srclist overlap message for exposure 1 of trigger 897653
uvot_overlap.pl vrs. 2010-12-20b fem started at 190409d14h03m14s039283usUT
The observation of trigger 897653 started 2019-04-09T13:50:54.1
Examining file 897653_g2972_uvot_sky_srclist.fits
The exposure ID is 576510654
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (324.9259,-46.6030) with a roll angle of 56.5
It is square with sides of 8.03 arc min. for an area of 64.51 sq arc min
The BAT error circle is centered at (324.9210,-46.6070) with a radius of 3.000 arc min
This is 0.316 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 28.27 sq. arc min or 1.00 of the BAT error circle
Could not find the location of an XRT error circle
srclist afterglow message for exposure 1 of trigger 897653
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190409d14h03m16s618694usUT
Observation start time is 2019-04-09T13:50:54.1
Examining file 897653_g2972_uvot_catalog_srclist.fits
The exposure ID is 576510654
The exposure is 149.850 sec.
The bin size is 2 pixels
The filter is WHITE
There are 31 detected source(s) for 897653_g2972
Aspect correction adds -0.00045 degrees (-0.108 sec of time = -1.11 arc sec) to RA
Aspect correction adds 0.00024 degrees ( 0.85 arcsec) to Dec
Total aspect correction is 1.40 arcsec
Star catalogs centered at 324.9319 , -46.6063 with radius 6.09 arc min.
n_usno: 387 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 31 matched entries is 0.691" for 897653_g2972
Mean and std. dev of mag. difference (MAG_DELTA) are 1.379 and 0.369 for 897653_g2972
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 897653_g2972.
Acceptable entries have no ID, BAT distance < 200" or XRT distance < 10", 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=324.9210 (21:39:41.04) DEC=-46.6070 (-46:36:25.2)
XRT distances are as reported in catalog file.
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.66, BAT distances < 200",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
srclist paragraph message for exposure 1 of trigger 897653
------ Start for Possible Stand-alone Circular ----
In response to GRB190409 (Swift/BAT trigger 897653) at 13:01:21 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 2950 seconds after the BAT trigger. No credible afterglow candidate
has been found in the initial data products. Results from the 2.7'x2.7'
sub-image are not available at this time. 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 897653 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190409d14h03m22s757433usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=897653
-expid=576510654 -msg_srclist
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/897653/
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. BAT position found.
UVOT exposure began at MET 576510654.05402 or about 2019:099:13:50:49 UT
Found 383 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 31 sources in
srclist catalog. Found 0 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.66 mag.
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?
576510654 2950 WHITE srclist found no candidates.
576510654 2950 WHITE image data are not available.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -46.60700
GRB_ERROR: 200
GRB_RA: 324.92100
IMAGE_START_TIME: 13:50:49
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: BAT