srclist overlap message for exposure 2 of trigger 808755
uvot_overlap.pl vrs. 2010-12-20b fem started at 180205d19h45m50s474920usUT
The observation of trigger 808755 started 2018-02-05T19:41:48.9
Examining file ./808755_g876_uvot_sky_srclist.fits
The exposure ID is 539552508
The exposure time is undefined.
The filter is U.
The uvot region is centered at (251.7544,-45.8485) with a roll angle of 85.3
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 (251.7490,-45.8500) with a radius of 3.000 arc min
This is 0.241 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 (251.7923,-45.8713) with a radius of 0.035 arc min
This is 2.092 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 2 of trigger 808755
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180205d19h46m06s000164usUT
Observation start time is 2018-02-05T19:41:48.9
Examining file ./808755_g876_uvot_catalog_srclist.fits
The exposure ID is 539552508
The exposure is 250.000 sec.
The bin size is 2 pixels
The filter is U
There are 190 detected source(s) for 808755_g876
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 1.000
srclist_overlap returned: xrt_overlap 1.000
Dimmest detected source in 808755_g876 has mag 18.21
Aspect correction adds 0.00059 degrees (0.141 sec of time = 1.47 arc sec) to RA
Aspect correction adds 0.00076 degrees ( 2.73 arcsec) to Dec
Total aspect correction is 3.10 arcsec
Star catalogs centered at 251.7543 , -45.8416 with radius 8.69 arc min.
n_usno: 3930 n_gsc: 9176
*** WARNING -- bright star catalog has 40 entries brighter than 12 mag
The brightest has mag 8.75702
RA DEC Mag Color
bright star 0: 251.76442 (16:47:03.46) -45.84649 (-45:50:47.4) 11.22 USNO-R
bright star 1: 251.75658 (16:47:01.58) -45.86180 (-45:51:42.5) 10.54 USNO-R
bright star 2: 251.73382 (16:46:56.12) -45.88732 (-45:53:14.3) 8.76 USNO-V
bright star 3: 251.72559 (16:46:54.14) -45.88710 (-45:53:13.5) 11.59 USNO-R
bright star 4: 251.73400 (16:46:56.16) -45.89254 (-45:53:33.2) 11.00 USNO-V
bright star 5: 251.76950 (16:47:04.68) -45.78821 (-45:47:17.6) 10.61 USNO-V
bright star 6: 251.67302 (16:46:41.52) -45.82886 (-45:49:43.9) 10.43 GSC-V
bright star 7: 251.80675 (16:47:13.62) -45.79252 (-45:47:33.1) 11.49 GSC-F
bright star 8: 251.71709 (16:46:52.10) -45.77128 (-45:46:16.6) 11.31 GSC-F
bright star 9: 251.84270 (16:47:22.25) -45.79007 (-45:47:24.3) 11.23 GSC-F
bright star 10: 251.63583 (16:46:32.60) -45.86718 (-45:52:01.9) 11.92 USNO-R
bright star 11: 251.70526 (16:46:49.26) -45.75937 (-45:45:33.7) 11.16 USNO-V
bright star 12: 251.61951 (16:46:28.68) -45.83791 (-45:50:16.5) 11.04 GSC-F
bright star 13: 251.70985 (16:46:50.36) -45.93360 (-45:56:01.0) 11.70 USNO-V
bright star 14: 251.60654 (16:46:25.57) -45.85631 (-45:51:22.7) 11.90 USNO-V
bright star 15: 251.90091 (16:47:36.22) -45.79787 (-45:47:52.3) 11.54 GSC-F
bright star 16: 251.88638 (16:47:32.73) -45.77943 (-45:46:46.0) 11.65 GSC-F
bright star 17: 251.63242 (16:46:31.78) -45.76541 (-45:45:55.5) 9.26 USNO-V
bright star 18: 251.71375 (16:46:51.30) -45.95552 (-45:57:19.9) 11.26 USNO-V
bright star 19: 251.63095 (16:46:31.43) -45.92291 (-45:55:22.5) 11.17 USNO-V
bright star 20: 251.62506 (16:46:30.01) -45.75194 (-45:45:07.0) 11.38 GSC-F
bright star 21: 251.74689 (16:46:59.25) -45.96883 (-45:58:07.8) 11.64 GSC-F
bright star 22: 251.57696 (16:46:18.47) -45.78855 (-45:47:18.8) 10.68 USNO-V
bright star 23: 251.88888 (16:47:33.33) -45.74481 (-45:44:41.3) 10.45 USNO-V
