image overlap message for exposure 1 of trigger 1014037
uvot_overlap.pl vrs. 2010-12-20b fem started at 201222d01h51m44s068618usUT
The observation of trigger 1014037 started 2020-12-21T23:08:32.9
Examining file ./1014037_g117_uvot_sky_image.fits
The exposure ID is 630284912
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (171.0537,42.1426) with a roll angle of 102.0
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 (171.0490,42.1440) with a radius of 3.000 arc min
This is 0.227 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 (171.0591,42.1432) with a radius of 0.065 arc min
This is 0.242 arc min from the center of the uvot region
The area of the XRT error circle is 0.013 sq. arc min
The UVOT/XRT overlap is 0.013 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1014037
find_uvot_ag.pl vrs. 2020-10-30 fem started at 201222d01h51m46s929133usUT
Observation start time is 2020-12-21T23:08:32.9
Examining file ./1014037_g117_uvot_catalog_image.fits
The exposure ID is 630284912
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 4 detected source(s) for 1014037_g117
Aspect correction adds -0.00013 degrees (-0.032 sec of time = -0.35 arc sec) to RA
Aspect correction adds -0.00020 degrees (-0.70 arcsec) to Dec
Total aspect correction is 0.79 arcsec
Star catalogs centered at 171.0448 , 42.1491 with radius 2.20 arc min.
n_usno: 58 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 4 matched entries is 0.228" for 1014037_g117
Mean and std. dev of mag. difference (MAG_DELTA) are 0.956 and 0.434 for 1014037_g117
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1014037_g117.
Acceptable entries have no ID, XRT distances < 9.75", 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=171.0490 (11:24:11.76) DEC=42.1440 (+42:08:38.4)
XRT distances are from RA=171.0591 (11:24:14.19) DEC=42.1432 (+42:08:35.5)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 1.0179055E+05 counts in the bkg source region of 6318.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 16.111 counts/pixel (5-sig UL in 4" is 19.84 mag) for 1014037_g117
There are 3330.9968 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 16.655 counts/pixel for 1014037_g117
There are 20005.053 counts in the xrt_bkg source region of 1244.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 16.081 counts/pixel (5-sig UL in 4" is 19.84 mag) for 1014037_g117
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 20.40, XRT distances < 9.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1014037_630284912_201222d01h51m46s929133usUT_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(171.0537,42.1426,45")
Region file: 1014037_630284912_201222d01h51m46s929133usUT_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(171.05912,42.14319,8")
Region file: 1014037_630284912_201222d01h51m46s929133usUT_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(171.05912,42.14319,25")
fk5;-circle(171.05912,42.14319,15")
image paragraph message for exposure 1 of trigger 1014037
------ Start for Possible Stand-alone Circular ----
In response to GRB201221 (Swift/BAT trigger 1014037) at 23:06:34 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 92 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 19.6 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 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.02.
------- notes for trigger 1014037 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 201222d01h51m49s646240usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1014037
-expid=630284912 -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/1014037/
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 630284912.85806 or about 2020:356:23:08:27 UT
Found 250 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 11 sources in
srclist catalog. Found 1 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 4 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 54 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 7% of the
Genie image region.
Genie image analysis:
Found 101790.6 counts in the large background region of 6318.0 pixels or a rate
of 16.111 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 19.66 mag. for a
4-arcsec aperture.
Found 3331.0 counts in the XRT position region of 200.0 pixels or a rate of
16.655 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.765 +/- 0.414 (1-sigma) cps or
19.89 mag and a range from 19.42 to 20.74 mag. The 3-sigma UL at the XRT
position is 2.006 cps or 18.84 mag. The closest srclist source has ra= 171.0356
dec= 42.1301 mag=19.45 sep=78.52". The closest Genie source has ra= 171.0356
dec= 42.1303 mag=18.66 sep=78.03".
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?
630284912 91 WHITE srclist found no candidates.
630284912 91 WHITE image found no candidates.
List afterglow candidates for other finding charts.
630285125 304 U srclist found no candidates.
630285125 304 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 42.14319
GRB_ERROR: 9.75
GRB_RA: 171.05912
IMAGE_START_TIME: 23:08:27
MAGNITUDE: 18.8
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT