srclist overlap message for exposure 1 of trigger 969823
uvot_overlap.pl vrs. 2010-12-20b fem started at 200506d17h54m53s426538usUT
The observation of trigger 969823 started 2020-05-06T17:38:20.6
Examining file ./969823_g90_uvot_sky_srclist.fits
The exposure ID is 610479500
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (274.5031,-16.1524) with a roll angle of 81.7
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 (274.4980,-16.1520) with a radius of 3.000 arc min
This is 0.295 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 (274.5007,-16.1312) with a radius of 0.060 arc min
This is 1.282 arc min from the center of the uvot region
The area of the XRT error circle is 0.011 sq. arc min
The UVOT/XRT overlap is 0.011 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 1 of trigger 969823
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200506d17h54m55s765305usUT
Observation start time is 2020-05-06T17:38:20.6
Examining file ./969823_g90_uvot_catalog_srclist.fits
The exposure ID is 610479500
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 969823_g90
*** 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 969823_g90 has mag 18.93
Aspect correction adds 0.00191 degrees (0.458 sec of time = 6.60 arc sec) to RA
Aspect correction adds -0.00097 degrees (-3.49 arcsec) to Dec
Total aspect correction is 7.46 arcsec
Star catalogs centered at 274.5100 , -16.1547 with radius 6.48 arc min.
n_usno: 1915 n_gsc: 0
*** WARNING -- bright star catalog has 8 entries brighter than 12 mag
The brightest has mag 9.70432
RA DEC Mag Color
bright star 0: 274.49509 (18:17:58.82) -16.11858 (-16:07:06.9) 10.60 USNO-V
bright star 1: 274.55214 (18:18:12.51) -16.14408 (-16:08:38.7) 11.10 USNO-V
bright star 2: 274.43506 (18:17:44.41) -16.19148 (-16:11:29.3) 9.70 USNO-V
bright star 3: 274.44522 (18:17:46.85) -16.20754 (-16:12:27.2) 11.23 USNO-V
bright star 4: 274.45239 (18:17:48.57) -16.08993 (-16:05:23.8) 10.81 USNO-V
bright star 5: 274.55763 (18:18:13.83) -16.23140 (-16:13:53.1) 11.88 USNO-V
bright star 6: 274.45380 (18:17:48.91) -16.23147 (-16:13:53.3) 11.36 USNO-V
bright star 7: 274.49262 (18:17:58.23) -16.25657 (-16:15:23.6) 11.16 USNO-V
Mean distance difference (CAT_DELTA) for 176 matched entries is 0.813" for 969823_g90
Mean and std. dev of mag. difference (MAG_DELTA) are 1.808 and 0.631 for 969823_g90
Found 17 entries without IDs and 6 entries that are acceptable afterglow candidates for 969823_g90.
Acceptable entries have no ID, XRT distances < 9", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
10 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=274.4980 (18:17:59.52) DEC=-16.1520 (-16:09:07.2)
XRT distances are from RA=274.5007 (18:18:00.18) DEC=-16.1312 (-16:07:52.3)
-----------------
Entry 19 in the list of sources is a candidate afterglow for 969823_g90 with 1x1 stamp
ra=274.50638 (18:18:01.53) dec=-16.17088 (-16:10:15.2) +/- 1.1" mag=18.66+/-0.35
dist=144.2 REFID=176
*** The position of this source is inconsistent with the XRT position.
The position is 73.9 arc sec from the BAT position.
src: 19 distr. of nearby unmatched sources: 0 0 0 0 0
Found 4 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
274.5096 -16.1685 14.0 -1 USNO-B1 18.88 16.30 17.45
274.5032 -16.1684 14.0 -1 USNO-B1 16.55 13.29 14.74
274.5113 -16.1707 17.1 -1 USNO-B1 99.99 17.77 99.99
274.5059 -16.1712 2.3 -1 USNO-B1 18.00 15.27 16.48 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 21 in the list of sources is a candidate afterglow for 969823_g90 with 3x3 stamp
ra=274.48845 (18:17:57.23) dec=-16.17343 (-16:10:24.3) +/- 1.1" mag=16.97+/-0.35
dist=157.9 REFID=34
*** The position of this source is inconsistent with the XRT position.
The position is 83.9 arc sec from the BAT position.
src: 21 distr. of nearby unmatched sources: 1 1 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
274.4929 -16.1711 17.6 -1 USNO-B1 20.29 17.43 18.70
274.4927 -16.1743 14.9 -1 USNO-B1 14.52 12.77 13.55 *
274.4876 -16.1740 3.6 -1 USNO-B1 14.44 12.75 13.50 *
274.4856 -16.1730 10.1 -1 USNO-B1 19.58 16.34 17.78
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 24 in the list of sources is a candidate afterglow for 969823_g90 with 1x1 stamp
ra=274.48696 (18:17:56.87) dec=-16.17486 (-16:10:29.5) +/- 1.1" mag=17.71+/-0.35
dist=164.3 REFID=138
*** The position of this source is inconsistent with the XRT position.
The position is 90.7 arc sec from the BAT position.
src: 24 distr. of nearby unmatched sources: 1 1 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
274.4927 -16.1743 19.8 -1 USNO-B1 14.52 12.77 13.55 *
274.4876 -16.1740 3.9 -1 USNO-B1 14.44 12.75 13.50 *
274.4856 -16.1730 8.3 -1 USNO-B1 19.58 16.34 17.78
274.4819 -16.1761 18.1 -1 USNO-B1 19.00 15.28 16.93
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 81 in the list of sources is a candidate afterglow for 969823_g90 with 1x1 stamp
ra=274.53644 (18:18:08.75) dec=-16.12357 (-16:07:24.9) +/- 1.1" mag=18.55+/-0.35
dist=126.4 REFID=186
*** The position of this source is inconsistent with the XRT position.
The position is 167.8 arc sec from the BAT position.
src: 81 distr. of nearby unmatched sources: 0 0 0 0 0
Found 10 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
274.5333 -16.1282 20.0 -1 USNO-B1 18.62 16.23 17.29
274.5352 -16.1282 17.1 -1 USNO-B1 20.49 18.02 19.12
274.5308 -16.1224 19.8 -1 USNO-B1 99.99 17.94 99.99
274.5313 -16.1219 18.8 -1 USNO-B1 19.41 16.56 17.83
274.5363 -16.1245 3.2 -1 USNO-B1 17.92 16.34 17.04 *
274.5365 -16.1242 2.2 -1 USNO-B1 17.96 15.36 16.51 *
274.5337 -16.1194 17.9 -1 USNO-B1 19.45 16.94 18.05
274.5379 -16.1218 7.9 -1 USNO-B1 20.49 18.00 19.11
274.5413 -16.1232 16.9 -1 USNO-B1 20.30 18.62 19.37
274.5406 -16.1208 17.4 -1 USNO-B1 20.48 17.78 18.98
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 83 in the list of sources is a candidate afterglow for 969823_g90 with 1x1 stamp
ra=274.53431 (18:18:08.23) dec=-16.18368 (-16:11:01.2) +/- 1.1" mag=18.70+/-0.35
dist=221.7 REFID=187
*** The position of this source is inconsistent with the XRT position.
The position is 169.6 arc sec from the BAT position.
src: 83 distr. of nearby unmatched sources: 0 0 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
274.5309 -16.1806 16.1 -1 USNO-B1 20.41 18.81 19.52
274.5327 -16.1804 13.0 -1 USNO-B1 17.65 15.41 16.40
274.5350 -16.1787 18.2 -1 USNO-B1 16.58 15.56 16.02
274.5352 -16.1787 18.2 -1 USNO-B1 17.78 14.50 15.96
274.5319 -16.1837 8.3 -1 USNO-B1 18.32 99.99 99.99
274.5379 -16.1797 18.8 -1 USNO-B1 19.54 16.36 17.77
274.5376 -16.1807 15.8 -1 USNO-B1 99.99 16.55 99.99
274.5336 -16.1842 3.2 -1 USNO-B1 16.12 14.02 14.96 *
274.5353 -16.1872 13.0 -1 USNO-B1 15.57 13.98 14.68
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 96 in the list of sources is a candidate afterglow for 969823_g90 with 3x3 stamp
ra=274.52091 (18:18:05.02) dec=-16.19711 (-16:11:49.6) +/- 1.1" mag=17.93+/-0.35
dist=247.3 REFID=64
*** The position of this source is inconsistent with the XRT position.
The position is 180.7 arc sec from the BAT position.
src: 96 distr. of nearby unmatched sources: 1 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
274.5239 -16.1943 14.6 -1 USNO-B1 20.47 18.04 19.12
274.5235 -16.1947 12.6 -1 USNO-B1 99.99 19.59 99.99
274.5214 -16.1975 2.2 -1 USNO-B1 15.80 14.14 14.88 *
274.5200 -16.2015 16.1 -1 USNO-B1 20.12 17.32 18.57
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 2 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
274.5027 -16.1330 9.4 -1 USNO-B1 19.41 17.21 18.19
274.4995 -16.1332 8.3 -1 USNO-B1 19.68 16.75 18.05
The closest star is 8.28" 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 < 9",
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 969823
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 GRB200506 (Swift/BAT trigger 969823) at 17:36:49 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 65 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 969823 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200506d17h55m00s596314usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=969823
-expid=610479500 -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/969823/
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. 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 610479500.55838 or about 2020:127:17:38:15 UT
Found 1911 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 17 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 43 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 20.24 mag. Found 333 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
33% of the Genie image region.
Genie image analysis:
Found 117675.0 counts in the large background region of 5447.0 pixels or a rate
of 21.604 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 19.68 mag. for a
4-arcsec aperture.
Found 4460.6 counts in the XRT position region of 199.0 pixels or a rate of
22.415 counts/pixel in a radius of 8.0 arcsec. The net count rate (using large
background region) at the XRT position is 1.077 +/- 0.453 (1-sigma) cps or
19.70 mag and a range from 19.32 to 20.29 mag. The 3-sigma UL at the XRT
position is 2.436 cps or 18.81 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.93 mag. The closest
srclist source has ra= 274.5014 dec= -16.1344 mag=16.88 sep=11.79". The closest
Genie source has ra= 274.5039 dec= -16.1306 mag=19.75 sep=11.04".
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?
610479500 65 WHITE srclist found no candidates.
610479500 65 WHITE image found no candidates.
List afterglow candidates for other finding charts.
610479712 277 U srclist found no candidates.
610479712 277 ? image data are not available.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -16.13119
GRB_ERROR: 9
GRB_RA: 274.50075
IMAGE_START_TIME: 17:38:15
MAGNITUDE: 18.8
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT