image overlap message for exposure 2 of trigger 1262165
uvot_overlap.pl vrs. 2010-12-20b fem started at 241025d09h24m55s266562usUT
The observation of trigger 1262165 started 2024-10-25T01:43:04.1
Examining file ./1262165_g373_uvot_sky_image.fits
The exposure ID is 751513384
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (333.6037,83.5775) with a roll angle of 302.0
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 (333.3300,83.5660) with a radius of 3.000 arc min
This is 1.963 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 6.10 sq. arc min or 0.22 of the BAT error circle
The XRT error circle is centered at (333.6577,83.5759) with a radius of 0.037 arc min
This is 0.376 arc min from the center of the uvot region
The area of the XRT error circle is 0.004 sq. arc min
The UVOT/XRT overlap is 0.004 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1262165
find_uvot_ag.pl vrs. 2023-04-25a fem started at 241025d09h25m27s126828usUT
Observation start time is 2024-10-25T01:43:04.1
Examining file ./1262165_g373_uvot_catalog_image.fits
The exposure ID is 751513384
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 1 detected source(s) for 1262165_g373
Aspect correction adds -0.00286 degrees (-0.687 sec of time = -1.16 arc sec) to RA
Aspect correction adds 0.00128 degrees ( 4.60 arcsec) to Dec
Total aspect correction is 4.74 arcsec
Star catalogs centered at 333.6042 , 83.5719 with radius 2.00 arc min.
n_usno: 59 n_gsc: 35
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 1 matched entries is 0.451" for 1262165_g373
Mean and std. dev of mag. difference (MAG_DELTA) are 1.388 and 0.000 for 1262165_g373
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1262165_g373.
Acceptable entries have no ID, XRT distances < 5.5", 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=333.3300 (22:13:19.20) DEC=83.5660 (+83:33:57.6)
XRT distances are from RA=333.6577 (22:14:37.85) DEC=83.5759 (+83:34:33.2)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 9546.3867 counts in the bkg source region of 6201.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 1.539 counts/pixel (5-sig UL in 4" is 20.23 mag) for 1262165_g373
There are 303.04053 counts in the xrt source region of 205.00000 pixels.
Rate in xrt region with 8 arcsec radius is 1.478 counts/pixel for 1262165_g373
There are 1937.0653 counts in the xrt_bkg source region of 1251.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 1.548 counts/pixel (5-sig UL in 4" is 20.23 mag) for 1262165_g373
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 20.79, XRT distances < 5.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1262165_751513384_241025d09h25m27s126828usUT_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(333.6037,83.5775,45")
fk5;-circle(333.573727398189,83.5678232071428,6")
Region file: 1262165_751513384_241025d09h25m27s126828usUT_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(333.65771,83.57589,8")
Region file: 1262165_751513384_241025d09h25m27s126828usUT_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(333.65771,83.57589,25")
fk5;-circle(333.65771,83.57589,15")
image paragraph message for exposure 2 of trigger 1262165
------ Start for Possible Stand-alone Circular ----
In response to GRB241025 (Swift/BAT trigger 1262165) at 01:36:50 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
339 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
0.250.
------- notes for trigger 1262165 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 241025d09h25m32s474398usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1262165
-expid=751513384 -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/1262165/
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 751513384.0612 or about 2024:299:01:42:59 UT
Found 478 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 9% of the srclist region. Found 27 sources in
srclist catalog. Found 2 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 1 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 20.79 mag. Found 55 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 9% of the
Genie image region.
Genie image analysis:
Found 9546.4 counts in the large background region of 6201.0 pixels or a rate
of 1.539 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 20.03 mag. for a
4-arcsec aperture.
Found 303.0 counts in the XRT position region of 205.0 pixels or a rate of
1.478 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.058 +/- 0.075 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.226 cps or 19.76 mag. The closest srclist
source has ra= 333.5742 dec= 83.5678 mag=19.16 sep=44.48". The closest Genie
source has ra= 333.5737 dec= 83.5678 mag=18.61 sep=44.62".
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?
751513384 339 U srclist found no candidates.
751513384 339 U image found no candidates.
List afterglow candidates for other finding charts.
751513170 125 WHITE 333.65326 83.57560 17.86/19.2 2.1 srclist Yes
751513170 125 WHITE 333.65379 83.57565 17.56/20.9 1.8 image Yes
751513919 874 WHITE srclist found no candidates.
751513919 874 WHITE 333.65472 83.57572 21.06/20.9 0.7 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 83.57589
GRB_ERROR: 5.5
GRB_RA: 333.65771
IMAGE_START_TIME: 01:42:59
MAGNITUDE: 19.8
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT