srclist overlap message for exposure 1 of trigger 1110821
uvot_overlap.pl vrs. 2010-12-20b fem started at 220618d13h18m13s793592usUT
The observation of trigger 1110821 started 2022-06-18T09:13:30.6
Examining file ./1110821_g180_uvot_sky_srclist.fits
The exposure ID is 677236410
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (38.9781,55.2094) with a roll angle of 112.3
It is square with sides of 8.03 arc min. for an area of 64.51 sq arc min
The BAT error circle is centered at (38.9660,55.2140) with a radius of 3.000 arc min
This is 0.500 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 (38.9860,55.2157) with a radius of 0.037 arc min
This is 0.465 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
srclist afterglow message for exposure 1 of trigger 1110821
find_uvot_ag.pl vrs. 2020-10-30 fem started at 220618d13h18m16s255098usUT
Observation start time is 2022-06-18T09:13:30.6
Examining file ./1110821_g180_uvot_catalog_srclist.fits
The exposure ID is 677236410
The exposure is 149.846 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 1110821_g180
*** 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 1110821_g180 has mag 18.88
Aspect correction adds 0.00156 degrees (0.374 sec of time = 3.20 arc sec) to RA
Aspect correction adds -0.00038 degrees (-1.35 arcsec) to Dec
Total aspect correction is 3.48 arcsec
Star catalogs centered at 38.9805 , 55.2118 with radius 6.11 arc min.
n_usno: 1476 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.73414
RA DEC Mag Color
bright star 0: 38.88636 (02:35:32.73) 55.17050 (+55:10:13.8) 11.73 USNO-V
Mean distance difference (CAT_DELTA) for 185 matched entries is 0.777" for 1110821_g180
Mean and std. dev of mag. difference (MAG_DELTA) are 1.086 and 0.423 for 1110821_g180
Found 11 entries without IDs and 6 entries that are acceptable afterglow candidates for 1110821_g180.
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.
1 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=38.9660 (02:35:51.84) DEC=55.2140 (+55:12:50.4)
XRT distances are from RA=38.9860 (02:35:56.65) DEC=55.2157 (+55:12:56.4)
-----------------
Entry 7 in the list of sources is a candidate afterglow for 1110821_g180 with 1x1 stamp
ra=39.00024 (02:36:00.06) dec=55.20743 (+55:12:26.8) +/- 1.1" mag=18.48+/-0.35
dist=41.6 REFID=111
*** The position of this source is inconsistent with the XRT position.
The position is 74.2 arc sec from the BAT position.
src: 7 distr. of nearby unmatched sources: 0 0 0 0 0
Found 8 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
38.9980 55.2068 5.1 -1 USNO-B1 18.17 17.77 17.95
39.0013 55.2073 2.3 -1 USNO-B1 17.03 15.58 16.22 *
39.0016 55.2071 3.1 -1 USNO-B1 16.91 17.44 17.20 *
39.0019 55.2074 3.3 -1 USNO-B1 18.06 16.17 17.01 *
39.0047 55.2111 16.0 -1 USNO-B1 20.50 18.45 19.36
39.0031 55.2064 7.0 -1 USNO-B1 19.61 17.64 18.52
39.0059 55.2064 12.2 -1 USNO-B1 18.17 17.01 17.52
39.0078 55.2065 15.9 -1 USNO-B1 99.99 18.85 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 42 in the list of sources is a candidate afterglow for 1110821_g180 with 1x1 stamp
ra=38.93680 (02:35:44.83) dec=55.23964 (+55:14:22.7) +/- 1.1" mag=18.88+/-0.35
dist=132.9 REFID=189
*** The position of this source is inconsistent with the XRT position.
The position is 110.1 arc sec from the BAT position.
src: 42 distr. of nearby unmatched sources: 0 1 0 2 0
Found 9 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
38.9373 55.2355 15.0 -1 USNO-B1 19.82 18.31 18.98
38.9382 55.2393 3.2 -1 USNO-B1 17.57 16.05 16.72 *
38.9391 55.2400 4.8 -1 USNO-B1 16.02 14.49 15.17
38.9397 55.2404 6.5 -1 USNO-B1 16.66 15.13 15.81
38.9362 55.2425 10.4 -1 USNO-B1 16.48 14.98 15.64
38.9279 55.2386 18.6 -1 USNO-B1 20.30 18.55 19.32
38.9338 55.2435 15.2 -1 USNO-B1 14.13 13.04 13.52
38.9332 55.2442 17.9 -1 USNO-B1 99.99 13.57 99.99
38.9326 55.2439 17.6 -1 USNO-B1 15.05 13.64 14.27
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 65 in the list of sources is a candidate afterglow for 1110821_g180 with 1x1 stamp
ra=38.96106 (02:35:50.66) dec=55.25974 (+55:15:35.1) +/- 1.1" mag=18.20+/-0.35
dist=166.7 REFID=177
*** The position of this source is inconsistent with the XRT position.
The position is 165.0 arc sec from the BAT position.
src: 65 distr. of nearby unmatched sources: 1 1 0 0 0
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
38.9608 55.2556 15.0 -1 USNO-B1 18.31 17.05 17.61
38.9655 55.2566 14.6 -1 USNO-B1 19.84 18.55 19.12
38.9581 55.2587 7.3 -1 USNO-B1 19.14 17.69 18.34
38.9603 55.2603 2.5 -1 USNO-B1 15.57 14.02 14.71 *
38.9607 55.2615 6.5 -1 USNO-B1 17.06 15.62 16.26
38.9586 55.2612 7.4 -1 USNO-B1 20.55 18.29 19.29
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 66 in the list of sources is a candidate afterglow for 1110821_g180 with 3x3 stamp
ra=38.95965 (02:35:50.32) dec=55.25979 (+55:15:35.2) +/- 1.1" mag=17.69+/-0.35
dist=167.8 REFID=97
*** The position of this source is inconsistent with the XRT position.
The position is 165.4 arc sec from the BAT position.
src: 66 distr. of nearby unmatched sources: 1 1 0 0 0
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
38.9608 55.2556 15.4 -1 USNO-B1 18.31 17.05 17.61
38.9655 55.2566 16.7 -1 USNO-B1 19.84 18.55 19.12
38.9581 55.2587 5.2 -1 USNO-B1 19.14 17.69 18.34
38.9603 55.2603 2.3 -1 USNO-B1 15.57 14.02 14.71 *
38.9607 55.2615 6.6 -1 USNO-B1 17.06 15.62 16.26
38.9586 55.2612 5.6 -1 USNO-B1 20.55 18.29 19.29
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 74 in the list of sources is a candidate afterglow for 1110821_g180 with 1x1 stamp
ra=38.96103 (02:35:50.65) dec=55.26217 (+55:15:43.8) +/- 1.1" mag=18.35+/-0.35
dist=175.1 REFID=118
*** The position of this source is inconsistent with the XRT position.
The position is 173.7 arc sec from the BAT position.
src: 74 distr. of nearby unmatched sources: 0 2 0 0 0
Found 5 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
38.9581 55.2587 14.0 -1 USNO-B1 19.14 17.69 18.34
38.9603 55.2603 6.9 -1 USNO-B1 15.57 14.02 14.71
38.9607 55.2615 2.4 -1 USNO-B1 17.06 15.62 16.26 *
38.9586 55.2612 6.0 -1 USNO-B1 20.55 18.29 19.29
38.9624 55.2657 13.1 -1 USNO-B1 20.15 18.69 19.34
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 104 in the list of sources is a candidate afterglow for 1110821_g180 with 3x3 stamp
ra=38.95024 (02:35:48.06) dec=55.16295 (+55:09:46.6) +/- 1.1" mag=15.87+/-0.35
dist=203.6 REFID=12
*** The position of this source is inconsistent with the XRT position.
The position is 186.6 arc sec from the BAT position.
src: 104 srclist_match has ID
src: 104 distr. of nearby unmatched sources: 2 0 0 0 0
Found 5 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
38.9489 55.1672 15.7 -1 USNO-B1 20.17 18.67 19.34
38.9554 55.1647 12.5 -1 USNO-B1 19.40 18.09 18.67
38.9470 55.1641 7.8 -1 USNO-B1 17.63 15.87 16.65
38.9484 55.1636 4.4 -1 USNO-B1 15.05 99.99 99.99
38.9495 55.1632 1.6 -1 USNO-B1 15.61 13.38 14.37 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 1 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
38.9885 55.2171 7.2 -1 USNO-B1 18.98 17.33 18.06
The closest star is 7.20" 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 19.22, XRT distances < 5.5",
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 1 of trigger 1110821
SRCLIST PROBLEM: srclist filled telemetry buffer
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
1 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB220618 (Swift/BAT trigger 1110821) at 09:10:29 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 151 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 1110821 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 220618d13h18m22s370907usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1110821
-expid=677236410 -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/1110821/
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 677236410.58616 or about 2022:169:09:13:25 UT
Found 1472 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 27% 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 19.22 mag.
Found 23 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. 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
20.12 mag. Found 271 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 28% of the Genie image region. The
Genie image is INCOMPLETE with 7399 null pixels.
Genie image analysis:
Found 133994.2 counts in the large background region of 5011.0 pixels or a rate
of 26.740 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 19.39 mag. for a
4-arcsec aperture.
Found 5755.0 counts in the XRT position region of 201.0 pixels or a rate of
28.632 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 2.614 +/- 0.546 (1-sigma) cps or
18.56 mag and a range from 18.36 to 18.82 mag. The 3-sigma UL at the XRT
position is 4.251 cps or 18.03 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.88 mag. The closest
srclist source has ra= 38.9945 dec= 55.2199 mag=15.13 sep=23.19".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 38.9886 dec= 55.2171 mag=19.10 sep=7.36". The closest Genie
source has ra= 38.9886 dec= 55.2171 mag=19.10 sep=7.36".
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 151 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 02:35:57.26 = 38.98860
DEC(J2000) = +55:13:01.6 = 55.21710
with a 90%-confidence error radius of about 0.67 arc sec. This position is 7.36
arc sec. from the center of the XRT error circle. The estimated magnitude is
19.10 with a 1-sigma error of about 0.17. 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?
677236410 150 WHITE srclist found no candidates.
677236410 150 WHITE image found no candidates.
List afterglow candidates for other finding charts.
677236568 308 U srclist found no candidates.
677236568 308 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 55.21567
GRB_ERROR: 5.5
GRB_RA: 38.98604
IMAGE_START_TIME: 09:13:25
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT