image overlap message for exposure 1 of trigger 1088376
uvot_overlap.pl vrs. 2010-12-20b fem started at 211208d00h03m37s478142usUT
The observation of trigger 1088376 started 2021-12-07T20:54:49.0
Examining file ./1088376_g112_uvot_sky_image.fits
The exposure ID is 660603289
The exposure time is 149.824 (seconds)
The filter is WHITE.
The uvot region is centered at (149.6289,-24.3547) with a roll angle of 116.8
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 (149.6250,-24.3520) with a radius of 3.000 arc min
This is 0.265 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 (149.6238,-24.3597) with a radius of 0.038 arc min
This is 0.409 arc min from the center of the uvot region
The area of the XRT error circle is 0.005 sq. arc min
The UVOT/XRT overlap is 0.005 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1088376
find_uvot_ag.pl vrs. 2020-10-30 fem started at 211208d00h03m44s021914usUT
Observation start time is 2021-12-07T20:54:49.0
Examining file ./1088376_g112_uvot_catalog_image.fits
The exposure ID is 660603289
The exposure is 149.824 sec.
The bin size is 2 pixels
The filter is WHITE
There are 14 detected source(s) for 1088376_g112
Aspect correction adds -0.00014 degrees (-0.033 sec of time = -0.46 arc sec) to RA
Aspect correction adds 0.00090 degrees ( 3.24 arcsec) to Dec
Total aspect correction is 3.27 arcsec
Star catalogs centered at 149.6305 , -24.3548 with radius 2.48 arc min.
n_usno: 94 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 8.07252
RA DEC Mag Color
bright star 0: 149.64403 (09:58:34.57) -24.33615 (-24:20:10.1) 8.07 USNO-V
Mean distance difference (CAT_DELTA) for 11 matched entries is 0.209" for 1088376_g112
Mean and std. dev of mag. difference (MAG_DELTA) are 1.054 and 0.408 for 1088376_g112
Found 3 entries without IDs and 1 entries that are acceptable afterglow candidates for 1088376_g112.
Acceptable entries have no ID, XRT distances < 5.75", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
2 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=149.6250 (09:58:30.00) DEC=-24.3520 (-24:21:07.2)
XRT distances are from RA=149.6238 (09:58:29.71) DEC=-24.3597 (-24:21:34.8)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1088376_g112 with genie
ra=149.62408 (09:58:29.78) dec=-24.35863 (-24:21:31.1) +/- 0.6" mag=17.45+/-0.14
dist=3.9 REFID=9 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 13 of 13 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=149.62408 (09:58:29.78) dec=-24.35863 (-24:21:31.1) +/- 0.6" mag=17.45+/-0.14 dist=3.9 REFID=9 flag=0
There are 71302.172 counts in the bkg source region of 5930.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 12.024 counts/pixel (5-sig UL in 4" is 20.00 mag) for 1088376_g112
There are 2011.3423 counts in the src source region of 51.000000 pixels.
Rate in src region with 4 arcsec radius is 39.438 counts/pixel for 1088376_g112
There are 14887.788 counts in the cand_src_bkg source region of 1246.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 11.948 counts/pixel (5-sig UL in 4" is 20.00 mag) for 1088376_g112
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 20.55, XRT distances < 5.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
Region file: 1088376_660603289_211208d00h03m44s021914usUT_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(149.6289,-24.3547,45")
fk5;-circle(149.624078235853,-24.3586309229848,6")
fk5;-circle(149.633956933206,-24.36437845015,6")
fk5;-circle(149.622168554863,-24.3670260980783,6")
fk5;-circle(149.637922756602,-24.3617537584353,6")
fk5;-circle(149.629841895016,-24.3673434621095,6")
Region file: 1088376_660603289_211208d00h03m44s021914usUT_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(149.624078235853,-24.3586309229848,4")
Region file: 1088376_660603289_211208d00h03m44s021914usUT_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(149.624078235853,-24.3586309229848,25")
fk5;-circle(149.624078235853,-24.3586309229848,15")
fk5;-circle(149.622168554863,-24.3670260980783,6")
image paragraph message for exposure 1 of trigger 1088376
------ Start for Possible Stand-alone Circular ----
In response to GRB211207 (Swift/BAT trigger 1088376) at 20:52:56 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 84 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 09:58:29.78 = 149.62408
DEC(J2000) = -24:21:31.1 = -24.35863
with a 90%-confidence error radius of about 0.62 arc sec. This position is 3.9
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.45 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.050.
------- notes for trigger 1088376 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 211208d00h03m50s181557usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1088376
-expid=660603289 -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/1088376/
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 660603289.01586 or about 2021:341:20:54:44 UT
Found 340 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 132 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 14 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 3 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.55 mag. Found 90 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 10% 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?
660603289 84 WHITE 149.62419 -24.35877 18.12/19.2 3.5 srclist Yes
660603289 84 WHITE 149.62408 -24.35863 17.45/20.6 3.9 image Yes
List afterglow candidates for other finding charts.
660603501 296 U 149.62412 -24.35901 18.21/18.1 2.8 srclist Yes
660603501 296 U 149.62399 -24.35872 18.16/20.2 3.9 image Yes
660604080 875 WHITE srclist found no candidates.
660604080 875 WHITE 149.62399 -24.35858 19.74/20.4 4.3 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -24.35863
GRB_ERROR: 0.62
GRB_RA: 149.62408
IMAGE_START_TIME: 20:54:44
MAGNITUDE: 17.45
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT