image overlap message for exposure 3 of trigger 1037339
uvot_overlap.pl vrs. 2010-12-20b fem started at 210319d01h18m46s669087usUT
The observation of trigger 1037339 started 2021-03-18T04:09:22.5
Examining file ./1037339_g890_uvot_sky_image.fits
The exposure ID is 637733362
The exposure time is 149.868 (seconds)
The filter is WHITE.
*** Warning -- found 15559 null pixels in the image.
The uvot region is centered at (33.9230,-37.7883) with a roll angle of 309.4
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 (33.9300,-37.7890) with a radius of 3.000 arc min
This is 0.336 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 (33.9262,-37.7769) with a radius of 0.040 arc min
This is 0.700 arc min from the center of the uvot region
The area of the XRT error circle is 0.005 sq. arc min
The UVOT/XRT overlap is 0.00 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 3 of trigger 1037339
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210319d01h19m44s098277usUT
Observation start time is 2021-03-18T04:09:22.5
Examining file ./1037339_g890_uvot_catalog_image.fits
The exposure ID is 637733362
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 1 detected source(s) for 1037339_g890
Aspect correction adds -0.00033 degrees (-0.080 sec of time = -0.95 arc sec) to RA
Aspect correction adds -0.00045 degrees (-1.63 arcsec) to Dec
Total aspect correction is 1.89 arcsec
Star catalogs centered at 33.9138 , -37.8027 with radius 2.00 arc min.
n_usno: 49 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 2 matched entries is 0.391" for 1037339_g890
Mean and std. dev of mag. difference (MAG_DELTA) are -1.488 and 1.868 for 1037339_g890
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1037339_g890.
Acceptable entries have no ID, XRT distances < 6", 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=33.9300 (02:15:43.20) DEC=-37.7890 (-37:47:20.4)
XRT distances are from RA=33.9262 (02:15:42.29) DEC=-37.7769 (-37:46:36.9)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 16047.692 counts in the bkg source region of 1597.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 10.049 counts/pixel (5-sig UL in 4" is 20.10 mag) for 1037339_g890
There are 0.0000000 counts in the xrt source region of 0.0000000 pixels.
There are 0.0000000 counts in the xrt_bkg source region of 0.0000000 pixels.
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 20.65, XRT distances < 6",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1037339_637733362_210319d01h19m44s098277usUT_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(33.9230,-37.7883,45")
Region file: 1037339_637733362_210319d01h19m44s098277usUT_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(33.92621,-37.77692,8")
Region file: 1037339_637733362_210319d01h19m44s098277usUT_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(33.92621,-37.77692,25")
fk5;-circle(33.92621,-37.77692,15")
image paragraph message for exposure 3 of trigger 1037339
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB210318 (Swift/BAT trigger 1037339) at 03:54:31 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 864 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 0.017.
------- notes for trigger 1037339 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210319d01h19m48s230586usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1037339
-expid=637733362 -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/1037339/
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 637733362.51264 or about 2021:077:04:09:17 UT
Found 696 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 103 sources in
srclist catalog. Found 76 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 1 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 20.65 mag. Found 45 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 7% of the
Genie image region. The Genie image is INCOMPLETE with 15559 null pixels.
Genie image analysis:
Found 16047.7 counts in the large background region of 1597.0 pixels or a rate
of 10.049 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 19.92 mag. for a
4-arcsec aperture. The closest srclist source has ra= 33.8796 dec= -37.7698
mag=17.72 sep=135.14". The closest Genie source has ra= 33.9099 dec= -37.8108
mag=19.80 sep=130.53".
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?
637733362 863 WHITE srclist found no candidates.
637733362 863 WHITE image found no candidates.
List afterglow candidates for other finding charts.
637732625 126 WHITE srclist found no candidates.
637732625 126 WHITE image found no candidates.
637732783 284 U srclist found no candidates.
637732783 284 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -37.77692
GRB_ERROR: 6
GRB_RA: 33.92621
IMAGE_START_TIME: 04:09:17
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT