image overlap message for exposure 1 of trigger 1114148
uvot_overlap.pl vrs. 2010-12-20b fem started at 220702d02h27m09s460763usUT
The observation of trigger 1114148 started 2022-07-02T02:09:08.8
Examining file 1114148_g961_uvot_sky_image.fits
The exposure ID is 678420548
The exposure time is 46.489 (seconds)
The filter is WHITE.
The uvot region is centered at (264.5667,-26.9958) with a roll angle of 258.9
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 (264.5720,-26.9640) with a radius of 3.000 arc min
This is 1.929 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 6.20 sq. arc min or 0.22 of the BAT error circle
The XRT error circle is centered at (264.5740,-26.9933) with a radius of 0.080 arc min
This is 0.420 arc min from the center of the uvot region
The area of the XRT error circle is 0.020 sq. arc min
The UVOT/XRT overlap is 0.020 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1114148
find_uvot_ag.pl vrs. 2020-10-30 fem started at 220702d02h27m15s270144usUT
Observation start time is 2022-07-02T02:09:08.8
Examining file 1114148_g961_uvot_catalog_image.fits
The exposure ID is 678420548
The exposure is 46.489 sec.
The bin size is 2 pixels
The filter is WHITE
There are 15 detected source(s) for 1114148_g961
Aspect correction adds -0.00169 degrees (-0.407 sec of time = -5.44 arc sec) to RA
Aspect correction adds 0.00016 degrees ( 0.58 arcsec) to Dec
Total aspect correction is 5.47 arcsec
Star catalogs centered at 264.5692 , -26.9964 with radius 2.66 arc min.
n_usno: 1235 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 17 matched entries is 0.706" for 1114148_g961
Mean and std. dev of mag. difference (MAG_DELTA) are 1.531 and 1.173 for 1114148_g961
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1114148_g961.
Acceptable entries have no ID, XRT distances < 12", 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=264.5720 (17:38:17.28) DEC=-26.9640 (-26:57:50.4)
XRT distances are from RA=264.5740 (17:38:17.76) DEC=-26.9933 (-26:59:35.9)
-----------------
Entry 9 in the list of sources is a candidate afterglow for 1114148_g961 with genie
ra=264.59542 (17:38:22.90) dec=-26.98659 (-26:59:11.7) +/- 0.8" mag=17.77+/-0.15
dist=72.8 REFID=5 major=0.8 minor=0.5 flag=16 (aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 110.7 arc sec from the BAT position.
This source is near the edge of image (0.971)
Found 17 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
264.5897 -26.9856 18.8 -1 USNO-B1 19.62 17.06 18.19
264.5924 -26.9878 10.8 -1 USNO-B1 99.99 19.80 99.99
264.5926 -26.9852 10.4 -1 USNO-B1 99.99 17.28 99.99
264.5911 -26.9829 19.3 -1 USNO-B1 18.88 16.51 17.56
264.5924 -26.9835 14.8 -1 USNO-B1 19.71 17.98 18.75
264.5935 -26.9846 9.5 -1 USNO-B1 19.33 16.12 17.55
264.5920 -26.9824 18.6 -1 USNO-B1 99.99 20.09 99.99
264.5963 -26.9883 6.9 -1 USNO-B1 19.56 99.99 99.99
264.5961 -26.9867 2.1 -1 USNO-B1 16.60 14.18 15.25 *
264.5946 -26.9828 14.0 -1 USNO-B1 99.99 18.59 99.99
264.5976 -26.9880 8.6 -1 USNO-B1 20.35 21.02 20.72
264.5984 -26.9884 11.5 -1 USNO-B1 99.99 25.52 99.99
264.5970 -26.9844 9.4 -1 USNO-B1 99.99 19.94 99.99
264.5953 -26.9811 19.8 -1 USNO-B1 99.99 16.54 99.99
264.5979 -26.9827 16.1 -1 USNO-B1 99.99 19.83 99.99
264.6011 -26.9879 18.9 -1 USNO-B1 19.42 16.36 17.72
264.6006 -26.9838 19.5 -1 USNO-B1 19.48 17.91 18.61
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 5 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
264.5711 -26.9929 9.4 -1 USNO-B1 99.99 22.48 99.99
264.5740 -26.9959 9.5 -1 USNO-B1 19.53 16.36 17.77
264.5731 -26.9930 3.2 -1 USNO-B1 19.51 17.37 18.32
264.5730 -26.9920 5.8 -1 USNO-B1 20.63 21.14 20.91
264.5754 -26.9935 4.6 -1 USNO-B1 99.99 19.67 99.99
The closest star is 3.20" away.
List UVOT sources within 10" of the XRT position:
There are 31476.199 counts in the bkg source region of 5749.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 5.475 counts/pixel (5-sig UL in 4" is 19.16 mag) for 1114148_g961
There are 1130.0752 counts in the xrt source region of 194.00000 pixels.
Rate in xrt region with 8 arcsec radius is 5.825 counts/pixel for 1114148_g961
There are 6199.0767 counts in the xrt_bkg source region of 1127.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 5.501 counts/pixel (5-sig UL in 4" is 19.15 mag) for 1114148_g961
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 19.71, XRT distances < 12",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1114148_678420548_220702d02h27m15s270144usUT_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(264.5667,-26.9958,45")
fk5;-circle(264.57781994076,-26.9914018435124,6")
fk5;-circle(264.571149306362,-26.9900966922772,6")
fk5;-circle(264.565110385338,-26.9949707995709,6")
fk5;-circle(264.566377859006,-26.9860810375573,6")
fk5;-circle(264.559874720989,-26.9970334704479,6")
Region file: 1114148_678420548_220702d02h27m15s270144usUT_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(264.5740,-26.9933,8")
Region file: 1114148_678420548_220702d02h27m15s270144usUT_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(264.5740,-26.9933,25")
fk5;-circle(264.5740,-26.9933,15")
fk5;-circle(264.57781994076,-26.9914018435124,6")
fk5;-circle(264.571149306362,-26.9900966922772,6")
fk5;-circle(264.565110385338,-26.9949707995709,6")
image paragraph message for exposure 1 of trigger 1114148
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
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 GRB220702 (Swift/BAT trigger 1114148) at 01:53:06 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 46 seconds with the White filter
starting 932 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 1114148 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 220702d02h27m24s015806usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1114148
-expid=678420548 -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/1114148/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for bat position. 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 678420548.81006 or about 2022:183:02:09:03 UT
Found 5000 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 96% of the srclist region. Found 90 sources in
srclist catalog. Found 18 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.58 mag.
Found 15 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 19.71 mag. Found 1231 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
120% of the Genie image region.
Genie image analysis:
Found 31476.2 counts in the large background region of 5749.0 pixels or a rate
of 5.475 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 18.97 mag. for a
4-arcsec aperture.
Found 1130.1 counts in the XRT position region of 194.0 pixels or a rate of
5.825 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 1.369 +/- 0.788 (1-sigma) cps or
19.26 mag and a range from 18.77 to 20.19 mag. The 3-sigma UL at the XRT
position is 3.733 cps or 18.17 mag. The closest srclist source has ra= 264.5776
dec= -26.9914 mag=20.40 sep=13.43". The closest Genie source has ra= 264.5778
dec= -26.9914 mag=19.61 sep=14.03".
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?
678420548 932 WHITE srclist found no candidates.
678420548 932 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------