image overlap message for exposure 2 of trigger 928924
uvot_overlap.pl vrs. 2010-12-20b fem started at 191011d10h28m16s968713usUT
The observation of trigger 928924 started 2019-10-11T04:41:09.8
Examining file ./928924_g312_uvot_sky_image.fits
The exposure ID is 592461669
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (44.7299,-27.8460) with a roll angle of 137.3
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 (44.7240,-27.8450) with a radius of 3.000 arc min
This is 0.317 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 (44.7280,-27.8454) with a radius of 0.025 arc min
This is 0.105 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 2 of trigger 928924
find_uvot_ag.pl vrs. 2017-02-17 fem started at 191011d10h28m29s181585usUT
Observation start time is 2019-10-11T04:41:09.8
Examining file ./928924_g312_uvot_catalog_image.fits
The exposure ID is 592461669
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 2 detected source(s) for 928924_g312
Aspect correction adds 0.00144 degrees (0.345 sec of time = 4.58 arc sec) to RA
Aspect correction adds -0.00024 degrees (-0.87 arcsec) to Dec
Total aspect correction is 4.66 arcsec
Star catalogs centered at 44.7197 , -27.8394 with radius 2.22 arc min.
n_usno: 48 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 1 matched entries is 1.194" for 928924_g312
Mean and std. dev of mag. difference (MAG_DELTA) are 1.826 and 0.000 for 928924_g312
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 928924_g312.
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=44.7240 (02:58:53.76) DEC=-27.8450 (-27:50:42.0)
XRT distances are from RA=44.7280 (02:58:54.72) DEC=-27.8454 (-27:50:43.4)
*** WARNING 50 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 928924_g312 with genie
ra=44.73952 (02:58:57.48) dec=-27.84985 (-27:50:59.4) +/- 0.8" mag=19.27+/-0.19
dist=40.0 REFID=1 major=2.0 minor=0.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 52.4 arc sec from the BAT position.
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)
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 2.0
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 11357.425 counts in the bkg source region of 6207.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 1.830 counts/pixel (5-sig UL in 4" is 20.14 mag) for 928924_g312
There are 412.29370 counts in the xrt source region of 202.00000 pixels.
Rate in xrt region with 8 arcsec radius is 2.041 counts/pixel for 928924_g312
There are 2217.4231 counts in the xrt_bkg source region of 1251.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 1.773 counts/pixel (5-sig UL in 4" is 20.15 mag) for 928924_g312
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 20.69, 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: 928924_592461669_191011d10h28m29s181585usUT_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(44.7299,-27.8460,45")
fk5;-circle(44.739516766141,-27.8498471248074,6")
Region file: 928924_592461669_191011d10h28m29s181585usUT_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(44.72800,-27.84539,8")
Region file: 928924_592461669_191011d10h28m29s181585usUT_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(44.72800,-27.84539,25")
fk5;-circle(44.72800,-27.84539,15")
image paragraph message for exposure 2 of trigger 928924
------ Start for Possible Stand-alone Circular ----
In response to GRB191011 (Swift/BAT trigger 928924) at 04:35:56 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
289 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
0.02.
------- notes for trigger 928924 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 191011d10h28m33s181219usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=928924
-expid=592461669 -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/928924/
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 592461669.8252 or about 2019:284:04:41:04 UT
Found 483 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 47 sources in
srclist catalog. Found 22 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 1 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.69 mag. Found 44 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 11357.4 counts in the large background region of 6207.0 pixels or a rate
of 1.830 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 20.18 mag. for a
4-arcsec aperture.
Found 412.3 counts in the XRT position region of 202.0 pixels or a rate of
2.041 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.217 +/- 0.087 (1-sigma) cps or
20.04 mag and a range from 19.67 to 20.59 mag. The 3-sigma UL at the XRT
position is 0.477 cps or 19.18 mag. The closest srclist source has ra= 44.7004
dec= -27.8561 mag=16.50 sep=96.07". The closest Genie source has ra= 44.7395
dec= -27.8498 mag=19.27 sep=40.02".
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?
592461669 288 U srclist found no candidates.
592461669 288 U image found no candidates.
List afterglow candidates for other finding charts.
592461457 76 WHITE srclist found no candidates.
592461457 76 WHITE 44.72832 -27.84541 20.20/20.9 1.0 image Yes
592462248 867 WHITE srclist found no candidates.
592462248 867 WHITE 44.72832 -27.84550 19.51/20.9 0.9 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -27.84539
GRB_ERROR: 5
GRB_RA: 44.72800
IMAGE_START_TIME: 04:41:04
MAGNITUDE: 19.2
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT