image overlap message for exposure 3 of trigger 889785
uvot_overlap.pl vrs. 2010-12-20b fem started at 190220d15h15m53s590121usUT
The observation of trigger 889785 started 2019-02-20T03:14:33.8
Examining file ./889785_g898_uvot_sky_image.fits
The exposure ID is 572325273
The exposure time is 33.418 (seconds)
The filter is WHITE.
The uvot region is centered at (330.1797,-76.6798) with a roll angle of 3.3
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 (330.1420,-76.6910) with a radius of 3.000 arc min
This is 0.851 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 (330.1637,-76.6813) with a radius of 0.025 arc min
This is 0.237 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
image afterglow message for exposure 3 of trigger 889785
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190220d15h16m28s050668usUT
Observation start time is 2019-02-20T03:14:33.8
Examining file ./889785_g898_uvot_catalog_image.fits
The exposure ID is 572325273
The exposure is 33.418 sec.
The bin size is 2 pixels
The filter is WHITE
There are 6 detected source(s) for 889785_g898
Aspect correction adds -0.00106 degrees (-0.255 sec of time = -0.88 arc sec) to RA
Aspect correction adds -0.00071 degrees (-2.56 arcsec) to Dec
Total aspect correction is 2.71 arcsec
Star catalogs centered at 330.1812 , -76.6810 with radius 2.29 arc min.
n_usno: 58 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 6 matched entries is 0.364" for 889785_g898
Mean and std. dev of mag. difference (MAG_DELTA) are 0.733 and 0.288 for 889785_g898
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 889785_g898.
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.
Magnitude criteria will be applied later.
BAT distances are from RA=330.1420 (22:00:34.08) DEC=-76.6910 (-76:41:27.6)
XRT distances are from RA=330.1637 (22:00:39.30) DEC=-76.6813 (-76:40:52.5)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 10763.833 counts in the bkg source region of 6025.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 1.787 counts/pixel (5-sig UL in 4" is 19.41 mag) for 889785_g898
There are 384.80667 counts in the xrt source region of 197.00000 pixels.
Rate in xrt region with 8 arcsec radius is 1.953 counts/pixel for 889785_g898
There are 1980.2551 counts in the xrt_bkg source region of 1064.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 1.861 counts/pixel (5-sig UL in 4" is 19.38 mag) for 889785_g898
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 19.96, 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: 889785_572325273_190220d15h16m28s050668usUT_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(330.1797,-76.6798,45")
fk5;-circle(330.172790710366,-76.6853397738361,6")
fk5;-circle(330.166020771395,-76.6757496171498,6")
fk5;-circle(330.147028828519,-76.6897764498397,6")
Region file: 889785_572325273_190220d15h16m28s050668usUT_xrt.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(330.16375,-76.68125,8")
Region file: 889785_572325273_190220d15h16m28s050668usUT_xrt_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(330.16375,-76.68125,25")
fk5;-circle(330.16375,-76.68125,15")
fk5;-circle(330.172790710366,-76.6853397738361,6")
fk5;-circle(330.166020771395,-76.6757496171498,6")
image paragraph message for exposure 3 of trigger 889785
------ Start for Possible Stand-alone Circular ----
In response to GRB190220 (Swift/BAT trigger 889785) at 02:59:34 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 33 seconds with the White filter
starting 876 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 19.6 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 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.13.
------- notes for trigger 889785 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190220d15h16m36s149568usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=889785
-expid=572325273 -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/889785/
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 572325273.81368 or about 2019:051:03:14:28 UT
Found 921 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 8% of the srclist region. Found 86 sources in
srclist catalog. Found 4 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.40 mag.
Found 6 source(s) in Genie image catalog. Found 0 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 19.96 mag. Found 54 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 7% of the
Genie image region.
Genie image analysis:
Found 10763.8 counts in the large background region of 6025.0 pixels or a rate
of 1.787 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 19.39 mag. for a
4-arcsec aperture.
Found 384.8 counts in the XRT position region of 197.0 pixels or a rate of
1.953 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.550 +/- 0.645 (1-sigma) cps or
20.43 mag and a range from 19.59 to 99.99 mag. The 3-sigma UL at the XRT
position is 2.484 cps or 18.79 mag. The closest srclist source has ra= 330.1471
dec= -76.6900 mag=17.67 sep=34.26". The closest Genie source has ra= 330.1728
dec= -76.6853 mag=19.38 sep=16.52".
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?
572325273 875 WHITE srclist found no candidates.
572325273 875 WHITE image found no candidates.
List afterglow candidates for other finding charts.
572324483 85 WHITE 330.16312 -76.68093 19.62/19.2 1.2 srclist Yes
572324483 85 WHITE 330.16309 -76.68067 19.29/20.5 2.1 image Yes
572324695 297 U srclist found no candidates.
572324695 297 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -76.68125
GRB_ERROR: 5
GRB_RA: 330.16375
IMAGE_START_TIME: 03:14:28
MAGNITUDE: 18.8
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT