image overlap message for exposure 1 of trigger 1014012
uvot_overlap.pl vrs. 2010-12-20b fem started at 201221d18h57m32s862676usUT
The observation of trigger 1014012 started 2020-12-21T18:44:16.0
Examining file 1014012_g162_uvot_sky_image.fits
The exposure ID is 630269056
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (278.2031,34.4056) with a roll angle of 188.4
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 (278.2050,34.4110) with a radius of 3.000 arc min
This is 0.336 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 1014012
find_uvot_ag.pl vrs. 2020-10-30 fem started at 201221d18h57m34s227159usUT
Observation start time is 2020-12-21T18:44:16.0
Examining file 1014012_g162_uvot_catalog_image.fits
The exposure ID is 630269056
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 19 detected source(s) for 1014012_g162
Aspect correction adds 0.00009 degrees (0.022 sec of time = 0.27 arc sec) to RA
Aspect correction adds 0.00049 degrees ( 1.76 arcsec) to Dec
Total aspect correction is 1.78 arcsec
Star catalogs centered at 278.2063 , 34.4047 with radius 2.48 arc min.
n_usno: 138 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 19 matched entries is 0.360" for 1014012_g162
Mean and std. dev of mag. difference (MAG_DELTA) are 1.029 and 0.407 for 1014012_g162
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1014012_g162.
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=278.2050 (18:32:49.20) DEC=34.4110 (+34:24:39.6)
XRT distances are as reported in catalog file.
There are 84098.164 counts in the bkg source region of 5711.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 14.726 counts/pixel (5-sig UL in 4" is 19.89 mag) for 1014012_g162
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.88, BAT distances < 200",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1014012_630269056_201221d18h57m34s227159usUT_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(278.2031,34.4056,45")
fk5;-circle(278.205426269844,34.408947593491,6")
fk5;-circle(278.201121606864,34.4125212720065,6")
fk5;-circle(278.203480739475,34.4035996459934,6")
fk5;-circle(278.198109045741,34.4049670698822,6")
fk5;-circle(278.190812916967,34.4141467562734,6")
fk5;-circle(278.214841959539,34.3977549729224,6")
fk5;-circle(278.206087035454,34.3937266529463,6")
image paragraph message for exposure 1 of trigger 1014012
IMAGE PROBLEM: partial overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB201221 (Swift/BAT trigger 1014012) at 18:41:33 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 136 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
0.07.
------- notes for trigger 1014012 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 201221d18h57m37s786278usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1014012
-expid=630269056 -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/1014012/
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 630269056.047 or about 2020:356:18:44:11 UT
Found 832 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 14% of the srclist region. Found 115 sources in
srclist catalog. Found 3 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 19 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 19.88 mag. Found 134 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
15% of the Genie image region.
Genie image analysis:
Found 84098.2 counts in the large background region of 5711.0 pixels or a rate
of 14.726 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 19.71 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?
630269056 136 WHITE srclist found no candidates.
630269056 136 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 34.41100
GRB_ERROR: 200
GRB_RA: 278.20500
IMAGE_START_TIME: 18:44:11
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: BAT