image overlap message for exposure 1 of trigger 886486
uvot_overlap.pl vrs. 2010-12-20b fem started at 190129d09h39m22s844371usUT
The observation of trigger 886486 started 2019-01-29T09:22:48.0
Examining file 886486_g157_uvot_sky_image.fits
The exposure ID is 570446567
The exposure time is 149.846 (seconds)
The filter is WHITE.
The uvot region is centered at (247.8139,-47.8022) 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 3.874 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 0.93 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 0.364 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 0.024 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 886486
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190129d09h39m24s451983usUT
Observation start time is 2019-01-29T09:22:48.0
Examining file 886486_g157_uvot_catalog_image.fits
The exposure ID is 570446567
The exposure is 149.846 sec.
The bin size is 2 pixels
The filter is WHITE
There are 12 detected source(s) for 886486_g157
Aspect correction adds 0.00054 degrees (0.129 sec of time = 1.30 arc sec) to RA
Aspect correction adds 0.00042 degrees ( 1.51 arcsec) to Dec
Total aspect correction is 2.00 arcsec
Star catalogs centered at 247.8196 , -47.7985 with radius 2.47 arc min.
n_usno: 417 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.6424
RA DEC Mag Color
bright star 0: 247.76332 (16:31:03.20) -47.79031 (-47:47:25.1) 11.64 USNO-V
Mean distance difference (CAT_DELTA) for 12 matched entries is 0.934" for 886486_g157
Mean and std. dev of mag. difference (MAG_DELTA) are 1.606 and 0.434 for 886486_g157
Found 1 entries without IDs and 0 entries that are acceptable afterglow candidates for 886486_g157.
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.
0 sources matched bright stars.
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)
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 12:
ra=247.83944 dec=-47.78498 +/- 0.6" mag=17.53+/-0.14 dist=109.1 REFID=6 flag=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 2.0454953E+05 counts in the bkg source region of 5954.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 34.355 counts/pixel (5-sig UL in 4" is 19.43 mag) for 886486_g157
There are 7422.0488 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 36.926 counts/pixel for 886486_g157
There are 46927.602 counts in the xrt_bkg source region of 1246.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 37.663 counts/pixel (5-sig UL in 4" is 19.38 mag) for 886486_g157
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 19.98, 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_570446567_190129d09h39m24s451983usUT_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(247.8139,-47.8022,45")
fk5;-circle(247.809794970468,-47.7960138407033,6")
fk5;-circle(247.820833513658,-47.7932582399495,6")
fk5;-circle(247.805087534364,-47.7911850140615,6")
fk5;-circle(247.809520607414,-47.7905577257942,6")
fk5;-circle(247.825764624888,-47.7909500234514,6")
Region file: 886486_570446567_190129d09h39m24s451983usUT_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_570446567_190129d09h39m24s451983usUT_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 1 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
SRCLIST PROBLEM: high density of stars, srclist filled telemetry buffer
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ 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 150 seconds with the White filter
starting 135 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. 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 190129d09h39m31s012350usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=886486
-expid=570446567 -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 570446567.99238 or about 2019:029:09:22:42 UT
Found 2837 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 43% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 10 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 19.22 mag.
Found 12 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 19.98 mag. Found 413 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
47% of the Genie image region.
Genie image analysis:
Found 204549.5 counts in the large background region of 5954.0 pixels or a rate
of 34.355 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 19.43 mag. for a
4-arcsec aperture.
Found 7422.0 counts in the XRT position region of 201.0 pixels or a rate of
36.925 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.988 +/- 0.620 (1-sigma) cps. The
3-sigma UL at the XRT position is 1.859 cps or 19.11 mag. The number of srclist
sources filled the available telemetry. The weakest source detected was 18.70
mag. The closest srclist source has ra= 247.8058 dec= -47.8189 mag=16.75
sep=42.96". The closest Genie source has ra= 247.8098 dec= -47.7960 mag=18.35
sep=40.01".
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?
570446567 135 WHITE srclist found no candidates.
570446567 135 WHITE image found no candidates.
List afterglow candidates for other finding charts.
570446726 294 U srclist found no candidates.
570446726 294 U image data are not available.
------- Tokens for Quick GCN -------