image overlap message for exposure 1 of trigger 1053220
uvot_overlap.pl vrs. 2010-12-20b fem started at 210603d10h05m18s223938usUT
The observation of trigger 1053220 started 2021-06-03T09:47:54.1
Examining file 1053220_g127_uvot_sky_image.fits
The exposure ID is 644406474
The exposure time is 61.007 (seconds)
The filter is WHITE.
The uvot region is centered at (238.8184,-54.0540) with a roll angle of 202.0
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 (238.8190,-54.0460) with a radius of 3.000 arc min
This is 0.481 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
Could not find the location of an XRT error circle
image afterglow message for exposure 1 of trigger 1053220
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210603d10h05m19s701734usUT
Observation start time is 2021-06-03T09:47:54.1
Examining file 1053220_g127_uvot_catalog_image.fits
The exposure ID is 644406474
The exposure is 61.007 sec.
The bin size is 2 pixels
The filter is WHITE
There are 52 detected source(s) for 1053220_g127
Aspect correction adds 0.00054 degrees (0.131 sec of time = 1.15 arc sec) to RA
Aspect correction adds -0.00083 degrees (-2.98 arcsec) to Dec
Total aspect correction is 3.19 arcsec
Star catalogs centered at 238.8149 , -54.0545 with radius 2.74 arc min.
n_usno: 449 n_gsc: 0
*** WARNING -- bright star catalog has 3 entries brighter than 12 mag
The brightest has mag 10.71494
RA DEC Mag Color
bright star 0: 238.80655 (15:55:13.57) -54.06409 (-54:03:50.7) 11.70 USNO-R
bright star 1: 238.79818 (15:55:11.56) -54.07666 (-54:04:36.0) 10.71 USNO-V
bright star 2: 238.85814 (15:55:25.95) -54.07434 (-54:04:27.6) 11.40 USNO-V
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 43 matched entries is 0.734" for 1053220_g127
Mean and std. dev of mag. difference (MAG_DELTA) are 1.563 and 0.576 for 1053220_g127
Found 10 entries without IDs and 6 entries that are acceptable afterglow candidates for 1053220_g127.
Acceptable entries have no ID, BAT distance < 200" or XRT distance < 10", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
4 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=238.8190 (15:55:16.56) DEC=-54.0460 (-54:02:45.6)
XRT distances are as reported in catalog file.
-----------------
Entry 7 in the list of sources is a candidate afterglow for 1053220_g127 with genie
ra=238.80209 (15:55:12.50) dec=-54.03955 (-54:02:22.4) +/- 0.6" mag=16.97+/-0.14
dist=42.6 REFID=7 major=1.5 minor=1.0 flag=0
Found 7 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
238.8073 -54.0416 13.3 -1 USNO-B1 19.48 18.93 19.17
238.8032 -54.0414 7.2 -1 USNO-B1 99.99 18.61 99.99
238.8115 -54.0395 19.9 -1 USNO-B1 18.36 17.49 17.88
238.7989 -54.0417 10.3 -1 USNO-B1 19.87 19.48 19.65
238.8026 -54.0393 1.4 -1 USNO-B1 15.97 15.01 15.44 *
238.7955 -54.0409 14.7 -1 USNO-B1 17.24 16.07 16.59
238.8059 -54.0369 12.5 -1 USNO-B1 99.99 19.01 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 28 in the list of sources is a candidate afterglow for 1053220_g127 with genie
ra=238.77860 (15:55:06.86) dec=-54.05278 (-54:03:10.0) +/- 0.6" mag=16.06+/-0.14
dist=88.8 REFID=19 major=1.4 minor=1.2 flag=0
Found 6 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
238.7863 -54.0558 19.6 -1 USNO-B1 17.20 16.10 16.59
238.7843 -54.0484 19.8 -1 USNO-B1 20.14 19.47 19.77
238.7795 -54.0525 2.1 -1 USNO-B1 15.52 14.04 14.70 *
238.7782 -54.0548 7.2 -1 USNO-B1 99.99 19.37 99.99
238.7780 -54.0497 11.3 -1 USNO-B1 99.99 19.44 99.99
238.7734 -54.0551 13.8 -1 USNO-B1 19.88 18.81 19.29
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 29 in the list of sources is a candidate afterglow for 1053220_g127 with genie
ra=238.77641 (15:55:06.34) dec=-54.04700 (-54:02:49.2) +/- 0.6" mag=16.14+/-0.14
dist=90.1 REFID=14 major=1.0 minor=0.9 flag=0
This source is near the edge of image (0.950)
Found 4 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
238.7843 -54.0484 17.4 -1 USNO-B1 20.14 19.47 19.77
238.7780 -54.0497 10.1 -1 USNO-B1 99.99 19.44 99.99
238.7773 -54.0444 9.7 -1 USNO-B1 19.08 18.01 18.49
238.7755 -54.0464 2.8 -1 USNO-B1 14.60 13.14 13.79 *
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 32 in the list of sources is a candidate afterglow for 1053220_g127 with genie
ra=238.84719 (15:55:23.32) dec=-54.06620 (-54:03:58.3) +/- 0.6" mag=17.26+/-0.15
dist=94.0 REFID=36 major=1.1 minor=1.0 flag=3 (neighbor+blended)
This source is near the edge of image (0.898)
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
238.8399 -54.0656 15.5 -1 USNO-B1 99.99 19.02 99.99
238.8421 -54.0651 11.5 -1 USNO-B1 19.54 18.00 18.68
238.8453 -54.0683 8.5 -1 USNO-B1 19.47 18.55 18.96
238.8478 -54.0664 1.5 -1 USNO-B1 16.94 15.84 16.33 *
238.8456 -54.0702 14.8 -1 USNO-B1 19.24 18.55 18.85
238.8519 -54.0652 10.6 -1 USNO-B1 17.48 16.07 16.70
238.8486 -54.0684 8.6 -1 USNO-B1 16.53 15.32 15.86
238.8528 -54.0647 13.0 -1 USNO-B1 17.21 15.88 16.47
238.8518 -54.0677 11.2 -1 USNO-B1 19.09 17.89 18.42
238.8545 -54.0695 19.5 -1 USNO-B1 20.27 18.89 19.50
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 33 in the list of sources is a candidate afterglow for 1053220_g127 with genie
ra=238.85071 (15:55:24.17) dec=-54.06555 (-54:03:56.0) +/- 0.7" mag=18.52+/-0.16
dist=97.2 REFID=35 major=0.9 minor=0.8 flag=3 (neighbor+blended)
This source is near the edge of image (0.935)
Found 9 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
238.8421 -54.0651 18.3 -1 USNO-B1 19.54 18.00 18.68
238.8453 -54.0683 15.1 -1 USNO-B1 19.47 18.55 18.96
238.8478 -54.0664 7.0 -1 USNO-B1 16.94 15.84 16.33
238.8456 -54.0702 20.0 -1 USNO-B1 19.24 18.55 18.85
238.8519 -54.0652 2.8 -1 USNO-B1 17.48 16.07 16.70 *
238.8486 -54.0684 11.3 -1 USNO-B1 16.53 15.32 15.86
238.8528 -54.0647 5.3 -1 USNO-B1 17.21 15.88 16.47
238.8518 -54.0677 8.2 -1 USNO-B1 19.09 17.89 18.42
238.8545 -54.0695 16.2 -1 USNO-B1 20.27 18.89 19.50
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 50 in the list of sources is a candidate afterglow for 1053220_g127 with genie
ra=238.80991 (15:55:14.38) dec=-54.08159 (-54:04:53.7) +/- 0.7" mag=19.30+/-0.19
dist=129.5 REFID=51 major=1.3 minor=0.5 flag=3 (neighbor+blended)
This source is near the edge of image (0.929)
Found 6 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
238.8059 -54.0766 19.7 -1 USNO-B1 16.70 19.97 18.52
238.8108 -54.0772 15.7 -1 USNO-B1 16.87 16.68 16.76
238.8159 -54.0825 13.1 -1 USNO-B1 18.76 16.43 17.46
238.8123 -54.0830 7.1 -1 USNO-B1 17.67 16.63 17.09
238.8066 -54.0839 10.7 -1 USNO-B1 15.95 14.82 15.32
238.8031 -54.0846 18.0 -1 USNO-B1 18.36 17.16 17.70
uvot_check_outside found 12 of 12 good pixels
##### This source remains a candidate #####
It has no entries within 5.25" or brighter than 12 mag
There are 34388.117 counts in the bkg source region of 5459.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 6.299 counts/pixel (5-sig UL in 4" is 19.37 mag) for 1053220_g127
There are 450.73358 counts in the src source region of 49.000000 pixels.
Rate in src region with 4 arcsec radius is 9.199 counts/pixel for 1053220_g127
source too far from center -- do not compute local background.
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.37, BAT distances < 200",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
Region file: 1053220_644406474_210603d10h05m19s701734usUT_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(238.8184,-54.0540,45")
fk5;-circle(238.819023535831,-54.0448234857182,6")
fk5;-circle(238.825690154635,-54.0433573078019,6")
fk5;-circle(238.814840342044,-54.0405165770802,6")
fk5;-circle(238.826800264139,-54.0509864806809,6")
fk5;-circle(238.824889852846,-54.0532860565428,6")
fk5;-circle(238.804831848466,-54.0451624679908,6")
fk5;-circle(238.805425681778,-54.0551524594107,6")
fk5;-circle(238.800807827771,-54.0566743626311,6")
fk5;-circle(238.803452152075,-54.0627576763039,6")
fk5;-circle(238.806108162296,-54.0639427847743,6")
fk5;-circle(238.833480457226,-54.064667412554,6")
fk5;-circle(238.807488953096,-54.0663900214889,6")
Region file: 1053220_644406474_210603d10h05m19s701734usUT_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(238.809911632506,-54.0815881824938,4")
image paragraph message for exposure 1 of trigger 1053220
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB210603 (Swift/BAT trigger 1053220) at 09:45:46 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 61 seconds with the White filter
starting 100 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 15:55:14.38 = 238.80991
DEC(J2000) = -54:04:53.7 = -54.08159
with a 90%-confidence error radius of about 0.73 arc sec. This position is
129.5 arc sec. from the center of the BAT error circle. The estimated magnitude
is 19.30 with a 1-sigma error of about 0.19. No correction has been made for
the large, but uncertain, extinction expected.
------- notes for trigger 1053220 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210603d10h05m23s752247usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1053220
-expid=644406474 -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/1053220/
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. No XRT position found for
srclist. No XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 644406474.05536 or about 2021:154:09:47:49 UT
Found 2111 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 38% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 35 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.66 mag.
Found 52 source(s) in Genie image catalog. Found 10 Genie image source(s)
without IDs. There are 1 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 19.37 mag. Found 445 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
41% 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?
644406474 100 WHITE srclist found no candidates.
644406474 100 WHITE 238.80991 -54.08159 19.30/19.4 129.5 image Yes
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -54.08159
GRB_ERROR: 0.73
GRB_RA: 238.80991
IMAGE_START_TIME: 09:47:49
MAGNITUDE: 19.30
MAG_ERROR: 0.19
MESSAGE_TYPE: ACK
SOURCE: BAT