srclist overlap message for exposure 1 of trigger 868312
uvot_overlap.pl vrs. 2010-12-20b fem started at 181022d17h51m44s205589usUT
The observation of trigger 868312 started 2018-10-22T17:32:12.3
Examining file ./868312_g118_uvot_sky_srclist.fits
The exposure ID is 561922332
The exposure time is undefined.
The filter is U.
The uvot region is centered at (56.8013,-29.3320) with a roll angle of 140.5
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 (56.7950,-29.3320) with a radius of 3.000 arc min
This is 0.327 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 (56.7920,-29.3797) with a radius of 0.035 arc min
This is 2.900 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 1 of trigger 868312
find_uvot_ag.pl vrs. 2017-02-17 fem started at 181022d17h51m47s578585usUT
Observation start time is 2018-10-22T17:32:12.3
Examining file ./868312_g118_uvot_catalog_srclist.fits
The exposure ID is 561922332
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 105 detected source(s) for 868312_g118
Aspect correction adds 0.00086 degrees (0.205 sec of time = 2.69 arc sec) to RA
Aspect correction adds 0.00159 degrees ( 5.73 arcsec) to Dec
Total aspect correction is 6.33 arcsec
Star catalogs centered at 56.7979 , -29.3311 with radius 8.61 arc min.
n_usno: 644 n_gsc: 0
*** WARNING -- bright star catalog has 3 entries brighter than 12 mag
The brightest has mag 7.00986
RA DEC Mag Color
bright star 0: 56.89957 (03:47:35.90) -29.35816 (-29:21:29.4) 10.85 USNO-V
bright star 1: 56.83557 (03:47:20.54) -29.24094 (-29:14:27.4) 11.60 USNO-V
bright star 2: 56.84288 (03:47:22.29) -29.46865 (-29:28:07.1) 7.01 USNO-V
Mean distance difference (CAT_DELTA) for 40 matched entries is 1.005" for 868312_g118
Mean and std. dev of mag. difference (MAG_DELTA) are 1.877 and 1.313 for 868312_g118
Found 67 entries without IDs and 2 entries that are acceptable afterglow candidates for 868312_g118.
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.
55 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=56.7950 (03:47:10.80) DEC=-29.3320 (-29:19:55.2)
XRT distances are from RA=56.7920 (03:47:10.09) DEC=-29.3797 (-29:22:46.8)
*** WARNING 63 per cent of entries have no IDs.
-----------------
Entry 10 in the list of sources is a candidate afterglow for 868312_g118 with 3x3 stamp
ra=56.74724 (03:46:59.34) dec=-29.35287 (-29:21:10.3) +/- 1.1" mag=19.67+/-0.35
dist=170.5 REFID=50
*** The position of this source is inconsistent with the XRT position.
The position is 167.7 arc sec from the BAT position.
src: 10 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
56.7481 -29.3529 2.6 -1 USNO-B1 17.63 16.30 16.89 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 12 in the list of sources is a candidate afterglow for 868312_g118 with 3x3 stamp
ra=56.85223 (03:47:24.53) dec=-29.34362 (-29:20:37.0) +/- 1.1" mag=19.87+/-0.35
dist=229.2 REFID=101
*** The position of this source is inconsistent with the XRT position.
The position is 184.4 arc sec from the BAT position.
src: 12 distr. of nearby unmatched sources: 0 0 0 0 0
Found 1 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
56.8515 -29.3387 17.8 -1 USNO-B1 20.91 99.99 99.99
*** If XRT position is correct, then this is NOT the afterglow
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 < 5.25",
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 1 of trigger 868312
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB181022 (Swift/BAT trigger 868312) at 17:30:13 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting 97
seconds after the BAT trigger. No credible afterglow candidate has been found
in the initial data products. The 2.7'x2.7' sub-image covers none of the XRT
error circle. 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 18.0 mag. No correction has been made for the expected extinction
corresponding to E(B-V) of 0.01.
------- notes for trigger 868312 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 181022d17h51m54s115782usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=868312
-expid=561922332 -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/868312/
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 561922332.3455 or about 2018:295:17:32:07 UT
Found 640 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 105 sources in
srclist catalog. Found 67 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 3 source(s) in Genie image catalog. Found 0 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.71 mag. Found 46 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 6% of the
Genie image region. The XRT position was OUTSIDE the star catalog search
region.
Genie image analysis:
Found 10877.2 counts in the large background region of 6207.0 pixels or a rate
of 1.752 counts/pixel in a radius of 45.0 arcsec. Based on this background, the
typical 5-sigma UL at a random point in the Genie image is 20.20 mag. for a
4-arcsec aperture. The closest srclist source has ra= 56.7556 dec= -29.3592
mag=16.97 sep=136.02". The closest Genie source has ra= 56.8057 dec= -29.3397
mag=19.64 sep=150.14".
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?
561922332 97 U srclist found no candidates.
561922332 97 U image found no candidates.
List afterglow candidates for other finding charts.
561922591 356 ? srclist data are not available.
561922591 356 UVW2 image found no candidates.
561923099 864 U srclist found no candidates.
561923099 864 ? image data are not available.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: -29.37967
GRB_ERROR: 5.25
GRB_RA: 56.79204
IMAGE_START_TIME: 17:32:07
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT