image overlap message for exposure 3 of trigger 1061223
uvot_overlap.pl vrs. 2010-12-20b fem started at 210722d21h17m30s999563usUT
The observation of trigger 1061223 started 2021-07-22T21:09:29.5
Examining file 1061223_g886_uvot_sky_image.fits
The exposure ID is 648680969
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (27.0339,-6.3439) with a roll angle of 70.5
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 (27.0230,-6.3540) with a radius of 3.000 arc min
This is 0.888 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 (27.0303,-6.3475) with a radius of 0.032 arc min
This is 0.304 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 1061223
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210722d21h17m32s563728usUT
Observation start time is 2021-07-22T21:09:29.5
Examining file 1061223_g886_uvot_catalog_image.fits
The exposure ID is 648680969
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 3 detected source(s) for 1061223_g886
Aspect correction adds 0.00119 degrees (0.285 sec of time = 4.25 arc sec) to RA
Aspect correction adds -0.00146 degrees (-5.27 arcsec) to Dec
Total aspect correction is 6.77 arcsec
Star catalogs centered at 27.0310 , -6.3412 with radius 2.67 arc min.
n_usno: 58 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 2 matched entries is 0.731" for 1061223_g886
Mean and std. dev of mag. difference (MAG_DELTA) are 1.182 and 0.106 for 1061223_g886
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1061223_g886.
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=27.0230 (01:48:05.52) DEC=-6.3540 (-06:21:14.4)
XRT distances are from RA=27.0303 (01:48:07.27) DEC=-6.3475 (-06:20:51.0)
*** WARNING 33 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1061223_g886 with genie
ra=27.03027 (01:48:07.26) dec=-6.34717 (-06:20:49.8) +/- 0.7" mag=14.78+/-0.14
dist=1.2 REFID=3 major=1.0 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=27.03027 (01:48:07.26) dec=-6.34717 (-06:20:49.8) +/- 0.7" mag=14.78+/-0.14 dist=1.2 REFID=3 flag=0
There are 1.2349542E+05 counts in the bkg source region of 6202.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 19.912 counts/pixel (5-sig UL in 4" is 19.73 mag) for 1061223_g886
There are 10180.741 counts in the src source region of 50.000000 pixels.
Rate in src region with 4 arcsec radius is 203.615 counts/pixel for 1061223_g886
There are 25454.762 counts in the cand_src_bkg source region of 1247.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 20.413 counts/pixel (5-sig UL in 4" is 19.71 mag) for 1061223_g886
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 20.28, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
Region file: 1061223_648680969_210722d21h17m32s563728usUT_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(27.0339,-6.3439,45")
fk5;-circle(27.0302707884883,-6.3471725383864,6")
Region file: 1061223_648680969_210722d21h17m32s563728usUT_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(27.0302707884883,-6.3471725383864,4")
Region file: 1061223_648680969_210722d21h17m32s563728usUT_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(27.0302707884883,-6.3471725383864,25")
fk5;-circle(27.0302707884883,-6.3471725383864,15")
image paragraph message for exposure 3 of trigger 1061223
------ Start for Possible Stand-alone Circular ----
In response to GRB210722 (Swift/BAT trigger 1061223) at 20:54:42 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 860 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 01:48:07.26 = 27.03027
DEC(J2000) = -06:20:49.8 = -6.34717
with a 90%-confidence error radius of about 0.74 arc sec. This position is 1.2
arc sec. from the center of the XRT error circle. The estimated magnitude is
14.78 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.027.
------- notes for trigger 1061223 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210722d21h17m34s992465usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1061223
-expid=648680969 -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/1061223/
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 648680969.48692 or about 2021:203:21:09:24 UT
Found 327 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 3% of the srclist region. Found 27 sources in
srclist catalog. Found 1 srclist source(s) without IDs. There are 1 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
Found 3 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
20.28 mag. Found 54 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 5% of the Genie image region.
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?
648680969 859 WHITE 27.03035 -6.34730 15.46/19.2 0.7 srclist Yes
648680969 859 WHITE 27.03027 -6.34717 14.78/20.3 1.2 image Yes
List afterglow candidates for other finding charts.
648680203 93 WHITE 27.03033 -6.34715 14.58/19.2 1.2 srclist Yes
648680203 93 WHITE 27.03028 -6.34718 14.37/20.6 1.0 image Yes
648680417 307 U srclist found no candidates.
648680417 307 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -6.34717
GRB_ERROR: 0.74
GRB_RA: 27.03027
IMAGE_START_TIME: 21:09:24
MAGNITUDE: 14.78
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT