image overlap message for exposure 2 of trigger 886486
uvot_overlap.pl vrs. 2010-12-20b fem started at 190129d09h39m29s662415usUT
The observation of trigger 886486 started 2019-01-29T09:25:26.0
Examining file 886486_g316_uvot_sky_image.fits
The exposure ID is 570446726
The exposure time is 109.605 (seconds)
The filter is U.
*** Warning -- found 10401 null pixels in the image.
The uvot region is centered at (247.8138,-47.8034) with a roll angle of 83.1
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 (247.7180,-47.8070) with a radius of 3.000 arc min
This is 3.867 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 0.95 sq. arc min or 0.03 of the BAT error circle
The XRT error circle is centered at (247.8086,-47.8071) with a radius of 0.087 arc min
This is 0.305 arc min from the center of the uvot region
The area of the XRT error circle is 0.024 sq. arc min
The UVOT/XRT overlap is 0.01 sq. arc min or 0.33 of the XRT error circle
image afterglow message for exposure 2 of trigger 886486
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190129d09h39m31s413487usUT
Observation start time is 2019-01-29T09:25:26.0
Examining file 886486_g316_uvot_catalog_image.fits
The exposure ID is 570446726
The exposure is 109.605 sec.
The bin size is 2 pixels
The filter is U
There are 1 detected source(s) for 886486_g316
Aspect correction adds 0.00193 degrees (0.464 sec of time = 4.67 arc sec) to RA
Aspect correction adds -0.00109 degrees (-3.94 arcsec) to Dec
Total aspect correction is 6.11 arcsec
Star catalogs centered at 247.8167 , -47.8047 with radius 2.00 arc min.
n_usno: 267 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 0 matched entries is 0.000" for 886486_g316
Mean and std. dev of mag. difference (MAG_DELTA) are 0.000 and -1.000 for 886486_g316
Found 1 entries without IDs and 0 entries that are acceptable afterglow candidates for 886486_g316.
Acceptable entries have no ID, XRT distances < 13", 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=247.7180 (16:30:52.32) DEC=-47.8070 (-47:48:25.2)
XRT distances are from RA=247.8086 (16:31:14.06) DEC=-47.8071 (-47:48:25.6)
*** WARNING 100 per cent of entries have no IDs.
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 0:
ra=247.81154 dec=-47.80690 +/- 0.7" mag= -nan+/-0.14 dist=7.2 REFID=1 flag=16
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=247.81154 (16:31:14.77) dec=-47.80690 (-47:48:24.9) +/- 0.7" mag= -nan+/-0.14 dist=7.2 REFID=1 flag=16
There are 8.4116088E+05 counts in the bkg source region of 4436.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 189.621 counts/pixel (5-sig UL in 4" is 16.72 mag) for 886486_g316
There are 1.5425538E+05 counts in the xrt source region of 76.000000 pixels.
Rate in xrt region with 8 arcsec radius is 2029.676 counts/pixel for 886486_g316
There are 2.2685869E+05 counts in the xrt_bkg source region of 594.00000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 381.917 counts/pixel (5-sig UL in 4" is 16.34 mag) for 886486_g316
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 17.28, XRT distances < 13",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 886486_570446726_190129d09h39m31s413487usUT_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(247.8138,-47.8034,45")
fk5;-circle(247.811543575812,-47.8069046746209,6")
Region file: 886486_570446726_190129d09h39m31s413487usUT_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(247.8086,-47.8071,8")
Region file: 886486_570446726_190129d09h39m31s413487usUT_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(247.8086,-47.8071,25")
fk5;-circle(247.8086,-47.8071,15")
image paragraph message for exposure 2 of trigger 886486
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: high density of stars, partial overlap
SRCLIST PROBLEM: high density of stars
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
1 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB190129 (Swift/BAT trigger 886486) at 09:20:09 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 110 seconds with the U filter starting
294 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 33% of the
XRT error circle. Because of the density of catalogued stars, further analysis
is required to report an upper limit for any afterglow in the sub-image. The
8'x8' region for the list of sources generated on-board covers 100% of the XRT
error circle. Because of the density of catalogued stars, further analysis is
required to report an upper limit for any afterglow in the region. No
correction has been made for the large, but uncertain, extinction expected.
------- notes for trigger 886486 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190129d09h39m39s190101usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=886486
-expid=570446726 -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/886486/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for bat position. Unreliable extinction found for
xrt position. XRT position found for srclist. XRT position found for Genie
image. BAT position found.
*** Warning -- BAT and XRT error circles do NOT overlap.
UVOT exposure began at MET 570446726.01686 or about 2019:029:09:25:21 UT
Found 2511 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 43% of the srclist region. Found 70 sources in
srclist catalog. Found 10 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 1 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. 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
17.28 mag. Found 263 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 45% of the Genie image region. The
Genie image is INCOMPLETE with 10401 null pixels.
Genie image analysis:
Found 841160.9 counts in the large background region of 4436.0 pixels or a rate
of 189.621 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 16.77 mag. for a
4-arcsec aperture.
Found 154255.4 counts in the XRT position region of 76.0 pixels or a rate of
2029.676 counts/pixel in a radius of 8.0 arcsec. The net count rate (using
local background region) at the XRT position is 1138.452 +/- 3.613 (1-sigma)
cps or 10.74 mag and a range from 10.74 to 10.74 mag. The 3-sigma UL at the XRT
position is 1149.292 cps or 10.73 mag. The closest srclist source has ra=
247.8056 dec= -47.8189 mag=17.86 sep=43.07".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 247.8115 dec= -47.8069 mag= nan sep=7.15". The closest Genie
source has ra= 247.8115 dec= -47.8069 mag= nan sep=7.15".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 110 seconds with the U filter starting
294 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 16:31:14.77 = 247.81154
DEC(J2000) = -47:48:24.8 = -47.80690
with a 90%-confidence error radius of about 0.74 arc sec. This position is 7.15
arc sec. from the center of the XRT error circle. The estimated magnitude is
nan with a 1-sigma error of about 0.14. No correction has been made for the
large, but uncertain, extinction expected.
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?
570446726 294 U srclist found no candidates.
570446726 294 U image found no candidates.
List afterglow candidates for other finding charts.
570446567 135 WHITE srclist found no candidates.
570446567 135 WHITE image found no candidates.
------- Tokens for Quick GCN -------