image overlap message for exposure 1 of trigger 843122
uvot_overlap.pl vrs. 2010-12-20b fem started at 180620d10h44m55s123367usUT
The observation of trigger 843122 started 2018-06-20T08:39:49.5
Examining file ./843122_g290_uvot_sky_image.fits
The exposure ID is 551176789
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (279.8854,23.2677) with a roll angle of 13.6
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 (279.8830,23.2650) with a radius of 3.000 arc min
This is 0.206 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 (279.8965,23.2442) with a radius of 0.030 arc min
This is 1.537 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 0.000 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 843122
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180620d10h45m00s838113usUT
Observation start time is 2018-06-20T08:39:49.5
Examining file ./843122_g290_uvot_catalog_image.fits
The exposure ID is 551176789
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 38 detected source(s) for 843122_g290
Aspect correction adds 0.00029 degrees (0.070 sec of time = 0.97 arc sec) to RA
Aspect correction adds 0.00057 degrees ( 2.05 arcsec) to Dec
Total aspect correction is 2.27 arcsec
Star catalogs centered at 279.8868 , 23.2654 with radius 2.72 arc min.
n_usno: 301 n_gsc: 318
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 11.04936
RA DEC Mag Color
bright star 0: 279.86621 (18:39:27.89) 23.27623 (+23:16:34.4) 11.05 USNO-V
bright star 1: 279.91078 (18:39:38.59) 23.24268 (+23:14:33.6) 11.71 USNO-V
Mean distance difference (CAT_DELTA) for 36 matched entries is 0.375" for 843122_g290
Mean and std. dev of mag. difference (MAG_DELTA) are 0.706 and 0.801 for 843122_g290
Found 2 entries without IDs and 0 entries that are acceptable afterglow candidates for 843122_g290.
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.
2 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=279.8830 (18:39:31.92) DEC=23.2650 (+23:15:54.0)
XRT distances are from RA=279.8965 (18:39:35.15) DEC=23.2442 (+23:14:39.0)
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 11:
ra=279.86972 dec= 23.27277 +/- 0.6" mag=16.16+/-0.14 dist=135.7 REFID=8 flag=3
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
279.8989 23.2436 8.2 -1 USNO-B1 19.27 18.34 18.75
279.8989 23.2436 8.4 -1 GSC2.3 18.22 19.29 18.25
The closest star is 8.20" away.
List UVOT sources within 10" of the XRT position:
There are 55833.055 counts in the bkg source region of 5431.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 10.280 counts/pixel (5-sig UL in 4" is 20.08 mag) for 843122_g290
Do not compute counts in XRT region because position is too far from center.
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 20.64, 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: 843122_551176789_180620d10h45m00s838113usUT_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(279.8854,23.2677,45")
fk5;-circle(279.882136428138,23.2696583554889,6")
fk5;-circle(279.88668950942,23.2694003474666,6")
fk5;-circle(279.888245858277,23.2620062326476,6")
fk5;-circle(279.875759860396,23.25909705034,6")
fk5;-circle(279.885249092333,23.2549470632377,6")
fk5;-circle(279.886040503198,23.2756208159972,6")
fk5;-circle(279.892802355775,23.2720956517235,6")
fk5;-circle(279.870135447445,23.2674069985723,6")
fk5;-circle(279.892303257432,23.2744422552165,6")
fk5;-circle(279.896821183013,23.2689560500493,6")
fk5;-circle(279.899630712352,23.2677620963636,6")
image paragraph message for exposure 1 of trigger 843122
------ Start for Possible Stand-alone Circular ----
In response to GRB180620 (Swift/BAT trigger 843122) at 08:34:58 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 270 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 18:39:35.08 = 279.89618
DEC(J2000) = +23:14:39.7 = 23.24437
with a 90%-confidence error radius of about 1.10 arc sec. This position is 1.2
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.24. No correction has been made for the expected extinction corresponding to
E(B-V) of 0.13.
------- notes for trigger 843122 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180620d10h45m03s467330usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=843122
-expid=551176789 -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/843122/
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 551176789.455 or about 2018:171:08:39:44 UT
Found 1563 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 29% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 5 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 38 source(s) in Genie image catalog. 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 20.64 mag. Found 309 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
29% of the Genie image region. The closest Genie source has ra= 279.8923 dec=
23.2442 mag=17.75 sep=13.88".
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?
551176789 269 WHITE 279.89618 23.24437 18.24/19.2 1.2 srclist Yes
551176789 269 WHITE image found no candidates.
List afterglow candidates for other finding charts.
551177391 871 WHITE srclist found no candidates.
551177391 871 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 23.24437
GRB_ERROR: 1.10
GRB_RA: 279.89618
IMAGE_START_TIME: 08:39:44
MAGNITUDE: 18.24
MAG_ERROR: 0.4
MESSAGE_TYPE: ACK
SOURCE: XRT