srclist overlap message for exposure 3 of trigger 1104692
uvot_overlap.pl vrs. 2010-12-20b fem started at 220430d18h40m00s068946usUT
The observation of trigger 1104692 started 2022-04-30T14:08:20.3
Examining file ./1104692_g904_uvot_sky_srclist.fits
The exposure ID is 673020500
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (97.6068,9.5458) with a roll angle of 281.7
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 (97.6110,9.5100) with a radius of 3.000 arc min
This is 2.163 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 (97.6122,9.5475) with a radius of 0.033 arc min
This is 0.333 arc min from the center of the uvot region
The area of the XRT error circle is 0.003 sq. arc min
The UVOT/XRT overlap is 0.003 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 3 of trigger 1104692
find_uvot_ag.pl vrs. 2020-10-30 fem started at 220430d18h40m27s538380usUT
Observation start time is 2022-04-30T14:08:20.3
Examining file ./1104692_g904_uvot_catalog_srclist.fits
The exposure ID is 673020500
The exposure is 62.553 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 1104692_g904
*** 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 1104692_g904 has mag 19.51
Aspect correction adds -0.00120 degrees (-0.288 sec of time = -4.26 arc sec) to RA
Aspect correction adds -0.00092 degrees (-3.31 arcsec) to Dec
Total aspect correction is 5.39 arcsec
Star catalogs centered at 97.6050 , 9.5385 with radius 8.77 arc min.
n_usno: 2472 n_gsc: 0
*** WARNING -- bright star catalog has 4 entries brighter than 12 mag
The brightest has mag 10.80252
RA DEC Mag Color
bright star 0: 97.61172 (06:30:26.81) 9.57456 (+09:34:28.4) 11.95 USNO-V
bright star 1: 97.48482 (06:29:56.36) 9.52297 (+09:31:22.7) 10.80 USNO-V
bright star 2: 97.57976 (06:30:19.14) 9.66592 (+09:39:57.3) 11.46 USNO-V
bright star 3: 97.72563 (06:30:54.15) 9.46919 (+09:28:09.1) 11.89 USNO-V
Mean distance difference (CAT_DELTA) for 186 matched entries is 0.770" for 1104692_g904
Mean and std. dev of mag. difference (MAG_DELTA) are 2.879 and 0.386 for 1104692_g904
Found 7 entries without IDs and 0 entries that are acceptable afterglow candidates for 1104692_g904.
Acceptable entries have no ID, XRT distances < 5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
4 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=97.6110 (06:30:26.64) DEC= 9.5100 (+09:30:36.0)
XRT distances are from RA=97.6122 (06:30:26.92) DEC= 9.5475 (+09:32:51.1)
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 16:
ra= 97.61186 dec= 9.57515 +/- 1.1" mag=13.86+/-0.35 dist=99.5 REFID=4
Found 3 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
97.6102 9.5486 7.9 -1 USNO-B1 19.57 19.85 19.73
97.6139 9.5465 7.1 -1 USNO-B1 20.71 19.07 19.80
97.6137 9.5484 6.4 -1 USNO-B1 20.77 19.38 19.99
The closest star is 6.38" away.
List UVOT sources within 10" of the XRT position:
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 18.75, XRT distances < 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 1104692
SRCLIST PROBLEM: srclist filled telemetry buffer
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB220430 (Swift/BAT trigger 1104692) at 13:53:15 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 63 seconds with the White filter
starting 875 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 large, but uncertain, extinction expected.
------- notes for trigger 1104692 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 220430d18h40m34s340376usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1104692
-expid=673020500 -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/1104692/
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 673020500.2805 or about 2022:120:14:08:15 UT
Found 2468 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 22% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 7 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.75 mag.
Found 27 source(s) in Genie image catalog. Found 2 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 19.82 mag. Found 224 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
22% of the Genie image region.
Genie image analysis:
Found 45353.7 counts in the large background region of 5642.0 pixels or a rate
of 8.039 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 19.10 mag. for a
4-arcsec aperture.
Found 1639.6 counts in the XRT position region of 201.0 pixels or a rate of
8.157 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.147 +/- 0.698 (1-sigma) cps or
21.69 mag and a range from 19.79 to 99.99 mag. The 3-sigma UL at the XRT
position is 2.240 cps or 18.73 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 19.51 mag. The closest
srclist source has ra= 97.6149 dec= 9.5518 mag=17.57 sep=18.26". The closest
Genie source has ra= 97.6149 dec= 9.5517 mag=15.93 sep=17.89".
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?
673020500 874 WHITE srclist found no candidates.
673020500 874 WHITE image found no candidates.
List afterglow candidates for other finding charts.
673019685 59 WHITE srclist found no candidates.
673019685 59 WHITE image found no candidates.
673019897 271 U srclist found no candidates.
673019897 271 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 9.54753
GRB_ERROR: 5
GRB_RA: 97.61217
IMAGE_START_TIME: 14:08:15
MAGNITUDE: 18.7
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT