image overlap message for exposure 2 of trigger 811235
uvot_overlap.pl vrs. 2010-12-20b fem started at 180222d18h03m25s584759usUT
The observation of trigger 811235 started 2018-02-22T13:24:56.8
Examining file ./811235_g892_uvot_sky_image.fits
The exposure ID is 540998696
The exposure time is 149.868 (seconds)
The filter is WHITE.
*** Warning -- found 10531 null pixels in the image.
The uvot region is centered at (256.5769,-36.8039) with a roll angle of 91.8
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 (256.5710,-36.8030) with a radius of 3.000 arc min
This is 0.287 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 (256.5418,-36.8121) with a radius of 0.113 arc min
This is 1.755 arc min from the center of the uvot region
The area of the XRT error circle is 0.040 sq. arc min
The UVOT/XRT overlap is 0.00 sq. arc min or 0.01 of the XRT error circle
image afterglow message for exposure 2 of trigger 811235
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180222d18h04m03s323259usUT
Observation start time is 2018-02-22T13:24:56.8
Examining file ./811235_g892_uvot_catalog_image.fits
The exposure ID is 540998696
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 20 detected source(s) for 811235_g892
Aspect correction adds 0.00056 degrees (0.135 sec of time = 1.62 arc sec) to RA
Aspect correction adds -0.00203 degrees (-7.31 arcsec) to Dec
Total aspect correction is 7.48 arcsec
Star catalogs centered at 256.5755 , -36.7970 with radius 2.37 arc min.
n_usno: 724 n_gsc: 548
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 18 matched entries is 0.535" for 811235_g892
Mean and std. dev of mag. difference (MAG_DELTA) are 1.171 and 0.535 for 811235_g892
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 811235_g892.
Acceptable entries have no ID, XRT distances < 15", 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=256.5710 (17:06:17.04) DEC=-36.8030 (-36:48:10.8)
XRT distances are from RA=256.5418 (17:06:10.03) DEC=-36.8121 (-36:48:43.4)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 811235_g892 with genie
ra=256.56784 (17:06:16.28) dec=-36.80396 (-36:48:14.3) +/- 0.6" mag=13.74+/-0.14
dist=80.6 REFID=16 major=0.5 minor=0.3 flag=2 (blended)
*** The position of this source is inconsistent with the XRT position.
The position is 9.7 arc sec from the BAT position.
Found 22 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)
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
256.5715 -36.8005 16.3 -1 USNO-B1 99.99 20.93 99.99
256.5678 -36.8000 14.1 -1 USNO-B1 99.99 19.44 99.99
256.5673 -36.7991 17.5 -1 USNO-B1 21.04 17.58 19.12
256.5705 -36.8040 7.7 -1 USNO-B1 20.99 20.93 20.96
256.5674 -36.8033 2.5 -1 USNO-B1 99.99 20.93 99.99 *
256.5642 -36.8003 16.9 -1 USNO-B1 21.86 19.41 20.50
256.5684 -36.8049 3.8 -1 USNO-B1 19.86 20.93 20.45
256.5731 -36.8067 18.1 -1 USNO-B1 18.62 16.01 17.17
256.5694 -36.8060 8.5 -1 USNO-B1 17.85 15.22 16.39
256.5639 -36.8028 12.2 -1 USNO-B1 20.07 17.52 18.65
256.5672 -36.8083 15.8 -1 USNO-B1 18.48 15.66 16.91
256.5641 -36.8083 19.0 -1 USNO-B1 20.67 16.38 18.29
256.5618 -36.8067 19.9 -1 USNO-B1 20.76 18.53 19.52
256.5671 -36.7990 18.0 -1 GSC2.3 17.48 99.99 99.99
256.5746 -36.8042 19.5 -1 GSC2.3 18.22 99.99 99.99
256.5677 -36.8007 11.8 -1 GSC2.3 18.22 99.99 99.99
256.5643 -36.8004 16.4 -1 GSC2.3 18.20 99.99 99.99
256.5730 -36.8066 17.8 -1 GSC2.3 16.13 18.62 16.67
256.5693 -36.8060 8.4 -1 GSC2.3 15.28 17.89 16.16
256.5639 -36.8029 12.0 -1 GSC2.3 17.57 20.77 99.99
256.5672 -36.8082 15.3 -1 GSC2.3 15.75 18.63 16.88
256.5640 -36.8078 17.9 -1 GSC2.3 16.88 99.99 17.75
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 6 in the list of sources is a candidate afterglow for 811235_g892 with genie
ra=256.58203 (17:06:19.69) dec=-36.81168 (-36:48:42.1) +/- 0.6" mag=13.74+/-0.14
dist=116.0 REFID=1 major=11.6 minor=5.0 flag=18 (blended+aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 44.6 arc sec from the BAT position.
Found 29 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
256.5807 -36.8078 14.5 -1 USNO-B1 99.99 20.93 99.99
256.5822 -36.8074 15.4 -1 USNO-B1 99.99 20.93 99.99
256.5765 -36.8096 17.4 -1 USNO-B1 99.99 20.93 99.99
256.5830 -36.8086 11.3 -1 USNO-B1 99.99 19.73 99.99
256.5852 -36.8096 11.7 -1 USNO-B1 99.99 18.92 99.99
256.5777 -36.8124 12.6 -1 USNO-B1 21.12 17.59 19.16
256.5841 -36.8110 6.5 -1 USNO-B1 99.99 19.98 99.99
256.5885 -36.8102 19.4 -1 USNO-B1 19.55 16.38 17.79
256.5845 -36.8123 7.5 -1 USNO-B1 18.16 14.89 16.34
256.5850 -36.8124 9.0 -1 USNO-B1 17.28 14.29 15.62
256.5786 -36.8141 13.2 -1 USNO-B1 22.02 99.99 99.99
256.5814 -36.8136 7.2 -1 USNO-B1 20.03 17.46 18.60
256.5793 -36.8141 11.6 -1 USNO-B1 99.99 17.64 99.99
256.5788 -36.8148 14.5 -1 USNO-B1 99.99 17.74 99.99
256.5790 -36.8157 16.9 -1 USNO-B1 99.99 18.10 99.99
256.5815 -36.8162 16.4 -1 USNO-B1 19.45 99.99 99.99
256.5822 -36.8162 16.1 -1 USNO-B1 21.94 16.59 18.96
256.5826 -36.8161 16.1 -1 USNO-B1 99.99 17.32 99.99
256.5764 -36.8096 17.8 -1 GSC2.3 18.23 99.99 99.99
256.5850 -36.8095 11.7 -1 GSC2.3 17.97 99.99 99.99
256.5777 -36.8123 12.8 -1 GSC2.3 17.28 99.99 99.99
256.5886 -36.8102 19.8 -1 GSC2.3 16.54 99.99 17.51
256.5886 -36.8102 19.8 -1 GSC2.3 16.55 20.39 17.34
256.5844 -36.8124 7.3 -1 GSC2.3 15.15 19.08 16.17
256.5813 -36.8136 7.1 -1 GSC2.3 17.17 20.51 17.87
256.5864 -36.8124 12.8 -1 GSC2.3 15.72 20.46 17.46
256.5789 -36.8158 17.2 -1 GSC2.3 17.91 99.99 99.99
256.5814 -36.8162 16.2 -1 GSC2.3 16.66 19.72 17.51
256.5875 -36.8146 19.0 -1 GSC2.3 17.83 99.99 99.99
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 11.6
Found 4 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
256.5427 -36.8108 5.2 -1 USNO-B1 21.89 18.99 20.28
256.5418 -36.8140 7.1 -1 USNO-B1 20.16 17.42 18.64
256.5425 -36.8109 4.8 -1 GSC2.3 18.21 99.99 99.99
256.5417 -36.8139 6.5 -1 GSC2.3 17.61 99.99 17.70
The closest star is 4.81" away.
List UVOT sources within 10" of the XRT position:
There are 4.0455709E+05 counts in the bkg source region of 3563.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 113.544 counts/pixel (5-sig UL in 4" is 18.78 mag) for 811235_g892
Do not compute counts in XRT region because position is too far from center.
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 19.34, XRT distances < 15",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 811235_540998696_180222d18h04m03s323259usUT_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(256.5769,-36.8039,45")
fk5;-circle(256.567841953121,-36.8039632169802,6")
fk5;-circle(256.574154457649,-36.7950987584065,6")
fk5;-circle(256.564568649184,-36.7960943156264,6")
fk5;-circle(256.577528483809,-36.7951767463072,6")
fk5;-circle(256.572350038536,-36.7920677722358,6")
fk5;-circle(256.581521864181,-36.7955494697228,6")
fk5;-circle(256.582031566472,-36.8116842826123,6")
fk5;-circle(256.588013033365,-36.7986248706047,6")
fk5;-circle(256.588043943435,-36.8076484430669,6")
fk5;-circle(256.591112394913,-36.8047902420083,6")
fk5;-circle(256.590973609885,-36.8070894509765,6")
image paragraph message for exposure 2 of trigger 811235
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: damaged image (negative pixel value)
SRCLIST PROBLEM: 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 GRB180222 (Swift/BAT trigger 811235) at 13:10:03 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 processing
FAILED because of damaged image (negative pixel value). The 8'x8' region for
the list of sources generated on-board covers 0.00% of the XRT error circle. No
correction has been made for the large, but uncertain, extinction expected.
------- notes for trigger 811235 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180222d18h04m09s108941usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=811235
-expid=540998696 -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/811235/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Large extinction of 5.61 found for bat position. Unreliable extinction found
for xrt position. The Genie image appears to be DAMAGED with a min. value of
-1011.324036.
XRT position found for srclist. XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 540998696.77186 or about 2018:053:13:24:51 UT
Found 5000 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 71% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 164 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 20 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 19.34 mag. Found 720 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
89% of the Genie image region. The Genie image is INCOMPLETE with 10531 null
pixels.
The number of srclist sources filled the available telemetry. The weakest
source detected was 19.70 mag. The closest srclist source has ra= 256.6053 dec=
-36.7092 mag=19.29 sep=413.28". The closest Genie source has ra= 256.5678 dec=
-36.8040 mag=13.74 sep=80.55".
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?
540998696 871 WHITE srclist found no candidates.
540998696 871 WHITE image found no candidates.
List afterglow candidates for other finding charts.
540997906 81 WHITE srclist found no candidates.
540997906 81 WHITE image found no candidates.
------- Tokens for Quick GCN -------