image overlap message for exposure 1 of trigger 1115766
uvot_overlap.pl vrs. 2010-12-20b fem started at 220712d02h12m39s857413usUT
The observation of trigger 1115766 started 2022-07-11T18:18:51.5
Examining file ./1115766_g142_uvot_sky_image.fits
The exposure ID is 679256331
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (262.0168,24.6822) with a roll angle of 326.5
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 (261.9930,24.6690) with a radius of 3.000 arc min
This is 1.518 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 7.01 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (262.0190,24.6810) with a radius of 0.035 arc min
This is 0.143 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
image afterglow message for exposure 1 of trigger 1115766
find_uvot_ag.pl vrs. 2020-10-30 fem started at 220712d02h12m45s249623usUT
Observation start time is 2022-07-11T18:18:51.5
Examining file ./1115766_g142_uvot_catalog_image.fits
The exposure ID is 679256331
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 17 detected source(s) for 1115766_g142
Aspect correction adds -0.00136 degrees (-0.325 sec of time = -4.44 arc sec) to RA
Aspect correction adds 0.00183 degrees ( 6.57 arcsec) to Dec
Total aspect correction is 7.93 arcsec
Star catalogs centered at 262.0165 , 24.6780 with radius 2.42 arc min.
n_usno: 96 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 17 matched entries is 0.447" for 1115766_g142
Mean and std. dev of mag. difference (MAG_DELTA) are 0.706 and 0.245 for 1115766_g142
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1115766_g142.
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.
Magnitude criteria will be applied later.
BAT distances are from RA=261.9930 (17:27:58.32) DEC=24.6690 (+24:40:08.4)
XRT distances are from RA=262.0190 (17:28:04.56) DEC=24.6810 (+24:40:51.5)
-----------------
Entry 17 in the list of sources is a candidate afterglow for 1115766_g142 with genie
ra=261.99216 (17:27:58.12) dec=24.68669 (+24:41:12.1) +/- 0.7" mag=19.84+/-0.17
dist=90.2 REFID=7 major=1.4 minor=0.7 flag=16 (aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 60.2 arc sec from the BAT position.
This source is near the edge of image (1.011)
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
261.9963 24.6875 13.9 -1 USNO-B1 20.03 19.49 19.73
261.9933 24.6842 9.8 -1 USNO-B1 17.26 15.75 16.42
261.9912 24.6867 3.2 -1 USNO-B1 18.08 16.88 17.42 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" 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 32535.406 counts in the bkg source region of 5574.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 5.837 counts/pixel (5-sig UL in 4" is 20.39 mag) for 1115766_g142
There are 1181.0341 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 5.905 counts/pixel for 1115766_g142
There are 6844.1421 counts in the xrt_bkg source region of 1181.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 5.795 counts/pixel (5-sig UL in 4" is 20.40 mag) for 1115766_g142
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 20.95, XRT distances < 5.25",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1115766_679256331_220712d02h12m45s249623usUT_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(262.0168,24.6822,45")
fk5;-circle(262.015049835779,24.6817645486017,6")
fk5;-circle(262.025819066781,24.6854397350766,6")
fk5;-circle(262.029312725985,24.6823330427234,6")
fk5;-circle(262.006716823931,24.6787289518809,6")
fk5;-circle(262.010330850907,24.6876889388933,6")
fk5;-circle(262.00576544567,24.6750019469123,6")
fk5;-circle(262.023861747813,24.6934336731659,6")
fk5;-circle(262.014083069048,24.6931750488619,6")
Region file: 1115766_679256331_220712d02h12m45s249623usUT_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(262.01900,24.68097,8")
Region file: 1115766_679256331_220712d02h12m45s249623usUT_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(262.01900,24.68097,25")
fk5;-circle(262.01900,24.68097,15")
fk5;-circle(262.015049835779,24.6817645486017,6")
fk5;-circle(262.025819066781,24.6854397350766,6")
image paragraph message for exposure 1 of trigger 1115766
------ Start for Possible Stand-alone Circular ----
In response to GRB220711 (Swift/BAT trigger 1115766) at 18:16:28 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 113 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
0.067.
------- notes for trigger 1115766 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 220712d02h12m50s508671usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1115766
-expid=679256331 -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/1115766/
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 679256331.47936 or about 2022:192:18:18:46 UT
Found 634 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 10% of the srclist region. Found 92 sources in
srclist catalog. Found 4 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 17 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 20.95 mag. Found 92 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
10% of the Genie image region.
Genie image analysis:
Found 32535.4 counts in the large background region of 5574.0 pixels or a rate
of 5.837 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 20.22 mag. for a
4-arcsec aperture.
Found 1181.0 counts in the XRT position region of 200.0 pixels or a rate of
5.905 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.146 +/- 0.247 (1-sigma) cps or
21.69 mag and a range from 20.62 to 99.99 mag. The 3-sigma UL at the XRT
position is 0.889 cps or 19.73 mag. The closest srclist source has ra= 262.0151
dec= 24.6816 mag=18.62 sep=12.98". The closest Genie source has ra= 262.0150
dec= 24.6818 mag=18.06 sep=13.23".
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?
679256331 112 WHITE srclist found no candidates.
679256331 112 WHITE image found no candidates.
List afterglow candidates for other finding charts.
679256543 324 U srclist found no candidates.
679256543 324 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 24.68097
GRB_ERROR: 5.25
GRB_RA: 262.01900
IMAGE_START_TIME: 18:18:46
MAGNITUDE: 19.7
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT