image overlap message for exposure 3 of trigger 874475
uvot_overlap.pl vrs. 2010-12-20b fem started at 181203d14h29m09s589822usUT
The observation of trigger 874475 started 2018-12-03T12:23:42.8
Examining file ./874475_g894_uvot_sky_image.fits
The exposure ID is 565532622
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (108.3520,-39.8112) with a roll angle of 142.4
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 (108.3690,-39.7690) with a radius of 3.000 arc min
This is 2.648 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 4.25 sq. arc min or 0.15 of the BAT error circle
The XRT error circle is centered at (108.3486,-39.8019) with a radius of 0.033 arc min
This is 0.579 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 3 of trigger 874475
find_uvot_ag.pl vrs. 2017-02-17 fem started at 181203d14h29m47s590771usUT
Observation start time is 2018-12-03T12:23:42.8
Examining file ./874475_g894_uvot_catalog_image.fits
The exposure ID is 565532622
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 29 detected source(s) for 874475_g894
Aspect correction adds 0.00216 degrees (0.519 sec of time = 5.98 arc sec) to RA
Aspect correction adds -0.00025 degrees (-0.91 arcsec) to Dec
Total aspect correction is 6.05 arcsec
Star catalogs centered at 108.3516 , -39.8106 with radius 2.84 arc min.
n_usno: 190 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 29 matched entries is 0.428" for 874475_g894
Mean and std. dev of mag. difference (MAG_DELTA) are 1.237 and 0.750 for 874475_g894
Found 2 entries without IDs and 0 entries that are acceptable afterglow candidates for 874475_g894.
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=108.3690 (07:13:28.56) DEC=-39.7690 (-39:46:08.4)
XRT distances are from RA=108.3486 (07:13:23.66) DEC=-39.8019 (-39:48:06.7)
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 9:
ra=108.32328 dec=-39.81406 +/- 0.7" mag=19.77+/-0.18 dist=82.6 REFID=21 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 64377.000 counts in the bkg source region of 5806.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 11.088 counts/pixel (5-sig UL in 4" is 20.04 mag) for 874475_g894
There are 2110.0918 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 10.550 counts/pixel for 874475_g894
There are 13222.643 counts in the xrt_bkg source region of 1167.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 11.330 counts/pixel (5-sig UL in 4" is 20.03 mag) for 874475_g894
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 20.60, 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: 874475_565532622_181203d14h29m47s590771usUT_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(108.3520,-39.8112,45")
fk5;-circle(108.340362386409,-39.8076236009874,6")
fk5;-circle(108.353864303573,-39.811188904745,6")
fk5;-circle(108.35695839808,-39.8069778784692,6")
fk5;-circle(108.343563629227,-39.8217586012533,6")
fk5;-circle(108.350210540427,-39.8221947988253,6")
Region file: 874475_565532622_181203d14h29m47s590771usUT_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(108.34858,-39.80186,8")
Region file: 874475_565532622_181203d14h29m47s590771usUT_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(108.34858,-39.80186,25")
fk5;-circle(108.34858,-39.80186,15")
fk5;-circle(108.340362386409,-39.8076236009874,6")
fk5;-circle(108.35695839808,-39.8069778784692,6")
fk5;-circle(108.340641191123,-39.7995381519676,6")
image paragraph message for exposure 3 of trigger 874475
SRCLIST PROBLEM: srclist filled telemetry buffer
------ Start for Possible Stand-alone Circular ----
In response to GRB181203 (Swift/BAT trigger 874475) at 12:08:47 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 872 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 19.6 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 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.24.
------- notes for trigger 874475 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 181203d14h29m54s928284usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=874475
-expid=565532622 -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/874475/
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 565532622.8387 or about 2018:337:12:23:37 UT
Found 2039 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 17% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 9 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 29 source(s) in Genie image catalog. Found 2 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.60 mag. Found 186 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
16% of the Genie image region.
Genie image analysis:
Found 64377.0 counts in the large background region of 5806.0 pixels or a rate
of 11.088 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 20.04 mag. for a
4-arcsec aperture.
Found 2110.1 counts in the XRT position region of 200.0 pixels or a rate of
10.550 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -1.040 +/- 0.333 (1-sigma) cps. The
3-sigma UL at the XRT position is 1.000 cps or 19.78 mag. The number of srclist
sources filled the available telemetry. The weakest source detected was 18.98
mag. The closest srclist source has ra= 108.3568 dec= -39.8070 mag=16.17
sep=29.29". The closest Genie source has ra= 108.3406 dec= -39.7995 mag=19.85
sep=23.49".
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?
565532622 872 WHITE srclist found no candidates.
565532622 872 WHITE image found no candidates.
List afterglow candidates for other finding charts.
565531829 79 WHITE srclist found no candidates.
565531829 79 WHITE image found no candidates.
565532043 293 U srclist found no candidates.
565532043 293 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -39.80186
GRB_ERROR: 5
GRB_RA: 108.34858
IMAGE_START_TIME: 12:23:37
MAGNITUDE: 19.8
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT