srclist overlap message for exposure 3 of trigger 868312
uvot_overlap.pl vrs. 2010-12-20b fem started at 181022d17h51m45s306365usUT
The observation of trigger 868312 started 2018-10-22T17:44:59.2
Examining file ./868312_g885_uvot_sky_srclist.fits
The exposure ID is 561923099
The exposure time is undefined.
The filter is U.
The uvot region is centered at (56.8003,-29.3332) 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 0.287 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 2.824 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 868312
find_uvot_ag.pl vrs. 2017-02-17 fem started at 181022d17h51m57s154323usUT
Observation start time is 2018-10-22T17:44:59.2
Examining file ./868312_g885_uvot_catalog_srclist.fits
The exposure ID is 561923099
The exposure is 250.000 sec.
The bin size is 2 pixels
The filter is U
There are 38 detected source(s) for 868312_g885
Aspect correction adds 0.00082 degrees (0.197 sec of time = 2.57 arc sec) to RA
Aspect correction adds 0.00151 degrees ( 5.45 arcsec) to Dec
Total aspect correction is 6.03 arcsec
Star catalogs centered at 56.7874 , -29.3315 with radius 8.15 arc min.
n_usno: 578 n_gsc: 0
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 10.849
RA DEC Mag Color
bright star 0: 56.83557 (03:47:20.54) -29.24094 (-29:14:27.4) 11.60 USNO-V
bright star 1: 56.89957 (03:47:35.90) -29.35816 (-29:21:29.4) 10.85 USNO-V
Mean distance difference (CAT_DELTA) for 23 matched entries is 0.743" for 868312_g885
Mean and std. dev of mag. difference (MAG_DELTA) are 2.318 and 0.554 for 868312_g885
Found 15 entries without IDs and 0 entries that are acceptable afterglow candidates for 868312_g885.
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.
8 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 39 per cent of entries have no IDs.
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 18:
ra= 56.89588 dec=-29.36164 +/- 1.1" mag=19.74+/-0.35 dist=332.2 REFID=37
Found 0 entries in star catalog(s) within 10" of the XRT position.
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 3 of trigger 868312
------ 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 nominal 250.000 seconds with the U filter
starting 864 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 18.0 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 181022d17h51m58s171333usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=868312
-expid=561923099 -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/
*** Warning -- no exposure found, using srclist assumed value.
XRT position found for srclist. BAT position found.
UVOT exposure began at MET 561923099.1886 or about 2018:295:17:44:54 UT
Found 574 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 38 sources in
srclist catalog. Found 15 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 closest srclist source has ra= 56.7557 dec= -29.3593 mag=17.83
sep=135.53".
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?
561923099 864 U srclist found no candidates.
561923099 864 ? image data are not available.
List afterglow candidates for other finding charts.
561922332 97 U srclist found no candidates.
561922332 97 U image found no candidates.
561922591 356 ? srclist data are not available.
561922591 356 UVW2 image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: -29.37967
GRB_ERROR: 5.25
GRB_RA: 56.79204
IMAGE_START_TIME: 17:44:54
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT