image overlap message for exposure 2 of trigger 995004
uvot_overlap.pl vrs. 2010-12-20b fem started at 200908d00h37m02s070877usUT
The observation of trigger 995004 started 2020-09-07T18:56:32.8
Examining file ./995004_g320_uvot_sky_image.fits
The exposure ID is 621197792
The exposure time is 249.946 (seconds)
The filter is U.
*** Warning -- found 19837 null pixels in the image.
The uvot region is centered at (89.0175,6.9111) with a roll angle of 85.7
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 (89.0130,6.9110) with a radius of 3.000 arc min
This is 0.269 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 at most 6.97 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (89.0290,6.9062) with a radius of 0.030 arc min
This is 0.747 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 0.00 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 995004
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200908d00h37m17s362428usUT
Observation start time is 2020-09-07T18:56:32.8
Examining file ./995004_g320_uvot_catalog_image.fits
The exposure ID is 621197792
The exposure is 249.946 sec.
The bin size is 2 pixels
The filter is U
There are 3 detected source(s) for 995004_g320
Aspect correction adds 0.00137 degrees (0.330 sec of time = 4.91 arc sec) to RA
Aspect correction adds -0.00117 degrees (-4.21 arcsec) to Dec
Total aspect correction is 6.47 arcsec
Star catalogs centered at 89.0214 , 6.9118 with radius 2.55 arc min.
n_usno: 225 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 3 matched entries is 1.010" for 995004_g320
Mean and std. dev of mag. difference (MAG_DELTA) are 1.645 and 0.688 for 995004_g320
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 995004_g320.
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=89.0130 (05:56:03.12) DEC= 6.9110 (+06:54:39.6)
XRT distances are from RA=89.0290 (05:56:06.97) DEC= 6.9062 (+06:54:22.5)
Found 1 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
89.0293 6.9037 9.1 -1 USNO-B1 99.99 20.52 99.99
The closest star is 9.09" away.
List UVOT sources within 10" of the XRT position:
There are 6.2387342 counts in the bkg source region of 1.0000000 pixels.
Rate in bkg region from 0 to 45 arcsec is 6.239 counts/pixel (5-sig UL in 4" is 19.47 mag) for 995004_g320
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 18.32, 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: 995004_621197792_200908d00h37m17s362428usUT_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(89.0175,6.9111,45")
Region file: 995004_621197792_200908d00h37m17s362428usUT_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(89.02904,6.90625,8")
Region file: 995004_621197792_200908d00h37m17s362428usUT_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(89.02904,6.90625,25")
fk5;-circle(89.02904,6.90625,15")
image paragraph message for exposure 2 of trigger 995004
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB200907 (Swift/BAT trigger 995004) at 18:51:11 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
296 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 18.0 mag. No correction has been made for the expected extinction
corresponding to E(B-V) of 0.61.
------- notes for trigger 995004 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200908d00h37m21s243879usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=995004
-expid=621197792 -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/995004/
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 621197792.81984 or about 2020:251:18:56:27 UT
Found 1932 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 18% of the srclist region. Found 109 sources in
srclist catalog. Found 37 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 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 18.32 mag. Found 221 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 23% of the
Genie image region. The Genie image is INCOMPLETE with 19837 null pixels.
Genie image analysis:
Found 6.2 counts in the large background region of 1.0 pixels or a rate of
6.200 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 19.51 mag. for a
4-arcsec aperture. The closest srclist source has ra= 89.0302 dec= 6.9130
mag=18.23 sep=24.66". The closest Genie source has ra= 89.0379 dec= 6.9201
mag=19.35 sep=58.98".
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?
621197792 295 U srclist found no candidates.
621197792 295 U image found no candidates.
List afterglow candidates for other finding charts.
621197580 83 WHITE srclist found no candidates.
621197580 83 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: 6.90625
GRB_ERROR: 5
GRB_RA: 89.02904
IMAGE_START_TIME: 18:56:27
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT