srclist overlap message for exposure 1 of trigger 1324646
uvot_overlap.pl vrs. 2010-12-20b fem started at 250616d02h49m44s915895usUT
The observation of trigger 1324646 started 2025-06-15T22:28:27.7
Examining file ./1324646_g187_uvot_sky_srclist.fits
The exposure ID is 771719307
The exposure time is undefined.
The filter is U.
The uvot region is centered at (290.3497,4.6735) with a roll angle of 40.8
It is square with sides of 17.13 arc min. for an area of 293.61 sq arc min
The BAT error circle is centered at (290.3440,4.6720) with a radius of 3.000 arc min
This is 0.354 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 (290.3857,4.6851) with a radius of 0.038 arc min
This is 2.261 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 1 of trigger 1324646
find_uvot_ag.pl vrs. 2023-04-25a fem started at 250616d02h49m47s544627usUT
Observation start time is 2025-06-15T22:28:27.7
Examining file ./1324646_g187_uvot_catalog_srclist.fits
The exposure ID is 771719307
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 190 detected source(s) for 1324646_g187
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 1.000
srclist_overlap returned: xrt_overlap 1.000
Dimmest detected source in 1324646_g187 has mag 18.92
Aspect correction adds 0.00101 degrees (0.242 sec of time = 3.61 arc sec) to RA
Aspect correction adds 0.00061 degrees ( 2.20 arcsec) to Dec
Total aspect correction is 4.23 arcsec
Star catalogs centered at 290.3890 , 4.6896 with radius 9.15 arc min.
n_usno: 4004 n_gsc: 4958
*** WARNING -- bright star catalog has 6 entries brighter than 12 mag
The brightest has mag 10.22064
RA DEC Mag Color
bright star 0: 290.40136 (19:21:36.33) 4.69129 (+04:41:28.6) 11.34 USNO-V
bright star 1: 290.35146 (19:21:24.35) 4.68129 (+04:40:52.6) 10.22 USNO-V
bright star 2: 290.45846 (19:21:50.03) 4.80901 (+04:48:32.4) 11.46 USNO-R
bright star 3: 290.34223 (19:21:22.14) 4.54644 (+04:32:47.2) 11.51 USNO-V
bright star 4: 290.37192 (19:21:29.26) 4.77876 (+04:46:43.5) 11.89 GSC-V
bright star 5: 290.49594 (19:21:59.03) 4.59587 (+04:35:45.1) 11.80 GSC-V
Mean distance difference (CAT_DELTA) for 168 matched entries is 0.902" for 1324646_g187
Mean and std. dev of mag. difference (MAG_DELTA) are 2.785 and 0.717 for 1324646_g187
Found 25 entries without IDs and 3 entries that are acceptable afterglow candidates for 1324646_g187.
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.
8 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=290.3440 (19:21:22.56) DEC= 4.6720 (+04:40:19.2)
XRT distances are from RA=290.3857 (19:21:32.56) DEC= 4.6851 (+04:41:06.5)
-----------------
Entry 1 in the list of sources is a candidate afterglow for 1324646_g187 with 1x1 stamp
ra=290.37541 (19:21:30.10) dec=4.68709 (+04:41:13.5) +/- 1.1" mag=18.52+/-0.35
dist=37.5 REFID=170
*** The position of this source is inconsistent with the XRT position.
The position is 125.1 arc sec from the BAT position.
src: 1 distr. of nearby unmatched sources: 0 0 0 0 0
Found 9 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
290.3785 4.6858 11.9 -1 USNO-B1 18.83 17.04 17.83
290.3758 4.6876 2.2 -1 USNO-B1 17.59 15.78 16.58 *
290.3754 4.6845 9.4 -1 USNO-B1 17.29 15.80 16.46
290.3735 4.6839 13.2 -1 USNO-B1 18.75 99.99 99.99
290.3784 4.6857 12.0 -1 GSC2.3 17.53 20.03 18.41
290.3758 4.6875 2.2 -1 GSC2.3 16.04 17.51 16.65 *
290.3755 4.6845 9.4 -1 GSC2.3 16.24 17.62 16.65
290.3734 4.6890 10.1 -1 GSC2.3 99.99 20.85 99.99
290.3734 4.6837 14.1 -1 GSC2.3 17.41 19.31 17.47
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 16 in the list of sources is a candidate afterglow for 1324646_g187 with 1x1 stamp
ra=290.38832 (19:21:33.20) dec=4.65993 (+04:39:35.8) +/- 1.1" mag=17.83+/-0.35
dist=91.2 REFID=144
*** The position of this source is inconsistent with the XRT position.
The position is 164.9 arc sec from the BAT position.
src: 16 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
290.3893 4.6631 11.8 -1 USNO-B1 18.78 16.91 17.74
290.3891 4.6609 4.4 -1 USNO-B1 15.35 14.05 14.63
290.3867 4.6609 6.9 -1 USNO-B1 18.34 17.04 17.62
290.3858 4.6610 9.9 -1 USNO-B1 18.66 16.86 17.65
290.3925 4.6595 15.2 -1 USNO-B1 18.83 17.44 18.05
290.3919 4.6578 15.0 -1 USNO-B1 19.01 18.36 18.65
290.3913 4.6639 17.9 -1 GSC2.3 99.99 21.26 99.99
290.3893 4.6631 12.1 -1 GSC2.3 17.55 20.06 99.99
290.3865 4.6628 12.1 -1 GSC2.3 99.99 20.97 99.99
290.3891 4.6608 4.2 -1 GSC2.3 13.75 15.06 13.66
290.3860 4.6610 9.1 -1 GSC2.3 16.95 18.92 18.14
290.3926 4.6595 15.5 -1 GSC2.3 18.04 20.13 18.81
290.3919 4.6578 15.0 -1 GSC2.3 99.99 20.76 99.99
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 41 in the list of sources is a candidate afterglow for 1324646_g187 with 3x3 stamp
ra=290.36181 (19:21:26.83) dec=4.64774 (+04:38:51.9) +/- 1.1" mag=17.53+/-0.35
dist=159.5 REFID=38
*** The position of this source is inconsistent with the XRT position.
The position is 108.2 arc sec from the BAT position.
src: 41 srclist_match has ID
src: 41 distr. of nearby unmatched sources: 0 0 0 0 0
Found 14 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
290.3621 4.6515 13.5 -1 USNO-B1 19.67 99.99 99.99
290.3665 4.6485 17.2 -1 USNO-B1 18.81 17.27 17.96
290.3614 4.6494 6.2 -1 USNO-B1 18.42 15.95 17.05
290.3618 4.6483 2.2 -1 USNO-B1 15.83 14.28 14.97 *
290.3600 4.6491 8.1 -1 USNO-B1 18.70 17.16 17.85
290.3603 4.6531 19.9 -1 GSC2.3 18.28 20.38 18.83
290.3622 4.6515 13.5 -1 GSC2.3 18.13 20.14 18.69
290.3665 4.6485 17.2 -1 GSC2.3 17.85 20.36 18.79
290.3585 4.6520 19.4 -1 GSC2.3 18.92 20.32 18.99
290.3613 4.6497 7.4 -1 GSC2.3 99.99 99.99 99.99
290.3619 4.6482 1.7 -1 GSC2.3 14.31 15.72 14.21 *
290.3598 4.6490 8.5 -1 GSC2.3 17.80 19.92 99.99
290.3586 4.6453 14.5 -1 GSC2.3 18.61 20.56 99.99
290.3620 4.6431 16.8 -1 GSC2.3 19.04 20.59 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
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
290.3880 4.6855 8.5 -1 GSC2.3 99.99 21.07 99.99
The closest star is 8.48" away.
List UVOT sources within 10" of the XRT position:
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.12, XRT distances < 5.75",
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 1 of trigger 1324646
SRCLIST PROBLEM: srclist filled telemetry buffer
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB250615 (Swift/BAT trigger 1324646) at 22:25:19 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
152 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 large, but uncertain, extinction expected.
------- notes for trigger 1324646 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 250616d02h49m54s442624usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1324646
-expid=771719307 -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/1324646/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for xrt position. XRT position found for srclist.
XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 771719307.65134 or about 2025:167:22:28:22 UT
Found 4401 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 36% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 25 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.12 mag.
Found 12 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 20.39 mag. Found 423 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
38% of the Genie image region.
Genie image analysis:
Found 19545.1 counts in the large background region of 6148.0 pixels or a rate
of 3.179 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 19.63 mag. for a
4-arcsec aperture.
Found 602.2 counts in the XRT position region of 196.0 pixels or a rate of
3.072 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.025 +/- 0.106 (1-sigma) cps or
22.15 mag and a range from 20.34 to 99.99 mag. The 3-sigma UL at the XRT
position is 0.343 cps or 19.30 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.92 mag. The closest
srclist source has ra= 290.3755 dec= 4.6847 mag=18.52 sep=36.36". The closest
Genie source has ra= 290.3815 dec= 4.6876 mag=19.87 sep=17.22".
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?
771719307 151 U srclist found no candidates.
771719307 151 U image found no candidates.
List afterglow candidates for other finding charts.
771720034 878 WHITE srclist found no candidates.
771720034 878 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 4.68514
GRB_ERROR: 5.75
GRB_RA: 290.38567
IMAGE_START_TIME: 22:28:22
MAGNITUDE: 19.3
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT