srclist overlap message for exposure 3 of trigger 1005428
uvot_overlap.pl vrs. 2010-12-20b fem started at 201111d10h06m57s346229usUT
The observation of trigger 1005428 started 2020-11-11T10:00:01.7
Examining file 1005428_g894_uvot_sky_srclist.fits
The exposure ID is 626781601
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (277.6964,-6.7441) with a roll angle of 252.7
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 (277.7010,-6.7410) with a radius of 3.000 arc min
This is 0.330 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
The XRT error circle is centered at (277.6737,-6.7548) with a radius of 0.035 arc min
This is 1.497 arc min from the center of the uvot region
The area of the XRT error circle is 0.004 sq. arc min
The UVOT/XRT overlap is 0.004 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 3 of trigger 1005428
find_uvot_ag.pl vrs. 2020-10-30 fem started at 201111d10h06m58s944791usUT
Observation start time is 2020-11-11T10:00:01.7
Examining file 1005428_g894_uvot_catalog_srclist.fits
The exposure ID is 626781601
The exposure is 150.000 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 1005428_g894
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 0.944
srclist_overlap returned: xrt_overlap 1.000
Dimmest detected source in 1005428_g894 has mag 18.48
Aspect correction adds -0.00045 degrees (-0.107 sec of time = -1.59 arc sec) to RA
Aspect correction adds -0.00090 degrees (-3.23 arcsec) to Dec
Total aspect correction is 3.60 arcsec
Star catalogs centered at 277.6960 , -6.7568 with radius 7.93 arc min.
n_usno: 4636 n_gsc: 0
*** WARNING -- bright star catalog has 12 entries brighter than 12 mag
The brightest has mag 10.63288
RA DEC Mag Color
bright star 0: 277.64114 (18:30:33.87) -6.72263 (-06:43:21.5) 12.00 USNO-R
bright star 1: 277.64008 (18:30:33.62) -6.72227 (-06:43:20.2) 11.80 USNO-R
bright star 2: 277.71620 (18:30:51.89) -6.83105 (-06:49:51.8) 11.92 USNO-V
bright star 3: 277.62251 (18:30:29.40) -6.73027 (-06:43:49.0) 11.75 USNO-R
bright star 4: 277.76444 (18:31:03.47) -6.71431 (-06:42:51.5) 10.63 USNO-V
bright star 5: 277.63296 (18:30:31.91) -6.66255 (-06:39:45.2) 11.50 USNO-V
bright star 6: 277.72046 (18:30:52.91) -6.86783 (-06:52:04.2) 11.81 USNO-V
bright star 7: 277.60761 (18:30:25.83) -6.84238 (-06:50:32.6) 11.62 USNO-V
bright star 8: 277.79150 (18:31:09.96) -6.67768 (-06:40:39.6) 11.95 USNO-R
bright star 9: 277.61491 (18:30:27.58) -6.85297 (-06:51:10.7) 11.94 USNO-V
bright star 10: 277.82610 (18:31:18.26) -6.73594 (-06:44:09.4) 11.06 USNO-R
bright star 11: 277.68832 (18:30:45.20) -6.88788 (-06:53:16.4) 12.00 USNO-V
Mean distance difference (CAT_DELTA) for 183 matched entries is 0.886" for 1005428_g894
Mean and std. dev of mag. difference (MAG_DELTA) are 2.076 and 0.565 for 1005428_g894
Found 18 entries without IDs and 1 entries that are acceptable afterglow candidates for 1005428_g894.
Acceptable entries have no ID, XRT distances < 5.25", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
3 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=277.7010 (18:30:48.24) DEC=-6.7410 (-06:44:27.6)
XRT distances are from RA=277.6737 (18:30:41.69) DEC=-6.7548 (-06:45:17.2)
-----------------
Entry 19 in the list of sources is a candidate afterglow for 1005428_g894 with 3x3 stamp
ra=277.67398 (18:30:41.76) dec=-6.75302 (-06:45:10.9) +/- 1.1" mag=17.08+/-0.35
dist=6.4 REFID=73
*** The position of this source is inconsistent with the XRT position.
The position is 105.8 arc sec from the BAT position.
src: 19 distr. of nearby unmatched sources: 0 0 0 0 0
Found 8 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
277.6770 -6.7571 18.2 -1 USNO-B1 19.23 16.98 17.98
277.6769 -6.7520 11.1 -1 USNO-B1 19.09 16.06 17.41
277.6734 -6.7575 16.1 -1 USNO-B1 16.32 14.69 15.41
277.6734 -6.7536 2.9 -1 USNO-B1 15.05 13.09 13.96 *
277.6715 -6.7516 10.2 -1 USNO-B1 19.07 16.75 17.78
277.6710 -6.7502 14.8 -1 USNO-B1 17.08 14.48 15.64
277.6696 -6.7529 15.6 -1 USNO-B1 18.20 15.30 16.59
277.6694 -6.7519 16.8 -1 USNO-B1 99.99 17.14 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 2 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
277.6734 -6.7575 9.7 -1 USNO-B1 16.32 14.69 15.41
277.6734 -6.7536 4.3 -1 USNO-B1 15.05 13.09 13.96
The closest star is 4.35" away.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=277.67398 (18:30:41.76) dec=-6.75302 (-06:45:10.9) +/- 1.1" mag=17.08+/-0.35 dist=6.4 REFID=73
Matched source ra=277.67343 (18:30:41.62) dec=-6.75750 (-06:45:27.0) +/- 1.1" mag=17.34+/-0.35 dist=9.8 REFID=101
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 19.22, XRT distances < 5.25",
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 1005428
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: 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 GRB201111 (Swift/BAT trigger 1005428) at 09:45:06 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 869 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 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 1005428 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 201111d10h07m05s713615usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1005428
-expid=626781601 -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/1005428/
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.
*** Warning -- no exposure found, using srclist assumed value.
XRT position found for srclist. BAT position found.
UVOT exposure began at MET 626781601.7051 or about 2020:316:09:59:56 UT
Found 4632 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 51% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 18 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 19.22 mag.
The number of srclist sources filled the available telemetry. The weakest
source detected was 18.48 mag.
Found 2 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 277.6740 dec= -6.7530 mag=17.08 sep=6.43".
The closest srclist source has ra= 277.6740 dec= -6.7530 mag=17.08 sep=6.43".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of nominal 150.000 seconds with the White
filter starting 869 seconds after the BAT trigger. There is a candidate
afterglow in the list of sources generated on-board at
RA(J2000) = 18:30:41.76 = 277.67398
DEC(J2000) = -06:45:10.9 = -6.75302
with a 90%-confidence error radius of about 1.10 arc sec. This position is 6.43
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.08 with a 1-sigma error of about 0.35. No correction has been made for the
large, but uncertain, extinction expected.
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?
626781601 868 WHITE srclist found no candidates.
626781601 868 ? image data are not available.
List afterglow candidates for other finding charts.
626780787 54 WHITE srclist found no candidates.
626780787 54 WHITE image found no candidates.
626780999 266 U srclist found no candidates.
626780999 266 U image found no candidates.
------- Tokens for Quick GCN -------