image overlap message for exposure 3 of trigger 882747
uvot_overlap.pl vrs. 2010-12-20b fem started at 190109d10h52m44s439445usUT
The observation of trigger 882747 started 2019-01-09T05:27:35.4
Examining file ./882747_g893_uvot_sky_image.fits
The exposure ID is 568704455
The exposure time is 149.846 (seconds)
The filter is WHITE.
The uvot region is centered at (33.1982,38.1066) with a roll angle of 259.5
It is square with sides of 2.68 arc min. for an area of 7.17 sq arc min
The BAT error circle is centered at (33.2180,38.1100) with a radius of 3.000 arc min
This is 0.959 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 7.17 sq. arc min or 0.25 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 0.222 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
image afterglow message for exposure 3 of trigger 882747
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190109d10h53m04s641112usUT
Observation start time is 2019-01-09T05:27:35.4
Examining file ./882747_g893_uvot_catalog_image.fits
The exposure ID is 568704455
The exposure is 149.846 sec.
The bin size is 2 pixels
The filter is WHITE
There are 14 detected source(s) for 882747_g893
Aspect correction adds -0.00199 degrees (-0.478 sec of time = -5.65 arc sec) to RA
Aspect correction adds 0.00090 degrees ( 3.25 arcsec) to Dec
Total aspect correction is 6.52 arcsec
Star catalogs centered at 33.1995 , 38.1054 with radius 2.53 arc min.
n_usno: 138 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.89912
RA DEC Mag Color
bright star 0: 33.20004 (02:12:48.01) 38.10745 (+38:06:26.8) 11.90 USNO-V
Mean distance difference (CAT_DELTA) for 11 matched entries is 0.403" for 882747_g893
Mean and std. dev of mag. difference (MAG_DELTA) are 0.440 and 1.542 for 882747_g893
Found 3 entries without IDs and 0 entries that are acceptable afterglow candidates for 882747_g893.
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.
3 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)
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 3:
ra= 33.20081 dec= 38.11005 +/- 0.7" mag=19.35+/-0.16 dist=6.7 REFID=10 flag=0
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
33.2000 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
33.2030 38.1071 5.7 -1 USNO-B1 19.84 99.99 99.99
33.2034 38.1076 4.7 -1 USNO-B1 20.27 18.63 19.36
33.2031 38.1086 2.5 -1 USNO-B1 17.93 99.99 99.99
33.2033 38.1085 3.2 -1 USNO-B1 19.96 18.42 19.10
33.2020 38.1093 3.0 -1 USNO-B1 19.31 19.46 19.39
The closest star is 2.55" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=33.20040 (02:12:48.10) dec=38.10757 (+38:06:27.3) +/- 0.6" mag=13.67+/-0.14 dist=6.1 REFID=11 flag=0
Unmatched source ra=33.20081 (02:12:48.19) dec=38.11005 (+38:06:36.2) +/- 0.7" mag=19.35+/-0.16 dist=6.7 REFID=10 flag=0
There are 58784.047 counts in the bkg source region of 5669.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 10.369 counts/pixel (5-sig UL in 4" is 20.08 mag) for 882747_g893
There are 12742.199 counts in the xrt source region of 197.00000 pixels.
Rate in xrt region with 8 arcsec radius is 64.681 counts/pixel for 882747_g893
There are 15127.866 counts in the xrt_bkg source region of 1129.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 13.399 counts/pixel (5-sig UL in 4" is 19.94 mag) for 882747_g893
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 20.63, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 882747_568704455_190109d10h53m04s641112usUT_bkg.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(33.1982,38.1066,45")
fk5;-circle(33.2061041359143,38.1066251082901,6")
fk5;-circle(33.2003984759327,38.1075705848843,6")
fk5;-circle(33.2042719601118,38.1108864695866,6")
fk5;-circle(33.2008071955669,38.1100518134369,6")
fk5;-circle(33.1976925188258,38.1113457239672,6")
fk5;-circle(33.1890427582145,38.1004398916415,6")
Region file: 882747_568704455_190109d10h53m04s641112usUT_xrt.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(33.20217,38.10853,8")
Region file: 882747_568704455_190109d10h53m04s641112usUT_xrt_bkg.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(33.20217,38.10853,25")
fk5;-circle(33.20217,38.10853,15")
fk5;-circle(33.2061041359143,38.1066251082901,6")
fk5;-circle(33.2042719601118,38.1108864695866,6")
fk5;-circle(33.1976925188258,38.1113457239672,6")
image paragraph message for exposure 3 of trigger 882747
SRCLIST PROBLEM: srclist filled telemetry buffer
2 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 150 seconds with the White filter
starting 871 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
0.05.
------- notes for trigger 882747 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190109d10h53m08s536460usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=882747
-expid=568704455 -meonly -msg_image
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 568704455.43574 or about 2019:009:05:27:30 UT
Found 1672 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 13% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 28 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 14 source(s) in Genie image catalog. 2 source(s) are within 10.0" of the
xrt position. Found 3 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.63 mag. Found 134 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 58784.0 counts in the large background region of 5669.0 pixels or a rate
of 10.369 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 20.08 mag. for a
4-arcsec aperture.
Found 12742.2 counts in the XRT position region of 197.0 pixels or a rate of
64.681 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 67.350 +/- 0.766 (1-sigma) cps or
15.21 mag and a range from 15.20 to 15.22 mag. The 3-sigma UL at the XRT
position is 69.648 cps or 15.17 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 19.51 mag.
Found 7 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 33.2028 dec= 38.1096 mag=19.35 sep=4.21".
The closest srclist source has ra= 33.2028 dec= 38.1096 mag=19.35 sep=4.21".
Found 2 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 33.2004 dec= 38.1076 mag=13.67 sep=6.09". The closest Genie
source has ra= 33.2004 dec= 38.1076 mag=13.67 sep=6.09".
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 150 seconds with the White filter
starting 871 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 02:12:48.10 = 33.20040
DEC(J2000) = +38:06:27.3 = 38.10757
with a 90%-confidence error radius of about 0.61 arc sec. This position is 6.09
arc sec. from the center of the XRT error circle. The estimated magnitude is
13.67 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 150 seconds with the White filter
starting 871 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 02:12:48.68 = 33.20284
DEC(J2000) = +38:06:34.5 = 38.10957
with a 90%-confidence error radius of about 1.10 arc sec. This position is 4.21
arc sec. from the center of the XRT error circle. The estimated magnitude is
19.35 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?
568704455 871 WHITE srclist found no candidates.
568704455 871 WHITE 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.
568703923 339 U srclist found no candidates.
568703923 339 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 38.10853
GRB_ERROR: 5
GRB_RA: 33.20217
IMAGE_START_TIME: 05:27:30
MAGNITUDE: 15.2
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT