) 9.60 USNO-V
Mean distance difference (CAT_DELTA) for 87 matched entries is 0.817" for 1400964_g326
Mean and std. dev of mag. difference (MAG_DELTA) are 2.320 and 0.633 for 1400964_g326
Found 41 entries without IDs and 8 entries that are acceptable afterglow candidates for 1400964_g326.
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.
29 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)
*** WARNING 32 per cent of entries have no IDs.
-----------------
Entry 25 in the list of sources is a candidate afterglow for 1400964_g326 with 3x3 stamp
ra=18.50790 (01:14:01.90) dec=56.45878 (+56:27:31.6) +/- 1.1" mag=19.06+/-0.35
dist=122.9 REFID=107
*** The position of this source is inconsistent with the XRT position.
The position is 173.9 arc sec from the BAT position.
src: 25 distr. of nearby unmatched sources: 1 0 0 0 0
Found 8 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
18.5159 56.4604 17.0 -1 USNO-B1 16.35 14.48 15.31
18.5033 56.4635 19.3 -1 USNO-B1 16.21 14.14 15.06
18.5083 56.4599 4.2 -1 USNO-B1 17.81 19.35 18.67
18.5093 56.4584 3.1 -1 USNO-B1 18.09 15.63 16.72 *
18.5160 56.4603 16.9 -1 GSC2.3 14.36 15.81 15.10
18.5033 56.4634 18.9 -1 GSC2.3 14.01 15.74 14.61
18.5091 56.4585 2.6 -1 GSC2.3 15.90 18.07 16.90 *
18.5101 56.4582 4.9 -1 GSC2.3 99.99 19.70 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
-----------------
Entry 37 in the list of sources is a candidate afterglow for 1400964_g326 with 3x3 stamp
ra=18.45805 (01:13:49.93) dec=56.49610 (+56:29:46.0) +/- 1.1" mag=19.43+/-0.35
dist=142.8 REFID=112
*** The position of this source is inconsistent with the XRT position.
The position is 97.6 arc sec from the BAT position.
src: 37 distr. of nearby unmatched sources: 0 0 0 0 0
Found 9 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
18.4654 56.4962 14.5 -1 USNO-B1 99.99 18.09 99.99
18.4651 56.4965 14.2 -1 USNO-B1 20.07 18.41 19.14
18.4604 56.5000 14.8 -1 USNO-B1 16.75 15.12 15.85
18.4592 56.4968 3.5 -1 USNO-B1 15.61 14.29 14.88 *
18.4652 56.4964 14.3 -1 GSC2.3 18.54 20.34 19.02
18.4605 56.4999 14.6 -1 GSC2.3 15.27 16.49 15.61
18.4592 56.4967 3.3 -1 GSC2.3 14.22 15.29 14.64 *
18.4543 56.4986 11.6 -1 GSC2.3 20.35 99.99 99.99
18.4536 56.4920 17.2 -1 GSC2.3 19.78 99.99 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
-----------------
Entry 39 in the list of sources is a candidate afterglow for 1400964_g326 with 3x3 stamp
ra=18.46121 (01:13:50.69) dec=56.50791 (+56:30:28.5) +/- 1.1" mag=19.50+/-0.35
dist=148.5 REFID=110
*** The position of this source is inconsistent with the XRT position.
The position is 83.1 arc sec from the BAT position.
src: 39 srclist_match has ID
src: 39 distr. of nearby unmatched sources: 0 0 0 0 0
Found 13 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
18.4690 56.5066 16.3 -1 USNO-B1 18.45 16.74 17.50
18.4655 56.5036 17.7 -1 USNO-B1 18.71 16.73 17.61
18.4630 56.5110 11.8 -1 USNO-B1 18.98 17.35 18.08
18.4609 56.5025 19.6 -1 USNO-B1 19.17 17.27 18.11
18.4593 56.5089 5.2 -1 USNO-B1 15.80 14.44 15.05
18.4555 56.5102 13.9 -1 USNO-B1 19.46 17.70 18.48
18.4691 56.5065 16.5 -1 GSC2.3 16.81 18.35 17.52
18.4655 56.5035 18.0 -1 GSC2.3 16.74 18.37 17.32
18.4631 56.5110 11.7 -1 GSC2.3 17.47 18.79 17.96
18.4610 56.5024 19.9 -1 GSC2.3 17.42 19.02 17.91
18.4608 56.5081 1.1 -1 GSC2.3 16.62 17.79 99.99 *
18.4586 56.5091 6.9 -1 GSC2.3 15.25 16.39 14.80
18.4552 56.5102 14.4 -1 GSC2.3 18.31 19.78 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
-----------------
Entry 40 in the list of sources is a candidate afterglow for 1400964_g326 with 3x3 stamp
ra=18.46063 (01:13:50.55) dec=56.50822 (+56:30:29.6) +/- 1.1" mag=18.51+/-0.35
dist=150.0 REFID=81
*** The position of this source is inconsistent with the XRT position.
The position is 84.3 arc sec from the BAT position.
src: 40 srclist_match has ID
src: 40 distr. of nearby unmatched sources: 0 0 0 0 0
Found 12 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
18.4690 56.5066 17.7 -1 USNO-B1 18.45 16.74 17.50
18.4655 56.5036 19.3 -1 USNO-B1 18.71 16.73 17.61
18.4630 56.5110 11.2 -1 USNO-B1 18.98 17.35 18.08
18.4593 56.5089 3.6 -1 USNO-B1 15.80 14.44 15.05 *
18.4555 56.5102 12.3 -1 USNO-B1 19.46 17.70 18.48
18.4515 56.5063 19.5 -1 USNO-B1 19.83 19.34 19.56
18.4691 56.5065 17.9 -1 GSC2.3 16.81 18.35 17.52
18.4655 56.5035 19.5 -1 GSC2.3 16.74 18.37 17.32
18.4631 56.5110 11.1 -1 GSC2.3 17.47 18.79 17.96
18.4608 56.5081 0.5 -1 GSC2.3 16.62 17.79 99.99 *
18.4586 56.5091 5.3 -1 GSC2.3 15.25 16.39 14.80
18.4552 56.5102 12.8 -1 GSC2.3 18.31 19.78 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
-----------------
Entry 73 in the list of sources is a candidate afterglow for 1400964_g326 with 3x3 stamp
ra=18.46122 (01:13:50.69) dec=56.53152 (+56:31:53.5) +/- 1.1" mag=19.12+/-0.35
dist=199.3 REFID=108
*** The position of this source is inconsistent with the XRT position.
The position is 121.2 arc sec from the BAT position.
src: 73 distr. of nearby unmatched sources: 0 0 0 0 0
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
18.4598 56.5290 9.6 -1 USNO-B1 20.44 18.25 19.22
18.4597 56.5311 3.3 -1 USNO-B1 15.50 13.14 14.19 *
18.4695 56.5288 19.2 -1 GSC2.3 20.26 99.99 99.99
18.4599 56.5287 10.5 -1 GSC2.3 19.04 99.99 99.99
18.4604 56.5311 2.1 -1 GSC2.3 13.53 15.49 14.67 *
18.4571 56.5308 8.7 -1 GSC2.3 16.55 17.68 16.22
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 95 in the list of sources is a candidate afterglow for 1400964_g326 with 3x3 stamp
ra=18.52493 (01:14:05.98) dec=56.55817 (+56:33:29.4) +/- 1.1" mag=18.21+/-0.35
dist=242.6 REFID=33
*** The position of this source is inconsistent with the XRT position.
The position is 189.3 arc sec from the BAT position.
src: 95 srclist_match has ID
src: 95 distr. of nearby unmatched sources: 0 0 0 0 0
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
18.5214 56.5569 8.4 -1 USNO-B1 19.46 17.82 18.55
18.5245 56.5587 2.0 -1 USNO-B1 15.78 13.64 14.59 *
18.5213 56.5567 8.8 -1 GSC2.3 18.13 19.51 18.81
18.5246 56.5586 1.8 -1 GSC2.3 13.55 15.35 14.16 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 102 in the list of sources is a candidate afterglow for 1400964_g326 with 3x3 stamp
ra=18.41358 (01:13:39.26) dec=56.51921 (+56:31:09.1) +/- 1.1" mag=18.92+/-0.35
dist=251.4 REFID=97
*** The position of this source is inconsistent with the XRT position.
The position is 183.0 arc sec from the BAT position.
src: 102 distr. of nearby unmatched sources: 0 0 0 0 0
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
18.4183 56.5166 13.2 -1 USNO-B1 15.91 14.76 15.27
18.4145 56.5201 3.6 -1 USNO-B1 14.38 13.24 13.75 *
18.4184 56.5165 13.6 -1 GSC2.3 14.80 15.57 15.18
18.4146 56.5200 3.4 -1 GSC2.3 13.46 14.48 14.06 *
18.4132 56.5220 10.1 -1 GSC2.3 15.85 16.56 16.11
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 109 in the list of sources is a candidate afterglow for 1400964_g326 with 3x3 stamp
ra=18.41326 (01:13:39.18) dec=56.52210 (+56:31:19.6) +/- 1.1" mag=18.31+/-0.35
dist=256.4 REFID=63
*** The position of this source is inconsistent with the XRT position.
The position is 186.4 arc sec from the BAT position.
src: 109 srclist_match has ID
src: 109 distr. of nearby unmatched sources: 0 0 1 0 0
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
18.4145 56.5201 7.7 -1 USNO-B1 14.38 13.24 13.75
18.4146 56.5200 8.2 -1 GSC2.3 13.46 14.48 14.06
18.4132 56.5220 0.4 -1 GSC2.3 15.85 16.56 16.11 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 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 no candidates inside BAT error circle, but outside XRT error circle.
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 17.95, XRT distances < 6.25",
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 2 of trigger 1400964
------ 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 183 seconds with the U filter starting
290 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 19.2 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 18.0 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 251003d11h33m26s681684usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1400964
-expid=781149837 -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/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 781149837.40892 or about 2025:277:02:03:52 UT
Found 1441 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 24% of the srclist region. Found 128 sources in
srclist catalog. Found 41 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
17.95 mag.
Found 23 source(s) in Genie image catalog. Found 0 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.37 mag. Found 256 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 10867.5 counts in the large background region of 6080.0 pixels or a rate
of 1.787 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 19.60 mag. for a
4-arcsec aperture.
Found 336.5 counts in the XRT position region of 198.0 pixels or a rate of
1.699 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.030 +/- 0.108 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.324 cps or 19.36 mag. The closest srclist
source has ra= 18.5116 dec= 56.4802 mag=18.87 sep=51.77". The closest Genie
source has ra= 18.5328 dec= 56.5012 mag=20.66 sep=38.17".
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?
781149837 290 U srclist found no candidates.
781149837 290 U image found no candidates.
List afterglow candidates for other finding charts.
781149625 78 WHITE srclist found no candidates.
781149625 78 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 56.49081
GRB_ERROR: 6.25
GRB_RA: 18.52925
IMAGE_START_TIME: 02:03:52
MAGNITUDE: 19.4
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT