image overlap message for exposure 2 of trigger 980513
uvot_overlap.pl vrs. 2010-12-20b fem started at 200702d07h27m35s909383usUT
The observation of trigger 980513 started 2020-07-02T07:15:03.4
Examining file 980513_g324_uvot_sky_image.fits
The exposure ID is 615366903
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (274.4657,-16.1647) with a roll angle of 315.7
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 (274.4710,-16.1670) with a radius of 3.000 arc min
This is 0.334 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 (274.5017,-16.1317) with a radius of 0.050 arc min
This is 2.866 arc min from the center of the uvot region
The area of the XRT error circle is 0.008 sq. arc min
The UVOT/XRT overlap is 0.000 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 980513
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200702d07h27m37s202811usUT
Observation start time is 2020-07-02T07:15:03.4
Examining file 980513_g324_uvot_catalog_image.fits
The exposure ID is 615366903
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 21 detected source(s) for 980513_g324
Aspect correction adds -0.00064 degrees (-0.154 sec of time = -2.22 arc sec) to RA
Aspect correction adds 0.00080 degrees ( 2.87 arcsec) to Dec
Total aspect correction is 3.63 arcsec
Star catalogs centered at 274.4673 , -16.1641 with radius 2.69 arc min.
n_usno: 313 n_gsc: 0
*** WARNING -- XRT position is outside star catalog search region.
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 9.70432
RA DEC Mag Color
bright star 0: 274.43506 (18:17:44.41) -16.19148 (-16:11:29.3) 9.70 USNO-V
Mean distance difference (CAT_DELTA) for 19 matched entries is 0.634" for 980513_g324
Mean and std. dev of mag. difference (MAG_DELTA) are 1.558 and 0.956 for 980513_g324
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 980513_g324.
Acceptable entries have no ID, XRT distances < 7.5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=274.4710 (18:17:53.04) DEC=-16.1670 (-16:10:01.2)
XRT distances are from RA=274.5017 (18:18:00.40) DEC=-16.1317 (-16:07:54.2)
-----------------
Entry 7 in the list of sources is a candidate afterglow for 980513_g324 with genie
ra=274.48706 (18:17:56.89) dec=-16.17457 (-16:10:28.5) +/- 0.6" mag=16.74+/-0.14
dist=162.3 REFID=15 major=1.0 minor=1.0 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 61.9 arc sec from the BAT position.
Found 4 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
274.4819 -16.1761 18.8 -1 USNO-B1 19.00 15.28 16.93
274.4856 -16.1730 7.7 -1 USNO-B1 19.58 16.34 17.78
274.4876 -16.1740 2.8 -1 USNO-B1 14.44 12.75 13.50 *
274.4927 -16.1743 19.4 -1 USNO-B1 14.52 12.77 13.55
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 9 in the list of sources is a candidate afterglow for 980513_g324 with genie
ra=274.48841 (18:17:57.22) dec=-16.17358 (-16:10:24.9) +/- 0.6" mag=16.40+/-0.14
dist=157.5 REFID=14 major=1.0 minor=1.0 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 64.7 arc sec from the BAT position.
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
274.4856 -16.1730 10.0 -1 USNO-B1 19.58 16.34 17.78
274.4876 -16.1740 3.1 -1 USNO-B1 14.44 12.75 13.50 *
274.4929 -16.1711 18.0 -1 USNO-B1 20.29 17.43 18.70
274.4927 -16.1743 15.0 -1 USNO-B1 14.52 12.77 13.55
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
Found 1 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
274.4995 -16.1332 9.0 -1 USNO-B1 19.68 16.75 18.05
The closest star is 9.03" away.
List UVOT sources within 10" of the XRT position:
There are 42638.082 counts in the bkg source region of 6081.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 7.012 counts/pixel (5-sig UL in 4" is 19.41 mag) for 980513_g324
Do not compute counts in XRT region because position is too far from center.
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 19.96, XRT distances < 7.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 980513_615366903_200702d07h27m37s202811usUT_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(274.4657,-16.1647,45")
fk5;-circle(274.461541882212,-16.1640589630825,6")
fk5;-circle(274.471051301899,-16.1776535871259,6")
fk5;-circle(274.459715064833,-16.1590611765584,6")
image paragraph message for exposure 2 of trigger 980513
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no overlap
SRCLIST PROBLEM: srclist filled telemetry buffer
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB200702 (Swift/BAT trigger 980513) at 07:09:38 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
299 seconds after the BAT trigger. No credible afterglow candidate has been
found in the initial data products. The 2.7'x2.7' sub-image covers none of the
XRT error circle. The 8'x8' region for the list of sources generated on-board
covers 100% of the XRT error circle. The list of sources is typically complete
to about 18.0 mag. No correction has been made for the large, but uncertain,
extinction expected.
------- notes for trigger 980513 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200702d07h27m38s511477usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=980513
-expid=615366903 -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/980513/
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. Unreliable extinction found for
xrt position. XRT position found for srclist. XRT position found for Genie
image. BAT position found.
UVOT exposure began at MET 615366903.44008 or about 2020:184:07:14:58 UT
Found 3184 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 31% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 50 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.12 mag.
Found 21 source(s) in Genie image catalog. Found 2 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 19.96 mag. Found 309 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
29% of the Genie image region. The XRT position was OUTSIDE the star catalog
search region.
Genie image analysis:
Found 42638.1 counts in the large background region of 6081.0 pixels or a rate
of 7.012 counts/pixel in a radius of 45.0 arcsec. Based on this background, the
typical 5-sigma UL at a random point in the Genie image is 19.45 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 18.04 mag.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 274.5013 dec= -16.1345 mag=17.40 sep=9.93".
The closest srclist source has ra= 274.5013 dec= -16.1345 mag=17.40 sep=9.93".
The closest Genie source has ra= 274.4837 dec= -16.1444 mag=18.51 sep=77.15".
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 250 seconds with the U filter starting
299 seconds after the BAT trigger. There is a candidate afterglow in the list
of sources generated on-board at
RA(J2000) = 18:18:00.31 = 274.50128
DEC(J2000) = -16:08:04.0 = -16.13445
with a 90%-confidence error radius of about 1.10 arc sec. This position is 9.93
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.40 with a 1-sigma error of about 0.35. No correction has been made for the
large, but uncertain, extinction expected.
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?
615366903 298 U srclist found no candidates.
615366903 298 U image found no candidates.
List afterglow candidates for other finding charts.
615366691 86 WHITE srclist found no candidates.
615366691 86 WHITE image found no candidates.
------- Tokens for Quick GCN -------