srclist overlap message for exposure 3 of trigger 1245636
uvot_overlap.pl vrs. 2010-12-20b fem started at 240730d10h52m11s082039usUT
The observation of trigger 1245636 started 2024-07-30T08:07:16.6
Examining file ./1245636_g909_uvot_sky_srclist.fits
The exposure ID is 744019636
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (37.8421,59.0759) with a roll angle of 78.4
It is square with sides of 12.05 arc min. for an area of 145.15 sq arc min
The BAT error circle is centered at (37.8290,59.0740) with a radius of 3.000 arc min
This is 0.419 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 28.27 sq. arc min or 1.00 of the BAT error circle
The XRT error circle is centered at (37.8382,59.0288) with a radius of 0.043 arc min
This is 2.833 arc min from the center of the uvot region
The area of the XRT error circle is 0.006 sq. arc min
The UVOT/XRT overlap is 0.006 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 3 of trigger 1245636
find_uvot_ag.pl vrs. 2023-04-25a fem started at 240730d10h52m28s457035usUT
Observation start time is 2024-07-30T08:07:16.6
Examining file ./1245636_g909_uvot_catalog_srclist.fits
The exposure ID is 744019636
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 1245636_g909
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 1.000
srclist_overlap returned: xrt_overlap 1.000
Dimmest detected source in 1245636_g909 has mag 18.93
Aspect correction adds 0.00415 degrees (0.997 sec of time = 7.69 arc sec) to RA
Aspect correction adds 0.00039 degrees ( 1.40 arcsec) to Dec
Total aspect correction is 7.81 arcsec
Star catalogs centered at 37.8294 , 59.0709 with radius 8.77 arc min.
n_usno: 2508 n_gsc: 2709
*** WARNING -- bright star catalog has 5 entries brighter than 12 mag
The brightest has mag 10.02072
RA DEC Mag Color
bright star 0: 37.80075 (02:31:12.18) 59.07802 (+59:04:40.9) 11.71 USNO-V
bright star 1: 37.73770 (02:30:57.05) 59.07244 (+59:04:20.8) 10.58 USNO-V
bright star 2: 37.98601 (02:31:56.64) 59.08501 (+59:05:06.0) 10.02 USNO-V
bright star 3: 37.65704 (02:30:37.69) 59.12309 (+59:07:23.1) 11.15 USNO-V
bright star 4: 37.62646 (02:30:30.35) 59.11261 (+59:06:45.4) 11.81 USNO-V
Mean distance difference (CAT_DELTA) for 170 matched entries is 0.787" for 1245636_g909
Mean and std. dev of mag. difference (MAG_DELTA) are 1.425 and 0.461 for 1245636_g909
Found 21 entries without IDs and 0 entries that are acceptable afterglow candidates for 1245636_g909.
Acceptable entries have no ID, XRT distances < 6.5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
12 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=37.8290 (02:31:18.96) DEC=59.0740 (+59:04:26.4)
XRT distances are from RA=37.8382 (02:31:21.17) DEC=59.0288 (+59:01:43.5)
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 87:
ra= 37.93211 dec= 59.02073 +/- 1.1" mag=17.64+/-0.35 dist=176.4 REFID=47
Found 6 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
37.8396 59.0300 5.3 -1 USNO-B1 17.16 15.36 16.16
37.8397 59.0295 3.8 -1 USNO-B1 19.82 16.56 18.01
37.8426 59.0275 9.3 -1 USNO-B1 20.51 18.52 19.40
37.8397 59.0300 5.4 -1 GSC2.3 15.03 16.76 15.89
37.8400 59.0289 3.3 -1 GSC2.3 99.99 99.99 99.99
37.8429 59.0274 9.9 -1 GSC2.3 18.50 20.62 19.17
The closest star is 3.27" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=37.83946 (02:31:21.47) dec=59.03023 (+59:01:48.8) +/- 1.1" mag=17.96+/-0.35 dist=5.8 REFID=114
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 19.22, XRT distances < 6.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
srclist paragraph message for exposure 3 of trigger 1245636
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no 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 GRB240730 (Swift/BAT trigger 1245636) at 07:52:06 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 876 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 none of
the XRT error circle. 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 large, but
uncertain, extinction expected.
------- notes for trigger 1245636 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 240730d10h52m32s433729usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1245636
-expid=744019636 -meonly -msg_srclist
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/1245636/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for xrt position. XRT position found for srclist.
XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 744019636.5586 or about 2024:212:08:07:11 UT
Found 2632 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 23% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 21 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 24 source(s) in Genie image catalog. Found 4 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.22 mag. Found 240 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
26% of the Genie image region. The XRT position was OUTSIDE the star catalog
search region.
Genie image analysis:
Found 121628.8 counts in the large background region of 5500.0 pixels or a rate
of 22.114 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 19.49 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 18.93 mag.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 37.8395 dec= 59.0302 mag=17.96 sep=5.81".
The closest srclist source has ra= 37.8395 dec= 59.0302 mag=17.96 sep=5.81".
The closest Genie source has ra= 37.8294 dec= 59.0566 mag=16.22 sep=101.68".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 876 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 02:31:21.47 = 37.83946
DEC(J2000) = +59:01:48.8 = 59.03023
with a 90%-confidence error radius of about 1.10 arc sec. This position is 5.81
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.96 with a 1-sigma error of about 0.35. No correction has been made for the
large, but uncertain, extinction expected.
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?
744019636 876 WHITE srclist found no candidates.
744019636 876 WHITE image found no candidates.
List afterglow candidates for other finding charts.
744018893 133 WHITE srclist found no candidates.
744018893 133 WHITE image found no candidates.
744019051 291 U srclist found no candidates.
744019051 291 U image found no candidates.
------- Tokens for Quick GCN -------