image overlap message for exposure 2 of trigger 1003002
uvot_overlap.pl vrs. 2010-12-20b fem started at 201029d22h07m53s331332usUT
The observation of trigger 1003002 started 2020-10-29T20:25:05.0
Examining file ./1003002_g314_uvot_sky_image.fits
The exposure ID is 625695905
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (229.5832,44.4553) with a roll angle of 197.0
It is square with sides of 2.68 arc min. for an area of 7.17 sq arc min
The BAT error circle is centered at (229.6010,44.4640) with a radius of 3.000 arc min
This is 0.922 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 7.17 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (229.5816,44.4593) with a radius of 0.028 arc min
This is 0.249 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
image afterglow message for exposure 2 of trigger 1003002
find_uvot_ag.pl vrs. 2020-10-29 fem started at 201029d22h08m04s274658usUT
Observation start time is 2020-10-29T20:25:05.0
Examining file ./1003002_g314_uvot_catalog_image.fits
The exposure ID is 625695905
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 4 detected source(s) for 1003002_g314
Aspect correction adds -0.00081 degrees (-0.194 sec of time = -2.08 arc sec) to RA
Aspect correction adds -0.00103 degrees (-3.70 arcsec) to Dec
Total aspect correction is 4.25 arcsec
Star catalogs centered at 229.5831 , 44.4484 with radius 2.54 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 2 matched entries is 0.454" for 1003002_g314
Mean and std. dev of mag. difference (MAG_DELTA) are 0.924 and 0.536 for 1003002_g314
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 1003002_g314.
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=229.6010 (15:18:24.24) DEC=44.4640 (+44:27:50.4)
XRT distances are from RA=229.5816 (15:18:19.58) DEC=44.4593 (+44:27:33.4)
*** WARNING 50 per cent of entries have no IDs.
-----------------
Entry 2 in the list of sources is a candidate afterglow for 1003002_g314 with genie
ra=229.58758 (15:18:21.02) dec=44.43527 (+44:26:07.0) +/- 1.4" mag=20.79+/-0.42
dist=87.8 REFID=4 major=1.1 minor=1.0 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 109.0 arc sec from the BAT position.
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 1003002_g314 with genie
ra=229.58255 (15:18:19.81) dec=44.42488 (+44:25:29.6) +/- 0.9" mag=19.54+/-0.21
dist=123.9 REFID=1 major=0.7 minor=0.3 flag=16 (aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 148.6 arc sec from the BAT position.
This source is near the edge of image (0.954)
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable minor profile of 0.3
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 16669.852 counts in the bkg source region of 6102.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 2.732 counts/pixel (5-sig UL in 4" is 19.92 mag) for 1003002_g314
There are 549.04730 counts in the xrt source region of 202.00000 pixels.
Rate in xrt region with 8 arcsec radius is 2.718 counts/pixel for 1003002_g314
There are 3451.4993 counts in the xrt_bkg source region of 1245.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 2.772 counts/pixel (5-sig UL in 4" is 19.91 mag) for 1003002_g314
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.47, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1003002_625695905_201029d22h08m04s274658usUT_bkg.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(229.5832,44.4553,45")
fk5;-circle(229.591943838154,44.4539465881924,6")
fk5;-circle(229.585197286692,44.4438613841817,6")
Region file: 1003002_625695905_201029d22h08m04s274658usUT_xrt.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(229.58158,44.45928,8")
Region file: 1003002_625695905_201029d22h08m04s274658usUT_xrt_bkg.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(229.58158,44.45928,25")
fk5;-circle(229.58158,44.45928,15")
image paragraph message for exposure 2 of trigger 1003002
------ Start for Possible Stand-alone Circular ----
In response to GRB201029 (Swift/BAT trigger 1003002) at 20:19:50 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
289 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
0.02.
------- notes for trigger 1003002 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 201029d22h08m08s087526usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1003002
-expid=625695905 -meonly -msg_image
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/1003002/
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 625695905.0393 or about 2020:303:20:25:00 UT
There was likely a PROBLEM with the srclist star catalog because no stars
found. Found 15 sources in srclist catalog. Found 2 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 4 source(s) in Genie image catalog. Found 2 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.47 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 16669.9 counts in the large background region of 6102.0 pixels or a rate
of 2.732 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 19.77 mag. for a
4-arcsec aperture.
Found 549.0 counts in the XRT position region of 202.0 pixels or a rate of
2.718 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.044 +/- 0.101 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.304 cps or 19.49 mag. The closest srclist
source has ra= 229.5820 dec= 44.4243 mag=16.91 sep=125.84". The closest Genie
source has ra= 229.5919 dec= 44.4539 mag=19.03 sep=32.83".
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?
625695905 289 U srclist found no candidates.
625695905 289 U image found no candidates.
List afterglow candidates for other finding charts.
625695747 131 WHITE srclist found no candidates.
625695747 131 WHITE image found no candidates.
625696483 867 WHITE srclist found no candidates.
625696483 867 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 44.45928
GRB_ERROR: 5
GRB_RA: 229.58158
IMAGE_START_TIME: 20:25:00
MAGNITUDE: 19.5
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT