image overlap message for exposure 3 of trigger 1440319
uvot_overlap.pl vrs. 2010-12-20b fem started at 260114d12h01m31s821510usUT
The observation of trigger 1440319 started 2026-01-14T11:55:30.4
Examining file 1440319_g904_uvot_sky_image.fits
The exposure ID is 790084530
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (74.5959,-7.9987) with a roll angle of 233.6
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 (74.6020,-7.9940) with a radius of 3.000 arc min
This is 0.459 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 (74.5979,-8.0144) with a radius of 0.053 arc min
This is 0.953 arc min from the center of the uvot region
The area of the XRT error circle is 0.009 sq. arc min
The UVOT/XRT overlap is 0.009 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 3 of trigger 1440319
find_uvot_ag.pl vrs. 2023-04-25a fem started at 260114d12h01m32s758245usUT
Observation start time is 2026-01-14T11:55:30.4
Examining file 1440319_g904_uvot_catalog_image.fits
The exposure ID is 790084530
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 8 detected source(s) for 1440319_g904
Aspect correction adds -0.00207 degrees (-0.496 sec of time = -7.36 arc sec) to RA
Aspect correction adds 0.00028 degrees ( 1.01 arcsec) to Dec
Total aspect correction is 7.43 arcsec
Star catalogs centered at 74.5981 , -8.0015 with radius 2.47 arc min.
n_usno: 51 n_gsc: 36
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.76364
RA DEC Mag Color
bright star 0: 74.59614 (04:58:23.07) -7.96345 (-07:57:48.4) 11.76 USNO-V
Mean distance difference (CAT_DELTA) for 7 matched entries is 0.264" for 1440319_g904
Mean and std. dev of mag. difference (MAG_DELTA) are 1.120 and 0.383 for 1440319_g904
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1440319_g904.
Acceptable entries have no ID, XRT distances < 8", 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=74.6020 (04:58:24.48) DEC=-7.9940 (-07:59:38.4)
XRT distances are from RA=74.5979 (04:58:23.49) DEC=-8.0144 (-08:00:51.9)
-----------------
Entry 7 in the list of sources is a candidate afterglow for 1440319_g904 with genie
ra=74.57504 (04:58:18.01) dec=-8.00590 (-08:00:21.2) +/- 0.7" mag=20.28+/-0.20
dist=87.0 REFID=4 major=0.5 minor=0.3 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 105.2 arc sec from the BAT position.
This source is near the edge of image (0.924)
Found 2 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
74.5744 -8.0060 2.2 -1 USNO-B1 17.71 16.41 16.99 *
74.5745 -8.0060 1.9 -1 GSC2.3 16.50 17.72 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 47591.484 counts in the bkg source region of 6173.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 7.710 counts/pixel (5-sig UL in 4" is 20.24 mag) for 1440319_g904
There are 1582.5088 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 7.873 counts/pixel for 1440319_g904
XRT source is too far (57.0305098207666") from center -- do not compute local background.
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 20.80, XRT distances < 8",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1440319_790084530_260114d12h01m32s758245usUT_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(74.5959,-7.9987,45")
fk5;-circle(74.5902200836871,-7.99152693032611,6")
fk5;-circle(74.5876596218202,-7.98822342751385,6")
Region file: 1440319_790084530_260114d12h01m32s758245usUT_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(74.59788,-8.01442,8")
image paragraph message for exposure 3 of trigger 1440319
SRCLIST PROBLEM: srclist filled telemetry buffer
------ Start for Possible Stand-alone Circular ----
In response to GRB260114 (Swift/BAT trigger 1440319) at 11:40:25 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 867 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
0.080.
------- notes for trigger 1440319 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 260114d12h01m33s926848usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1440319
-expid=790084530 -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/1440319/
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 790084530.42828 or about 0000:11702:11:55:34 UT
Found 891 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 8% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 116 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 8 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 20.80 mag. Found 47 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 5% of the
Genie image region.
Genie image analysis:
Found 47591.5 counts in the large background region of 6173.0 pixels or a rate
of 7.710 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 20.07 mag. for a
4-arcsec aperture.
Found 1582.5 counts in the XRT position region of 201.0 pixels or a rate of
7.873 counts/pixel in a radius of 8.0 arcsec. The net count rate (using large
background region) at the XRT position is 0.219 +/- 0.269 (1-sigma) cps or
21.25 mag and a range from 20.38 to 99.99 mag. The 3-sigma UL at the XRT
position is 1.027 cps or 19.58 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 19.35 mag. The closest
srclist source has ra= 74.5901 dec= -8.0124 mag=17.59 sep=28.48". The closest
Genie source has ra= 74.5900 dec= -8.0123 mag=16.95 sep=29.00".
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?
790084530 866 WHITE srclist found no candidates.
790084530 866 WHITE image found no candidates.
List afterglow candidates for other finding charts.
790083789 125 WHITE srclist found no candidates.
790083789 125 WHITE image found no candidates.
790084001 337 U srclist found no candidates.
790084001 337 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -8.01442
GRB_ERROR: 8
GRB_RA: 74.59788
MAGNITUDE: 19.6
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT