image overlap message for exposure 1 of trigger 1064421
uvot_overlap.pl vrs. 2010-12-20b fem started at 210808d07h17m37s116350usUT
The observation of trigger 1064421 started 2021-08-07T23:00:36.3
Examining file ./1064421_g207_uvot_sky_image.fits
The exposure ID is 650070036
The exposure time is 249.935 (seconds)
The filter is V.
The uvot region is centered at (143.5284,-51.3957) with a roll angle of 354.3
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 (143.5510,-51.4090) with a radius of 3.000 arc min
This is 1.163 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 (143.5339,-51.4011) with a radius of 0.033 arc min
This is 0.380 arc min from the center of the uvot region
The area of the XRT error circle is 0.003 sq. arc min
The UVOT/XRT overlap is 0.003 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1064421
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210808d07h17m42s270719usUT
Observation start time is 2021-08-07T23:00:36.3
Examining file ./1064421_g207_uvot_catalog_image.fits
The exposure ID is 650070036
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is V
There are 11 detected source(s) for 1064421_g207
Aspect correction adds -0.00107 degrees (-0.256 sec of time = -2.40 arc sec) to RA
Aspect correction adds 0.00149 degrees ( 5.35 arcsec) to Dec
Total aspect correction is 5.87 arcsec
Star catalogs centered at 143.5358 , -51.4006 with radius 2.63 arc min.
n_usno: 95 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 10 matched entries is 0.320" for 1064421_g207
Mean and std. dev of mag. difference (MAG_DELTA) are 0.087 and 0.217 for 1064421_g207
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1064421_g207.
Acceptable entries have no ID, XRT distances < 5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
Magnitude criteria will be applied later.
BAT distances are from RA=143.5510 (09:34:12.24) DEC=-51.4090 (-51:24:32.4)
XRT distances are from RA=143.5339 (09:34:08.13) DEC=-51.4011 (-51:24:03.8)
-----------------
Entry 10 in the list of sources is a candidate afterglow for 1064421_g207 with genie
ra=143.57201 (09:34:17.28) dec=-51.38558 (-51:23:08.1) +/- 0.7" mag=18.05+/-0.17
dist=102.2 REFID=4 major=1.5 minor=1.2 flag=16 (aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 96.6 arc sec from the BAT position.
This source is near the edge of image (0.955)
Found 1 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
143.5779 -51.3891 18.4 -1 USNO-B1 99.99 20.28 99.99
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable flag of 16
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 39271.141 counts in the bkg source region of 5925.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 6.628 counts/pixel (5-sig UL in 4" is 18.93 mag) for 1064421_g207
There are 1359.1552 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 6.762 counts/pixel for 1064421_g207
There are 7746.3340 counts in the xrt_bkg source region of 1158.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 6.689 counts/pixel (5-sig UL in 4" is 18.92 mag) for 1064421_g207
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 19.48, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1064421_650070036_210808d07h17m42s270719usUT_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(143.5284,-51.3957,45")
fk5;-circle(143.531862399692,-51.4036148802469,6")
fk5;-circle(143.529277024306,-51.4065072881344,6")
fk5;-circle(143.518736299689,-51.3988813371955,6")
fk5;-circle(143.547901885826,-51.3891952351404,6")
fk5;-circle(143.509092397958,-51.4008690831971,6")
fk5;-circle(143.528361919087,-51.382162990614,6")
Region file: 1064421_650070036_210808d07h17m42s270719usUT_xrt.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(143.53387,-51.40106,8")
Region file: 1064421_650070036_210808d07h17m42s270719usUT_xrt_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(143.53387,-51.40106,25")
fk5;-circle(143.53387,-51.40106,15")
fk5;-circle(143.531862399692,-51.4036148802469,6")
fk5;-circle(143.529277024306,-51.4065072881344,6")
image paragraph message for exposure 1 of trigger 1064421
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB210807 (Swift/BAT trigger 1064421) at 22:57:08 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the V filter starting
180 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 100% of the
XRT error circle. The typical 3-sigma upper limit has been about 19.2 mag. 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 1064421 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210808d07h17m47s022690usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1064421
-expid=650070036 -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/1064421/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Large extinction of 10.198 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 650070036.2504 or about 2021:219:23:00:31 UT
Found 662 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 11% of the srclist region. Found 84 sources in
srclist catalog. Found 3 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 11 source(s) in Genie image catalog. Found 1 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 19.48 mag. Found 91 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
9% of the Genie image region.
Genie image analysis:
Found 39271.1 counts in the large background region of 5925.0 pixels or a rate
of 6.628 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 18.71 mag. for a
4-arcsec aperture.
Found 1359.2 counts in the XRT position region of 201.0 pixels or a rate of
6.762 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.059 +/- 0.160 (1-sigma) cps or
20.70 mag and a range from 19.27 to 99.99 mag. The 3-sigma UL at the XRT
position is 0.537 cps or 18.29 mag. The closest srclist source has ra= 143.5292
dec= -51.4065 mag=15.94 sep=22.05". The closest Genie source has ra= 143.5319
dec= -51.4036 mag=18.35 sep=10.24".
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?
650070036 180 V srclist found no candidates.
650070036 180 V image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: v
GRB_DEC: -51.40106
GRB_ERROR: 5
GRB_RA: 143.53387
IMAGE_START_TIME: 23:00:31
MAGNITUDE: 18.3
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT