image overlap message for exposure 2 of trigger 915381
uvot_overlap.pl vrs. 2010-12-20b fem started at 190720d15h24m36s958037usUT
The observation of trigger 915381 started 2019-07-19T15:03:40.6
Examining file ./915381_g305_uvot_sky_image.fits
The exposure ID is 585241420
The exposure time is 249.924 (seconds)
The filter is U.
The uvot region is centered at (240.2009,12.9996) with a roll angle of 299.8
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 (240.2100,12.9770) with a radius of 3.000 arc min
This is 1.457 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 7.12 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (240.2069,13.0000) with a radius of 0.060 arc min
This is 0.351 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 2 of trigger 915381
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190720d15h25m03s200929usUT
Observation start time is 2019-07-19T15:03:40.6
Examining file ./915381_g305_uvot_catalog_image.fits
The exposure ID is 585241420
The exposure is 249.924 sec.
The bin size is 2 pixels
The filter is U
There are 2 detected source(s) for 915381_g305
Aspect correction adds -0.00045 degrees (-0.107 sec of time = -1.57 arc sec) to RA
Aspect correction adds 0.00135 degrees ( 4.87 arcsec) to Dec
Total aspect correction is 5.12 arcsec
Star catalogs centered at 240.1984 , 13.0029 with radius 2.23 arc min.
n_usno: 49 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 2 matched entries is 0.267" for 915381_g305
Mean and std. dev of mag. difference (MAG_DELTA) are 0.745 and 0.199 for 915381_g305
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 915381_g305.
Acceptable entries have no ID, XRT distances < 9", 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=240.2100 (16:00:50.40) DEC=12.9770 (+12:58:37.2)
XRT distances are from RA=240.2069 (16:00:49.65) DEC=13.0000 (+13:00:00.0)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 11815.103 counts in the bkg source region of 6196.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 1.907 counts/pixel (5-sig UL in 4" is 20.11 mag) for 915381_g305
There are 343.12939 counts in the xrt source region of 197.00000 pixels.
Rate in xrt region with 8 arcsec radius is 1.742 counts/pixel for 915381_g305
There are 2245.9180 counts in the xrt_bkg source region of 1148.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 1.956 counts/pixel (5-sig UL in 4" is 20.10 mag) for 915381_g305
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 20.67, XRT distances < 9",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 915381_585241420_190720d15h25m03s200929usUT_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(240.2009,12.9996,45")
fk5;-circle(240.201433989578,12.9976151071,6")
Region file: 915381_585241420_190720d15h25m03s200929usUT_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(240.20687,13.00000,8")
Region file: 915381_585241420_190720d15h25m03s200929usUT_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(240.20687,13.00000,25")
fk5;-circle(240.20687,13.00000,15")
fk5;-circle(240.201433989578,12.9976151071,6")
image paragraph message for exposure 2 of trigger 915381
------ Start for Possible Stand-alone Circular ----
In response to GRB190719 (Swift/BAT trigger 915381) at 14:58:34 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
282 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 19.2 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 18.0 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.04.
------- notes for trigger 915381 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190720d15h25m07s331288usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=915381
-expid=585241420 -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/915381/
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 585241420.58042 or about 2019:200:15:03:35 UT
Found 341 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 23 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
18.12 mag.
Found 2 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 20.67 mag. Found 45 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 6% of the
Genie image region.
Genie image analysis:
Found 11815.1 counts in the large background region of 6196.0 pixels or a rate
of 1.907 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 20.15 mag. for a
4-arcsec aperture.
Found 343.1 counts in the XRT position region of 197.0 pixels or a rate of
1.742 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.169 +/- 0.081 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.243 cps or 19.92 mag. The closest srclist
source has ra= 240.2174 dec= 13.0188 mag=19.18 sep=77.21". The closest Genie
source has ra= 240.2014 dec= 12.9976 mag=19.69 sep=20.91".
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?
585241420 282 U srclist found no candidates.
585241420 282 U image found no candidates.
List afterglow candidates for other finding charts.
585241208 70 WHITE srclist found no candidates.
585241208 70 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 13.00000
GRB_ERROR: 9
GRB_RA: 240.20687
IMAGE_START_TIME: 15:03:35
MAGNITUDE: 19.9
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT