image overlap message for exposure 1 of trigger 1011980
uvot_overlap.pl vrs. 2010-12-20b fem started at 201209d09h35m29s495733usUT
The observation of trigger 1011980 started 2020-12-09T05:47:19.8
Examining file ./1011980_g146_uvot_sky_image.fits
The exposure ID is 629185639
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (23.0858,-1.7583) with a roll angle of 241.3
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 (23.1060,-1.7630) with a radius of 3.000 arc min
This is 1.247 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 (23.0907,-1.7547) with a radius of 0.028 arc min
This is 0.367 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 1 of trigger 1011980
find_uvot_ag.pl vrs. 2020-10-30 fem started at 201209d09h35m56s501957usUT
Observation start time is 2020-12-09T05:47:19.8
Examining file ./1011980_g146_uvot_catalog_image.fits
The exposure ID is 629185639
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 3 detected source(s) for 1011980_g146
Aspect correction adds 0.00001 degrees (0.001 sec of time = 0.02 arc sec) to RA
Aspect correction adds -0.00134 degrees (-4.83 arcsec) to Dec
Total aspect correction is 4.83 arcsec
Star catalogs centered at 23.0850 , -1.7577 with radius 2.35 arc min.
n_usno: 81 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 2 matched entries is 0.201" for 1011980_g146
Mean and std. dev of mag. difference (MAG_DELTA) are 2.087 and 1.129 for 1011980_g146
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1011980_g146.
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=23.1060 (01:32:25.44) DEC=-1.7630 (-01:45:46.8)
XRT distances are from RA=23.0907 (01:32:21.77) DEC=-1.7547 (-01:45:16.8)
*** WARNING 33 per cent of entries have no IDs.
-----------------
Entry 1 in the list of sources is a candidate afterglow for 1011980_g146 with genie
ra=23.09946 (01:32:23.87) dec=-1.77472 (-01:46:29.0) +/- 1.1" mag=21.14+/-0.32
dist=78.7 REFID=1 major=1.2 minor=0.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 48.3 arc sec from the BAT position.
Found 3 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
23.0991 -1.7748 1.4 -1 USNO-B1 19.97 19.80 19.88 *
23.0960 -1.7775 16.0 -1 USNO-B1 20.72 20.15 20.40
23.0963 -1.7778 15.9 -1 USNO-B1 22.02 19.77 20.77
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 62362.648 counts in the bkg source region of 6192.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 10.071 counts/pixel (5-sig UL in 4" is 20.10 mag) for 1011980_g146
There are 2040.8090 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 10.204 counts/pixel for 1011980_g146
There are 12690.077 counts in the xrt_bkg source region of 1241.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 10.226 counts/pixel (5-sig UL in 4" is 20.09 mag) for 1011980_g146
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 20.65, 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: 1011980_629185639_201209d09h35m56s501957usUT_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(23.0858,-1.7583,45")
fk5;-circle(23.0831785405357,-1.75146718874539,6")
Region file: 1011980_629185639_201209d09h35m56s501957usUT_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(23.09071,-1.75467,8")
Region file: 1011980_629185639_201209d09h35m56s501957usUT_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(23.09071,-1.75467,25")
fk5;-circle(23.09071,-1.75467,15")
fk5;-circle(23.0831785405357,-1.75146718874539,6")
image paragraph message for exposure 1 of trigger 1011980
------ Start for Possible Stand-alone Circular ----
In response to GRB201209 (Swift/BAT trigger 1011980) at 05:44:52 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 121 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 19.6 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 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.04.
------- notes for trigger 1011980 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 201209d09h36m01s257872usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1011980
-expid=629185639 -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/1011980/
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 629185639.81712 or about 2020:344:05:47:14 UT
Found 369 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 9% of the srclist region. Found 14 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
19.22 mag.
Found 3 source(s) in Genie image catalog. Found 1 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.65 mag. Found 77 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 9% of the
Genie image region.
Genie image analysis:
Found 62362.6 counts in the large background region of 6192.0 pixels or a rate
of 10.071 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 19.92 mag. for a
4-arcsec aperture.
Found 2040.8 counts in the XRT position region of 200.0 pixels or a rate of
10.204 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.029 +/- 0.325 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.974 cps or 19.63 mag. The closest srclist
source has ra= 23.0833 dec= -1.7514 mag=19.07 sep=29.13". The closest Genie
source has ra= 23.0832 dec= -1.7515 mag=17.69 sep=29.45".
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?
629185639 120 WHITE srclist found no candidates.
629185639 120 WHITE image found no candidates.
List afterglow candidates for other finding charts.
629185852 333 U srclist found no candidates.
629185852 333 U image found no candidates.
629186381 862 WHITE srclist found no candidates.
629186381 862 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -1.75467
GRB_ERROR: 5
GRB_RA: 23.09071
IMAGE_START_TIME: 05:47:14
MAGNITUDE: 19.6
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT