image overlap message for exposure 1 of trigger 880127
uvot_overlap.pl vrs. 2010-12-20b fem started at 181229d00h33m25s811699usUT
The observation of trigger 880127 started 2018-12-29T00:17:04.8
Examining file 880127_g1595_uvot_sky_image.fits
The exposure ID is 567735424
The exposure time is 32.756 (seconds)
The filter is WHITE.
The uvot region is centered at (18.1512,-60.9527) with a roll angle of 249.7
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 (18.1590,-60.9510) with a radius of 3.000 arc min
This is 0.249 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
Could not find the location of an XRT error circle
image afterglow message for exposure 1 of trigger 880127
find_uvot_ag.pl vrs. 2017-02-17 fem started at 181229d00h33m27s009244usUT
Observation start time is 2018-12-29T00:17:04.8
Examining file 880127_g1595_uvot_sources_image.fits
The exposure ID is 567735424
The exposure is 32.756 sec.
The bin size is 2 pixels
The filter is WHITE
There are 0 detected source(s) for 880127_g1595
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 18.1396 , -60.9561 with radius 2.00 arc min.
n_usno: 26 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
*** WARNING -- no XRT distances are available.
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 880127_g1595.
Acceptable entries have no ID, BAT distance < 210" or XRT distance < 20", 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=18.1590 (01:12:38.16) DEC=-60.9510 (-60:57:03.6)
XRT distances are as reported in catalog file.
There are 8993.4414 counts in the bkg source region of 6310.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 1.425 counts/pixel (5-sig UL in 4" is 19.51 mag) for 880127_g1595
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.50, BAT distances < 210",
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: 880127_567735424_181229d00h33m27s009244usUT_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(18.1512,-60.9527,45")
image paragraph message for exposure 1 of trigger 880127
IMAGE PROBLEM: partial overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB181228 (Swift/BAT trigger 880127) at 23:50:28 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 33 seconds with the White filter
starting 1574 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 25%
of the BAT 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 BAT 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 880127 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 181229d00h33m31s461921usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=880127
-expid=567735424 -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/880127/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
No XRT position found for srclist. No XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 567735424.7525 or about 2018:363:00:16:59 UT
Found 242 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 52 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
18.66 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 19.50 mag. Found 22 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 3% of the
Genie image region.
Genie image analysis:
Found 8993.4 counts in the large background region of 6310.0 pixels or a rate
of 1.425 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.
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?
567735424 1573 WHITE srclist found no candidates.
567735424 1573 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -60.95100
GRB_ERROR: 200
GRB_RA: 18.15900
IMAGE_START_TIME: 00:16:59
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: BAT