srclist overlap message for exposure 1 of trigger 843211
uvot_overlap.pl vrs. 2010-12-20b fem started at 180621d01h17m28s997018usUT
The observation of trigger 843211 started 2018-06-20T15:52:30.2
Examining file ./843211_g112_uvot_sky_srclist.fits
The exposure ID is 551202750
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (357.5263,-57.9534) with a roll angle of 78.4
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 (357.5170,-57.9570) with a radius of 3.000 arc min
This is 0.368 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 (357.5212,-57.9624) with a radius of 0.023 arc min
This is 0.566 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 1 of trigger 843211
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180621d01h17m33s617023usUT
Observation start time is 2018-06-20T15:52:30.2
Examining file ./843211_g112_uvot_catalog_srclist.fits
The exposure ID is 551202750
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 25 detected source(s) for 843211_g112
Aspect correction adds -0.00045 degrees (-0.108 sec of time = -0.86 arc sec) to RA
Aspect correction adds 0.00004 degrees ( 0.14 arcsec) to Dec
Total aspect correction is 0.87 arcsec
Star catalogs centered at 357.5305 , -57.9541 with radius 6.01 arc min.
n_usno: 273 n_gsc: 288
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.932
RA DEC Mag Color
bright star 0: 357.49915 (23:49:59.79) -57.99294 (-57:59:34.6) 11.93 GSC-F
Mean distance difference (CAT_DELTA) for 22 matched entries is 0.729" for 843211_g112
Mean and std. dev of mag. difference (MAG_DELTA) are 1.446 and 0.764 for 843211_g112
Found 3 entries without IDs and 2 entries that are acceptable afterglow candidates for 843211_g112.
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=357.5170 (23:50:04.08) DEC=-57.9570 (-57:57:25.2)
XRT distances are from RA=357.5212 (23:50:05.09) DEC=-57.9624 (-57:57:44.8)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 843211_g112 with 5x5 stamp
ra=357.52114 (23:50:05.07) dec=-57.96218 (-57:57:43.8) +/- 1.1" mag=18.31+/-0.35
dist=1.0 REFID=10
src: 0 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
357.5215 -57.9663 14.7 -1 USNO-B1 99.99 24.07 99.99
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
-----------------
Entry 18 in the list of sources is a candidate afterglow for 843211_g112 with 5x5 stamp
ra=357.44600 (23:49:47.04) dec=-57.92194 (-57:55:19.0) +/- 1.1" mag=20.57+/-0.35
dist=204.8 REFID=25
*** The position of this source is inconsistent with the XRT position.
The position is 185.3 arc sec from the BAT position.
src: 18 distr. of nearby unmatched sources: 0 0 0 0 0
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=357.52114 (23:50:05.07) dec=-57.96218 (-57:57:43.8) +/- 1.1" mag=18.31+/-0.35 dist=1.0 REFID=10
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.22, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
srclist paragraph message for exposure 1 of trigger 843211
------ Start for Possible Stand-alone Circular ----
In response to GRB180620 (Swift/BAT trigger 843211) at 15:50:37 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 91 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 23:50:05.10 = 357.52126
DEC(J2000) = -57:57:44.1 = -57.96224
with a 90%-confidence error radius of about 0.75 arc sec. This position is 0.7
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.98 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.01.
------- notes for trigger 843211 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180621d01h17m41s947296usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=843211
-expid=551202750 -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/843211/
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 551202750.19008 or about 2018:171:15:52:25 UT
Found 287 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 25 sources in
srclist catalog. Found 3 srclist source(s) without IDs. There are 1 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
Found 7 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 1 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.72 mag. Found 58 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 6% of the Genie image region.
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?
551202750 91 WHITE 357.52114 -57.96218 18.31/19.2 1.0 srclist Yes
551202750 91 WHITE 357.52126 -57.96224 17.98/20.7 0.7 image Yes
List afterglow candidates for other finding charts.
551202962 303 U 357.52114 -57.96212 17.60/18.1 2.3 srclist Yes
551202962 303 U 357.52122 -57.96215 17.28/20.1 2.2 image Yes
551203515 856 WHITE 357.52136 -57.96189 18.22/19.2 3.1 srclist Yes
551203515 856 WHITE 357.52120 -57.96208 17.78/20.0 2.6 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -57.96224
GRB_ERROR: 0.75
GRB_RA: 357.52126
IMAGE_START_TIME: 15:52:25
MAGNITUDE: 17.98
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT