srclist overlap message for exposure 2 of trigger 814677
uvot_overlap.pl vrs. 2010-12-20b fem started at 180316d14h30m57s512777usUT
The observation of trigger 814677 started 2018-03-16T05:03:02.4
Examining file ./814677_g336_uvot_sky_srclist.fits
The exposure ID is 542869382
The exposure time is undefined.
The filter is U.
The uvot region is centered at (265.4322,0.7492) with a roll angle of 91.8
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 (265.4360,0.7370) with a radius of 3.000 arc min
This is 0.766 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 (265.4285,0.7481) with a radius of 0.023 arc min
This is 0.230 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
srclist afterglow message for exposure 2 of trigger 814677
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180316d14h31m20s551233usUT
Observation start time is 2018-03-16T05:03:02.4
Examining file ./814677_g336_uvot_catalog_srclist.fits
The exposure ID is 542869382
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 74 detected source(s) for 814677_g336
Aspect correction adds -0.00072 degrees (-0.174 sec of time = -2.61 arc sec) to RA
Aspect correction adds -0.00103 degrees (-3.71 arcsec) to Dec
Total aspect correction is 4.53 arcsec
Star catalogs centered at 265.4285 , 0.7509 with radius 6.32 arc min.
n_usno: 1369 n_gsc: 1589
*** WARNING -- bright star catalog has 2 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
bright star 1: 265.51166 (17:42:02.80) 0.79442 (+00:47:39.9) 11.77 GSC-F
Mean distance difference (CAT_DELTA) for 70 matched entries is 0.681" for 814677_g336
Mean and std. dev of mag. difference (MAG_DELTA) are 1.539 and 0.902 for 814677_g336
Found 5 entries without IDs and 3 entries that are acceptable afterglow candidates for 814677_g336.
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.
1 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_g336 with 5x5 stamp
ra=265.42851 (17:41:42.84) dec=0.74817 (+00:44:53.4) +/- 1.1" mag=16.77+/-0.35
dist=0.1 REFID=16
src: 0 distr. of nearby unmatched sources: 0 0 0 0 1
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
265.4284 0.7491 3.5 -1 USNO-B1 21.05 19.97 20.45 *
265.4293 0.7532 18.4 -1 USNO-B1 19.22 17.90 18.49
265.4290 0.7534 19.0 -1 USNO-B1 19.51 18.45 18.92
265.4253 0.7466 13.0 -1 USNO-B1 15.70 14.29 14.91
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
265.4252 0.7466 13.2 -1 GSC2.3 13.97 15.50 99.99
265.4261 0.7460 11.7 -1 GSC2.3 99.99 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 3 in the list of sources is a candidate afterglow for 814677_g336 with 3x3 stamp
ra=265.42348 (17:41:41.63) dec=0.75248 (+00:45:08.9) +/- 1.1" mag=19.23+/-0.35
dist=24.0 REFID=74
*** The position of this source is inconsistent with the XRT position.
The position is 71.7 arc sec from the BAT position.
src: 3 distr. of nearby unmatched sources: 0 0 0 0 1
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
265.4234 0.7531 2.3 -1 USNO-B1 20.76 18.63 19.58 *
265.4230 0.7564 14.2 -1 USNO-B1 20.72 19.50 20.04
265.4288 0.7534 19.6 -1 GSC2.3 19.06 99.99 99.99
265.4235 0.7531 2.1 -1 GSC2.3 18.72 20.77 99.99 *
265.4230 0.7564 14.3 -1 GSC2.3 19.52 21.02 99.99
265.4213 0.7552 12.5 -1 GSC2.3 19.79 21.56 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 26 in the list of sources is a candidate afterglow for 814677_g336 with 3x3 stamp
ra=265.43008 (17:41:43.22) dec=0.71130 (+00:42:40.7) +/- 1.1" mag=18.75+/-0.35
dist=132.8 REFID=54
*** The position of this source is inconsistent with the XRT position.
The position is 95.0 arc sec from the BAT position.
src: 26 srclist_match has ID
src: 26 distr. of nearby unmatched sources: 0 0 0 0 0
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
265.4270 0.7157 19.2 -1 USNO-B1 99.99 19.18 99.99
265.4262 0.7112 14.0 -1 USNO-B1 21.02 19.11 19.96
265.4304 0.7110 1.8 -1 USNO-B1 18.38 16.71 17.45 *
265.4278 0.7104 9.0 -1 USNO-B1 19.94 18.91 19.37
265.4272 0.7155 18.4 -1 GSC2.3 19.45 99.99 99.99
265.4262 0.7112 13.9 -1 GSC2.3 19.09 21.23 99.99
265.4305 0.7109 2.0 -1 GSC2.3 15.32 17.00 99.99 *
265.4278 0.7103 9.1 -1 GSC2.3 18.94 20.05 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 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=265.42851 (17:41:42.84) dec=0.74817 (+00:44:53.4) +/- 1.1" mag=16.77+/-0.35 dist=0.1 REFID=16
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 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 814677
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 250 seconds with the U filter starting
316 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
0.28.
------- notes for trigger 814677 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180316d14h31m26s495000usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=814677
-expid=542869382 -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/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 542869382.40074 or about 2018:075:05:02:57 UT
Found 1589 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 27% of the srclist region. Found 74 sources in
srclist catalog. Found 5 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 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
20.05 mag. Found 272 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 33964.9 counts in the large background region of 5655.0 pixels or a rate
of 6.006 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 19.53 mag. for a
4-arcsec aperture.
Found 2397.8 counts in the XRT position region of 201.0 pixels or a rate of
11.929 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 4.694 +/- 0.205 (1-sigma) cps or
16.70 mag and a range from 16.65 to 16.75 mag. The 3-sigma UL at the XRT
position is 5.309 cps or 16.57 mag.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 265.4285 dec= 0.7482 mag=16.77 sep=0.15".
The closest srclist source has ra= 265.4285 dec= 0.7482 mag=16.77 sep=0.15".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 265.4286 dec= 0.7482 mag=16.41 sep=0.34". The closest Genie
source has ra= 265.4286 dec= 0.7482 mag=16.41 sep=0.34".
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
316 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 17:41:42.87 = 265.42862
DEC(J2000) = +00:44:53.5 = 0.74819
with a 90%-confidence error radius of about 0.62 arc sec. This position is 0.34
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.41 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.28.
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?
542869382 316 U srclist found no candidates.
542869382 316 U 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.
542869935 869 WHITE srclist found no candidates.
542869935 869 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 0.74814
GRB_ERROR: 5
GRB_RA: 265.42854
IMAGE_START_TIME: 05:02:57
MAGNITUDE: 16.6
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT