image overlap message for exposure 1 of trigger 1262764
uvot_overlap.pl vrs. 2010-12-20b fem started at 241027d07h25m46s990453usUT
The observation of trigger 1262764 started 2024-10-26T22:45:04.2
Examining file ./1262764_g151_uvot_sky_image.fits
The exposure ID is 751675504
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (293.4127,57.9785) with a roll angle of 256.2
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 (293.4230,57.9800) with a radius of 3.000 arc min
This is 0.339 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 (293.4006,57.9861) with a radius of 0.037 arc min
This is 0.596 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 1 of trigger 1262764
find_uvot_ag.pl vrs. 2023-04-25a fem started at 241027d07h25m51s721522usUT
Observation start time is 2024-10-26T22:45:04.2
Examining file ./1262764_g151_uvot_catalog_image.fits
The exposure ID is 751675504
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 19 detected source(s) for 1262764_g151
Aspect correction adds -0.00150 degrees (-0.361 sec of time = -2.87 arc sec) to RA
Aspect correction adds 0.00058 degrees ( 2.08 arcsec) to Dec
Total aspect correction is 3.54 arcsec
Star catalogs centered at 293.4189 , 57.9724 with radius 2.54 arc min.
n_usno: 187 n_gsc: 253
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 21 matched entries is 0.402" for 1262764_g151
Mean and std. dev of mag. difference (MAG_DELTA) are 0.686 and 0.387 for 1262764_g151
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1262764_g151.
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=293.4230 (19:33:41.52) DEC=57.9800 (+57:58:48.0)
XRT distances are from RA=293.4006 (19:33:36.14) DEC=57.9861 (+57:59:10.0)
Found 4 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
293.4040 57.9858 6.6 -1 USNO-B1 21.54 19.97 20.67
293.4037 57.9858 6.0 -1 USNO-B1 21.08 99.99 99.99
293.4041 57.9857 6.9 -1 GSC2.3 19.63 99.99 99.99
293.4042 57.9858 7.0 -1 GSC2.3 19.26 21.41 99.99
The closest star is 6.00" away.
List UVOT sources within 10" of the XRT position:
There are 1.0218671E+05 counts in the bkg source region of 5527.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 18.489 counts/pixel (5-sig UL in 4" is 19.77 mag) for 1262764_g151
There are 3687.2332 counts in the xrt source region of 198.00000 pixels.
Rate in xrt region with 8 arcsec radius is 18.622 counts/pixel for 1262764_g151
There are 17853.762 counts in the xrt_bkg source region of 978.00000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 18.255 counts/pixel (5-sig UL in 4" is 19.77 mag) for 1262764_g151
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 20.32, 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: 1262764_751675504_241027d07h25m51s721522usUT_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(293.4127,57.9785,45")
fk5;-circle(293.422803126891,57.9781577705074,6")
fk5;-circle(293.415601350171,57.9803987709032,6")
fk5;-circle(293.416543961489,57.9826344677571,6")
fk5;-circle(293.432984574572,57.9773026909542,6")
fk5;-circle(293.41087198042,57.9843416953453,6")
fk5;-circle(293.423765478006,57.966461394357,6")
fk5;-circle(293.401164864227,57.9734383949583,6")
fk5;-circle(293.393400245557,57.9827798522996,6")
fk5;-circle(293.388577710899,57.9844917573882,6")
Region file: 1262764_751675504_241027d07h25m51s721522usUT_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(293.40058,57.98611,8")
Region file: 1262764_751675504_241027d07h25m51s721522usUT_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(293.40058,57.98611,25")
fk5;-circle(293.40058,57.98611,15")
fk5;-circle(293.41087198042,57.9843416953453,6")
fk5;-circle(293.393400245557,57.9827798522996,6")
fk5;-circle(293.388577710899,57.9844917573882,6")
fk5;-circle(293.385673900619,57.9884390142368,6")
image paragraph message for exposure 1 of trigger 1262764
------ Start for Possible Stand-alone Circular ----
In response to GRB241026 (Swift/BAT trigger 1262764) at 22:42:32 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 117 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
0.073.
------- notes for trigger 1262764 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 241027d07h25m59s814215usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1262764
-expid=751675504 -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/1262764/
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 751675504.22486 or about 2024:300:22:44:59 UT
Found 1543 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 25% of the srclist region. Found 153 sources in
srclist catalog. Found 46 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 19 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 20.32 mag. Found 253 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
27% of the Genie image region.
Genie image analysis:
Found 102186.7 counts in the large background region of 5527.0 pixels or a rate
of 18.489 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 19.59 mag. for a
4-arcsec aperture.
Found 3687.2 counts in the XRT position region of 198.0 pixels or a rate of
18.622 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.484 +/- 0.443 (1-sigma) cps or
20.39 mag and a range from 19.69 to 23.07 mag. The 3-sigma UL at the XRT
position is 1.814 cps or 18.96 mag. The closest srclist source has ra= 293.4105
dec= 57.9843 mag=18.96 sep=20.06". The closest Genie source has ra= 293.3934
dec= 57.9828 mag=19.21 sep=18.21".
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?
751675504 117 WHITE srclist found no candidates.
751675504 117 WHITE image found no candidates.
List afterglow candidates for other finding charts.
751675717 330 U srclist found no candidates.
751675717 330 U image found no candidates.
751676251 864 WHITE srclist found no candidates.
751676251 864 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 57.98611
GRB_ERROR: 5.5
GRB_RA: 293.40058
IMAGE_START_TIME: 22:44:59
MAGNITUDE: 19.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT