image overlap message for exposure 2 of trigger 926515
uvot_overlap.pl vrs. 2010-12-20b fem started at 190926d19h45m23s713127usUT
The observation of trigger 926515 started 2019-09-26T09:57:42.8
Examining file ./926515_g325_uvot_sky_image.fits
The exposure ID is 591184662
The exposure time is 249.924 (seconds)
The filter is U.
The uvot region is centered at (100.5789,59.5289) with a roll angle of 97.4
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 (100.5990,59.5110) with a radius of 3.000 arc min
This is 1.234 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 7.16 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (100.5704,59.5292) with a radius of 0.033 arc min
This is 0.258 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 0.003 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 926515
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190926d19h45m32s861559usUT
Observation start time is 2019-09-26T09:57:42.8
Examining file ./926515_g325_uvot_catalog_image.fits
The exposure ID is 591184662
The exposure is 249.924 sec.
The bin size is 2 pixels
The filter is U
There are 9 detected source(s) for 926515_g325
Aspect correction adds 0.00208 degrees (0.498 sec of time = 3.79 arc sec) to RA
Aspect correction adds -0.00068 degrees (-2.45 arcsec) to Dec
Total aspect correction is 4.52 arcsec
Star catalogs centered at 100.5714 , 59.5255 with radius 2.47 arc min.
n_usno: 83 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 9 matched entries is 0.346" for 926515_g325
Mean and std. dev of mag. difference (MAG_DELTA) are 1.018 and 0.628 for 926515_g325
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 926515_g325.
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=100.5990 (06:42:23.76) DEC=59.5110 (+59:30:39.6)
XRT distances are from RA=100.5704 (06:42:16.90) DEC=59.5292 (+59:31:45.1)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 51401.340 counts in the bkg source region of 6086.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 8.446 counts/pixel (5-sig UL in 4" is 19.31 mag) for 926515_g325
There are 1723.7540 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 8.619 counts/pixel for 926515_g325
There are 9979.2949 counts in the xrt_bkg source region of 1177.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 8.479 counts/pixel (5-sig UL in 4" is 19.30 mag) for 926515_g325
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 19.86, 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: 926515_591184662_190926d19h45m32s861559usUT_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(100.5789,59.5289,45")
fk5;-circle(100.561835338802,59.5298783184295,6")
fk5;-circle(100.593557624474,59.536429027542,6")
fk5;-circle(100.606476834093,59.52901073564,6")
Region file: 926515_591184662_190926d19h45m32s861559usUT_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(100.57042,59.52919,8")
Region file: 926515_591184662_190926d19h45m32s861559usUT_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(100.57042,59.52919,25")
fk5;-circle(100.57042,59.52919,15")
fk5;-circle(100.561835338802,59.5298783184295,6")
image paragraph message for exposure 2 of trigger 926515
------ Start for Possible Stand-alone Circular ----
In response to GRB190926 (Swift/BAT trigger 926515) at 09:52:16 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
302 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
0.06.
------- notes for trigger 926515 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190926d19h45m36s245299usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=926515
-expid=591184662 -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/926515/
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 591184662.80858 or about 2019:269:09:57:37 UT
Found 484 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 9% of the srclist region. Found 37 sources in
srclist catalog. Found 2 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 9 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 19.86 mag. Found 79 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 8% of the
Genie image region.
Genie image analysis:
Found 51401.3 counts in the large background region of 6086.0 pixels or a rate
of 8.446 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 19.35 mag. for a
4-arcsec aperture.
Found 1723.8 counts in the XRT position region of 200.0 pixels or a rate of
8.619 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.112 +/- 0.179 (1-sigma) cps or
20.75 mag and a range from 19.72 to 99.99 mag. The 3-sigma UL at the XRT
position is 0.651 cps or 18.85 mag. The closest srclist source has ra= 100.5621
dec= 59.5299 mag=16.69 sep=15.38". The closest Genie source has ra= 100.5618
dec= 59.5299 mag=16.15 sep=15.87".
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?
591184662 302 U srclist found no candidates.
591184662 302 U image found no candidates.
List afterglow candidates for other finding charts.
591184504 144 WHITE srclist found no candidates.
591184504 144 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 59.52919
GRB_ERROR: 5
GRB_RA: 100.57042
IMAGE_START_TIME: 09:57:37
MAGNITUDE: 18.9
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT