srclist overlap message for exposure 2 of trigger 1002103
uvot_overlap.pl vrs. 2010-12-20b fem started at 201027d09h22m55s511655usUT
The observation of trigger 1002103 started 2020-10-26T22:43:00.5
Examining file ./1002103_g325_uvot_sky_srclist.fits
The exposure ID is 625444980
The exposure time is undefined.
The filter is U.
The uvot region is centered at (196.7636,83.7795) with a roll angle of 165.3
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 (196.6640,83.7610) with a radius of 3.000 arc min
This is 1.283 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 27.99 sq. arc min or 0.99 of the BAT error circle
The XRT error circle is centered at (196.7466,83.7819) with a radius of 0.032 arc min
This is 0.185 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 1002103
find_uvot_ag.pl vrs. 2017-02-17 fem started at 201027d09h23m12s129559usUT
Observation start time is 2020-10-26T22:43:00.5
Examining file ./1002103_g325_uvot_catalog_srclist.fits
The exposure ID is 625444980
The exposure is 250.000 sec.
The bin size is 2 pixels
The filter is U
There are 33 detected source(s) for 1002103_g325
Aspect correction adds 0.01033 degrees (2.479 sec of time = 4.05 arc sec) to RA
Aspect correction adds -0.00177 degrees (-6.36 arcsec) to Dec
Total aspect correction is 7.54 arcsec
Star catalogs centered at 196.6984 , 83.7829 with radius 5.84 arc min.
n_usno: 0 n_gsc: 0
*** WARNING -- no star catalog entries found.
-- this strongly suggests a problem with the catalogs.
-- cannot check for bright stars or nearby sources.
-- there is a high risk of false positives.
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 19 matched entries is 0.713" for 1002103_g325
Mean and std. dev of mag. difference (MAG_DELTA) are 2.562 and 0.469 for 1002103_g325
Found 14 entries without IDs and 7 entries that are acceptable afterglow candidates for 1002103_g325.
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.
Magnitude criteria will be applied later.
BAT distances are from RA=196.6640 (13:06:39.36) DEC=83.7610 (+83:45:39.6)
XRT distances are from RA=196.7466 (13:06:59.19) DEC=83.7819 (+83:46:55.0)
*** WARNING 42 per cent of entries have no IDs.
-----------------
Entry 1 in the list of sources is a candidate afterglow for 1002103_g325 with 5x5 stamp
ra=196.63501 (13:06:32.40) dec=83.77981 (+83:46:47.3) +/- 1.1" mag=19.37+/-0.35
dist=44.2 REFID=17
*** The position of this source is inconsistent with the XRT position.
The position is 68.6 arc sec from the BAT position.
src: 1 distr. of nearby unmatched sources: 1 1 0 0 0
Found 0 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)
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 3 in the list of sources is a candidate afterglow for 1002103_g325 with 5x5 stamp
ra=196.62971 (13:06:31.13) dec=83.77960 (+83:46:46.6) +/- 1.1" mag=18.99+/-0.35
dist=46.4 REFID=16
*** The position of this source is inconsistent with the XRT position.
The position is 68.3 arc sec from the BAT position.
src: 3 distr. of nearby unmatched sources: 1 1 0 0 0
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 14 in the list of sources is a candidate afterglow for 1002103_g325 with 5x5 stamp
ra=196.39320 (13:05:34.37) dec=83.75039 (+83:45:01.4) +/- 1.1" mag=19.34+/-0.35
dist=179.1 REFID=25
*** The position of this source is inconsistent with the XRT position.
The position is 112.7 arc sec from the BAT position.
src: 14 distr. of nearby unmatched sources: 2 0 0 0 0
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 16 in the list of sources is a candidate afterglow for 1002103_g325 with 5x5 stamp
ra=196.39102 (13:05:33.84) dec=83.75048 (+83:45:01.7) +/- 1.1" mag=19.41+/-0.35
dist=179.6 REFID=30
*** The position of this source is inconsistent with the XRT position.
The position is 113.4 arc sec from the BAT position.
src: 16 distr. of nearby unmatched sources: 2 0 0 0 0
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 18 in the list of sources is a candidate afterglow for 1002103_g325 with 5x5 stamp
ra=197.11155 (13:08:26.77) dec=83.74850 (+83:44:54.6) +/- 1.1" mag=19.07+/-0.35
dist=187.0 REFID=22
*** The position of this source is inconsistent with the XRT position.
The position is 181.0 arc sec from the BAT position.
src: 18 distr. of nearby unmatched sources: 1 1 0 0 0
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 19 in the list of sources is a candidate afterglow for 1002103_g325 with 5x5 stamp
ra=197.11741 (13:08:28.18) dec=83.74882 (+83:44:55.8) +/- 1.1" mag=18.99+/-0.35
dist=188.0 REFID=15
*** The position of this source is inconsistent with the XRT position.
The position is 182.9 arc sec from the BAT position.
src: 19 distr. of nearby unmatched sources: 1 1 0 0 0
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 28 in the list of sources is a candidate afterglow for 1002103_g325 with 5x5 stamp
ra=196.48030 (13:05:55.27) dec=83.72071 (+83:43:14.6) +/- 1.1" mag=19.12+/-0.35
dist=244.1 REFID=24
*** The position of this source is inconsistent with the XRT position.
The position is 162.0 arc sec from the BAT position.
src: 28 distr. of nearby unmatched sources: 0 0 0 0 0
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** 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",
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 1002103
------ Start for Possible Stand-alone Circular ----
In response to GRB201026 (Swift/BAT trigger 1002103) at 22:37:34 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 300 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 0.18.
------- notes for trigger 1002103 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 201027d09h23m19s793963usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1002103
-expid=625444980 -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/1002103/
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 625444980.48724 or about 2020:300:22:42:55 UT
There was likely a PROBLEM with the srclist star catalog because no stars
found. Found 33 sources in srclist catalog. Found 14 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= 196.6408 dec= 83.7785 mag=16.77 sep=43.04".
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?
625444980 299 U srclist found no candidates.
625444980 299 ? image data are not available.
List afterglow candidates for other finding charts.
625444767 86 WHITE srclist found no candidates.
625444767 86 WHITE image found no candidates.
625445559 878 ? srclist data are not available.
625445559 878 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: 83.78194
GRB_ERROR: 5
GRB_RA: 196.74662
IMAGE_START_TIME: 22:42:55
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT