image overlap message for exposure 3 of trigger 1131397
uvot_overlap.pl vrs. 2010-12-20b fem started at 221027d23h19m15s926592usUT
The observation of trigger 1131397 started 2022-10-27T19:28:41.7
Examining file ./1131397_g902_uvot_sky_image.fits
The exposure ID is 688591721
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (225.6037,47.4419) with a roll angle of 195.0
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 (225.6030,47.4480) 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 (225.6210,47.4421) with a radius of 0.037 arc min
This is 0.702 arc min from the center of the uvot region
The area of the XRT error circle is 0.004 sq. arc min
The UVOT/XRT overlap is 0.004 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 3 of trigger 1131397
find_uvot_ag.pl vrs. 2020-10-30 fem started at 221027d23h19m31s502541usUT
Observation start time is 2022-10-27T19:28:41.7
Examining file ./1131397_g902_uvot_catalog_image.fits
The exposure ID is 688591721
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 3 detected source(s) for 1131397_g902
Aspect correction adds 0.00038 degrees (0.092 sec of time = 0.94 arc sec) to RA
Aspect correction adds -0.00128 degrees (-4.59 arcsec) to Dec
Total aspect correction is 4.69 arcsec
Star catalogs centered at 225.6050 , 47.4423 with radius 2.25 arc min.
n_usno: 72 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 3 matched entries is 0.610" for 1131397_g902
Mean and std. dev of mag. difference (MAG_DELTA) are 0.605 and 0.116 for 1131397_g902
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1131397_g902.
Acceptable entries have no ID, XRT distances < 5.5", 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=225.6030 (15:02:24.72) DEC=47.4480 (+47:26:52.8)
XRT distances are from RA=225.6210 (15:02:29.03) DEC=47.4421 (+47:26:31.4)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 60138.602 counts in the bkg source region of 6212.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 9.681 counts/pixel (5-sig UL in 4" is 20.12 mag) for 1131397_g902
There are 1951.8585 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 9.759 counts/pixel for 1131397_g902
There are 12397.438 counts in the xrt_bkg source region of 1251.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 9.910 counts/pixel (5-sig UL in 4" is 20.10 mag) for 1131397_g902
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 20.67, XRT distances < 5.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1131397_688591721_221027d23h19m31s502541usUT_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(225.6037,47.4419,45")
fk5;-circle(225.598877451696,47.4476642142662,6")
Region file: 1131397_688591721_221027d23h19m31s502541usUT_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(225.62096,47.44206,8")
Region file: 1131397_688591721_221027d23h19m31s502541usUT_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(225.62096,47.44206,25")
fk5;-circle(225.62096,47.44206,15")
image paragraph message for exposure 3 of trigger 1131397
------ Start for Possible Stand-alone Circular ----
In response to GRB221027 (Swift/BAT trigger 1131397) at 19:13:38 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 872 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
0.033.
------- notes for trigger 1131397 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 221027d23h19m34s866491usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1131397
-expid=688591721 -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/1131397/
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 688591721.70658 or about 2022:300:19:28:36 UT
Found 818 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 90 sources in
srclist catalog. Found 41 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 3 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 20.67 mag. Found 68 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 60138.6 counts in the large background region of 6212.0 pixels or a rate
of 9.681 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 19.94 mag. for a
4-arcsec aperture.
Found 1951.9 counts in the XRT position region of 200.0 pixels or a rate of
9.760 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.201 +/- 0.318 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.953 cps or 19.66 mag. The closest srclist
source has ra= 225.5990 dec= 47.4478 mag=20.00 sep=57.23". The closest Genie
source has ra= 225.5989 dec= 47.4477 mag=19.73 sep=57.42".
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?
688591721 872 WHITE srclist found no candidates.
688591721 872 WHITE image found no candidates.
List afterglow candidates for other finding charts.
688590979 130 WHITE srclist found no candidates.
688590979 130 WHITE image found no candidates.
688591192 343 U srclist found no candidates.
688591192 343 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 47.44206
GRB_ERROR: 5.5
GRB_RA: 225.62096
IMAGE_START_TIME: 19:28:36
MAGNITUDE: 19.7
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT