image overlap message for exposure 2 of trigger 982201
uvot_overlap.pl vrs. 2010-12-20b fem started at 200713d16h16m15s117786usUT
The observation of trigger 982201 started 2020-07-13T11:48:37.4
Examining file ./982201_g342_uvot_sky_image.fits
The exposure ID is 616333717
The exposure time is 179.985 (seconds)
The filter is U.
*** Warning -- found 24382 null pixels in the image.
The uvot region is centered at (76.9496,-32.8097) with a roll angle of 37.5
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 (76.9620,-32.8250) with a radius of 3.000 arc min
This is 1.109 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 5.14 sq. arc min or 0.18 of the BAT error circle
The XRT error circle is centered at (76.9499,-32.8147) with a radius of 0.035 arc min
This is 0.302 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 0.00 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 982201
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200713d16h16m25s438025usUT
Observation start time is 2020-07-13T11:48:37.4
Examining file ./982201_g342_uvot_sources_image.fits
The exposure ID is 616333717
The exposure is 179.985 sec.
The bin size is 2 pixels
The filter is U
There are 0 detected source(s) for 982201_g342
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 76.9614 , -32.8407 with radius 2.00 arc min.
n_usno: 47 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 982201_g342.
Acceptable entries have no ID, XRT distances < 5.25", 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=76.9620 (05:07:50.88) DEC=-32.8250 (-32:49:30.0)
XRT distances are from RA=76.9499 (05:07:47.98) DEC=-32.8147 (-32:48:53.1)
Found 1 entries in star catalog(s) within 20" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
76.9493 -32.8140 3.3 -1 USNO-B1 18.40 23.65 21.32
The closest star is 3.30" away.
List UVOT sources within 20" of the XRT position:
There are 0.0000000 counts in the bkg source region of 0.0000000 pixels.
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 18.14, XRT distances < 5.25",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Results are questionable because aspect solution FAILED.
Region file: 982201_616333717_200713d16h16m25s438025usUT_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(76.9496,-32.8097,45")
Region file: 982201_616333717_200713d16h16m25s438025usUT_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(76.94992,-32.81475,8")
Region file: 982201_616333717_200713d16h16m25s438025usUT_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(76.94992,-32.81475,25")
fk5;-circle(76.94992,-32.81475,15")
image paragraph message for exposure 2 of trigger 982201
IMAGE PROBLEM: damaged image (negative pixel value)
------ Start for Possible Stand-alone Circular ----
In response to GRB200713 (Swift/BAT trigger 982201) at 11:42:54 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 180 seconds with the U filter starting
317 seconds after the BAT trigger. No credible afterglow candidate has been
found in the initial data products. The 2.7'x2.7' sub-image processing FAILED
because of damaged image (negative pixel value). 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 0.02.
------- notes for trigger 982201 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200713d16h16m28s908650usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=982201
-expid=616333717 -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/982201/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
The Genie image appears to be DAMAGED with a min. value of -12538.955078.
XRT position found for srclist. XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 616333717.38138 or about 2020:195:11:48:32 UT
Found 315 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 23 sources in
srclist catalog. Found 8 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
17.94 mag.
Found 0 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 18.14 mag. Found 43 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 24382 null pixels.
The closest srclist source has ra= 76.9511 dec= -32.8318 mag=15.42 sep=61.53".
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?
616333717 317 U srclist found no candidates.
616333717 317 U image found no candidates.
List afterglow candidates for other finding charts.
616333559 159 WHITE srclist found no candidates.
616333559 159 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: -32.81475
GRB_ERROR: 5.25
GRB_RA: 76.94992
IMAGE_START_TIME: 11:48:32
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT