image overlap message for exposure 1 of trigger 1321323
uvot_overlap.pl vrs. 2010-12-20b fem started at 250606d08h45m49s022040usUT
The observation of trigger 1321323 started 2025-06-05T18:54:54.0
Examining file ./1321323_g141_uvot_sky_image.fits
The exposure ID is 770842493
The exposure time is 143.652 (seconds)
The filter is WHITE.
The uvot region is centered at (166.9505,-19.7868) with a roll angle of 290.6
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 (166.9770,-19.7950) with a radius of 3.000 arc min
This is 1.575 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 6.96 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (166.9572,-19.7884) with a radius of 0.033 arc min
This is 0.389 arc min from the center of the uvot region
The area of the XRT error circle is 0.003 sq. arc min
The UVOT/XRT overlap is 0.003 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1321323
find_uvot_ag.pl vrs. 2023-04-25a fem started at 250606d08h45m52s621499usUT
Observation start time is 2025-06-05T18:54:54.0
Examining file ./1321323_g141_uvot_catalog_image.fits
The exposure ID is 770842493
The exposure is 143.652 sec.
The bin size is 2 pixels
The filter is WHITE
There are 8 detected source(s) for 1321323_g141
Aspect correction adds -0.00096 degrees (-0.230 sec of time = -3.24 arc sec) to RA
Aspect correction adds 0.00015 degrees ( 0.56 arcsec) to Dec
Total aspect correction is 3.29 arcsec
Star catalogs centered at 166.9505 , -19.7902 with radius 2.55 arc min.
n_usno: 68 n_gsc: 70
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.7715
RA DEC Mag Color
bright star 0: 166.94716 (11:07:47.32) -19.81990 (-19:49:11.6) 11.77 GSC-F
Mean distance difference (CAT_DELTA) for 7 matched entries is 0.389" for 1321323_g141
Mean and std. dev of mag. difference (MAG_DELTA) are 1.236 and 0.311 for 1321323_g141
Found 1 entries without IDs and 0 entries that are acceptable afterglow candidates for 1321323_g141.
Acceptable entries have no ID, XRT distances < 5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
1 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=166.9770 (11:07:54.48) DEC=-19.7950 (-19:47:42.0)
XRT distances are from RA=166.9572 (11:07:49.72) DEC=-19.7884 (-19:47:18.3)
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 7:
ra=166.94746 dec=-19.81578 +/- 0.6" mag=18.23+/-0.15 dist=103.9 REFID=1 flag=16
Found 2 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
166.9551 -19.7872 8.3 -1 USNO-B1 20.30 19.52 19.87
166.9548 -19.7870 9.4 -1 GSC2.3 19.66 21.49 99.99
The closest star is 8.32" away.
List UVOT sources within 10" of the XRT position:
There are 59480.434 counts in the bkg source region of 6082.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 9.780 counts/pixel (5-sig UL in 4" is 20.07 mag) for 1321323_g141
There are 1883.3999 counts in the xrt source region of 197.00000 pixels.
Rate in xrt region with 8 arcsec radius is 9.560 counts/pixel for 1321323_g141
There are 12113.482 counts in the xrt_bkg source region of 1242.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 9.753 counts/pixel (5-sig UL in 4" is 20.07 mag) for 1321323_g141
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 20.62, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1321323_770842493_250606d08h45m52s621499usUT_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(166.9505,-19.7868,45")
fk5;-circle(166.95161640989,-19.7967258138,6")
fk5;-circle(166.946617915306,-19.7766881396526,6")
Region file: 1321323_770842493_250606d08h45m52s621499usUT_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(166.95717,-19.78842,8")
Region file: 1321323_770842493_250606d08h45m52s621499usUT_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(166.95717,-19.78842,25")
fk5;-circle(166.95717,-19.78842,15")
image paragraph message for exposure 1 of trigger 1321323
------ Start for Possible Stand-alone Circular ----
In response to GRB250605 (Swift/BAT trigger 1321323) at 18:52:31 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 144 seconds with the White filter
starting 106 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
0.039.
------- notes for trigger 1321323 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 250606d08h45m57s989313usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1321323
-expid=770842493 -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/1321323/
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 770842493.99654 or about 2025:157:18:54:48 UT
Found 400 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 36 sources in
srclist catalog. Found 1 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.20 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 20.62 mag. Found 69 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 7% of the
Genie image region.
Genie image analysis:
Found 59480.4 counts in the large background region of 6082.0 pixels or a rate
of 9.780 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 19.89 mag. for a
4-arcsec aperture.
Found 1883.4 counts in the XRT position region of 197.0 pixels or a rate of
9.560 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.264 +/- 0.325 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.975 cps or 19.63 mag. The closest srclist
source has ra= 166.9666 dec= -19.7891 mag=18.49 sep=31.90". The closest Genie
source has ra= 166.9664 dec= -19.7889 mag=18.31 sep=31.45".
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?
770842493 106 WHITE srclist found no candidates.
770842493 106 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -19.78842
GRB_ERROR: 5
GRB_RA: 166.95717
IMAGE_START_TIME: 18:54:48
MAGNITUDE: 19.6
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT