srclist overlap message for exposure 2 of trigger 1002158
uvot_overlap.pl vrs. 2010-12-20b fem started at 201027d11h16m14s078843usUT
The observation of trigger 1002158 started 2020-10-27T01:13:08.6
Examining file ./1002158_g323_uvot_sky_srclist.fits
The exposure ID is 625453988
The exposure time is undefined.
The filter is U.
The uvot region is centered at (155.9783,-5.5153) with a roll angle of 101.9
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 (155.9740,-5.5150) with a radius of 3.000 arc min
This is 0.257 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 (155.9698,-5.5100) with a radius of 0.030 arc min
This is 0.600 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 1002158
find_uvot_ag.pl vrs. 2017-02-17 fem started at 201027d11h16m26s394199usUT
Observation start time is 2020-10-27T01:13:08.6
Examining file ./1002158_g323_uvot_catalog_srclist.fits
The exposure ID is 625453988
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 46 detected source(s) for 1002158_g323
Aspect correction adds 0.00169 degrees (0.407 sec of time = 6.07 arc sec) to RA
Aspect correction adds -0.00101 degrees (-3.62 arcsec) to Dec
Total aspect correction is 7.07 arcsec
Star catalogs centered at 155.9867 , -5.5122 with radius 8.59 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 36 matched entries is 0.647" for 1002158_g323
Mean and std. dev of mag. difference (MAG_DELTA) are 1.642 and 0.521 for 1002158_g323
Found 10 entries without IDs and 7 entries that are acceptable afterglow candidates for 1002158_g323.
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=155.9740 (10:23:53.76) DEC=-5.5150 (-05:30:54.0)
XRT distances are from RA=155.9698 (10:23:52.74) DEC=-5.5100 (-05:30:36.1)
-----------------
Entry 4 in the list of sources is a candidate afterglow for 1002158_g323 with 3x3 stamp
ra=155.96194 (10:23:50.87) dec=-5.48799 (-05:29:16.8) +/- 1.1" mag=19.29+/-0.35
dist=84.1 REFID=46
*** The position of this source is inconsistent with the XRT position.
The position is 106.4 arc sec from the BAT position.
src: 4 distr. of nearby unmatched sources: 0 0 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 6 in the list of sources is a candidate afterglow for 1002158_g323 with 5x5 stamp
ra=156.01301 (10:24:03.12) dec=-5.50016 (-05:30:00.6) +/- 1.1" mag=18.58+/-0.35
dist=159.0 REFID=35
*** The position of this source is inconsistent with the XRT position.
The position is 149.7 arc sec from the BAT position.
src: 6 distr. of nearby unmatched sources: 0 2 4 1 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 7 in the list of sources is a candidate afterglow for 1002158_g323 with 5x5 stamp
ra=156.01282 (10:24:03.08) dec=-5.49852 (-05:29:54.7) +/- 1.1" mag=18.61+/-0.35
dist=159.8 REFID=37
*** The position of this source is inconsistent with the XRT position.
The position is 151.2 arc sec from the BAT position.
src: 7 distr. of nearby unmatched sources: 1 1 4 1 1
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 8 in the list of sources is a candidate afterglow for 1002158_g323 with 5x5 stamp
ra=156.01355 (10:24:03.25) dec=-5.49770 (-05:29:51.7) +/- 1.1" mag=18.44+/-0.35
dist=163.1 REFID=33
*** The position of this source is inconsistent with the XRT position.
The position is 154.8 arc sec from the BAT position.
src: 8 distr. of nearby unmatched sources: 1 4 1 0 2
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 12 in the list of sources is a candidate afterglow for 1002158_g323 with 5x5 stamp
ra=156.01638 (10:24:03.93) dec=-5.49969 (-05:29:58.9) +/- 1.1" mag=17.94+/-0.35
dist=171.2 REFID=29
*** The position of this source is inconsistent with the XRT position.
The position is 161.6 arc sec from the BAT position.
src: 12 distr. of nearby unmatched sources: 3 0 4 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 13 in the list of sources is a candidate afterglow for 1002158_g323 with 3x3 stamp
ra=156.01845 (10:24:04.43) dec=-5.53373 (-05:32:01.4) +/- 1.1" mag=19.17+/-0.35
dist=194.2 REFID=45
*** The position of this source is inconsistent with the XRT position.
The position is 173.0 arc sec from the BAT position.
src: 13 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
-----------------
Entry 14 in the list of sources is a candidate afterglow for 1002158_g323 with 5x5 stamp
ra=156.01955 (10:24:04.69) dec=-5.49773 (-05:29:51.8) +/- 1.1" mag=19.07+/-0.35
dist=183.9 REFID=42
*** The position of this source is inconsistent with the XRT position.
The position is 174.7 arc sec from the BAT position.
src: 14 distr. of nearby unmatched sources: 0 0 4 0 2
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 1002158
------ Start for Possible Stand-alone Circular ----
In response to GRB201027 (Swift/BAT trigger 1002158) at 01:07:44 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
298 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 100% of the
XRT error circle. The typical 3-sigma upper limit has been about 19.2 mag. 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
0.04.
------- notes for trigger 1002158 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 201027d11h16m29s483756usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1002158
-expid=625453988 -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/1002158/
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 625453988.59026 or about 2020:301:01:13:03 UT
There was likely a PROBLEM with the srclist star catalog because no stars
found. Found 46 sources in srclist catalog. Found 10 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 20.05 mag. Found 0 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 0% of the
Genie image region.
Genie image analysis:
Found 36716.8 counts in the large background region of 6176.0 pixels or a rate
of 5.945 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 19.54 mag. for a
4-arcsec aperture.
Found 1147.0 counts in the XRT position region of 201.0 pixels or a rate of
5.706 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.139 +/- 0.146 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.439 cps or 19.27 mag. The closest srclist
source has ra= 155.9723 dec= -5.5249 mag=16.20 sep=54.33". The closest Genie
source has ra= 155.9723 dec= -5.5250 mag=15.88 sep=54.48".
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?
625453988 297 U srclist found no candidates.
625453988 297 U image found no candidates.
List afterglow candidates for other finding charts.
625453776 85 WHITE srclist found no candidates.
625453776 85 WHITE image found no candidates.
625454569 878 WHITE srclist found no candidates.
625454569 878 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -5.51003
GRB_ERROR: 5
GRB_RA: 155.96975
IMAGE_START_TIME: 01:13:03
MAGNITUDE: 19.3
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT