srclist overlap message for exposure 3 of trigger 878504
uvot_overlap.pl vrs. 2010-12-20b fem started at 181222d22h00m54s311838usUT
The observation of trigger 878504 started 2018-12-22T21:56:51.8
Examining file 878504_g881_uvot_sky_srclist.fits
The exposure ID is 567208611
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (131.3807,-5.4923) with a roll angle of 128.0
It is square with sides of 12.05 arc min. for an area of 145.15 sq arc min
The BAT error circle is centered at (131.3750,-5.4880) with a radius of 3.000 arc min
This is 0.426 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 28.27 sq. arc min or 1.00 of the BAT error circle
Could not find the location of an XRT error circle
srclist afterglow message for exposure 3 of trigger 878504
find_uvot_ag.pl vrs. 2017-02-17 fem started at 181222d22h00m55s533533usUT
Observation start time is 2018-12-22T21:56:51.8
Examining file 878504_g881_uvot_catalog_srclist.fits
The exposure ID is 567208611
The exposure is 150.000 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 878504_g881
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 1.000
Dimmest detected source in 878504_g881 has mag 19.29
Aspect correction adds 0.00096 degrees (0.231 sec of time = 3.45 arc sec) to RA
Aspect correction adds -0.00173 degrees (-6.21 arcsec) to Dec
Total aspect correction is 7.11 arcsec
Star catalogs centered at 131.3814 , -5.4850 with radius 8.75 arc min.
n_usno: 801 n_gsc: 0
*** WARNING -- bright star catalog has 7 entries brighter than 12 mag
The brightest has mag 9.79824
RA DEC Mag Color
bright star 0: 131.43204 (08:45:43.69) -5.54334 (-05:32:36.0) 11.58 USNO-V
bright star 1: 131.36648 (08:45:27.96) -5.39888 (-05:23:56.0) 10.67 USNO-V
bright star 2: 131.30479 (08:45:13.15) -5.44138 (-05:26:29.0) 9.80 USNO-V
bright star 3: 131.36173 (08:45:26.82) -5.38436 (-05:23:03.7) 11.90 USNO-V
bright star 4: 131.49270 (08:45:58.25) -5.44486 (-05:26:41.5) 11.78 USNO-V
bright star 5: 131.43729 (08:45:44.95) -5.36522 (-05:21:54.8) 10.46 USNO-V
bright star 6: 131.25129 (08:45:00.31) -5.53074 (-05:31:50.7) 10.35 USNO-V
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 114 matched entries is 0.653" for 878504_g881
Mean and std. dev of mag. difference (MAG_DELTA) are 0.852 and 0.543 for 878504_g881
Found 76 entries without IDs and 1 entries that are acceptable afterglow candidates for 878504_g881.
Acceptable entries have no ID, BAT distance < 200" or XRT distance < 10", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
72 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=131.3750 (08:45:30.00) DEC=-5.4880 (-05:29:16.8)
XRT distances are as reported in catalog file.
*** WARNING 40 per cent of entries have no IDs.
-----------------
Entry 9 in the list of sources is a candidate afterglow for 878504_g881 with 3x3 stamp
ra=131.41358 (08:45:39.26) dec=-5.48982 (-05:29:23.4) +/- 1.1" mag=17.50+/-0.35
dist=138.4 REFID=45
src: 9 distr. of nearby unmatched sources: 1 0 0 0 0
Found 3 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
131.4100 -5.4940 19.8 -1 USNO-B1 20.74 18.19 19.32
131.4141 -5.4903 2.4 -1 USNO-B1 16.40 15.39 15.84 *
131.4152 -5.4919 9.5 -1 USNO-B1 14.86 13.75 14.24
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.66, BAT distances < 200",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
srclist paragraph message for exposure 3 of trigger 878504
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no image afterglow info
SRCLIST PROBLEM: srclist filled telemetry buffer
See notes for more details.
------ Start for Possible Stand-alone Circular ----
In response to GRB181222 (Swift/BAT trigger 878504) at 21:42:09 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of nominal 150.000 seconds with the White
filter starting 859 seconds after the BAT trigger. No credible afterglow
candidate has been found in the initial data products. Data from the 2.7'x2.7'
sub-image are not available at this time. The 8'x8' region for the list of
sources generated on-board covers 100% of the BAT 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 0.02.
------- notes for trigger 878504 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 181222d22h00m57s937588usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=878504
-expid=567208611 -msg_srclist
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/878504/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
*** Warning -- no exposure found, using srclist assumed value.
No XRT position found for srclist. BAT position found.
UVOT exposure began at MET 567208611.80462 or about 2018:356:21:56:46 UT
Found 797 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 76 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.66 mag.
The number of srclist sources filled the available telemetry. The weakest
source detected was 19.29 mag.
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?
567208611 859 WHITE srclist found no candidates.
567208611 859 ? image data are not available.
List afterglow candidates for other finding charts.
567207899 147 WHITE srclist found no candidates.
567207899 147 WHITE 131.38654 -5.48564 21.11/20.2 42.2 image Yes
567207899 147 WHITE 131.39962 -5.47410 21.40/20.2 101.4 image Yes
567208058 306 U srclist found no candidates.
567208058 306 U 131.37669 -5.47878 20.92/20.0 33.7 image Yes
------- Tokens for Quick GCN -------