image overlap message for exposure 2 of trigger 1014316
uvot_overlap.pl vrs. 2010-12-20b fem started at 201224d14h54m28s786000usUT
The observation of trigger 1014316 started 2020-12-23T18:03:43.9
Examining file ./1014316_g316_uvot_sky_image.fits
The exposure ID is 630439423
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (132.8584,71.1779) with a roll angle of 48.0
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 (132.7346,71.1764) with a radius of 1.400 arc min
This is 2.399 arc min from the center of the uvot region
The area of the BAT error circle is 6.16 sq. arc min
The UVOT/BAT overlap is 0.51 sq. arc min or 0.08 of the BAT error circle
The XRT error circle is centered at (132.7902,71.1792) with a radius of 0.030 arc min
This is 1.323 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 0.003 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1014316
find_uvot_ag.pl vrs. 2020-10-30 fem started at 201224d14h54m41s669082usUT
Observation start time is 2020-12-23T18:03:43.9
Examining file ./1014316_g316_uvot_catalog_image.fits
The exposure ID is 630439423
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 5 detected source(s) for 1014316_g316
Aspect correction adds 0.00263 degrees (0.631 sec of time = 3.05 arc sec) to RA
Aspect correction adds 0.00042 degrees ( 1.51 arcsec) to Dec
Total aspect correction is 3.40 arcsec
Star catalogs centered at 132.8600 , 71.1778 with radius 2.55 arc min.
n_usno: 57 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.89348
RA DEC Mag Color
bright star 0: 132.82105 (08:51:17.05) 71.21744 (+71:13:02.8) 11.89 USNO-V
Mean distance difference (CAT_DELTA) for 4 matched entries is 0.133" for 1014316_g316
Mean and std. dev of mag. difference (MAG_DELTA) are 0.450 and 0.109 for 1014316_g316
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1014316_g316.
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.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=132.7346 (08:50:56.30) DEC=71.1764 (+71:10:34.9)
XRT distances are from RA=132.7902 (08:51:09.64) DEC=71.1792 (+71:10:45.2)
-----------------
Entry 2 in the list of sources is a candidate afterglow for 1014316_g316 with genie
ra=132.78971 (08:51:09.53) dec=71.18000 (+71:10:48.0) +/- 0.6" mag=16.96+/-0.15
dist=2.9 REFID=3 major=0.9 minor=0.7 flag=0
This source is near the edge of image (0.907)
Found 0 entries in star catalog(s) within 20.0" of the candidate.
printing all entries
(Entries within 2 arc sec of a source list entry are considered a match)
uvot_check_outside found 14 of 14 good pixels
##### This source remains a candidate #####
It has no entries within 5.25" or brighter than 12 mag
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=132.78971 (08:51:09.53) dec=71.18000 (+71:10:48.0) +/- 0.6" mag=16.96+/-0.15 dist=2.9 REFID=3 flag=0
There are 30813.543 counts in the bkg source region of 6201.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 4.969 counts/pixel (5-sig UL in 4" is 19.59 mag) for 1014316_g316
There are 968.58478 counts in the src source region of 50.000000 pixels.
Rate in src region with 4 arcsec radius is 19.372 counts/pixel for 1014316_g316
source too far from center -- do not compute local background.
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 20.15, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
Region file: 1014316_630439423_201224d14h54m41s669082usUT_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(132.8584,71.1779,45")
fk5;-circle(132.835751280963,71.1695305453578,6")
Region file: 1014316_630439423_201224d14h54m41s669082usUT_cand_src.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(132.789711791701,71.1799985556311,4")
image paragraph message for exposure 2 of trigger 1014316
------ Start for Possible Stand-alone Circular ----
In response to GRB201223 (Swift/BAT trigger 1014316) at 17:58:26 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
290 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 08:51:09.53 = 132.78971
DEC(J2000) = +71:10:48.0 = 71.18000
with a 90%-confidence error radius of about 0.62 arc sec. This position is 2.9
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.96 with a 1-sigma error of about 0.15. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.04.
------- notes for trigger 1014316 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 201224d14h54m45s373416usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1014316
-expid=630439423 -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/1014316/
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 630439423.91842 or about 2020:358:18:03:38 UT
Found 506 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 78 sources in
srclist catalog. Found 40 srclist source(s) without IDs. There are 1 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.12 mag.
Found 5 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 1 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.15 mag. Found 53 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 5% of the Genie image region.
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?
630439423 289 U 132.78956 71.17998 17.17/18.1 2.8 srclist Yes
630439423 289 U 132.78971 71.18000 16.96/20.1 2.9 image Yes
List afterglow candidates for other finding charts.
630439211 77 WHITE 132.78996 71.17990 16.76/19.2 2.5 srclist Yes
630439211 77 WHITE 132.78963 71.17982 16.16/20.8 2.2 image Yes
630440002 868 WHITE 132.78987 71.17972 18.55/19.2 1.0 srclist Yes
630440002 868 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 71.18000
GRB_ERROR: 0.62
GRB_RA: 132.78971
IMAGE_START_TIME: 18:03:38
MAGNITUDE: 16.96
MAG_ERROR: 0.15
MESSAGE_TYPE: ACK
SOURCE: XRT