image overlap message for exposure 3 of trigger 1036227
uvot_overlap.pl vrs. 2010-12-20b fem started at 210308d12h50m14s842538usUT
The observation of trigger 1036227 started 2021-03-08T06:52:43.0
Examining file ./1036227_g886_uvot_sky_image.fits
The exposure ID is 636879163
The exposure time is 149.846 (seconds)
The filter is WHITE.
The uvot region is centered at (67.0706,37.4311) with a roll angle of 259.0
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 (67.0880,37.4110) with a radius of 3.000 arc min
This is 1.464 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 7.04 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (67.0746,37.4341) with a radius of 0.037 arc min
This is 0.260 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 1036227
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210308d12h51m01s101504usUT
Observation start time is 2021-03-08T06:52:43.0
Examining file ./1036227_g886_uvot_catalog_image.fits
The exposure ID is 636879163
The exposure is 149.846 sec.
The bin size is 2 pixels
The filter is WHITE
There are 7 detected source(s) for 1036227_g886
Aspect correction adds -0.00073 degrees (-0.174 sec of time = -2.08 arc sec) to RA
Aspect correction adds -0.00094 degrees (-3.39 arcsec) to Dec
Total aspect correction is 3.97 arcsec
Star catalogs centered at 67.0675 , 37.4308 with radius 2.64 arc min.
n_usno: 110 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 7 matched entries is 0.513" for 1036227_g886
Mean and std. dev of mag. difference (MAG_DELTA) are 1.033 and 0.361 for 1036227_g886
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1036227_g886.
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=67.0880 (04:28:21.12) DEC=37.4110 (+37:24:39.6)
XRT distances are from RA=67.0746 (04:28:17.90) DEC=37.4341 (+37:26:02.7)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 93261.930 counts in the bkg source region of 6199.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 15.045 counts/pixel (5-sig UL in 4" is 19.88 mag) for 1036227_g886
There are 3030.5469 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 15.077 counts/pixel for 1036227_g886
There are 18807.201 counts in the xrt_bkg source region of 1247.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 15.082 counts/pixel (5-sig UL in 4" is 19.88 mag) for 1036227_g886
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 20.43, 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: 1036227_636879163_210308d12h51m01s101504usUT_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(67.0706,37.4311,45")
fk5;-circle(67.0675274237185,37.4249216763332,6")
Region file: 1036227_636879163_210308d12h51m01s101504usUT_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(67.07458,37.43408,8")
Region file: 1036227_636879163_210308d12h51m01s101504usUT_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(67.07458,37.43408,25")
fk5;-circle(67.07458,37.43408,15")
image paragraph message for exposure 3 of trigger 1036227
------ Start for Possible Stand-alone Circular ----
In response to GRB210308 (Swift/BAT trigger 1036227) at 06:37:56 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 859 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
1.296.
------- notes for trigger 1036227 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210308d12h51m07s298605usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1036227
-expid=636879163 -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/1036227/
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 636879163.01564 or about 2021:067:06:52:38 UT
Found 1171 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 11% of the srclist region. Found 157 sources in
srclist catalog. Found 47 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 7 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 20.43 mag. Found 106 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 10% of the
Genie image region.
Genie image analysis:
Found 93261.9 counts in the large background region of 6199.0 pixels or a rate
of 15.045 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 19.70 mag. for a
4-arcsec aperture.
Found 3030.5 counts in the XRT position region of 201.0 pixels or a rate of
15.077 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.006 +/- 0.395 (1-sigma) cps. The
3-sigma UL at the XRT position is 1.186 cps or 19.42 mag. The closest srclist
source has ra= 67.0917 dec= 37.4368 mag=16.44 sep=49.78". The closest Genie
source has ra= 67.0675 dec= 37.4249 mag=19.68 sep=38.65".
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?
636879163 859 WHITE srclist found no candidates.
636879163 859 WHITE image found no candidates.
List afterglow candidates for other finding charts.
636878398 94 WHITE 67.07372 37.43386 18.95/19.2 2.6 srclist Yes
636878398 94 WHITE 67.07388 37.43388 18.57/20.4 8.5 image Yes
636878610 306 ? srclist data are not available.
636878610 306 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 37.43408
GRB_ERROR: 5.5
GRB_RA: 67.07458
IMAGE_START_TIME: 06:52:38
MAGNITUDE: 19.4
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT