srclist overlap message for exposure 4 of trigger 1185673
uvot_overlap.pl vrs. 2010-12-20b fem started at 230817d03h24m42s210093usUT
The observation of trigger 1185673 started 2023-08-16T17:28:57.5
Examining file ./1185673_g4808_uvot_sky_srclist.fits
The exposure ID is 713899737
The exposure time is undefined.
The filter is U.
The uvot region is centered at (328.4439,37.8617) with a roll angle of 15.1
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 (328.3750,37.8280) with a radius of 3.000 arc min
This is 3.838 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 26.49 sq. arc min or 0.94 of the BAT error circle
The XRT error circle is centered at (328.4457,37.8549) with a radius of 0.038 arc min
This is 0.411 arc min from the center of the uvot region
The area of the XRT error circle is 0.005 sq. arc min
The UVOT/XRT overlap is 0.005 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 4 of trigger 1185673
find_uvot_ag.pl vrs. 2023-04-25a fem started at 230817d03h25m25s269604usUT
Observation start time is 2023-08-16T17:28:57.5
Examining file ./1185673_g4808_uvot_catalog_srclist.fits
The exposure ID is 713899737
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 190 detected source(s) for 1185673_g4808
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 0.856
srclist_overlap returned: xrt_overlap 1.000
Dimmest detected source in 1185673_g4808 has mag 18.71
Aspect correction adds -0.00038 degrees (-0.091 sec of time = -1.08 arc sec) to RA
Aspect correction adds 0.00178 degrees ( 6.42 arcsec) to Dec
Total aspect correction is 6.52 arcsec
Star catalogs centered at 328.4485 , 37.8713 with radius 10.23 arc min.
n_usno: 3258 n_gsc: 2782
*** WARNING -- bright star catalog has 5 entries brighter than 12 mag
The brightest has mag 9.55712
RA DEC Mag Color
bright star 0: 328.41821 (21:53:40.37) 37.95924 (+37:57:33.3) 9.56 GSC-F
bright star 1: 328.46117 (21:53:50.68) 37.96897 (+37:58:08.3) 11.58 USNO-V
bright star 2: 328.59976 (21:54:23.94) 37.97234 (+37:58:20.4) 10.08 GSC-V
bright star 3: 328.35963 (21:53:26.31) 37.72946 (+37:43:46.0) 11.97 USNO-V
bright star 4: 328.60321 (21:54:24.77) 37.85841 (+37:51:30.3) 11.90 GSC-V
Mean distance difference (CAT_DELTA) for 122 matched entries is 0.952" for 1185673_g4808
Mean and std. dev of mag. difference (MAG_DELTA) are 2.549 and 0.910 for 1185673_g4808
Found 73 entries without IDs and 5 entries that are acceptable afterglow candidates for 1185673_g4808.
Acceptable entries have no ID, XRT distances < 5.75", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
45 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=328.3750 (21:53:30.00) DEC=37.8280 (+37:49:40.8)
XRT distances are from RA=328.4457 (21:53:46.96) DEC=37.8549 (+37:51:17.8)
*** WARNING 38 per cent of entries have no IDs.
-----------------
Entry 4 in the list of sources is a candidate afterglow for 1185673_g4808 with 1x1 stamp
ra=328.37159 (21:53:29.18) dec=37.80707 (+37:48:25.5) +/- 1.1" mag=18.21+/-0.35
dist=272.2 REFID=163
*** The position of this source is inconsistent with the XRT position.
The position is 79.5 arc sec from the BAT position.
src: 4 distr. of nearby unmatched sources: 0 0 0 0 0
Found 9 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
328.3730 37.8112 15.4 -1 USNO-B1 19.27 17.54 18.30
328.3759 37.8075 12.4 -1 USNO-B1 26.71 99.99 99.99
328.3722 37.8076 2.6 -1 USNO-B1 16.68 14.62 15.53 *
328.3725 37.8034 13.5 -1 USNO-B1 20.60 19.03 19.73
328.3658 37.8057 17.3 -1 USNO-B1 18.04 16.15 16.99
328.3731 37.8110 14.7 -1 GSC2.3 17.37 18.49 17.85
328.3722 37.8075 2.3 -1 GSC2.3 14.19 15.59 14.91 *
328.3727 37.8032 14.4 -1 GSC2.3 19.07 20.43 19.08
328.3658 37.8055 17.3 -1 GSC2.3 15.83 17.06 16.47
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 8 in the list of sources is a candidate afterglow for 1185673_g4808 with 1x1 stamp
ra=328.36148 (21:53:26.76) dec=37.85498 (+37:51:17.9) +/- 1.1" mag=17.96+/-0.35
dist=239.3 REFID=111
*** The position of this source is inconsistent with the XRT position.
The position is 101.1 arc sec from the BAT position.
src: 8 distr. of nearby unmatched sources: 0 0 0 0 0
Found 4 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
328.3654 37.8561 11.8 -1 USNO-B1 17.86 16.70 17.21
328.3616 37.8560 3.6 -1 USNO-B1 15.66 14.99 15.29 *
328.3655 37.8559 12.0 -1 GSC2.3 16.74 17.78 17.15
328.3616 37.8558 3.1 -1 GSC2.3 14.69 15.85 15.32 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 9 in the list of sources is a candidate afterglow for 1185673_g4808 with 3x3 stamp
ra=328.39338 (21:53:34.41) dec=37.85320 (+37:51:11.5) +/- 1.1" mag=17.05+/-0.35
dist=148.8 REFID=43
*** The position of this source is inconsistent with the XRT position.
The position is 101.6 arc sec from the BAT position.
src: 9 distr. of nearby unmatched sources: 0 0 0 0 0
Found 2 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
328.3937 37.8540 2.8 -1 USNO-B1 14.15 13.32 13.69 *
328.3937 37.8538 2.4 -1 GSC2.3 12.89 14.21 13.54 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 14 in the list of sources is a candidate afterglow for 1185673_g4808 with 1x1 stamp
ra=328.42313 (21:53:41.55) dec=37.84034 (+37:50:25.2) +/- 1.1" mag=18.52+/-0.35
dist=82.9 REFID=157
*** The position of this source is inconsistent with the XRT position.
The position is 142.8 arc sec from the BAT position.
src: 14 distr. of nearby unmatched sources: 0 0 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
328.4237 37.8409 2.7 -1 USNO-B1 15.44 13.87 14.56 *
328.4295 37.8380 19.9 -1 USNO-B1 16.66 15.91 16.25
328.4177 37.8432 18.7 -1 USNO-B1 18.98 16.95 17.85
328.4209 37.8409 6.5 -1 USNO-B1 99.99 19.43 99.99
328.4238 37.8408 2.5 -1 GSC2.3 13.61 15.68 14.36 *
328.4178 37.8431 18.1 -1 GSC2.3 16.88 19.24 17.84
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 28 in the list of sources is a candidate afterglow for 1185673_g4808 with 1x1 stamp
ra=328.43419 (21:53:44.21) dec=37.85831 (+37:51:29.9) +/- 1.1" mag=18.30+/-0.35
dist=34.8 REFID=148
*** The position of this source is inconsistent with the XRT position.
The position is 198.6 arc sec from the BAT position.
src: 28 distr. of nearby unmatched sources: 0 0 0 0 0
Found 7 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
328.4369 37.8597 9.3 -1 USNO-B1 19.92 99.99 99.99
328.4355 37.8595 5.7 -1 USNO-B1 17.27 19.20 18.34
328.4357 37.8593 5.5 -1 USNO-B1 17.57 17.42 17.49
328.4350 37.8591 3.6 -1 USNO-B1 15.27 14.41 14.79 *
328.4306 37.8629 19.5 -1 USNO-B1 21.53 19.51 20.40
328.4310 37.8627 18.2 -1 GSC2.3 19.68 99.99 99.99
328.4349 37.8589 2.9 -1 GSC2.3 14.09 15.29 14.84 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 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
328.4475 37.8572 9.6 -1 USNO-B1 15.99 14.94 15.41
328.4444 37.8563 6.1 -1 USNO-B1 19.38 17.49 18.33
328.4475 37.8570 9.1 -1 GSC2.3 14.71 16.21 15.41
328.4444 37.8561 5.6 -1 GSC2.3 17.58 19.73 18.34
The closest star is 5.63" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=328.44718 (21:53:47.32) dec=37.85705 (+37:51:25.4) +/- 1.1" mag=18.09+/-0.35 dist=8.7 REFID=62
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 18.12, XRT distances < 5.75",
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 4 of trigger 1185673
SRCLIST PROBLEM: srclist filled telemetry buffer
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 GRB230816 (Swift/BAT trigger 1185673) at 16:08:48 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
4777 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 19.2 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 18.0 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.312.
------- notes for trigger 1185673 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 230817d03h25m30s269420usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1185673
-expid=713899737 -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/1185673/
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.
*** Warning -- BAT and XRT error circles do NOT overlap.
UVOT exposure began at MET 713899737.49336 or about 2023:228:17:28:52 UT
Found 3254 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 21% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 73 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.12 mag.
Found 17 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
20.54 mag. Found 345 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 14104.4 counts in the large background region of 5827.0 pixels or a rate
of 2.421 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 19.80 mag. for a
4-arcsec aperture.
Found 694.6 counts in the XRT position region of 200.0 pixels or a rate of
3.473 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.849 +/- 0.112 (1-sigma) cps or
18.34 mag and a range from 18.20 to 18.49 mag. The 3-sigma UL at the XRT
position is 1.183 cps or 17.98 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.71 mag.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 328.4472 dec= 37.8571 mag=18.09 sep=8.72".
The closest srclist source has ra= 328.4472 dec= 37.8571 mag=18.09 sep=8.72".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 328.4474 dec= 37.8571 mag=16.98 sep=9.30". The closest Genie
source has ra= 328.4474 dec= 37.8571 mag=16.98 sep=9.30".
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 250 seconds with the U filter starting
4777 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 21:53:47.37 = 328.44736
DEC(J2000) = +37:51:25.7 = 37.85715
with a 90%-confidence error radius of about 0.62 arc sec. This position is 9.30
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.98 with a 1-sigma error of about 0.15. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.312.
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?
713899737 4776 U srclist found no candidates.
713899737 4776 U image found no candidates.
List afterglow candidates for other finding charts.
713895053 92 WHITE srclist found no candidates.
713895053 92 WHITE image found no candidates.
713895266 305 U srclist found no candidates.
713895266 305 U image found no candidates.
713895821 860 WHITE srclist found no candidates.
713895821 860 WHITE image found no candidates.
713899992 5031 B srclist found no candidates.
713899992 5031 B image found no candidates.
713900561 5600 B srclist found no candidates.
713900561 5600 B image found no candidates.
713900873 5912 U srclist found no candidates.
713900873 5912 U image found no candidates.
713901129 6168 B srclist found no candidates.
713901129 6168 B image found no candidates.
713905487 10526 ? srclist data are not available.
713905487 10526 U image found no candidates.
713905742 10781 ? srclist data are not available.
713905742 10781 B image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 37.85494
GRB_ERROR: 5.75
GRB_RA: 328.44567
IMAGE_START_TIME: 17:28:52
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT