image overlap message for exposure 2 of trigger 1232465
uvot_overlap.pl vrs. 2010-12-20b fem started at 250909d22h59m43s202372usUT
The observation of trigger 1232465 started 2024-06-01T21:36:09.8
Examining file 1232465_g348_uvot_sky_image.fits
The exposure ID is 738970569
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (108.7251,-6.2023) with a roll angle of 308.3
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 (108.7310,-6.2060) with a radius of 3.000 arc min
This is 0.418 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
Could not find the location of an XRT error circle
image afterglow message for exposure 2 of trigger 1232465
find_uvot_ag.pl vrs. 2023-04-25a fem started at 250909d22h59m44s030709usUT
Observation start time is 2024-06-01T21:36:09.8
Examining file 1232465_g348_uvot_catalog_image.fits
The exposure ID is 738970569
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 29 detected source(s) for 1232465_g348
Aspect correction adds -0.00052 degrees (-0.125 sec of time = -1.86 arc sec) to RA
Aspect correction adds 0.00155 degrees ( 5.59 arcsec) to Dec
Total aspect correction is 5.89 arcsec
Star catalogs centered at 108.7246 , -6.2018 with radius 2.69 arc min.
n_usno: 369 n_gsc: 344
Bright star catalog has no entries brighter than 12 mag
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 29 matched entries is 0.524" for 1232465_g348
Mean and std. dev of mag. difference (MAG_DELTA) are 1.269 and 0.578 for 1232465_g348
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1232465_g348.
Acceptable entries have no ID, BAT distance < 200" or XRT distance < 10", 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=108.7310 (07:14:55.44) DEC=-6.2060 (-06:12:21.6)
XRT distances are as reported in catalog file.
-----------------
Entry 28 in the list of sources is a candidate afterglow for 1232465_g348 with genie
ra=108.70019 (07:14:48.05) dec=-6.18938 (-06:11:21.8) +/- 0.6" mag=17.38+/-0.15
dist=125.5 REFID=8 major=0.7 minor=0.4 flag=0
This source is near the edge of image (0.952)
Found 16 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
108.7001 -6.1930 13.2 -1 USNO-B1 99.99 17.57 99.99
108.6999 -6.1929 12.8 -1 USNO-B1 99.99 18.72 99.99
108.7000 -6.1924 10.9 -1 USNO-B1 19.48 17.74 18.52
108.7015 -6.1891 4.8 -1 USNO-B1 19.29 18.58 18.90 *
108.6999 -6.1888 2.3 -1 USNO-B1 15.50 14.13 14.74 *
108.6996 -6.1888 2.9 -1 USNO-B1 99.99 14.54 99.99 *
108.6981 -6.1918 11.4 -1 USNO-B1 17.14 16.09 16.56
108.6989 -6.1884 6.0 -1 USNO-B1 18.49 99.99 99.99
108.6992 -6.1840 19.7 -1 USNO-B1 19.65 18.65 19.09
108.7000 -6.1938 15.7 -1 GSC2.3 20.38 99.99 99.99
108.7001 -6.1923 10.4 -1 GSC2.3 18.01 19.59 99.99
108.7024 -6.1860 14.5 -1 GSC2.3 20.82 99.99 99.99
108.7000 -6.1888 2.4 -1 GSC2.3 14.07 15.11 99.99 *
108.7024 -6.1850 17.8 -1 GSC2.3 20.91 99.99 99.99
108.6982 -6.1918 11.2 -1 GSC2.3 16.15 17.30 99.99
108.6953 -6.1868 19.7 -1 GSC2.3 20.90 99.99 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
There are 29943.742 counts in the bkg source region of 5549.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 5.396 counts/pixel (5-sig UL in 4" is 19.55 mag) for 1232465_g348
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.54, BAT distances < 200",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1232465_738970569_250909d22h59m44s030709usUT_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(108.7251,-6.2023,45")
fk5;-circle(108.72857518482,-6.20338967913465,6")
fk5;-circle(108.730992854225,-6.20218323496412,6")
fk5;-circle(108.725653706335,-6.20542654307094,6")
fk5;-circle(108.725061983662,-6.20845924264709,6")
fk5;-circle(108.722709989504,-6.19353187775551,6")
fk5;-circle(108.719680278735,-6.19424981269816,6")
fk5;-circle(108.713790498011,-6.20572966612864,6")
fk5;-circle(108.721231079345,-6.18926740727514,6")
fk5;-circle(108.713392239324,-6.1953836647753,6")
image paragraph message for exposure 2 of trigger 1232465
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: partial overlap
SRCLIST PROBLEM: srclist filled telemetry buffer
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB240601 (Swift/BAT trigger 1232465) at 21:30:20 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
316 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 25% of the
BAT 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 BAT
error circle. The limiting magnitude for the list of sources is expected to be
about 17.5. No correction has been made for the large, but uncertain,
extinction expected.
------- notes for trigger 1232465 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 250909d22h59m45s385036usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1232465
-expid=738970569 -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/1232465/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for bat position. No XRT position found for
srclist. No XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 738970569.76406 or about 2024:153:21:36:04 UT
Found 3969 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 31% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 11 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 17.56 mag.
Found 29 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 19.54 mag. Found 365 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
35% of the Genie image region.
Genie image analysis:
Found 29943.7 counts in the large background region of 5549.0 pixels or a rate
of 5.396 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 19.36 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 17.65 mag.
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?
738970569 315 U srclist found no candidates.
738970569 315 U image found no candidates.
List afterglow candidates for other finding charts.
738970358 104 WHITE srclist found no candidates.
738970358 104 WHITE image found no candidates.
738971122 868 WHITE srclist found no candidates.
738971122 868 WHITE image found no candidates.
------- Tokens for Quick GCN -------