image overlap message for exposure 1 of trigger 1101053
uvot_overlap.pl vrs. 2010-12-20b fem started at 220404d07h09m21s514021usUT
The observation of trigger 1101053 started 2022-04-03T20:44:56.8
Examining file ./1101053_g133_uvot_sky_image.fits
The exposure ID is 670711496
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (191.3740,89.1889) with a roll angle of 357.9
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 (191.0250,89.1700) with a radius of 3.000 arc min
This is 1.171 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 (191.4734,89.1846) with a radius of 0.058 arc min
This is 0.270 arc min from the center of the uvot region
The area of the XRT error circle is 0.011 sq. arc min
The UVOT/XRT overlap is 0.011 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1101053
find_uvot_ag.pl vrs. 2020-10-30 fem started at 220404d07h09m25s184722usUT
Observation start time is 2022-04-03T20:44:56.8
Examining file ./1101053_g133_uvot_catalog_image.fits
The exposure ID is 670711496
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 8 detected source(s) for 1101053_g133
Aspect correction adds 0.00209 degrees (0.501 sec of time = 0.11 arc sec) to RA
Aspect correction adds 0.00147 degrees ( 5.30 arcsec) to Dec
Total aspect correction is 5.31 arcsec
Star catalogs centered at 191.6338 , 89.1893 with radius 2.58 arc min.
n_usno: 77 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 8 matched entries is 0.439" for 1101053_g133
Mean and std. dev of mag. difference (MAG_DELTA) are 1.102 and 0.477 for 1101053_g133
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1101053_g133.
Acceptable entries have no ID, XRT distances < 8.75", 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=191.0250 (12:44:06.00) DEC=89.1700 (+89:10:12.0)
XRT distances are from RA=191.4734 (12:45:53.62) DEC=89.1846 (+89:11:04.6)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1101053_g133 with genie
ra=191.47207 (12:45:53.30) dec=89.18518 (+89:11:06.6) +/- 0.7" mag=19.80+/-0.17
dist=2.0 REFID=7 major=0.9 minor=0.9 flag=0
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)
uvot_check_outside found 12 of 12 good pixels
##### This source remains a candidate #####
It has no entries 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:
Unmatched source ra=191.47207 (12:45:53.30) dec=89.18518 (+89:11:06.6) +/- 0.7" mag=19.80+/-0.17 dist=2.0 REFID=7 flag=0
There are 41492.375 counts in the bkg source region of 6198.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 6.694 counts/pixel (5-sig UL in 4" is 20.32 mag) for 1101053_g133
There are 496.10910 counts in the src source region of 50.000000 pixels.
Rate in src region with 4 arcsec radius is 9.922 counts/pixel for 1101053_g133
There are 8438.9453 counts in the cand_src_bkg source region of 1247.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 6.767 counts/pixel (5-sig UL in 4" is 20.31 mag) for 1101053_g133
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 20.87, XRT distances < 8.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
Region file: 1101053_670711496_220404d07h09m25s184722usUT_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(191.3740,89.1889,45")
fk5;-circle(191.472069493059,89.1851755711892,6")
Region file: 1101053_670711496_220404d07h09m25s184722usUT_cand_src.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(191.472069493059,89.1851755711892,4")
Region file: 1101053_670711496_220404d07h09m25s184722usUT_cand_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(191.472069493059,89.1851755711892,25")
fk5;-circle(191.472069493059,89.1851755711892,15")
image paragraph message for exposure 1 of trigger 1101053
------ Start for Possible Stand-alone Circular ----
In response to GRB220403 (Swift/BAT trigger 1101053) at 20:42:42 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 105 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 12:45:53.30 = 191.47207
DEC(J2000) = +89:11:06.6 = 89.18518
with a 90%-confidence error radius of about 0.67 arc sec. This position is 2.0
arc sec. from the center of the XRT error circle. The estimated magnitude is
19.80 with a 1-sigma error of about 0.17. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.208.
------- notes for trigger 1101053 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 220404d07h09m29s193437usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1101053
-expid=670711496 -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/1101053/
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 670711496.83198 or about 2022:093:20:44:51 UT
Found 386 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 75 sources in
srclist catalog. Found 33 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 8 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 1 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.87 mag. Found 73 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 7% of the Genie image region. The
closest srclist source has ra= 192.5674 dec= 89.1963 mag=18.37 sep=69.44".
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?
670711496 104 WHITE srclist found no candidates.
670711496 104 WHITE 191.47207 89.18518 19.80/20.9 2.0 image Yes
List afterglow candidates for other finding charts.
670711709 317 U srclist found no candidates.
670711709 317 U 191.46643 89.18513 20.79/20.7 5.1 image Yes
670712265 873 WHITE srclist found no candidates.
670712265 873 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 89.18518
GRB_ERROR: 0.67
GRB_RA: 191.47207
IMAGE_START_TIME: 20:44:51
MAGNITUDE: 19.80
MAG_ERROR: 0.17
MESSAGE_TYPE: ACK
SOURCE: XRT