srclist overlap message for exposure 2 of trigger 874334
uvot_overlap.pl vrs. 2010-12-20b fem started at 181202d09h16m43s668635usUT
The observation of trigger 874334 started 2018-12-02T06:42:28.2
Examining file ./874334_g363_uvot_sky_srclist.fits
The exposure ID is 565425748
The exposure time is undefined.
The filter is B.
The uvot region is centered at (280.7426,27.9470) with a roll angle of 215.4
It is square with sides of 8.03 arc min. for an area of 64.51 sq arc min
The BAT error circle is centered at (280.7450,27.9510) with a radius of 3.000 arc min
This is 0.273 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 (280.7349,27.9596) with a radius of 0.030 arc min
This is 0.862 arc min from the center of the uvot region
The area of the XRT error circle is 0.003 sq. arc min
The UVOT/XRT overlap is 0.003 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 2 of trigger 874334
find_uvot_ag.pl vrs. 2017-02-17 fem started at 181202d09h17m07s634079usUT
Observation start time is 2018-12-02T06:42:28.2
Examining file ./874334_g363_uvot_catalog_srclist.fits
The exposure ID is 565425748
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is B
There are 190 detected source(s) for 874334_g363
*** 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 874334_g363 has mag 18.60
Aspect correction adds -0.00073 degrees (-0.175 sec of time = -2.32 arc sec) to RA
Aspect correction adds 0.00010 degrees ( 0.37 arcsec) to Dec
Total aspect correction is 2.35 arcsec
Star catalogs centered at 280.7408 , 27.9454 with radius 6.31 arc min.
n_usno: 1438 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 8.59752
RA DEC Mag Color
bright star 0: 280.69605 (18:42:47.05) 27.95753 (+27:57:27.1) 8.60 USNO-V
Mean distance difference (CAT_DELTA) for 138 matched entries is 0.689" for 874334_g363
Mean and std. dev of mag. difference (MAG_DELTA) are 1.036 and 0.879 for 874334_g363
Found 58 entries without IDs and 4 entries that are acceptable afterglow candidates for 874334_g363.
Acceptable entries have no ID, XRT distances < 5", 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=280.7450 (18:42:58.80) DEC=27.9510 (+27:57:03.6)
XRT distances are from RA=280.7349 (18:42:56.38) DEC=27.9596 (+27:57:34.7)
*** WARNING 30 per cent of entries have no IDs.
-----------------
Entry 4 in the list of sources is a candidate afterglow for 874334_g363 with 3x3 stamp
ra=280.74305 (18:42:58.33) dec=27.94492 (+27:56:41.7) +/- 1.1" mag=18.02+/-0.35
dist=59.0 REFID=97
*** The position of this source is inconsistent with the XRT position.
The position is 22.8 arc sec from the BAT position.
src: 4 distr. of nearby unmatched sources: 0 0 0 0 0
Found 5 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
280.7421 27.9455 3.8 -1 USNO-B1 15.65 14.21 14.85 *
280.7418 27.9482 12.3 -1 USNO-B1 17.87 16.66 17.20
280.7405 27.9496 18.8 -1 USNO-B1 17.00 16.05 16.47
280.7381 27.9418 19.5 -1 USNO-B1 20.52 19.55 19.98
280.7484 27.9474 19.3 -1 USNO-B1 20.56 19.58 20.02
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 13 in the list of sources is a candidate afterglow for 874334_g363 with 1x1 stamp
ra=280.76523 (18:43:03.65) dec=27.95729 (+27:57:26.2) +/- 1.1" mag=18.47+/-0.35
dist=96.7 REFID=138
*** The position of this source is inconsistent with the XRT position.
The position is 68.2 arc sec from the BAT position.
src: 13 distr. of nearby unmatched sources: 0 0 0 0 0
Found 3 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
280.7627 27.9599 12.4 -1 USNO-B1 20.29 18.76 19.44
280.7650 27.9588 5.7 -1 USNO-B1 20.05 19.29 19.63
280.7660 27.9582 4.0 -1 USNO-B1 16.02 14.72 15.30
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 32 in the list of sources is a candidate afterglow for 874334_g363 with 1x1 stamp
ra=280.78052 (18:43:07.33) dec=27.95790 (+27:57:28.4) +/- 1.1" mag=18.42+/-0.35
dist=145.2 REFID=186
*** The position of this source is inconsistent with the XRT position.
The position is 115.7 arc sec from the BAT position.
src: 32 distr. of nearby unmatched sources: 3 0 0 0 0
Found 7 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
280.7799 27.9525 19.5 -1 USNO-B1 18.39 17.29 17.78
280.7812 27.9586 3.2 -1 USNO-B1 15.46 14.00 14.65 *
280.7815 27.9586 3.9 -1 USNO-B1 15.23 99.99 99.99 *
280.7823 27.9583 5.8 -1 USNO-B1 17.93 99.99 99.99
280.7807 27.9623 15.8 -1 USNO-B1 17.62 16.31 16.89
280.7841 27.9551 15.0 -1 USNO-B1 20.43 19.30 19.80
280.7858 27.9554 19.0 -1 USNO-B1 99.99 20.28 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 33 in the list of sources is a candidate afterglow for 874334_g363 with 3x3 stamp
ra=280.78066 (18:43:07.36) dec=27.95891 (+27:57:32.1) +/- 1.1" mag=17.57+/-0.35
dist=145.5 REFID=80
*** The position of this source is inconsistent with the XRT position.
The position is 116.9 arc sec from the BAT position.
src: 33 distr. of nearby unmatched sources: 3 0 0 0 0
Found 6 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
280.7812 27.9586 2.0 -1 USNO-B1 15.46 14.00 14.65 *
280.7815 27.9586 2.9 -1 USNO-B1 15.23 99.99 99.99 *
280.7823 27.9583 5.6 -1 USNO-B1 17.93 99.99 99.99
280.7807 27.9623 12.2 -1 USNO-B1 17.62 16.31 16.89
280.7841 27.9551 17.4 -1 USNO-B1 20.43 19.30 19.80
280.7824 27.9640 19.0 -1 USNO-B1 20.26 19.50 19.84
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.12, XRT distances < 5",
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 874334
------ Start for Possible Stand-alone Circular ----
In response to GRB181202 (Swift/BAT trigger 874334) at 06:36:24 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the B filter starting
341 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 18:42:56.36 = 280.73483
DEC(J2000) = +27:57:35.4 = 27.95982
with a 90%-confidence error radius of about 0.82 arc sec. This position is 0.7
arc sec. from the center of the XRT error circle. The estimated magnitude is
19.88 with a 1-sigma error of about 0.23. No correction has been made for the
expected extinction of about 0.6 magnitudes.
------- notes for trigger 874334 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 181202d09h17m14s702200usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=874334
-expid=565425748 -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/874334/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
XRT position found for srclist. XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 565425748.19914 or about 2018:336:06:42:23 UT
Found 1434 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 25% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 58 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.12 mag.
Found 29 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 2 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.45 mag. Found 251 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 24% of the Genie image region. The
closest srclist source has ra= 280.7321 dec= 27.9527 mag=16.69 sep=26.50".
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?
565425748 341 B srclist found no candidates.
565425748 341 B 280.73483 27.95982 19.88/20.4 0.7 image Yes
List afterglow candidates for other finding charts.
565425492 85 U 280.73498 27.95963 17.89/18.1 0.2 srclist Yes
565425492 85 U 280.73490 27.95973 17.67/20.1 0.3 image Yes
565426275 868 U srclist found no candidates.
565426275 868 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: b
GRB_DEC: 27.95982
GRB_ERROR: 0.82
GRB_RA: 280.73483
IMAGE_START_TIME: 06:42:23
MAGNITUDE: 19.88
MAG_ERROR: 0.23
MESSAGE_TYPE: ACK
SOURCE: XRT