srclist overlap message for exposure 2 of trigger 882747
uvot_overlap.pl vrs. 2010-12-20b fem started at 190109d10h52m41s886535usUT
The observation of trigger 882747 started 2019-01-09T05:18:43.5
Examining file ./882747_g361_uvot_sky_srclist.fits
The exposure ID is 568703923
The exposure time is undefined.
The filter is U.
The uvot region is centered at (33.1994,38.1064) with a roll angle of 259.5
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 (33.2180,38.1100) with a radius of 3.000 arc min
This is 0.907 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 (33.2022,38.1085) with a radius of 0.030 arc min
This is 0.186 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 882747
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190109d10h52m53s841761usUT
Observation start time is 2019-01-09T05:18:43.5
Examining file ./882747_g361_uvot_catalog_srclist.fits
The exposure ID is 568703923
The exposure is 249.946 sec.
The bin size is 2 pixels
The filter is U
There are 60 detected source(s) for 882747_g361
Aspect correction adds -0.00177 degrees (-0.425 sec of time = -5.02 arc sec) to RA
Aspect correction adds 0.00075 degrees ( 2.70 arcsec) to Dec
Total aspect correction is 5.70 arcsec
Star catalogs centered at 33.2150 , 38.1124 with radius 6.57 arc min.
n_usno: 874 n_gsc: 0
*** WARNING -- bright star catalog has 3 entries brighter than 12 mag
The brightest has mag 11.88986
RA DEC Mag Color
bright star 0: 33.20004 (02:12:48.01) 38.10745 (+38:06:26.8) 11.90 USNO-V
bright star 1: 33.26782 (02:13:04.28) 38.08459 (+38:05:04.5) 11.94 USNO-V
bright star 2: 33.22804 (02:12:54.73) 38.21232 (+38:12:44.3) 11.89 USNO-V
Mean distance difference (CAT_DELTA) for 47 matched entries is 0.742" for 882747_g361
Mean and std. dev of mag. difference (MAG_DELTA) are 1.295 and 0.835 for 882747_g361
Found 14 entries without IDs and 4 entries that are acceptable afterglow candidates for 882747_g361.
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.
8 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=33.2180 (02:12:52.32) DEC=38.1100 (+38:06:36.0)
XRT distances are from RA=33.2022 (02:12:48.52) DEC=38.1085 (+38:06:30.7)
-----------------
Entry 11 in the list of sources is a candidate afterglow for 882747_g361 with 3x3 stamp
ra=33.22118 (02:12:53.08) dec=38.12814 (+38:07:41.3) +/- 1.1" mag=19.87+/-0.35
dist=88.8 REFID=60
*** The position of this source is inconsistent with the XRT position.
The position is 65.9 arc sec from the BAT position.
src: 11 distr. of nearby unmatched sources: 0 0 0 0 0
Found 1 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
33.2222 38.1235 16.8 -1 USNO-B1 17.02 17.02 17.02
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 19 in the list of sources is a candidate afterglow for 882747_g361 with 5x5 stamp
ra=33.22641 (02:12:54.34) dec=38.14628 (+38:08:46.6) +/- 1.1" mag=18.67+/-0.35
dist=152.3 REFID=32
*** The position of this source is inconsistent with the XRT position.
The position is 132.8 arc sec from the BAT position.
src: 19 distr. of nearby unmatched sources: 1 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
33.2251 38.1457 4.4 -1 USNO-B1 20.57 18.89 19.64
33.2257 38.1456 3.2 -1 USNO-B1 20.77 18.79 19.67 *
33.2270 38.1470 3.0 -1 USNO-B1 16.55 15.89 16.19 *
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 882747_g361 with 5x5 stamp
ra=33.22742 (02:12:54.58) dec=38.14741 (+38:08:50.7) +/- 1.1" mag=17.95+/-0.35
dist=157.2 REFID=26
*** The position of this source is inconsistent with the XRT position.
The position is 137.3 arc sec from the BAT position.
src: 21 srclist_match has ID
src: 21 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
33.2251 38.1457 9.1 -1 USNO-B1 20.57 18.89 19.64
33.2257 38.1456 8.1 -1 USNO-B1 20.77 18.79 19.67
33.2270 38.1470 2.0 -1 USNO-B1 16.55 15.89 16.19 *
33.2340 38.1475 18.7 -1 USNO-B1 17.52 17.71 17.63
33.2219 38.1507 19.7 -1 USNO-B1 99.99 20.24 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 25 in the list of sources is a candidate afterglow for 882747_g361 with 3x3 stamp
ra=33.26042 (02:13:02.50) dec=38.08414 (+38:05:02.9) +/- 1.1" mag=19.58+/-0.35
dist=187.0 REFID=57
*** The position of this source is inconsistent with the XRT position.
The position is 152.0 arc sec from the BAT position.
src: 25 distr. of nearby unmatched sources: 0 0 0 0 4
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
33.2537 38.0841 18.9 -1 USNO-B1 99.99 20.12 99.99
33.2571 38.0807 15.5 -1 USNO-B1 18.22 18.71 18.50
33.2637 38.0848 9.7 -1 USNO-B1 16.28 18.21 17.35
33.2637 38.0846 9.4 -1 USNO-B1 99.99 19.96 99.99
*** If XRT position is correct, then this is NOT the afterglow
Found 7 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
33.2033 38.1085 3.2 -1 USNO-B1 19.96 18.42 19.10
33.2031 38.1086 2.5 -1 USNO-B1 17.93 99.99 99.99
33.2034 38.1076 4.7 -1 USNO-B1 20.27 18.63 19.36
33.2020 38.1093 3.0 -1 USNO-B1 19.31 19.46 19.39
33.2030 38.1071 5.7 -1 USNO-B1 19.84 99.99 99.99
33.2000 38.1075 7.2 -1 USNO-B1 12.30 11.57 11.90
33.1989 38.1083 9.4 -1 USNO-B1 19.96 19.25 19.57
The closest star is 2.55" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=33.20061 (02:12:48.15) dec=38.10714 (+38:06:25.7) +/- 1.1" mag=16.55+/-0.35 dist=6.7 REFID=12
Matched source ra=33.20034 (02:12:48.08) dec=38.10767 (+38:06:27.6) +/- 1.1" mag=14.02+/-0.35 dist=6.1 REFID=2
Matched source ra=33.20026 (02:12:48.06) dec=38.10748 (+38:06:26.9) +/- 1.1" mag=12.77+/-0.35 dist=6.6 REFID=4
Unmatched source ra=33.20078 (02:12:48.19) dec=38.10893 (+38:06:32.2) +/- 1.1" mag=18.57+/-0.35 dist=4.2 REFID=31
Unmatched source ra=33.19930 (02:12:47.83) dec=38.10933 (+38:06:33.6) +/- 1.1" mag=18.92+/-0.35 dist=8.6 REFID=45
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 882747
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 GRB190109 (Swift/BAT trigger 882747) at 05:12:41 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
339 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
0.05.
------- notes for trigger 882747 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190109d10h52m57s487732usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=882747
-expid=568703923 -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/882747/
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 568703923.52766 or about 2019:009:05:18:38 UT
Found 870 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 13% of the srclist region. Found 60 sources in
srclist catalog. Found 14 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 7 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
20.35 mag. Found 133 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 14% of the Genie image region.
Genie image analysis:
Found 20928.5 counts in the large background region of 6087.0 pixels or a rate
of 3.438 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 19.83 mag. for a
4-arcsec aperture.
Found 15235.9 counts in the XRT position region of 200.0 pixels or a rate of
76.180 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 57.403 +/- 0.496 (1-sigma) cps or
13.98 mag and a range from 13.97 to 13.99 mag. The 3-sigma UL at the XRT
position is 58.891 cps or 13.95 mag.
Found 5 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 33.2008 dec= 38.1089 mag=18.57 sep=4.20".
The closest srclist source has ra= 33.2008 dec= 38.1089 mag=18.57 sep=4.20".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 33.2000 dec= 38.1075 mag=11.75 sep=7.09". The closest Genie
source has ra= 33.2000 dec= 38.1075 mag=11.75 sep=7.09".
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
339 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 02:12:48.01 = 33.20003
DEC(J2000) = +38:06:27.0 = 38.10750
with a 90%-confidence error radius of about 0.61 arc sec. This position is 7.09
arc sec. from the center of the XRT error circle. The estimated magnitude is
11.75 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.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 250 seconds with the U filter starting
339 seconds after the BAT trigger. There is a candidate afterglow in the list
of sources generated on-board at
RA(J2000) = 02:12:48.19 = 33.20078
DEC(J2000) = +38:06:32.1 = 38.10893
with a 90%-confidence error radius of about 1.10 arc sec. This position is 4.20
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.57 with a 1-sigma error of about 0.35. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.05.
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?
568703923 339 U srclist found no candidates.
568703923 339 U image found no candidates.
List afterglow candidates for other finding charts.
568703764 180 WHITE srclist found no candidates.
568703764 180 WHITE image found no candidates.
568704455 871 WHITE srclist found no candidates.
568704455 871 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 38.10853
GRB_ERROR: 5
GRB_RA: 33.20217
IMAGE_START_TIME: 05:18:38
MAGNITUDE: 13.9
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT