image overlap message for exposure 2 of trigger 864584


uvot_overlap.pl vrs. 2010-12-20b fem started at 180930d18h13m18s178745usUT

The observation of trigger 864584 started 2018-09-30T12:58:31.4
Examining file ./864584_g881_uvot_sky_image.fits
The exposure ID is 560005111
The exposure time is 149.868 (seconds)
The filter is WHITE.

The uvot region is centered at (76.8761,-25.1377) with a roll angle of 101.4
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 (76.8700,-25.1380) with a radius of 3.000 arc min
This is 0.332 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 (76.8632,-25.1169) with a radius of 0.028 arc min
This is 1.428 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 0.001 sq. arc min or 0.55 of the XRT error circle



image afterglow message for exposure 2 of trigger 864584


find_uvot_ag.pl vrs. 2017-02-17 fem started at 180930d18h13m26s818207usUT

Observation start time is 2018-09-30T12:58:31.4
Examining file ./864584_g881_uvot_catalog_image.fits
The exposure ID is 560005111
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 8 detected source(s) for 864584_g881
Aspect correction adds 0.00101 degrees (0.242 sec of time = 3.28 arc sec) to RA
Aspect correction adds 0.00001 degrees ( 0.05 arcsec) to Dec
Total aspect correction is 3.28 arcsec
Star catalogs centered at 76.8711 , -25.1347 with radius 2.42 arc min.
n_usno: 50 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.77222
                        RA                      DEC              Mag  Color
bright star  0:  76.86465 (05:07:27.52) -25.14039 (-25:08:25.4) 11.77 USNO-V
Mean distance difference (CAT_DELTA) for 5 matched entries is 0.589" for 864584_g881
Mean and std. dev of mag. difference (MAG_DELTA) are -0.370 and 3.373 for 864584_g881
Found 4 entries without IDs and 0 entries that are acceptable afterglow candidates for 864584_g881.
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.
4 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=76.8700 (05:07:28.80) DEC=-25.1380 (-25:08:16.8)
XRT distances are from RA=76.8632 (05:07:27.16) DEC=-25.1169 (-25:07:01.0)
*** WARNING 50 per cent of entries have no IDs.
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 1:
ra= 76.86516 dec=-25.13733 +/- 0.7" mag=17.08+/-0.14 dist=73.7 REFID=3 flag=2

Found 0 entries in star catalog(s) within 10" of the XRT position.

List UVOT sources within 10" of the XRT position:
There are 43474.035 counts in the bkg source region of 5881.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 7.392 counts/pixel (5-sig UL in 4" is 20.26 mag) for 864584_g881
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 20.82, 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: 864584_560005111_180930d18h13m26s818207usUT_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(76.8761,-25.1377,45")
fk5;-circle(76.8689542483846,-25.1418203766148,6")
fk5;-circle(76.8651587418561,-25.1373271159077,6")
fk5;-circle(76.8644237242654,-25.1405229217442,6")
fk5;-circle(76.8626864771885,-25.1441115923948,6")
fk5;-circle(76.8774974490432,-25.1490463664861,6")



image paragraph message for exposure 2 of trigger 864584


THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: partial overlap
SRCLIST PROBLEM: srclist filled telemetry buffer
See notes for more details.

------ Start for Possible Stand-alone Circular ----

In response to GRB180930 (Swift/BAT trigger 864584) at 12:43:49 UT,

---- UVOT paragraph for Joint or Stand-alone Circular ----

UVOT took a finding chart exposure of 150 seconds with the White filter
starting 860 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 55% 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
0.02.

------- notes for trigger 864584 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180930d18h13m29s332824usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=864584
-expid=560005111 -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/864584/
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 560005111.40648 or about 2018:273:12:58:26 UT

Found 608 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 121 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 8 source(s) in Genie image catalog. Found 4 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.82 mag. Found 46 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 5% of the
Genie image region.

Genie image analysis:
Found 43474.0 counts in the large background region of 5881.0 pixels or a rate
of 7.392 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 20.26 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 19.67 mag. The closest srclist
source has ra= 76.8588 dec= -25.1030 mag=18.29 sep=51.97". The closest Genie
source has ra= 76.8790 dec= -25.1139 mag=20.57 sep=52.88".

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?
560005111  860 WHITE srclist found no candidates.
560005111  860 WHITE image found no candidates.
List afterglow candidates for other finding charts.
560004462  211 WHITE srclist found no candidates.
560004462  211 WHITE image found no candidates.

------- Tokens for Quick GCN -------