image overlap message for exposure 3 of trigger 814677
uvot_overlap.pl vrs. 2010-12-20b fem started at 180316d14h31m01s502886usUT
The observation of trigger 814677 started 2018-03-16T05:12:15.6
Examining file ./814677_g889_uvot_sky_image.fits
The exposure ID is 542869935
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (265.4324,0.7493) with a roll angle of 91.8
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 (265.4360,0.7370) with a radius of 3.000 arc min
This is 0.767 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 (265.4285,0.7481) with a radius of 0.023 arc min
This is 0.239 arc min from the center of the uvot region
The area of the XRT error circle is 0.002 sq. arc min
The UVOT/XRT overlap is 0.002 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 3 of trigger 814677
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180316d14h31m37s395781usUT
Observation start time is 2018-03-16T05:12:15.6
Examining file ./814677_g889_uvot_catalog_image.fits
The exposure ID is 542869935
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 15 detected source(s) for 814677_g889
Aspect correction adds -0.00082 degrees (-0.198 sec of time = -2.97 arc sec) to RA
Aspect correction adds -0.00087 degrees (-3.13 arcsec) to Dec
Total aspect correction is 4.31 arcsec
Star catalogs centered at 265.4253 , 0.7468 with radius 2.59 arc min.
n_usno: 246 n_gsc: 269
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 10.9378
RA DEC Mag Color
bright star 0: 265.41321 (17:41:39.17) 0.73294 (+00:43:58.6) 10.94 GSC-F
Mean distance difference (CAT_DELTA) for 13 matched entries is 0.363" for 814677_g889
Mean and std. dev of mag. difference (MAG_DELTA) are 0.967 and 0.413 for 814677_g889
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 814677_g889.
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.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=265.4360 (17:41:44.64) DEC= 0.7370 (+00:44:13.2)
XRT distances are from RA=265.4285 (17:41:42.85) DEC= 0.7481 (+00:44:53.3)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 814677_g889 with genie
ra=265.42859 (17:41:42.86) dec=0.74817 (+00:44:53.4) +/- 0.6" mag=18.03+/-0.15
dist=0.2 REFID=8 major=1.0 minor=0.9 flag=0
Found 8 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
265.4253 0.7466 13.3 -1 USNO-B1 15.70 14.29 14.91
265.4284 0.7491 3.5 -1 USNO-B1 21.05 19.97 20.45
265.4293 0.7532 18.3 -1 USNO-B1 19.22 17.90 18.49
265.4290 0.7534 19.0 -1 USNO-B1 19.51 18.45 18.92
265.4252 0.7466 13.5 -1 GSC2.3 13.97 15.50 99.99
265.4261 0.7460 11.9 -1 GSC2.3 99.99 99.99 99.99
265.4284 0.7491 3.4 -1 GSC2.3 19.89 20.88 99.99 *
265.4288 0.7534 18.8 -1 GSC2.3 19.06 99.99 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 2 in the list of sources is a candidate afterglow for 814677_g889 with genie
ra=265.42482 (17:41:41.96) dec=0.74676 (+00:44:48.3) +/- 0.6" mag=16.25+/-0.14
dist=14.3 REFID=9 major=1.0 minor=0.9 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 53.4 arc sec from the BAT position.
Found 8 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
265.4253 0.7466 1.8 -1 USNO-B1 15.70 14.29 14.91 *
265.4284 0.7491 15.4 -1 USNO-B1 21.05 19.97 20.45
265.4205 0.7460 15.8 -1 USNO-B1 17.32 16.20 16.69
265.4252 0.7466 1.5 -1 GSC2.3 13.97 15.50 99.99 *
265.4261 0.7460 5.4 -1 GSC2.3 99.99 99.99 99.99
265.4284 0.7491 15.3 -1 GSC2.3 19.89 20.88 99.99
265.4205 0.7460 15.7 -1 GSC2.3 16.18 17.42 99.99
265.4235 0.7421 17.6 -1 GSC2.3 19.59 21.07 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 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
265.4284 0.7491 3.6 -1 USNO-B1 21.05 19.97 20.45
265.4284 0.7491 3.5 -1 GSC2.3 19.89 20.88 99.99
The closest star is 3.51" away.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=265.42859 (17:41:42.86) dec=0.74817 (+00:44:53.4) +/- 0.6" mag=18.03+/-0.15 dist=0.2 REFID=8 flag=0
There are 2.1395819E+05 counts in the bkg source region of 5695.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 37.569 counts/pixel (5-sig UL in 4" is 19.38 mag) for 814677_g889
There are 7984.4043 counts in the xrt source region of 197.00000 pixels.
Rate in xrt region with 8 arcsec radius is 40.530 counts/pixel for 814677_g889
There are 41355.555 counts in the xrt_bkg source region of 1095.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 37.768 counts/pixel (5-sig UL in 4" is 19.38 mag) for 814677_g889
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 19.94, 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: 814677_542869935_180316d14h31m37s395781usUT_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(265.4324,0.7493,45")
fk5;-circle(265.428593153312,0.748172516873674,6")
fk5;-circle(265.43045851315,0.753666178255144,6")
fk5;-circle(265.424822193889,0.746761877876295,6")
fk5;-circle(265.420516680206,0.746058375970115,6")
fk5;-circle(265.438840064873,0.754818996870731,6")
fk5;-circle(265.436492092537,0.741705176851256,6")
Region file: 814677_542869935_180316d14h31m37s395781usUT_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(265.42854,0.74814,8")
Region file: 814677_542869935_180316d14h31m37s395781usUT_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(265.42854,0.74814,25")
fk5;-circle(265.42854,0.74814,15")
fk5;-circle(265.43045851315,0.753666178255144,6")
fk5;-circle(265.424822193889,0.746761877876295,6")
fk5;-circle(265.420516680206,0.746058375970115,6")
image paragraph message for exposure 3 of trigger 814677
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 GRB180316 (Swift/BAT trigger 814677) at 04:57:25 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 869 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
0.28.
------- notes for trigger 814677 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180316d14h31m43s786138usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=814677
-expid=542869935 -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/814677/
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 542869935.64652 or about 2018:075:05:12:10 UT
Found 2425 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 13 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 15 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 2 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
19.94 mag. Found 269 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 27% of the Genie image region.
Genie image analysis:
Found 213958.2 counts in the large background region of 5695.0 pixels or a rate
of 37.569 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 19.38 mag. for a
4-arcsec aperture.
Found 7984.4 counts in the XRT position region of 197.0 pixels or a rate of
40.530 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 3.628 +/- 0.644 (1-sigma) cps or
18.38 mag and a range from 18.20 to 18.59 mag. The 3-sigma UL at the XRT
position is 5.559 cps or 17.92 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= 265.4286 dec= 0.7484 mag=18.43 sep=0.95".
The closest srclist source has ra= 265.4286 dec= 0.7484 mag=18.43 sep=0.95".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 265.4286 dec= 0.7482 mag=18.03 sep=0.22". The closest Genie
source has ra= 265.4286 dec= 0.7482 mag=18.03 sep=0.22".
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 869 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 17:41:42.86 = 265.42859
DEC(J2000) = +00:44:53.4 = 0.74817
with a 90%-confidence error radius of about 0.63 arc sec. This position is 0.22
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.03 with a 1-sigma error of about 0.15. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.28.
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?
542869935 869 WHITE srclist found no candidates.
542869935 869 WHITE image found no candidates.
List afterglow candidates for other finding charts.
542869170 104 WHITE srclist found no candidates.
542869170 104 WHITE image found no candidates.
542869382 316 U srclist found no candidates.
542869382 316 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 0.74814
GRB_ERROR: 5
GRB_RA: 265.42854
IMAGE_START_TIME: 05:12:10
MAGNITUDE: 17.9
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT