srclist overlap message for exposure 1 of trigger 1107209
uvot_overlap.pl vrs. 2010-12-20b fem started at 220519d21h28m01s567066usUT
The observation of trigger 1107209 started 2022-05-19T21:23:31.9
Examining file 1107209_g4400_uvot_sky_srclist.fits
The exposure ID is 674688211
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (245.0271,-15.6048) with a roll angle of 60.0
It is square with sides of 8.03 arc min. for an area of 64.51 sq arc min
The BAT error circle is centered at (245.0740,-15.4500) with a radius of 3.000 arc min
This is 9.679 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 0.00 sq. arc min or 0.00 of the BAT error circle
Could not find the location of an XRT error circle
srclist afterglow message for exposure 1 of trigger 1107209
find_uvot_ag.pl vrs. 2020-10-30 fem started at 220519d21h28m03s133330usUT
Observation start time is 2022-05-19T21:23:31.9
Examining file 1107209_g4400_uvot_catalog_srclist.fits
The exposure ID is 674688211
The exposure is 150.000 sec.
The bin size is 2 pixels
The filter is WHITE
There are 97 detected source(s) for 1107209_g4400
Aspect correction adds 0.00030 degrees (0.073 sec of time = 1.06 arc sec) to RA
Aspect correction adds 0.00132 degrees ( 4.74 arcsec) to Dec
Total aspect correction is 4.86 arcsec
Star catalogs centered at 245.0048 , -15.6190 with radius 7.57 arc min.
n_usno: 1180 n_gsc: 0
*** WARNING -- bright star catalog has 3 entries brighter than 12 mag
The brightest has mag 11.36956
RA DEC Mag Color
bright star 0: 244.95806 (16:19:49.93) -15.62373 (-15:37:25.4) 11.57 USNO-V
bright star 1: 245.04410 (16:20:10.58) -15.66173 (-15:39:42.2) 11.40 USNO-V
bright star 2: 245.07874 (16:20:18.90) -15.55376 (-15:33:13.5) 11.37 USNO-V
Mean distance difference (CAT_DELTA) for 85 matched entries is 0.769" for 1107209_g4400
Mean and std. dev of mag. difference (MAG_DELTA) are 1.449 and 0.453 for 1107209_g4400
Found 17 entries without IDs and 1 entries that are acceptable afterglow candidates for 1107209_g4400.
Acceptable entries have no ID, XRT distances < 10", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
6 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=245.0740 (16:20:17.76) DEC=-15.4500 (-15:26:60.0)
XRT distances are as reported in catalog file.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1107209_g4400 with 3x3 stamp
ra=244.97726 (16:19:54.54) dec=-15.64287 (-15:38:34.3) +/- 1.1" mag=19.48+/-0.35
dist=6.8 REFID=87
src: 0 distr. of nearby unmatched sources: 1 1 1 1 0
Found 3 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
244.9795 -15.6403 12.2 -1 USNO-B1 12.67 12.81 12.75 *
244.9790 -15.6424 6.3 -1 USNO-B1 99.99 19.29 99.99
244.9763 -15.6401 10.5 -1 USNO-B1 20.31 19.17 19.68
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
List UVOT sources within 10" of the XRT position:
Unmatched source ra=244.97726 (16:19:54.54) dec=-15.64287 (-15:38:34.3) +/- 1.1" mag=19.48+/-0.35 dist=6.8 REFID=87
Matched source ra=244.97948 (16:19:55.07) dec=-15.64064 (-15:38:26.3) +/- 1.1" mag=13.86+/-0.35 dist=8.7 REFID=2
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 19.22, XRT distances < 10",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
srclist paragraph message for exposure 1 of trigger 1107209
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no image afterglow info
SRCLIST PROBLEM: overlap is unknown
See notes for more details.
------ Start for Possible Stand-alone Circular ----
In response to GRB220519 (Swift/BAT trigger 1107209) at 20:10:10 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of nominal 150.000 seconds with the White
filter starting 4371 seconds after the BAT trigger. No credible afterglow
candidate has been found in the initial data products. Data from the 2.7'x2.7'
sub-image are not available at this time. The overlap of the 8'x8' region for
the list of sources generated on-board and the XRT error circle is uncertain.
No correction has been made for the expected extinction corresponding to E(B-V)
of 0.382.
------- notes for trigger 1107209 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 220519d21h28m06s665773usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1107209
-expid=674688211 -msg_srclist
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/1107209/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
*** Warning -- no exposure found, using srclist assumed value.
XRT position found for srclist. BAT position found.
UVOT exposure began at MET 674688211.94214 or about 2022:139:21:23:26 UT
Found 1176 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 14% of the srclist region. Found 97 sources in
srclist catalog. Found 17 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 2 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 244.9773 dec= -15.6429 mag=19.48 sep=6.78".
The closest srclist source has ra= 244.9773 dec= -15.6429 mag=19.48 sep=6.78".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of nominal 150.000 seconds with the White
filter starting 4371 seconds after the BAT trigger. There is a candidate
afterglow in the list of sources generated on-board at
RA(J2000) = 16:19:54.54 = 244.97726
DEC(J2000) = -15:38:34.3 = -15.64287
with a 90%-confidence error radius of about 1.10 arc sec. This position is 6.78
arc sec. from the center of the XRT error circle. The estimated magnitude is
19.48 with a 1-sigma error of about 0.35. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.382.
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?
674688211 4371 WHITE srclist found no candidates.
674688211 4371 ? image data are not available.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------