image overlap message for exposure 1 of trigger 893808
uvot_overlap.pl vrs. 2010-12-20b fem started at 190320d07h54m43s012191usUT
The observation of trigger 893808 started 2019-03-20T02:02:13.4
Examining file ./893808_g2856_uvot_sky_image.fits
The exposure ID is 574740133
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (117.8079,-45.8943) with a roll angle of 248.4
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 (117.8110,-45.8900) with a radius of 3.000 arc min
This is 0.291 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 (117.8481,-45.8879) with a radius of 0.075 arc min
This is 1.725 arc min from the center of the uvot region
The area of the XRT error circle is 0.018 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 893808
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190320d07h54m48s342698usUT
Observation start time is 2019-03-20T02:02:13.4
Examining file ./893808_g2856_uvot_catalog_image.fits
The exposure ID is 574740133
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 36 detected source(s) for 893808_g2856
Aspect correction adds -0.00102 degrees (-0.244 sec of time = -2.54 arc sec) to RA
Aspect correction adds 0.00021 degrees ( 0.75 arcsec) to Dec
Total aspect correction is 2.65 arcsec
Star catalogs centered at 117.8073 , -45.8927 with radius 2.66 arc min.
n_usno: 282 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 35 matched entries is 0.426" for 893808_g2856
Mean and std. dev of mag. difference (MAG_DELTA) are 1.031 and 0.532 for 893808_g2856
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 893808_g2856.
Acceptable entries have no ID, XRT distances < 11.25", 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=117.8110 (07:51:14.64) DEC=-45.8900 (-45:53:24.0)
XRT distances are from RA=117.8481 (07:51:23.55) DEC=-45.8879 (-45:53:16.3)
-----------------
Entry 19 in the list of sources is a candidate afterglow for 893808_g2856 with genie
ra=117.78912 (07:51:09.39) dec=-45.89719 (-45:53:49.9) +/- 0.6" mag=16.49+/-0.14
dist=151.6 REFID=19 major=0.9 minor=0.9 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 60.6 arc sec from the BAT position.
Found 6 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
117.7909 -45.8958 6.7 -1 USNO-B1 19.16 16.77 17.83
117.7901 -45.8934 13.8 -1 USNO-B1 20.59 19.47 19.97
117.7894 -45.8969 1.3 -1 USNO-B1 16.41 15.05 15.66 *
117.7905 -45.9014 15.6 -1 USNO-B1 19.70 18.61 19.09
117.7852 -45.8925 19.6 -1 USNO-B1 20.85 19.82 20.28
117.7858 -45.8993 11.3 -1 USNO-B1 16.78 15.50 16.07
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 1 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
117.8514 -45.8892 9.6 -1 USNO-B1 18.09 17.68 17.86
The closest star is 9.57" away.
List UVOT sources within 10" of the XRT position:
There are 1.0070202E+05 counts in the bkg source region of 5266.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 19.123 counts/pixel (5-sig UL in 4" is 19.75 mag) for 893808_g2856
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 20.30, XRT distances < 11.25",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 893808_574740133_190320d07h54m48s342698usUT_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(117.8079,-45.8943,45")
fk5;-circle(117.816671207616,-45.894083134042,6")
fk5;-circle(117.813250394192,-45.8956025936513,6")
fk5;-circle(117.813912419729,-45.8825453571068,6")
fk5;-circle(117.803303709521,-45.8815690564187,6")
fk5;-circle(117.806135663715,-45.9005202645774,6")
fk5;-circle(117.795936965242,-45.8849567740984,6")
fk5;-circle(117.798242332797,-45.8976919100458,6")
fk5;-circle(117.794373689046,-45.8871946570744,6")
fk5;-circle(117.819569329833,-45.9008765637138,6")
fk5;-circle(117.807618807224,-45.9025480310394,6")
fk5;-circle(117.796698654141,-45.9000686334929,6")
fk5;-circle(117.811470793772,-45.9058098442279,6")
fk5;-circle(117.789120323555,-45.8971896618681,6")
image paragraph message for exposure 1 of trigger 893808
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no overlap
SRCLIST PROBLEM: srclist filled telemetry buffer
See notes for more details.
------ Start for Possible Stand-alone Circular ----
In response to GRB190320 (Swift/BAT trigger 893808) at 01:14:36 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 2834 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
none of the XRT error circle. 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 0.23.
------- notes for trigger 893808 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190320d07h54m51s817764usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=893808
-expid=574740133 -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/893808/
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 574740133.41028 or about 2019:079:02:02:08 UT
Found 1615 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 28% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 6 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 36 source(s) in Genie image catalog. Found 1 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.30 mag. Found 278 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 100702.0 counts in the large background region of 5266.0 pixels or a rate
of 19.123 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 19.75 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 19.09 mag. The closest srclist
source has ra= 117.8524 dec= -45.8848 mag=17.63 sep=15.35". The closest Genie
source has ra= 117.8340 dec= -45.8930 mag=19.05 sep=40.01".
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?
574740133 2833 WHITE srclist found no candidates.
574740133 2833 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------