bright star 24: 251.67238 (16:46:41.37) -45.96794 (-45:58:04.6) 11.48 GSC-F
bright star 25: 251.63512 (16:46:32.43) -45.72615 (-45:43:34.1) 11.53 GSC-F
bright star 26: 251.75587 (16:47:01.41) -45.84358 (-45:50:36.9) 11.96 GSC-F
bright star 27: 251.76324 (16:47:03.18) -45.84789 (-45:50:52.4) 11.88 GSC-F
bright star 28: 251.71933 (16:46:52.64) -45.87579 (-45:52:32.8) 11.93 GSC-F
bright star 29: 251.79449 (16:47:10.68) -45.88079 (-45:52:50.9) 11.80 GSC-F
bright star 30: 251.73076 (16:46:55.38) -45.88790 (-45:53:16.4) 8.76 GSC-J
bright star 31: 251.69537 (16:46:46.89) -45.80947 (-45:48:34.1) 11.38 GSC-F
bright star 32: 251.75003 (16:47:00.01) -45.76768 (-45:46:03.6) 11.75 GSC-F
bright star 33: 251.73190 (16:46:55.66) -45.91789 (-45:55:04.4) 11.57 GSC-F
bright star 34: 251.68611 (16:46:44.67) -45.91950 (-45:55:10.2) 11.72 GSC-F
bright star 35: 251.62610 (16:46:30.26) -45.87315 (-45:52:23.4) 11.57 GSC-F
bright star 36: 251.59836 (16:46:23.61) -45.82826 (-45:49:41.7) 11.99 GSC-F
bright star 37: 251.64154 (16:46:33.97) -45.91917 (-45:55:09.0) 11.91 GSC-F
bright star 38: 251.73813 (16:46:57.15) -45.96189 (-45:57:42.8) 11.91 GSC-F
bright star 39: 251.71092 (16:46:50.62) -45.96202 (-45:57:43.3) 12.00 GSC-F
Mean distance difference (CAT_DELTA) for 126 matched entries is 0.911" for 808755_g876
Mean and std. dev of mag. difference (MAG_DELTA) are 2.801 and 0.706 for 808755_g876
Found 64 entries without IDs and 2 entries that are acceptable afterglow candidates for 808755_g876.
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.
52 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=251.7490 (16:46:59.76) DEC=-45.8500 (-45:51:00.0)
XRT distances are from RA=251.7923 (16:47:10.15) DEC=-45.8713 (-45:52:16.5)
*** WARNING 33 per cent of entries have no IDs.
-----------------
Entry 35 in the list of sources is a candidate afterglow for 808755_g876 with 1x1 stamp
ra=251.69246 (16:46:46.19) dec=-45.85518 (-45:51:18.6) +/- 1.1" mag=17.96+/-0.35
dist=256.9 REFID=138
*** The position of this source is inconsistent with the XRT position.
The position is 143.0 arc sec from the BAT position.
src: 35 distr. of nearby unmatched sources: 0 0 0 0 0
Found 21 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
251.6987 -45.8533 17.2 -1 USNO-B1 18.56 17.70 18.08
251.6981 -45.8561 14.6 -1 USNO-B1 18.51 17.31 17.84
251.6930 -45.8538 5.1 -1 USNO-B1 18.04 16.59 17.23
251.6931 -45.8557 2.5 -1 USNO-B1 15.02 13.97 14.44 *
251.6910 -45.8522 11.2 -1 USNO-B1 99.99 16.55 99.99
251.6886 -45.8555 9.8 -1 USNO-B1 17.40 15.82 16.52
251.6870 -45.8548 13.7 -1 USNO-B1 18.15 16.00 16.95
251.6864 -45.8534 16.5 -1 USNO-B1 18.61 15.28 16.76
251.6894 -45.8599 18.8 -1 USNO-B1 16.47 14.42 15.33
251.6873 -45.8583 17.1 -1 USNO-B1 17.97 15.43 16.56
251.6858 -45.8557 16.7 -1 USNO-B1 99.99 18.34 99.99
251.6985 -45.8533 16.6 -1 GSC2.3 17.49 19.44 99.99
251.6981 -45.8561 14.4 -1 GSC2.3 17.54 19.60 99.99
251.6929 -45.8536 5.8 -1 GSC2.3 17.43 19.26 99.99
251.6930 -45.8557 2.3 -1 GSC2.3 14.02 15.26 99.99 *
251.6908 -45.8522 11.6 -1 GSC2.3 17.11 21.29 99.99
251.6884 -45.8555 10.2 -1 GSC2.3 16.78 18.30 99.99
251.6867 -45.8527 16.9 -1 GSC2.3 16.62 99.99 99.99
251.6868 -45.8546 14.3 -1 GSC2.3 16.76 18.84 99.99
251.6893 -45.8599 18.8 -1 GSC2.3 14.36 16.96 99.99
251.6857 -45.8558 17.1 -1 GSC2.3 99.99 99.99 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
-----------------
Entry 74 in the list of sources is a candidate afterglow for 808755_g876 with 1x1 stamp
ra=251.80226 (16:47:12.54) dec=-45.89034 (-45:53:25.2) +/- 1.1" mag=17.59+/-0.35
dist=73.1 REFID=152
*** The position of this source is inconsistent with the XRT position.
The position is 197.3 arc sec from the BAT position.
src: 74 srclist_match has ID
src: 74 distr. of nearby unmatched sources: 0 0 0 0 0
Found 16 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
251.7961 -45.8894 15.7 -1 USNO-B1 18.80 17.56 18.11
251.8029 -45.8882 7.7 -1 USNO-B1 16.70 15.62 16.10
251.8077 -45.8863 19.8 -1 USNO-B1 16.36 15.12 15.67
251.8027 -45.8907 1.6 -1 USNO-B1 15.72 14.52 15.05 *
251.8025 -45.8922 6.6 -1 USNO-B1 15.01 14.34 14.64
251.8034 -45.8929 9.5 -1 USNO-B1 99.99 15.44 99.99
251.8055 -45.8947 17.7 -1 USNO-B1 19.18 18.38 18.73
251.7968 -45.8874 17.1 -1 GSC2.3 19.89 20.29 99.99
251.7961 -45.8894 15.8 -1 GSC2.3 17.74 19.78 99.99
251.8026 -45.8882 7.8 -1 GSC2.3 16.32 17.45 99.99
251.8076 -45.8864 19.5 -1 GSC2.3 15.63 16.86 99.99
251.8024 -45.8904 0.5 -1 GSC2.3 15.23 16.52 99.99 *
251.8015 -45.8921 6.7 -1 GSC2.3 16.42 17.28 99.99
251.8092 -45.8887 18.3 -1 GSC2.3 19.40 21.25 99.99
251.8034 -45.8929 9.7 -1 GSC2.3 16.22 17.53 99.99
251.8056 -45.8947 18.0 -1 GSC2.3 19.00 20.48 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 6 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
251.7889 -45.8700 9.7 -1 USNO-B1 18.89 17.82 18.30
251.7934 -45.8697 6.2 -1 USNO-B1 16.71 14.81 15.65
251.7951 -45.8705 7.5 -1 USNO-B1 18.83 17.64 18.17
251.7888 -45.8700 9.9 -1 GSC2.3 17.86 20.09 99.99
251.7926 -45.8702 3.9 -1 GSC2.3 15.80 17.71 99.99
251.7950 -45.8706 7.3 -1 GSC2.3 18.27 20.26 99.99
The closest star is 3.87" away.
List UVOT sources within 10" of the XRT position:
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 18.12, 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 2 of trigger 808755
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 GRB180205 (Swift/BAT trigger 808755) at 19:27:11 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 856 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 808755 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180205d19h46m15s587229usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=808755
-expid=539552508 -meonly -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/808755/
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 539552508.9418 or about 2018:036:19:41:43 UT
Found 4688 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 43% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 64 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.12 mag.
The number of srclist sources filled the available telemetry. The weakest
source detected was 18.21 mag. The closest srclist source has ra= 251.7944 dec=
-45.8811 mag=18.12 sep=35.82".
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?
539552508 855 U srclist found no candidates.
539552508 855 ? image data are not available.
List afterglow candidates for other finding charts.
539551752 99 U srclist found no candidates.
539551752 99 U image found no candidates.
------- Tokens for Quick GCN -------