image overlap message for exposure 3 of trigger 1262764
uvot_overlap.pl vrs. 2010-12-20b fem started at 241027d07h25m48s513771usUT
The observation of trigger 1262764 started 2024-10-26T22:57:31.3
Examining file ./1262764_g898_uvot_sky_image.fits
The exposure ID is 751676251
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (293.4111,57.9773) 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 0.410 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 0.623 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 3 of trigger 1262764
find_uvot_ag.pl vrs. 2023-04-25a fem started at 241027d07h26m23s618797usUT
Observation start time is 2024-10-26T22:57:31.3
Examining file ./1262764_g898_uvot_catalog_image.fits
The exposure ID is 751676251
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 25 detected source(s) for 1262764_g898
Aspect correction adds -0.00203 degrees (-0.487 sec of time = -3.87 arc sec) to RA
Aspect correction adds 0.00003 degrees ( 0.10 arcsec) to Dec
Total aspect correction is 3.87 arcsec
Star catalogs centered at 293.4169 , 57.9794 with radius 2.80 arc min.
n_usno: 229 n_gsc: 315
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 24 matched entries is 0.420" for 1262764_g898
Mean and std. dev of mag. difference (MAG_DELTA) are 0.629 and 0.311 for 1262764_g898
Found 3 entries without IDs and 3 entries that are acceptable afterglow candidates for 1262764_g898.
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)
-----------------
Entry 24 in the list of sources is a candidate afterglow for 1262764_g898 with genie
ra=293.38165 (19:33:31.60) dec=57.99835 (+57:59:54.0) +/- 0.7" mag=20.07+/-0.18
dist=57.0 REFID=3 major=1.8 minor=1.2 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 104.4 arc sec from the BAT position.
This source is near the edge of image (0.919)
Found 5 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
293.3757 58.0018 17.0 -1 USNO-B1 12.61 11.89 12.21 *
293.3793 57.9947 13.9 -1 GSC2.3 20.24 21.29 99.99
293.3829 58.0021 13.7 -1 GSC2.3 99.99 22.21 99.99
293.3755 58.0017 16.8 -1 GSC2.3 12.58 12.81 99.99
293.3757 58.0018 17.0 -1 GSC2.3 99.99 99.99 12.27
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" or brighter than 12 mag
-----------------
Entry 25 in the list of sources is a candidate afterglow for 1262764_g898 with genie
ra=293.38332 (19:33:32.00) dec=58.00245 (+58:00:08.8) +/- 0.6" mag=18.87+/-0.15
dist=67.4 REFID=2 major=1.7 minor=1.2 flag=16 (aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 112.1 arc sec from the BAT position.
This source is near the edge of image (0.927)
Found 10 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
293.3757 58.0018 14.8 -1 USNO-B1 12.61 11.89 12.21 *
293.3805 58.0061 14.4 -1 USNO-B1 20.21 18.52 19.27
293.3755 58.0058 19.2 -1 USNO-B1 16.45 15.05 15.67
293.3829 58.0021 1.5 -1 GSC2.3 99.99 22.21 99.99 *
293.3755 58.0017 15.1 -1 GSC2.3 12.58 12.81 99.99
293.3757 58.0018 14.8 -1 GSC2.3 99.99 99.99 12.27
293.3806 58.0060 13.7 -1 GSC2.3 17.86 19.95 99.99
293.3807 58.0061 14.0 -1 GSC2.3 18.01 20.08 18.56
293.3757 58.0057 18.6 -1 GSC2.3 14.62 15.81 99.99
293.3757 58.0058 18.9 -1 GSC2.3 14.90 15.91 15.23
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" or brighter than 12 mag
-----------------
Entry 26 in the list of sources is a candidate afterglow for 1262764_g898 with genie
ra=293.37384 (19:33:29.72) dec=57.95997 (+57:57:35.9) +/- 0.7" mag=19.82+/-0.17
dist=107.1 REFID=25 major=2.1 minor=0.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 119.9 arc sec from the BAT position.
This source is near the edge of image (0.980)
Found 6 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
293.3726 57.9568 11.6 -1 USNO-B1 20.36 18.43 19.29
293.3730 57.9555 16.3 -1 USNO-B1 14.09 12.44 13.17
293.3748 57.9598 1.9 -1 GSC2.3 99.99 21.43 99.99 *
293.3722 57.9575 9.6 -1 GSC2.3 99.99 99.99 99.99
293.3730 57.9554 16.7 -1 GSC2.3 12.35 13.53 12.73
293.3730 57.9553 16.9 -1 GSC2.3 12.22 13.33 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 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
293.4042 57.9858 7.0 -1 GSC2.3 19.26 21.41 99.99
293.4041 57.9857 6.9 -1 GSC2.3 19.63 99.99 99.99
The closest star is 6.00" away.
List UVOT sources within 10" of the XRT position:
There are 35672.074 counts in the bkg source region of 5290.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 6.743 counts/pixel (5-sig UL in 4" is 20.31 mag) for 1262764_g898
There are 1225.4395 counts in the xrt source region of 194.00000 pixels.
Rate in xrt region with 8 arcsec radius is 6.317 counts/pixel for 1262764_g898
There are 6195.9897 counts in the xrt_bkg source region of 974.00000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 6.361 counts/pixel (5-sig UL in 4" is 20.35 mag) for 1262764_g898
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 20.87, 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_751676251_241027d07h26m23s618797usUT_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(293.4111,57.9773,45")
fk5;-circle(293.422862208201,57.9781829110549,6")
fk5;-circle(293.415629534369,57.9803837775044,6")
fk5;-circle(293.416444459072,57.9826503270753,6")
fk5;-circle(293.433008252127,57.9773610210168,6")
fk5;-circle(293.410776688289,57.9843860636526,6")
fk5;-circle(293.407331011156,57.9753505629259,6")
fk5;-circle(293.423782452273,57.9664870221772,6")
fk5;-circle(293.401071301581,57.9733916809101,6")
fk5;-circle(293.419708159361,57.9642827251713,6")
fk5;-circle(293.395514035498,57.9744759326194,6")
fk5;-circle(293.393286693515,57.9827617224598,6")
fk5;-circle(293.388644618751,57.9845028278039,6")
Region file: 1262764_751676251_241027d07h26m23s618797usUT_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_751676251_241027d07h26m23s618797usUT_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(293.410776688289,57.9843860636526,6")
fk5;-circle(293.393286693515,57.9827617224598,6")
fk5;-circle(293.388644618751,57.9845028278039,6")
fk5;-circle(293.385705882925,57.9884362340182,6")
image paragraph message for exposure 3 of trigger 1262764
SRCLIST PROBLEM: srclist filled telemetry buffer
------ 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 864 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 241027d07h26m30s341947usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1262764
-expid=751676251 -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 751676251.26386 or about 2024:300:22:57:26 UT
Found 2846 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 26% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 22 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 25 source(s) in Genie image catalog. Found 3 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.87 mag. Found 315 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 35672.1 counts in the large background region of 5290.0 pixels or a rate
of 6.743 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 20.14 mag. for a
4-arcsec aperture.
Found 1225.4 counts in the XRT position region of 194.0 pixels or a rate of
6.316 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.058 +/- 0.256 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.767 cps or 19.89 mag. The number of srclist
sources filled the available telemetry. The weakest source detected was 19.15
mag. The closest srclist source has ra= 293.3888 dec= 57.9844 mag=17.18
sep=23.24". The closest Genie source has ra= 293.3933 dec= 57.9828 mag=18.85
sep=18.41".
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?
751676251 864 WHITE srclist found no candidates.
751676251 864 WHITE image found no candidates.
List afterglow candidates for other finding charts.
751675504 117 WHITE srclist found no candidates.
751675504 117 WHITE image found no candidates.
751675717 330 U srclist found no candidates.
751675717 330 U 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: 22:57:26
MAGNITUDE: 19.9
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT