image overlap message for exposure 2 of trigger 1413695
uvot_overlap.pl vrs. 2010-12-20b fem started at 251113d10h28m35s464715usUT
The observation of trigger 1413695 started 2025-11-12T21:34:35.9
Examining file ./1413695_g339_uvot_sky_image.fits
The exposure ID is 784676075
The exposure time is 249.946 (seconds)
The filter is U.
The uvot region is centered at (274.0135,24.2209) with a roll angle of 230.9
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 (274.0190,24.2260) with a radius of 3.000 arc min
This is 0.428 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 (274.0697,24.1535) with a radius of 0.068 arc min
This is 5.083 arc min from the center of the uvot region
The area of the XRT error circle is 0.015 sq. arc min
The UVOT/XRT overlap is 0.000 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1413695
find_uvot_ag.pl vrs. 2023-04-25a fem started at 251113d10h28m54s616608usUT
Observation start time is 2025-11-12T21:34:35.9
Examining file ./1413695_g339_uvot_catalog_image.fits
The exposure ID is 784676075
The exposure is 249.946 sec.
The bin size is 2 pixels
The filter is U
There are 14 detected source(s) for 1413695_g339
Aspect correction adds -0.00165 degrees (-0.397 sec of time = -5.43 arc sec) to RA
Aspect correction adds -0.00016 degrees (-0.57 arcsec) to Dec
Total aspect correction is 5.46 arcsec
Star catalogs centered at 274.0156 , 24.2189 with radius 2.62 arc min.
n_usno: 170 n_gsc: 161
*** WARNING -- XRT position is outside star catalog search region.
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 13 matched entries is 0.283" for 1413695_g339
Mean and std. dev of mag. difference (MAG_DELTA) are 1.317 and 0.361 for 1413695_g339
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1413695_g339.
Acceptable entries have no ID, XRT distances < 10.25", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
Magnitude criteria will be applied later.
BAT distances are from RA=274.0190 (18:16:04.56) DEC=24.2260 (+24:13:33.6)
XRT distances are from RA=274.0697 (18:16:16.72) DEC=24.1535 (+24:09:12.5)
-----------------
Entry 10 in the list of sources is a candidate afterglow for 1413695_g339 with genie
ra=274.00325 (18:16:00.78) dec=24.20574 (+24:12:20.6) +/- 1.3" mag=20.31+/-0.39
dist=288.0 REFID=13 major=1.2 minor=0.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 89.4 arc sec from the BAT position.
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
274.0057 24.2103 18.4 -1 USNO-B1 19.86 18.74 19.24
274.0013 24.2100 16.7 -1 USNO-B1 19.55 18.95 19.22
274.0007 24.2106 19.6 -1 USNO-B1 20.44 99.99 99.99
274.0016 24.2024 13.1 -1 USNO-B1 19.89 19.12 19.46
274.0040 24.2003 19.7 -1 USNO-B1 21.19 19.62 20.32
274.0057 24.2103 18.1 -1 GSC2.3 18.62 19.73 18.85
274.0014 24.2102 17.1 -1 GSC2.3 19.21 20.16 99.99
274.0004 24.2048 9.9 -1 GSC2.3 20.19 99.99 99.99
274.0016 24.2024 13.2 -1 GSC2.3 18.91 19.96 18.94
274.0041 24.2003 19.8 -1 GSC2.3 19.36 20.97 99.99
*** If XRT position is correct, then this is NOT the afterglow
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 35693.523 counts in the bkg source region of 5982.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 5.967 counts/pixel (5-sig UL in 4" is 19.50 mag) for 1413695_g339
Do not compute counts in XRT region because position is too far from center.
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.05, XRT distances < 10.25",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1413695_784676075_251113d10h28m54s616608usUT_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(274.0135,24.2209,45")
fk5;-circle(274.021193400381,24.2299193613572,6")
fk5;-circle(274.0209734571,24.2160353538961,6")
fk5;-circle(274.010508552256,24.2183565712994,6")
fk5;-circle(274.005915085706,24.2330690643656,6")
image paragraph message for exposure 2 of trigger 1413695
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no overlap
SRCLIST PROBLEM: srclist filled telemetry buffer
See notes for more details.
------ Start for Possible Stand-alone Circular ----
In response to GRB251112 (Swift/BAT trigger 1413695) at 21:28:55 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
303 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 none of the
XRT error circle. 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 0.158.
------- notes for trigger 1413695 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 251113d10h28m59s605092usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1413695
-expid=784676075 -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/1413695/
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.
*** Warning -- BAT and XRT error circles do NOT overlap.
UVOT exposure began at MET 784676075.93244 or about 2025:317:21:34:30 UT
Found 2036 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 17% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 51 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 14 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 20.05 mag. Found 166 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
16% of the Genie image region. The XRT position was OUTSIDE the star catalog
search region.
Genie image analysis:
Found 35693.5 counts in the large background region of 5982.0 pixels or a rate
of 5.967 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 19.29 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 18.30 mag. The closest srclist
source has ra= 274.0778 dec= 24.1591 mag=17.33 sep=33.54". The closest Genie
source has ra= 274.0323 dec= 24.2019 mag=20.33 sep=213.12".
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?
784676075 302 U srclist found no candidates.
784676075 302 U image found no candidates.
List afterglow candidates for other finding charts.
784675863 90 WHITE srclist found no candidates.
784675863 90 WHITE image found no candidates.
784676628 855 WHITE srclist found no candidates.
784676628 855 WHITE image found no candidates.
------- Tokens for Quick GCN -------