image overlap message for exposure 3 of trigger 1061284
uvot_overlap.pl vrs. 2010-12-20b fem started at 210724d11h09m28s660559usUT
The observation of trigger 1061284 started 2021-07-23T15:01:05.6
Examining file ./1061284_g894_uvot_sky_image.fits
The exposure ID is 648745265
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (121.7194,-32.8806) with a roll angle of 1.8
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 (121.7260,-32.8890) with a radius of 3.000 arc min
This is 0.603 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 (121.7212,-32.8857) with a radius of 0.033 arc min
This is 0.318 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 3 of trigger 1061284
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210724d11h10m05s879056usUT
Observation start time is 2021-07-23T15:01:05.6
Examining file ./1061284_g894_uvot_catalog_image.fits
The exposure ID is 648745265
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 44 detected source(s) for 1061284_g894
Aspect correction adds -0.00037 degrees (-0.089 sec of time = -1.13 arc sec) to RA
Aspect correction adds 0.00097 degrees ( 3.49 arcsec) to Dec
Total aspect correction is 3.67 arcsec
Star catalogs centered at 121.7232 , -32.8823 with radius 2.68 arc min.
n_usno: 463 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 48 matched entries is 0.582" for 1061284_g894
Mean and std. dev of mag. difference (MAG_DELTA) are 0.942 and 0.429 for 1061284_g894
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 1061284_g894.
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=121.7260 (08:06:54.24) DEC=-32.8890 (-32:53:20.4)
XRT distances are from RA=121.7212 (08:06:53.08) DEC=-32.8857 (-32:53:08.5)
-----------------
Entry 27 in the list of sources is a candidate afterglow for 1061284_g894 with genie
ra=121.73754 (08:06:57.01) dec=-32.89711 (-32:53:49.6) +/- 0.6" mag=16.91+/-0.14
dist=64.3 REFID=40 major=1.0 minor=0.9 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 45.5 arc sec from the BAT position.
This source is near the edge of image (0.958)
Found 8 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
121.7371 -32.8968 1.9 -1 USNO-B1 16.57 15.30 15.87 *
121.7414 -32.8940 16.1 -1 USNO-B1 20.31 18.89 19.52
121.7336 -32.8995 14.6 -1 USNO-B1 20.29 19.40 19.80
121.7417 -32.8967 12.5 -1 USNO-B1 20.09 17.52 18.66
121.7418 -32.8966 13.1 -1 USNO-B1 19.10 17.55 18.24
121.7407 -32.8988 11.2 -1 USNO-B1 19.96 18.44 19.11
121.7404 -32.8991 11.2 -1 USNO-B1 99.99 17.34 99.99
121.7401 -32.9005 14.4 -1 USNO-B1 19.59 17.71 18.55
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" or brighter than 12 mag
-----------------
Entry 38 in the list of sources is a candidate afterglow for 1061284_g894 with genie
ra=121.73650 (08:06:56.76) dec=-32.86804 (-32:52:05.0) +/- 0.6" mag=17.12+/-0.14
dist=78.7 REFID=6 major=1.2 minor=1.0 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 81.9 arc sec from the BAT position.
Found 10 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
121.7304 -32.8691 18.7 -1 USNO-B1 20.63 19.06 19.76
121.7363 -32.8716 12.8 -1 USNO-B1 17.45 15.86 16.57
121.7360 -32.8693 4.6 -1 USNO-B1 18.77 17.61 18.13
121.7363 -32.8691 3.7 -1 USNO-B1 18.19 16.09 17.03
121.7360 -32.8683 1.7 -1 USNO-B1 16.72 14.71 15.61 *
121.7402 -32.8711 15.8 -1 USNO-B1 15.54 14.57 15.00
121.7407 -32.8706 15.6 -1 USNO-B1 99.99 16.18 99.99
121.7417 -32.8695 16.6 -1 USNO-B1 20.37 18.23 19.18
121.7402 -32.8679 11.3 -1 USNO-B1 20.20 19.04 19.56
121.7365 -32.8651 10.5 -1 USNO-B1 19.41 18.59 18.96
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 1 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
121.7190 -32.8846 7.7 -1 USNO-B1 19.43 17.89 18.57
The closest star is 7.68" away.
List UVOT sources within 10" of the XRT position:
There are 1.5440967E+05 counts in the bkg source region of 5282.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 29.233 counts/pixel (5-sig UL in 4" is 19.52 mag) for 1061284_g894
There are 5875.1514 counts in the xrt source region of 199.00000 pixels.
Rate in xrt region with 8 arcsec radius is 29.523 counts/pixel for 1061284_g894
There are 25748.754 counts in the xrt_bkg source region of 883.00000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 29.161 counts/pixel (5-sig UL in 4" is 19.52 mag) for 1061284_g894
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 20.07, 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: 1061284_648745265_210724d11h10m05s879056usUT_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(121.7194,-32.8806,45")
fk5;-circle(121.722113919796,-32.8904882870555,6")
fk5;-circle(121.718971780819,-32.8822548902125,6")
fk5;-circle(121.713104729444,-32.8857378008266,6")
fk5;-circle(121.726064176591,-32.8825250998659,6")
fk5;-circle(121.727679581123,-32.8893215288383,6")
fk5;-circle(121.712962743301,-32.893358026164,6")
fk5;-circle(121.709236916155,-32.8908027978028,6")
fk5;-circle(121.722892769038,-32.8766419669907,6")
fk5;-circle(121.713757856965,-32.8772360967568,6")
fk5;-circle(121.706487051024,-32.888247101463,6")
fk5;-circle(121.733599000224,-32.8851886505423,6")
fk5;-circle(121.703659270891,-32.8845816207266,6")
fk5;-circle(121.73564275507,-32.8790596967704,6")
fk5;-circle(121.708086766434,-32.875008858361,6")
fk5;-circle(121.726693799975,-32.8690301577349,6")
Region file: 1061284_648745265_210724d11h10m05s879056usUT_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(121.72117,-32.88569,8")
Region file: 1061284_648745265_210724d11h10m05s879056usUT_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(121.72117,-32.88569,25")
fk5;-circle(121.72117,-32.88569,15")
fk5;-circle(121.722113919796,-32.8904882870555,6")
fk5;-circle(121.718971780819,-32.8822548902125,6")
fk5;-circle(121.713104729444,-32.8857378008266,6")
fk5;-circle(121.726064176591,-32.8825250998659,6")
fk5;-circle(121.727679581123,-32.8893215288383,6")
image paragraph message for exposure 3 of trigger 1061284
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: high density of stars
SRCLIST PROBLEM: high density of stars, srclist filled telemetry buffer
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB210723 (Swift/BAT trigger 1061284) at 14:46:10 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 867 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. Because of the density of catalogued stars, further
analysis is required to report an upper limit for any afterglow in the
sub-image. The 8'x8' region for the list of sources generated on-board covers
100% of the XRT error circle. Because of the density of catalogued stars,
further analysis is required to report an upper limit for any afterglow in the
region. No correction has been made for the large, but uncertain, extinction
expected.
------- notes for trigger 1061284 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210724d11h10m11s627054usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1061284
-expid=648745265 -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/1061284/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for xrt position. XRT position found for srclist.
XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 648745265.59956 or about 2021:204:15:01:00 UT
Found 4275 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 45% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 16 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 44 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 20.07 mag. Found 459 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
44% of the Genie image region.
Genie image analysis:
Found 154409.7 counts in the large background region of 5282.0 pixels or a rate
of 29.233 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 19.34 mag. for a
4-arcsec aperture.
Found 5875.2 counts in the XRT position region of 199.0 pixels or a rate of
29.524 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.482 +/- 0.565 (1-sigma) cps or
20.40 mag and a range from 19.55 to 99.99 mag. The 3-sigma UL at the XRT
position is 2.177 cps or 18.76 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.18 mag. The closest
srclist source has ra= 121.7129 dec= -32.8858 mag=17.17 sep=25.11". The closest
Genie source has ra= 121.7190 dec= -32.8822 mag=17.24 sep=14.04".
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?
648745265 866 WHITE srclist found no candidates.
648745265 866 WHITE image found no candidates.
List afterglow candidates for other finding charts.
648744497 98 WHITE srclist found no candidates.
648744497 98 WHITE image found no candidates.
648744710 311 U srclist found no candidates.
648744710 311 U image found no candidates.
------- Tokens for Quick GCN -------