image overlap message for exposure 1 of trigger 966554
uvot_overlap.pl vrs. 2010-12-20b fem started at 200416d15h08m19s604824usUT
The observation of trigger 966554 started 2020-04-16T07:07:24.2
Examining file ./966554_g126_uvot_sky_image.fits
The exposure ID is 608713644
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (335.6953,-7.5256) with a roll angle of 70.6
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 (335.6910,-7.5300) with a radius of 3.000 arc min
This is 0.371 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 (335.6986,-7.5179) with a radius of 0.058 arc min
This is 0.501 arc min from the center of the uvot region
The area of the XRT error circle is 0.011 sq. arc min
The UVOT/XRT overlap is 0.011 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 966554
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200416d15h08m26s389873usUT
Observation start time is 2020-04-16T07:07:24.2
Examining file ./966554_g126_uvot_catalog_image.fits
The exposure ID is 608713644
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 2 detected source(s) for 966554_g126
Aspect correction adds 0.00149 degrees (0.357 sec of time = 5.31 arc sec) to RA
Aspect correction adds 0.00029 degrees ( 1.05 arcsec) to Dec
Total aspect correction is 5.41 arcsec
Star catalogs centered at 335.6913 , -7.5286 with radius 2.14 arc min.
n_usno: 37 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 1 matched entries is 0.300" for 966554_g126
Mean and std. dev of mag. difference (MAG_DELTA) are 1.541 and 0.000 for 966554_g126
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 966554_g126.
Acceptable entries have no ID, XRT distances < 8.75", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
Magnitude criteria will be applied later.
BAT distances are from RA=335.6910 (22:22:45.84) DEC=-7.5300 (-07:31:48.0)
XRT distances are from RA=335.6986 (22:22:47.66) DEC=-7.5179 (-07:31:04.3)
*** WARNING 50 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 966554_g126 with genie
ra=335.69929 (22:22:47.83) dec=-7.51831 (-07:31:05.9) +/- 0.7" mag=16.47+/-0.14
dist=3.0 REFID=2 major=1.0 minor=1.0 flag=0
Found 0 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)
uvot_check_outside found 10 of 10 good pixels
##### This source remains a candidate #####
It has no entries within 3.5" or brighter than 12 mag
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=335.69929 (22:22:47.83) dec=-7.51831 (-07:31:05.9) +/- 0.7" mag=16.47+/-0.14 dist=3.0 REFID=2 flag=0
There are 2.1521458E+05 counts in the bkg source region of 6197.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 34.729 counts/pixel (5-sig UL in 4" is 19.42 mag) for 966554_g126
There are 4223.8936 counts in the src source region of 46.000000 pixels.
Rate in src region with 4 arcsec radius is 91.824 counts/pixel for 966554_g126
There are 43175.672 counts in the cand_src_bkg source region of 1241.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 34.791 counts/pixel (5-sig UL in 4" is 19.42 mag) for 966554_g126
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 19.98, XRT distances < 8.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
Region file: 966554_608713644_200416d15h08m26s389873usUT_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(335.6953,-7.5256,45")
fk5;-circle(335.699294926959,-7.51830611950227,6")
Region file: 966554_608713644_200416d15h08m26s389873usUT_cand_src.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(335.699294926959,-7.51830611950227,4")
Region file: 966554_608713644_200416d15h08m26s389873usUT_cand_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(335.699294926959,-7.51830611950227,25")
fk5;-circle(335.699294926959,-7.51830611950227,15")
image paragraph message for exposure 1 of trigger 966554
------ Start for Possible Stand-alone Circular ----
In response to GRB200416 (Swift/BAT trigger 966554) at 07:05:17 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 102 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 22:22:47.83 = 335.69929
DEC(J2000) = -07:31:05.9 = -7.51831
with a 90%-confidence error radius of about 0.75 arc sec. This position is 3.0
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.47 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.06.
------- notes for trigger 966554 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200416d15h08m31s189980usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=966554
-expid=608713644 -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/966554/
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 608713644.15802 or about 2020:107:07:07:19 UT
Found 328 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 21 sources in
srclist catalog. Found 2 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 2 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
19.98 mag. Found 33 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 5% 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?
608713644 102 WHITE 335.69933 -7.51822 17.19/19.2 3.0 srclist Yes
608713644 102 WHITE 335.69929 -7.51831 16.47/20.0 3.0 image Yes
List afterglow candidates for other finding charts.
608713856 314 U 335.69933 -7.51833 16.74/18.1 1.2 srclist Yes
608713856 314 U 335.69929 -7.51834 16.39/19.5 1.1 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -7.51831
GRB_ERROR: 0.75
GRB_RA: 335.69929
IMAGE_START_TIME: 07:07:19
MAGNITUDE: 16.47
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT