srclist overlap message for exposure 1 of trigger 998344
uvot_overlap.pl vrs. 2010-12-20b fem started at 201001d13h50m41s226903usUT
The observation of trigger 998344 started 2020-10-01T10:01:16.9
Examining file ./998344_g144_uvot_sky_srclist.fits
The exposure ID is 623239276
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (110.0743,-2.2102) with a roll angle of 93.1
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 (110.0700,-2.2100) with a radius of 3.000 arc min
This is 0.255 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 (110.0809,-2.2110) with a radius of 0.052 arc min
This is 0.400 arc min from the center of the uvot region
The area of the XRT error circle is 0.008 sq. arc min
The UVOT/XRT overlap is 0.008 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 1 of trigger 998344
find_uvot_ag.pl vrs. 2017-02-17 fem started at 201001d13h50m46s032572usUT
Observation start time is 2020-10-01T10:01:16.9
Examining file ./998344_g144_uvot_catalog_srclist.fits
The exposure ID is 623239276
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 998344_g144
*** 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 998344_g144 has mag 18.88
Aspect correction adds 0.00220 degrees (0.528 sec of time = 7.92 arc sec) to RA
Aspect correction adds -0.00006 degrees (-0.22 arcsec) to Dec
Total aspect correction is 7.92 arcsec
Star catalogs centered at 110.0758 , -2.2141 with radius 6.23 arc min.
n_usno: 1544 n_gsc: 0
*** WARNING -- bright star catalog has 7 entries brighter than 12 mag
The brightest has mag 10.71488
RA DEC Mag Color
bright star 0: 110.08591 (07:20:20.62) -2.19694 (-02:11:49.0) 11.71 USNO-V
bright star 1: 110.10379 (07:20:24.91) -2.23285 (-02:13:58.2) 10.71 USNO-V
bright star 2: 110.07856 (07:20:18.86) -2.15601 (-02:09:21.6) 11.10 USNO-V
bright star 3: 110.04031 (07:20:09.67) -2.26740 (-02:16:02.6) 11.94 USNO-V
bright star 4: 110.00496 (07:20:01.19) -2.22137 (-02:13:16.9) 10.72 USNO-V
bright star 5: 110.04362 (07:20:10.47) -2.28164 (-02:16:53.9) 11.73 USNO-V
bright star 6: 110.03232 (07:20:07.76) -2.27976 (-02:16:47.1) 11.88 USNO-V
Mean distance difference (CAT_DELTA) for 190 matched entries is 0.680" for 998344_g144
Mean and std. dev of mag. difference (MAG_DELTA) are 1.175 and 0.631 for 998344_g144
Found 8 entries without IDs and 4 entries that are acceptable afterglow candidates for 998344_g144.
Acceptable entries have no ID, XRT distances < 7.75", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
3 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=110.0700 (07:20:16.80) DEC=-2.2100 (-02:12:36.0)
XRT distances are from RA=110.0809 (07:20:19.41) DEC=-2.2110 (-02:12:39.7)
-----------------
Entry 85 in the list of sources is a candidate afterglow for 998344_g144 with 1x1 stamp
ra=110.02110 (07:20:05.06) dec=-2.20049 (-02:12:01.8) +/- 1.1" mag=18.29+/-0.35
dist=218.3 REFID=139
*** The position of this source is inconsistent with the XRT position.
The position is 179.2 arc sec from the BAT position.
src: 85 distr. of nearby unmatched sources: 1 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
110.0225 -2.1997 5.9 -1 USNO-B1 13.22 12.61 12.88 *
110.0218 -2.2026 8.1 -1 USNO-B1 99.99 19.79 99.99
110.0224 -2.1999 5.2 -1 USNO-B1 13.36 12.70 12.99 *
110.0175 -2.1994 13.5 -1 USNO-B1 17.77 16.66 17.16
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 86 in the list of sources is a candidate afterglow for 998344_g144 with 3x3 stamp
ra=110.05338 (07:20:12.81) dec=-2.25700 (-02:15:25.2) +/- 1.1" mag=17.50+/-0.35
dist=192.8 REFID=78
*** The position of this source is inconsistent with the XRT position.
The position is 179.4 arc sec from the BAT position.
src: 86 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
110.0587 -2.2584 19.6 -1 USNO-B1 19.11 18.26 18.64
110.0528 -2.2569 2.2 -1 USNO-B1 15.69 15.62 15.65 *
110.0526 -2.2568 3.0 -1 USNO-B1 15.45 15.23 15.33 *
110.0518 -2.2566 5.9 -1 USNO-B1 16.06 15.14 15.55
110.0522 -2.2615 16.8 -1 USNO-B1 20.05 18.64 19.26
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 102 in the list of sources is a candidate afterglow for 998344_g144 with 3x3 stamp
ra=110.11772 (07:20:28.25) dec=-2.18736 (-02:11:14.5) +/- 1.1" mag=17.94+/-0.35
dist=157.6 REFID=98
*** The position of this source is inconsistent with the XRT position.
The position is 190.0 arc sec from the BAT position.
src: 102 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
110.1145 -2.1863 12.2 -1 USNO-B1 17.80 17.02 17.37
110.1181 -2.1908 12.4 -1 USNO-B1 16.66 15.77 16.16
110.1161 -2.1864 6.6 -1 USNO-B1 20.69 19.25 19.89
110.1183 -2.1886 4.9 -1 USNO-B1 16.42 16.84 16.65
110.1180 -2.1878 2.0 -1 USNO-B1 15.89 15.17 15.49 *
110.1184 -2.1873 2.3 -1 USNO-B1 19.67 18.74 19.15 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 111 in the list of sources is a candidate afterglow for 998344_g144 with 1x1 stamp
ra=110.09018 (07:20:21.64) dec=-2.26092 (-02:15:39.3) +/- 1.1" mag=18.23+/-0.35
dist=182.7 REFID=176
*** The position of this source is inconsistent with the XRT position.
The position is 197.2 arc sec from the BAT position.
src: 111 distr. of nearby unmatched sources: 0 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
110.0861 -2.2583 17.5 -1 USNO-B1 18.97 17.64 18.23
110.0865 -2.2586 15.6 -1 USNO-B1 19.33 18.07 18.63
110.0927 -2.2575 15.4 -1 USNO-B1 18.18 17.13 17.60
110.0904 -2.2598 4.0 -1 USNO-B1 15.57 14.32 14.88
110.0906 -2.2664 19.9 -1 USNO-B1 16.77 16.14 16.42
*** If XRT position is correct, then this is NOT the afterglow
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
110.0784 -2.2100 9.7 -1 USNO-B1 19.95 18.55 19.17
The closest star is 9.72" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=110.07877 (07:20:18.91) dec=-2.21275 (-02:12:45.9) +/- 1.1" mag=18.62+/-0.35 dist=9.8 REFID=188
There are 1 candidate(s) outside XRT error circle with mag < 18.66
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.22, XRT distances < 7.75",
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 1 of trigger 998344
SRCLIST PROBLEM: srclist filled telemetry buffer
------ Start for Possible Stand-alone Circular ----
In response to GRB201001 (Swift/BAT trigger 998344) at 09:58:51 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 119 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 expected extinction corresponding to E(B-V) of
0.12.
------- notes for trigger 998344 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 201001d13h50m51s870442usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=998344
-expid=623239276 -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/998344/
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 623239276.9107 or about 2020:275:10:01:11 UT
Found 1540 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 8 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 46 source(s) in Genie image catalog. Found 5 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.50 mag. Found 270 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
25% of the Genie image region.
Genie image analysis:
Found 66472.4 counts in the large background region of 5000.0 pixels or a rate
of 13.294 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 19.95 mag. for a
4-arcsec aperture.
Found 2637.2 counts in the XRT position region of 201.0 pixels or a rate of
13.120 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.469 +/- 0.373 (1-sigma) cps. The
3-sigma UL at the XRT position is 1.119 cps or 19.66 mag. The number of srclist
sources filled the available telemetry. The weakest source detected was 18.88
mag.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 110.0788 dec= -2.2127 mag=18.62 sep=9.76".
The closest srclist source has ra= 110.0788 dec= -2.2127 mag=18.62 sep=9.76".
The closest Genie source has ra= 110.0785 dec= -2.2129 mag=18.20 sep=10.90".
This paragraph is only useful if the XRT position is grossly wrong. There are 1
candidate(s) in the srclist data with mag < 18.66 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=110.09018
(07:20:21.64), DEC=-2.26092 (-02:15:39.3) (J2000). It has a mag of 18.23. It is
197.2" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 119 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 07:20:21.64 = 110.09018
DEC(J2000) = -02:15:39.3 = -2.26092
with a 90%-confidence error radius of about 1.10 arc sec. The estimated
magnitude is 18.23 with a 1-sigma error of about 0.35. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.12.
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 119 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 07:20:18.90 = 110.07877
DEC(J2000) = -02:12:45.9 = -2.21275
with a 90%-confidence error radius of about 1.10 arc sec. This position is 9.76
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.62 with a 1-sigma error of about 0.35. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.12.
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?
623239276 118 WHITE srclist found no candidates.
623239276 118 WHITE image found no candidates.
List afterglow candidates for other finding charts.
623239435 277 U srclist found no candidates.
623239435 277 U image found no candidates.
623240014 856 WHITE srclist found no candidates.
623240014 856 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -2.21103
GRB_ERROR: 7.75
GRB_RA: 110.08087
IMAGE_START_TIME: 10:01:11
MAGNITUDE: 19.7
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT