srclist overlap message for exposure 2 of trigger 878504
uvot_overlap.pl vrs. 2010-12-20b fem started at 181222d21h54m44s823620usUT
The observation of trigger 878504 started 2018-12-22T21:47:38.2
Examining file 878504_g328_uvot_sky_srclist.fits
The exposure ID is 567208058
The exposure time is undefined.
The filter is U.
The uvot region is centered at (131.3806,-5.4911) with a roll angle of 127.9
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 0.384 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 2 of trigger 878504
find_uvot_ag.pl vrs. 2017-02-17 fem started at 181222d21h54m45s723638usUT
Observation start time is 2018-12-22T21:47:38.2
Examining file 878504_g328_uvot_catalog_srclist.fits
The exposure ID is 567208058
The exposure is 250.000 sec.
The bin size is 2 pixels
The filter is U
There are 176 detected source(s) for 878504_g328
Aspect correction adds 0.00120 degrees (0.287 sec of time = 4.29 arc sec) to RA
Aspect correction adds -0.00157 degrees (-5.67 arcsec) to Dec
Total aspect correction is 7.11 arcsec
Star catalogs centered at 131.3814 , -5.4914 with radius 8.37 arc min.
n_usno: 731 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: 131.30479 (08:45:13.15) -5.44138 (-05:26:29.0) 9.80 USNO-V
bright star 2: 131.36648 (08:45:27.96) -5.39888 (-05:23:56.0) 10.67 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: 131.25129 (08:45:00.31) -5.53074 (-05:31:50.7) 10.35 USNO-V
bright star 6: 131.43729 (08:45:44.95) -5.36522 (-05:21:54.8) 10.46 USNO-V
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 98 matched entries is 0.809" for 878504_g328
Mean and std. dev of mag. difference (MAG_DELTA) are 1.097 and 1.008 for 878504_g328
Found 79 entries without IDs and 2 entries that are acceptable afterglow candidates for 878504_g328.
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.
70 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 44 per cent of entries have no IDs.
-----------------
Entry 5 in the list of sources is a candidate afterglow for 878504_g328 with 1x1 stamp
ra=131.40386 (08:45:36.93) dec=-5.47386 (-05:28:25.9) +/- 1.1" mag=18.52+/-0.35
dist=115.3 REFID=127
src: 5 distr. of nearby unmatched sources: 0 0 0 0 0
Found 1 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
131.4039 -5.4750 4.1 -1 USNO-B1 14.18 12.99 13.52 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 7 in the list of sources is a candidate afterglow for 878504_g328 with 3x3 stamp
ra=131.41362 (08:45:39.27) dec=-5.48993 (-05:29:23.8) +/- 1.1" mag=17.92+/-0.35
dist=138.6 REFID=49
src: 7 distr. of nearby unmatched sources: 1 1 0 0 0
Found 4 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
131.4100 -5.4940 19.6 -1 USNO-B1 20.74 18.19 19.32
131.4141 -5.4903 2.0 -1 USNO-B1 16.40 15.39 15.84 *
131.4152 -5.4919 9.1 -1 USNO-B1 14.86 13.75 14.24
131.4168 -5.4944 19.6 -1 USNO-B1 17.76 16.86 17.25
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 17.56, 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 2 of trigger 878504
------ 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 250.000 seconds with the U filter
starting 306 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 18.0 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 181222d21h54m47s311726usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=878504
-expid=567208058 -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 567208058.21692 or about 2018:356:21:47:33 UT
Found 727 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 176 sources in
srclist catalog. Found 79 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
17.56 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?
567208058 306 U srclist found no candidates.
567208058 306 ? 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
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: -5.48800
GRB_ERROR: 200
GRB_RA: 131.37500
IMAGE_START_TIME: 21:47:33
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: BAT