srclist overlap message for exposure 2 of trigger 999948
uvot_overlap.pl vrs. 2010-12-20b fem started at 201013d08h45m19s553864usUT
The observation of trigger 999948 started 2020-10-13T03:51:42.1
Examining file ./999948_g311_uvot_sky_srclist.fits
The exposure ID is 624253902
The exposure time is undefined.
The filter is U.
The uvot region is centered at (107.3951,57.0364) with a roll angle of 93.2
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 (107.3880,57.0360) with a radius of 3.000 arc min
This is 0.235 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 (107.3942,57.0342) with a radius of 0.032 arc min
This is 0.136 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 2 of trigger 999948
find_uvot_ag.pl vrs. 2017-02-17 fem started at 201013d08h45m36s896231usUT
Observation start time is 2020-10-13T03:51:42.1
Examining file ./999948_g311_uvot_catalog_srclist.fits
The exposure ID is 624253902
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 185 detected source(s) for 999948_g311
Aspect correction adds 0.00308 degrees (0.739 sec of time = 6.03 arc sec) to RA
Aspect correction adds -0.00082 degrees (-2.94 arcsec) to Dec
Total aspect correction is 6.70 arcsec
Star catalogs centered at 107.3927 , 57.0368 with radius 8.26 arc min.
n_usno: 1033 n_gsc: 0
*** WARNING -- bright star catalog has 6 entries brighter than 12 mag
The brightest has mag 8.69072
RA DEC Mag Color
bright star 0: 107.43117 (07:09:43.48) 57.01833 (+57:01:06.0) 11.18 USNO-V
bright star 1: 107.34346 (07:09:22.43) 57.10908 (+57:06:32.7) 8.69 USNO-V
bright star 2: 107.25537 (07:09:01.29) 56.97427 (+56:58:27.4) 11.73 USNO-R
bright star 3: 107.46331 (07:09:51.19) 57.13262 (+57:07:57.4) 10.46 USNO-V
bright star 4: 107.14535 (07:08:34.88) 57.03428 (+57:02:03.4) 10.94 USNO-V
bright star 5: 107.41191 (07:09:38.86) 56.90063 (+56:54:02.3) 11.89 USNO-V
Mean distance difference (CAT_DELTA) for 105 matched entries is 0.954" for 999948_g311
Mean and std. dev of mag. difference (MAG_DELTA) are 1.746 and 1.210 for 999948_g311
Found 81 entries without IDs and 8 entries that are acceptable afterglow candidates for 999948_g311.
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.
61 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=107.3880 (07:09:33.12) DEC=57.0360 (+57:02:09.6)
XRT distances are from RA=107.3942 (07:09:34.62) DEC=57.0342 (+57:02:03.2)
*** WARNING 43 per cent of entries have no IDs.
-----------------
Entry 7 in the list of sources is a candidate afterglow for 999948_g311 with 1x1 stamp
ra=107.41580 (07:09:39.79) dec=57.01748 (+57:01:02.9) +/- 1.1" mag=18.65+/-0.35
dist=73.6 REFID=181
*** The position of this source is inconsistent with the XRT position.
The position is 86.1 arc sec from the BAT position.
src: 7 distr. of nearby unmatched sources: 0 0 0 1 0
Found 5 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
107.4169 57.0201 9.6 -1 USNO-B1 20.86 20.01 20.39
107.4174 57.0186 5.1 -1 USNO-B1 14.38 13.12 13.68
107.4215 57.0188 12.1 -1 USNO-B1 99.99 17.50 99.99
107.4232 57.0185 14.9 -1 USNO-B1 99.99 17.53 99.99
107.4245 57.0183 17.3 -1 USNO-B1 99.99 17.27 99.99
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 12 in the list of sources is a candidate afterglow for 999948_g311 with 1x1 stamp
ra=107.43570 (07:09:44.57) dec=57.04673 (+57:02:48.2) +/- 1.1" mag=18.79+/-0.35
dist=92.8 REFID=178
*** The position of this source is inconsistent with the XRT position.
The position is 101.1 arc sec from the BAT position.
src: 12 distr. of nearby unmatched sources: 0 0 0 0 0
Found 3 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
107.4312 57.0505 16.0 -1 USNO-B1 15.73 14.77 15.20
107.4366 57.0458 3.7 -1 USNO-B1 99.99 19.40 99.99 *
107.4364 57.0463 2.1 -1 USNO-B1 16.91 15.89 16.34 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 17 in the list of sources is a candidate afterglow for 999948_g311 with 3x3 stamp
ra=107.44004 (07:09:45.61) dec=57.01417 (+57:00:51.0) +/- 1.1" mag=19.23+/-0.35
dist=115.2 REFID=107
*** The position of this source is inconsistent with the XRT position.
The position is 128.7 arc sec from the BAT position.
src: 17 distr. of nearby unmatched sources: 1 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
107.4371 57.0185 16.7 -1 USNO-B1 20.45 18.96 19.62
107.4379 57.0183 15.6 -1 USNO-B1 99.99 17.55 99.99
107.4383 57.0184 15.5 -1 USNO-B1 21.08 18.20 19.48
107.4310 57.0138 17.7 -1 USNO-B1 20.53 18.05 19.15
107.4401 57.0184 15.2 -1 USNO-B1 99.99 19.56 99.99
107.4406 57.0147 2.2 -1 USNO-B1 18.07 17.27 17.62 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 19 in the list of sources is a candidate afterglow for 999948_g311 with 1x1 stamp
ra=107.44071 (07:09:45.77) dec=57.01395 (+57:00:50.2) +/- 1.1" mag=18.79+/-0.35
dist=116.7 REFID=165
*** The position of this source is inconsistent with the XRT position.
The position is 130.3 arc sec from the BAT position.
src: 19 distr. of nearby unmatched sources: 1 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
107.4371 57.0185 17.9 -1 USNO-B1 20.45 18.96 19.62
107.4379 57.0183 16.7 -1 USNO-B1 99.99 17.55 99.99
107.4383 57.0184 16.6 -1 USNO-B1 21.08 18.20 19.48
107.4310 57.0138 19.0 -1 USNO-B1 20.53 18.05 19.15
107.4401 57.0184 16.1 -1 USNO-B1 99.99 19.56 99.99
107.4406 57.0147 2.7 -1 USNO-B1 18.07 17.27 17.62 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 23 in the list of sources is a candidate afterglow for 999948_g311 with 1x1 stamp
ra=107.30259 (07:09:12.62) dec=57.03443 (+57:02:03.9) +/- 1.1" mag=18.79+/-0.35
dist=179.6 REFID=139
*** The position of this source is inconsistent with the XRT position.
The position is 167.4 arc sec from the BAT position.
src: 23 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
107.3037 57.0343 2.2 -1 USNO-B1 16.30 15.32 15.76 *
107.2987 57.0383 16.0 -1 USNO-B1 14.88 14.13 14.46
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 999948_g311 with 1x1 stamp
ra=107.32080 (07:09:16.99) dec=57.00224 (+57:00:08.1) +/- 1.1" mag=18.79+/-0.35
dist=184.4 REFID=150
*** The position of this source is inconsistent with the XRT position.
The position is 179.2 arc sec from the BAT position.
src: 28 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
107.3220 57.0033 4.4 -1 USNO-B1 15.12 14.43 14.74
107.3163 57.0021 8.9 -1 USNO-B1 20.23 19.69 19.93
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 29 in the list of sources is a candidate afterglow for 999948_g311 with 1x1 stamp
ra=107.47120 (07:09:53.09) dec=57.06026 (+57:03:36.9) +/- 1.1" mag=18.79+/-0.35
dist=177.4 REFID=170
*** The position of this source is inconsistent with the XRT position.
The position is 184.8 arc sec from the BAT position.
src: 29 distr. of nearby unmatched sources: 1 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
107.4672 57.0614 8.9 -1 USNO-B1 99.99 19.75 99.99
107.4684 57.0612 6.5 -1 USNO-B1 99.99 18.68 99.99
107.4717 57.0584 6.6 -1 USNO-B1 99.99 19.34 99.99
107.4734 57.0584 7.8 -1 USNO-B1 99.99 19.18 99.99
107.4730 57.0611 4.7 -1 USNO-B1 13.70 11.27 12.34 *
107.4774 57.0610 12.5 -1 USNO-B1 20.70 99.99 99.99
107.4785 57.0610 14.5 -1 USNO-B1 20.78 99.99 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 30 in the list of sources is a candidate afterglow for 999948_g311 with 1x1 stamp
ra=107.47192 (07:09:53.26) dec=57.05986 (+57:03:35.5) +/- 1.1" mag=18.79+/-0.35
dist=177.9 REFID=145
*** The position of this source is inconsistent with the XRT position.
The position is 185.4 arc sec from the BAT position.
src: 30 distr. of nearby unmatched sources: 1 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
107.4672 57.0614 10.8 -1 USNO-B1 99.99 19.75 99.99
107.4684 57.0612 8.5 -1 USNO-B1 99.99 18.68 99.99
107.4717 57.0584 5.1 -1 USNO-B1 99.99 19.34 99.99
107.4734 57.0584 5.8 -1 USNO-B1 99.99 19.18 99.99
107.4730 57.0611 5.0 -1 USNO-B1 13.70 11.27 12.34 *
107.4774 57.0610 11.6 -1 USNO-B1 20.70 99.99 99.99
107.4785 57.0610 13.5 -1 USNO-B1 20.78 99.99 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
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
107.3935 57.0342 1.5 -1 USNO-B1 16.24 16.19 16.21
The closest star is 1.47" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=107.39401 (07:09:34.56) dec=57.03416 (+57:02:03.0) +/- 1.1" mag=17.41+/-0.35 dist=0.5 REFID=33
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.12, 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 2 of trigger 999948
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 GRB201013 (Swift/BAT trigger 999948) at 03:46:30 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
285 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
coverage of the XRT error circle by the 8'x8' region for the list of sources
generated on-board is uncertain because the large number of sources filled the
available telemetry. 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 0.05.
------- notes for trigger 999948 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 201013d08h45m40s757384usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=999948
-expid=624253902 -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/999948/
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.
UVOT exposure began at MET 624253902.11438 or about 2020:287:03:51:37 UT
Found 1029 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 10% of the srclist region. Found 185 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 81 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 14 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
20.64 mag. Found 107 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 11% of the Genie image region.
Genie image analysis:
Found 11762.5 counts in the large background region of 5900.0 pixels or a rate
of 1.994 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 20.13 mag. for a
4-arcsec aperture.
Found 1531.6 counts in the XRT position region of 200.0 pixels or a rate of
7.658 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 4.519 +/- 0.160 (1-sigma) cps or
16.74 mag and a range from 16.70 to 16.78 mag. The 3-sigma UL at the XRT
position is 4.998 cps or 16.63 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 19.43 mag.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 107.3940 dec= 57.0342 mag=17.41 sep=0.52".
The closest srclist source has ra= 107.3940 dec= 57.0342 mag=17.41 sep=0.52".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 107.3935 dec= 57.0341 mag=16.50 sep=1.47". The closest Genie
source has ra= 107.3935 dec= 57.0341 mag=16.50 sep=1.47".
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
285 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 07:09:34.44 = 107.39352
DEC(J2000) = +57:02:02.8 = 57.03412
with a 90%-confidence error radius of about 0.62 arc sec. This position is 1.47
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.50 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.05.
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?
624253902 285 U srclist found no candidates.
624253902 285 U image found no candidates.
List afterglow candidates for other finding charts.
624253690 73 WHITE srclist found no candidates.
624253690 73 WHITE image found no candidates.
624254481 864 WHITE srclist found no candidates.
624254481 864 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 57.03422
GRB_ERROR: 5
GRB_RA: 107.39425
IMAGE_START_TIME: 03:51:37
MAGNITUDE: 16.6
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT