srclist overlap message for exposure 3 of trigger 1073893
uvot_overlap.pl vrs. 2010-12-20b fem started at 210919d05h10m59s757523usUT
The observation of trigger 1073893 started 2021-09-19T00:43:30.0
Examining file ./1073893_g895_uvot_sky_srclist.fits
The exposure ID is 653705009
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (80.2345,1.2747) with a roll angle of 88.4
It is square with sides of 12.05 arc min. for an area of 145.15 sq arc min
The BAT error circle is centered at (80.2300,1.2740) with a radius of 3.000 arc min
This is 0.275 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 28.27 sq. arc min or 1.00 of the BAT error circle
The XRT error circle is centered at (80.2545,1.3115) with a radius of 0.077 arc min
This is 2.513 arc min from the center of the uvot region
The area of the XRT error circle is 0.018 sq. arc min
The UVOT/XRT overlap is 0.018 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 3 of trigger 1073893
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210919d05h11m40s163724usUT
Observation start time is 2021-09-19T00:43:30.0
Examining file ./1073893_g895_uvot_catalog_srclist.fits
The exposure ID is 653705009
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 1073893_g895
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 1.000
srclist_overlap returned: xrt_overlap 1.000
Dimmest detected source in 1073893_g895 has mag 19.22
Aspect correction adds 0.00018 degrees (0.042 sec of time = 0.64 arc sec) to RA
Aspect correction adds -0.00068 degrees (-2.46 arcsec) to Dec
Total aspect correction is 2.55 arcsec
Star catalogs centered at 80.2353 , 1.2788 with radius 8.80 arc min.
n_usno: 943 n_gsc: 0
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 10.50246
RA DEC Mag Color
bright star 0: 80.19302 (05:20:46.33) 1.26101 (+01:15:39.6) 11.51 USNO-V
bright star 1: 80.18946 (05:20:45.47) 1.34649 (+01:20:47.4) 10.50 USNO-V
Mean distance difference (CAT_DELTA) for 133 matched entries is 0.788" for 1073893_g895
Mean and std. dev of mag. difference (MAG_DELTA) are 1.482 and 0.596 for 1073893_g895
Found 58 entries without IDs and 1 entries that are acceptable afterglow candidates for 1073893_g895.
Acceptable entries have no ID, XRT distances < 11.5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
51 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=80.2300 (05:20:55.20) DEC= 1.2740 (+01:16:26.4)
XRT distances are from RA=80.2545 (05:21:01.08) DEC= 1.3115 (+01:18:41.5)
*** WARNING 30 per cent of entries have no IDs.
-----------------
Entry 37 in the list of sources is a candidate afterglow for 1073893_g895 with 3x3 stamp
ra=80.22447 (05:20:53.87) dec=1.22664 (+01:13:35.9) +/- 1.1" mag=18.96+/-0.35
dist=324.2 REFID=71
*** The position of this source is inconsistent with the XRT position.
The position is 171.7 arc sec from the BAT position.
src: 37 srclist_match has ID
src: 37 distr. of nearby unmatched sources: 1 1 0 0 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
80.2239 1.2280 5.3 -1 USNO-B1 18.69 15.70 17.03
80.2244 1.2271 1.8 -1 USNO-B1 17.46 16.14 16.72 *
80.2249 1.2233 12.2 -1 USNO-B1 19.54 17.96 18.66
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 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
80.2551 1.3142 9.9 -1 USNO-B1 18.52 17.95 18.21
The closest star is 9.87" away.
List UVOT sources within 10" of the XRT position:
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 < 11.5",
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 3 of trigger 1073893
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.
------ Start for Possible Stand-alone Circular ----
In response to GRB210919 (Swift/BAT trigger 1073893) at 00:28:33 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 868 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 mag. No correction has been made for the expected
extinction corresponding to E(B-V) of 0.141.
------- notes for trigger 1073893 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210919d05h11m43s964439usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1073893
-expid=653705009 -meonly -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/1073893/
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 653705009.98024 or about 2021:262:00:43:24 UT
Found 939 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 8% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 58 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 11 source(s) in Genie image catalog. Found 0 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.40 mag. Found 65 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
6% of the Genie image region.
Genie image analysis:
Found 97535.9 counts in the large background region of 6080.0 pixels or a rate
of 16.042 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 19.67 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 19.22 mag. The closest srclist
source has ra= 80.2553 dec= 1.3144 mag=19.09 sep=10.64". The closest Genie
source has ra= 80.2318 dec= 1.3013 mag=17.81 sep=89.43".
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?
653705009 867 WHITE srclist found no candidates.
653705009 867 WHITE image found no candidates.
List afterglow candidates for other finding charts.
653704240 98 WHITE srclist found no candidates.
653704240 98 WHITE image found no candidates.
653704453 311 U srclist found no candidates.
653704453 311 U image found no candidates.
------- Tokens for Quick GCN -------