srclist overlap message for exposure 2 of trigger 887541
uvot_overlap.pl vrs. 2010-12-20b fem started at 190203d21h39m52s916111usUT
The observation of trigger 887541 started 2019-02-03T21:32:57.5
Examining file 887541_g879_uvot_sky_srclist.fits
The exposure ID is 570922377
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (262.2758,-36.2505) with a roll angle of 82.9
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 (262.3010,-36.2670) with a radius of 3.000 arc min
This is 1.568 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 27.29 sq. arc min or 0.97 of the BAT error circle
The XRT error circle is centered at (262.2442,-36.2421) with a radius of 0.078 arc min
This is 1.611 arc min from the center of the uvot region
The area of the XRT error circle is 0.019 sq. arc min
The UVOT/XRT overlap is 0.019 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 2 of trigger 887541
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190203d21h39m53s800704usUT
Observation start time is 2019-02-03T21:32:57.5
Examining file 887541_g879_uvot_catalog_srclist.fits
The exposure ID is 570922377
The exposure is 150.000 sec.
The bin size is 2 pixels
The filter is WHITE
There are 151 detected source(s) for 887541_g879
Aspect correction adds 0.00024 degrees (0.057 sec of time = 0.69 arc sec) to RA
Aspect correction adds 0.00004 degrees ( 0.15 arcsec) to Dec
Total aspect correction is 0.71 arcsec
Star catalogs centered at 262.2648 , -36.2505 with radius 6.54 arc min.
n_usno: 1705 n_gsc: 0
*** WARNING -- bright star catalog has 4 entries brighter than 12 mag
The brightest has mag 10.46348
RA DEC Mag Color
bright star 0: 262.24535 (17:28:58.88) -36.26051 (-36:15:37.8) 10.46 USNO-V
bright star 1: 262.26993 (17:29:04.78) -36.28672 (-36:17:12.2) 11.70 USNO-V
bright star 2: 262.30563 (17:29:13.35) -36.28287 (-36:16:58.3) 11.13 USNO-V
bright star 3: 262.15724 (17:28:37.74) -36.25693 (-36:15:25.0) 11.58 USNO-V
Mean distance difference (CAT_DELTA) for 139 matched entries is 0.839" for 887541_g879
Mean and std. dev of mag. difference (MAG_DELTA) are 1.477 and 0.768 for 887541_g879
Found 21 entries without IDs and 4 entries that are acceptable afterglow candidates for 887541_g879.
Acceptable entries have no ID, XRT distances < 11.75", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
11 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=262.3010 (17:29:12.24) DEC=-36.2670 (-36:16:01.2)
XRT distances are from RA=262.2442 (17:28:58.61) DEC=-36.2421 (-36:14:31.6)
-----------------
Entry 105 in the list of sources is a candidate afterglow for 887541_g879 with 1x1 stamp
ra=262.31956 (17:29:16.69) dec=-36.26451 (-36:15:52.2) +/- 1.1" mag=18.66+/-0.35
dist=233.1 REFID=143
*** The position of this source is inconsistent with the XRT position.
The position is 54.6 arc sec from the BAT position.
src: 105 distr. of nearby unmatched sources: 0 0 0 0 0
Found 6 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
262.3184 -36.2630 6.4 -1 USNO-B1 15.55 20.03 18.04
262.3188 -36.2633 4.9 -1 USNO-B1 18.17 16.02 16.98
262.3191 -36.2636 3.7 -1 USNO-B1 18.65 15.88 17.11 *
262.3193 -36.2658 4.6 -1 USNO-B1 22.74 19.31 20.83
262.3222 -36.2625 10.7 -1 USNO-B1 22.16 19.59 20.73
262.3232 -36.2673 14.7 -1 USNO-B1 17.00 15.21 16.00
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 135 in the list of sources is a candidate afterglow for 887541_g879 with 1x1 stamp
ra=262.33006 (17:29:19.22) dec=-36.28419 (-36:17:03.1) +/- 1.1" mag=18.74+/-0.35
dist=291.6 REFID=147
*** The position of this source is inconsistent with the XRT position.
The position is 104.6 arc sec from the BAT position.
src: 135 distr. of nearby unmatched sources: 0 0 0 0 0
Found 2 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
262.3252 -36.2805 19.2 -1 USNO-B1 20.22 18.70 19.38
262.3307 -36.2877 12.8 -1 USNO-B1 18.73 16.43 17.45
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 150 in the list of sources is a candidate afterglow for 887541_g879 with 1x1 stamp
ra=262.35312 (17:29:24.75) dec=-36.26739 (-36:16:02.6) +/- 1.1" mag=18.74+/-0.35
dist=329.0 REFID=150
*** The position of this source is inconsistent with the XRT position.
The position is 151.3 arc sec from the BAT position.
src: 150 distr. of nearby unmatched sources: 0 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
262.3471 -36.2675 17.5 -1 USNO-B1 22.85 20.93 21.78
262.3473 -36.2698 18.9 -1 USNO-B1 22.28 18.84 20.36
262.3525 -36.2711 13.5 -1 USNO-B1 99.99 19.52 99.99
262.3573 -36.2665 12.7 -1 USNO-B1 20.12 16.45 18.08
262.3573 -36.2676 12.1 -1 USNO-B1 22.77 16.59 19.33
262.3568 -36.2696 13.1 -1 USNO-B1 22.96 18.79 20.64
262.3578 -36.2664 13.9 -1 USNO-B1 22.97 19.20 20.87
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 156 in the list of sources is a candidate afterglow for 887541_g879 with 3x3 stamp
ra=262.36255 (17:29:27.01) dec=-36.24378 (-36:14:37.6) +/- 1.1" mag=17.79+/-0.35
dist=343.7 REFID=52
*** The position of this source is inconsistent with the XRT position.
The position is 197.3 arc sec from the BAT position.
src: 156 distr. of nearby unmatched sources: 0 0 0 0 0
Found 11 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
262.3573 -36.2471 19.4 -1 USNO-B1 22.75 18.94 20.63
262.3605 -36.2453 8.1 -1 USNO-B1 99.99 19.34 99.99
262.3627 -36.2489 18.5 -1 USNO-B1 99.99 17.87 99.99
262.3631 -36.2489 18.6 -1 USNO-B1 99.99 18.32 99.99
262.3633 -36.2438 2.2 -1 USNO-B1 18.92 14.85 16.66 *
262.3634 -36.2428 4.5 -1 USNO-B1 99.99 18.10 99.99
262.3644 -36.2489 19.0 -1 USNO-B1 22.97 19.16 20.85
262.3640 -36.2408 11.4 -1 USNO-B1 22.79 16.97 19.55
262.3649 -36.2421 9.2 -1 USNO-B1 18.53 16.73 17.53
262.3651 -36.2421 9.7 -1 USNO-B1 19.77 16.77 18.10
262.3664 -36.2458 13.1 -1 USNO-B1 20.68 18.70 19.58
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 3 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
262.2427 -36.2431 5.6 -1 USNO-B1 20.03 18.02 18.92
262.2430 -36.2408 5.8 -1 USNO-B1 21.95 18.99 20.30
262.2424 -36.2403 8.4 -1 USNO-B1 21.44 18.48 19.79
The closest star is 5.63" away.
List UVOT sources within 10" of the XRT position:
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.22, XRT distances < 11.75",
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 887541
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB190203 (Swift/BAT trigger 887541) at 21:18:17 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 857 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. The list of
sources is typically complete to about 18 mag. No correction has been made for
the large, but uncertain, extinction expected.
------- notes for trigger 887541 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190203d21h39m56s460812usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=887541
-expid=570922377 -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/887541/
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.
*** Warning -- BAT and XRT error circles do NOT overlap.
UVOT exposure began at MET 570922377.4831 or about 2019:034:21:32:52 UT
Found 1701 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 27% of the srclist region. Found 151 sources in
srclist catalog. Found 21 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 closest srclist source has ra= 262.2502 dec= -36.2354 mag=15.99 sep=29.65".
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?
570922377 857 WHITE srclist found no candidates.
570922377 857 ? image data are not available.
List afterglow candidates for other finding charts.
570922122 602 WHITE srclist found no candidates.
570922122 602 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -36.24210
GRB_ERROR: 11.75
GRB_RA: 262.24420
IMAGE_START_TIME: 21:32:52
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT