image overlap message for exposure 2 of trigger 956639
uvot_overlap.pl vrs. 2010-12-20b fem started at 200216d00h38m10s028521usUT
The observation of trigger 956639 started 2020-02-15T14:54:14.1
Examining file ./956639_g882_uvot_sky_image.fits
The exposure ID is 603471254
The exposure time is 149.868 (seconds)
The filter is WHITE.
*** Warning -- found 19746 null pixels in the image.
The uvot region is centered at (34.1168,12.7779) with a roll angle of 251.1
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 (34.1220,12.7810) with a radius of 3.000 arc min
This is 0.354 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 4.05 sq. arc min or 0.14 of the BAT error circle
The XRT error circle is centered at (34.0794,12.7708) with a radius of 0.025 arc min
This is 2.231 arc min from the center of the uvot region
The area of the XRT error circle is 0.002 sq. arc min
The UVOT/XRT overlap is 0.000 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 956639
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200216d00h38m42s428808usUT
Observation start time is 2020-02-15T14:54:14.1
Examining file ./956639_g882_uvot_catalog_image.fits
The exposure ID is 603471254
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 1 detected source(s) for 956639_g882
Aspect correction adds -0.00110 degrees (-0.264 sec of time = -3.87 arc sec) to RA
Aspect correction adds -0.00038 degrees (-1.38 arcsec) to Dec
Total aspect correction is 4.11 arcsec
Star catalogs centered at 34.1176 , 12.7781 with radius 2.00 arc min.
n_usno: 25 n_gsc: 0
*** WARNING -- XRT position is outside star catalog search region.
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 0 matched entries is 0.000" for 956639_g882
Mean and std. dev of mag. difference (MAG_DELTA) are 0.000 and -1.000 for 956639_g882
Found 1 entries without IDs and 0 entries that are acceptable afterglow candidates for 956639_g882.
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=34.1220 (02:16:29.28) DEC=12.7810 (+12:46:51.6)
XRT distances are from RA=34.0794 (02:16:19.06) DEC=12.7708 (+12:46:14.9)
*** WARNING 100 per cent of entries have no IDs.
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 0:
ra= 34.11705 dec= 12.77817 +/- 1.1" mag=13.17+/-0.35 dist=134.7 REFID=1 flag=24
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are -6666.6963 counts in the bkg source region of 2.0000000 pixels.
Rate in bkg region from 0 to 45 arcsec is -3333.348 counts/pixel for 956639_g882
Do not compute counts in XRT region because position is too far from center.
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 19.42, 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: 956639_603471254_200216d00h38m42s428808usUT_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(34.1168,12.7779,45")
fk5;-circle(34.117050491204,12.7781693814533,6")
image paragraph message for exposure 2 of trigger 956639
IMAGE PROBLEM: damaged image (negative pixel value)
------ Start for Possible Stand-alone Circular ----
In response to GRB200215 (Swift/BAT trigger 956639) at 14:39:31 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 857 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 mag. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.15.
------- notes for trigger 956639 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200216d00h38m45s676878usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=956639
-expid=603471254 -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/956639/
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 -4222.565918.
XRT position found for srclist. XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 603471254.1482 or about 2020:046:14:54:09 UT
Found 463 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 35 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
19.22 mag.
Found 1 source(s) in Genie image catalog. Found 1 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 19.42 mag. Found 21 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 3% of the
Genie image region. The XRT position was OUTSIDE the star catalog search
region. The Genie image is INCOMPLETE with 19746 null pixels.
The closest srclist source has ra= 34.0933 dec= 12.7667 mag=18.06 sep=50.94".
The closest Genie source has ra= 34.1170 dec= 12.7782 mag=13.17 sep=134.74".
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?
603471254 857 WHITE srclist found no candidates.
603471254 857 WHITE image found no candidates.
List afterglow candidates for other finding charts.
603470486 89 WHITE 34.07879 12.77018 19.80/19.2 3.1 srclist Yes
603470486 89 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 12.77081
GRB_ERROR: 5
GRB_RA: 34.07942
IMAGE_START_TIME: 14:54:09
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT