image overlap message for exposure 3 of trigger 927825
uvot_overlap.pl vrs. 2010-12-20b fem started at 191005d00h22m07s003648usUT
The observation of trigger 927825 started 2019-10-04T18:22:00.7
Examining file ./927825_g897_uvot_sky_image.fits
The exposure ID is 591906120
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (31.7241,-36.9359) with a roll angle of 149.5
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 (31.7210,-36.9320) with a radius of 3.000 arc min
This is 0.279 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 (31.6684,-36.9330) with a radius of 0.028 arc min
This is 2.678 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 0.000 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 3 of trigger 927825
find_uvot_ag.pl vrs. 2017-02-17 fem started at 191005d00h22m15s703250usUT
Observation start time is 2019-10-04T18:22:00.7
Examining file ./927825_g897_uvot_catalog_image.fits
The exposure ID is 591906120
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 3 detected source(s) for 927825_g897
Aspect correction adds -0.00112 degrees (-0.269 sec of time = -3.22 arc sec) to RA
Aspect correction adds -0.00088 degrees (-3.16 arcsec) to Dec
Total aspect correction is 4.51 arcsec
Star catalogs centered at 31.7145 , -36.9399 with radius 2.15 arc min.
n_usno: 49 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 4 matched entries is 0.682" for 927825_g897
Mean and std. dev of mag. difference (MAG_DELTA) are -1.332 and 1.717 for 927825_g897
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 927825_g897.
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=31.7210 (02:06:53.04) DEC=-36.9320 (-36:55:55.2)
XRT distances are from RA=31.6684 (02:06:40.42) DEC=-36.9330 (-36:55:58.9)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 41270.246 counts in the bkg source region of 6187.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 6.670 counts/pixel (5-sig UL in 4" is 20.32 mag) for 927825_g897
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 20.87, 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: 927825_591906120_191005d00h22m15s703250usUT_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(31.7241,-36.9359,45")
fk5;-circle(31.7190532302268,-36.9224472174847,6")
fk5;-circle(31.7329241250327,-36.9442128774082,6")
image paragraph message for exposure 3 of trigger 927825
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB191004 (Swift/BAT trigger 927825) at 18:07:02 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 874 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 mag. No correction has been made for the expected
extinction corresponding to E(B-V) of 0.01.
------- notes for trigger 927825 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 191005d00h22m18s372291usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=927825
-expid=591906120 -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/927825/
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 591906120.66324 or about 2019:277:18:21:55 UT
Found 510 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 48 sources in
srclist catalog. Found 10 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 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 20.87 mag. Found 45 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 6% of the
Genie image region. The XRT position was OUTSIDE the star catalog search
region.
Genie image analysis:
Found 41270.2 counts in the large background region of 6187.0 pixels or a rate
of 6.670 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 20.32 mag. for a
4-arcsec aperture. The closest srclist source has ra= 31.6880 dec= -36.9493
mag=18.69 sep=81.08". The closest Genie source has ra= 31.7190 dec= -36.9224
mag=19.79 sep=150.62".
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?
591906120 873 WHITE srclist found no candidates.
591906120 873 WHITE image found no candidates.
List afterglow candidates for other finding charts.
591905331 84 ? srclist data are not available.
591905331 84 WHITE image found no candidates.
591905543 296 ? srclist data are not available.
591905543 296 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -36.93303
GRB_ERROR: 5
GRB_RA: 31.66842
IMAGE_START_TIME: 18:21:55
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT