image overlap message for exposure 1 of trigger 1073893
uvot_overlap.pl vrs. 2010-12-20b fem started at 210919d05h11m00s228688usUT
The observation of trigger 1073893 started 2021-09-19T00:30:40.8
Examining file ./1073893_g126_uvot_sky_image.fits
The exposure ID is 653704240
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (80.2361,1.2732) with a roll angle of 88.4
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 (80.2300,1.2740) with a radius of 3.000 arc min
This is 0.370 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 (80.2545,1.3115) with a radius of 0.077 arc min
This is 2.550 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 0.000 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1073893
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210919d05h11m15s720649usUT
Observation start time is 2021-09-19T00:30:40.8
Examining file ./1073893_g126_uvot_catalog_image.fits
The exposure ID is 653704240
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 10 detected source(s) for 1073893_g126
Aspect correction adds 0.00020 degrees (0.048 sec of time = 0.72 arc sec) to RA
Aspect correction adds -0.00035 degrees (-1.25 arcsec) to Dec
Total aspect correction is 1.44 arcsec
Star catalogs centered at 80.2320 , 1.2749 with radius 2.52 arc min.
n_usno: 67 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 11.5059
RA DEC Mag Color
bright star 0: 80.19302 (05:20:46.33) 1.26101 (+01:15:39.6) 11.51 USNO-V
Mean distance difference (CAT_DELTA) for 12 matched entries is 0.526" for 1073893_g126
Mean and std. dev of mag. difference (MAG_DELTA) are 0.933 and 0.625 for 1073893_g126
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1073893_g126.
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.
0 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)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 69351.453 counts in the bkg source region of 6003.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 11.553 counts/pixel (5-sig UL in 4" is 20.02 mag) for 1073893_g126
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 20.58, XRT distances < 11.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1073893_653704240_210919d05h11m15s720649usUT_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(80.2361,1.2732,45")
fk5;-circle(80.2260583973477,1.26969746792803,6")
fk5;-circle(80.2310655398182,1.28452756810315,6")
fk5;-circle(80.239337607882,1.28453337391048,6")
fk5;-circle(80.2458369198159,1.26499646798421,6")
image paragraph message for exposure 1 of trigger 1073893
IMAGE PROBLEM: no overlap
------ 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 99 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 210919d05h11m21s737068usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1073893
-expid=653704240 -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/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 653704240.79826 or about 2021:262:00:30:35 UT
Found 501 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 8% of the srclist region. Found 68 sources in
srclist catalog. Found 9 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 10 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 20.58 mag. Found 63 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
6% of the Genie image region. The XRT position was OUTSIDE the star catalog
search region.
Genie image analysis:
Found 69351.5 counts in the large background region of 6003.0 pixels or a rate
of 11.553 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 19.85 mag. for a
4-arcsec aperture.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 80.2551 dec= 1.3141 mag=19.38 sep=9.51".
The closest srclist source has ra= 80.2551 dec= 1.3141 mag=19.38 sep=9.51".
The closest Genie source has ra= 80.2334 dec= 1.2984 mag=19.75 sep=89.25".
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 150 seconds with the White filter
starting 99 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 05:21:01.23 = 80.25512
DEC(J2000) = +01:18:50.8 = 1.31410
with a 90%-confidence error radius of about 1.10 arc sec. This position is 9.51
arc sec. from the center of the XRT error circle. The estimated magnitude is
19.38 with a 1-sigma error of about 0.35. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.141.
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?
653704240 98 WHITE srclist found no candidates.
653704240 98 WHITE image found no candidates.
List afterglow candidates for other finding charts.
653704453 311 U srclist found no candidates.
653704453 311 U image found no candidates.
653705009 867 WHITE srclist found no candidates.
653705009 867 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 1.31153
GRB_ERROR: 11.5
GRB_RA: 80.25450
IMAGE_START_TIME: 00:30:35
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT