image overlap message for exposure 3 of trigger 928924
uvot_overlap.pl vrs. 2010-12-20b fem started at 191011d10h28m17s945614usUT
The observation of trigger 928924 started 2019-10-11T04:50:48.3
Examining file ./928924_g891_uvot_sky_image.fits
The exposure ID is 592462248
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (44.7298,-27.8466) with a roll angle of 137.3
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 (44.7240,-27.8450) with a radius of 3.000 arc min
This is 0.323 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 (44.7280,-27.8454) with a radius of 0.025 arc min
This is 0.121 arc min from the center of the uvot region
The area of the XRT error circle is 0.002 sq. arc min
The UVOT/XRT overlap is 0.002 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 3 of trigger 928924
find_uvot_ag.pl vrs. 2017-02-17 fem started at 191011d10h28m36s642859usUT
Observation start time is 2019-10-11T04:50:48.3
Examining file ./928924_g891_uvot_catalog_image.fits
The exposure ID is 592462248
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 4 detected source(s) for 928924_g891
Aspect correction adds 0.00095 degrees (0.228 sec of time = 3.02 arc sec) to RA
Aspect correction adds -0.00001 degrees (-0.04 arcsec) to Dec
Total aspect correction is 3.02 arcsec
Star catalogs centered at 44.7271 , -27.8372 with radius 2.48 arc min.
n_usno: 54 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 3 matched entries is 0.760" for 928924_g891
Mean and std. dev of mag. difference (MAG_DELTA) are 0.573 and 0.597 for 928924_g891
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 928924_g891.
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=44.7240 (02:58:53.76) DEC=-27.8450 (-27:50:42.0)
XRT distances are from RA=44.7280 (02:58:54.72) DEC=-27.8454 (-27:50:43.4)
-----------------
Entry 1 in the list of sources is a candidate afterglow for 928924_g891 with genie
ra=44.72832 (02:58:54.80) dec=-27.84550 (-27:50:43.8) +/- 0.8" mag=19.51+/-0.16
dist=1.1 REFID=1 major=1.2 minor=1.1 flag=0
Found 1 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)
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
44.7226 -27.8436 19.4 -1 USNO-B1 20.07 20.50 20.31
uvot_check_outside found 13 of 13 good pixels
##### This source remains a candidate #####
It has no entries within 3.5" 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=44.72832 (02:58:54.80) dec=-27.84550 (-27:50:43.8) +/- 0.8" mag=19.51+/-0.16 dist=1.1 REFID=1 flag=0
There are 41009.605 counts in the bkg source region of 6092.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 6.732 counts/pixel (5-sig UL in 4" is 20.31 mag) for 928924_g891
There are 554.82538 counts in the src source region of 49.000000 pixels.
Rate in src region with 4 arcsec radius is 11.323 counts/pixel for 928924_g891
There are 7625.6885 counts in the cand_src_bkg source region of 1142.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 6.677 counts/pixel (5-sig UL in 4" is 20.32 mag) for 928924_g891
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: 1 good candidate(s) found.
Region file: 928924_592462248_191011d10h28m36s642859usUT_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(44.7298,-27.8466,45")
fk5;-circle(44.7223993832564,-27.8437712204444,6")
fk5;-circle(44.728316445474,-27.8454952706,6")
Region file: 928924_592462248_191011d10h28m36s642859usUT_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(44.728316445474,-27.8454952706,4")
Region file: 928924_592462248_191011d10h28m36s642859usUT_cand_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(44.728316445474,-27.8454952706,25")
fk5;-circle(44.728316445474,-27.8454952706,15")
fk5;-circle(44.7223993832564,-27.8437712204444,6")
image paragraph message for exposure 3 of trigger 928924
------ Start for Possible Stand-alone Circular ----
In response to GRB191011 (Swift/BAT trigger 928924) at 04:35:56 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 868 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 02:58:54.80 = 44.72832
DEC(J2000) = -27:50:43.8 = -27.84550
with a 90%-confidence error radius of about 0.78 arc sec. This position is 1.1
arc sec. from the center of the XRT error circle. The estimated magnitude is
19.51 with a 1-sigma error of about 0.16. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.02.
------- notes for trigger 928924 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 191011d10h28m41s856408usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=928924
-expid=592462248 -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/928924/
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 592462248.33634 or about 2019:284:04:50:43 UT
Found 573 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 82 sources in
srclist catalog. Found 49 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 4 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
20.87 mag. Found 50 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 5% of the Genie image region. The
closest srclist source has ra= 44.7005 dec= -27.8560 mag=16.55 sep=95.58".
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?
592462248 867 WHITE srclist found no candidates.
592462248 867 WHITE 44.72832 -27.84550 19.51/20.9 1.1 image Yes
List afterglow candidates for other finding charts.
592461457 76 WHITE srclist found no candidates.
592461457 76 WHITE 44.72832 -27.84541 20.20/20.9 1.0 image Yes
592461669 288 U srclist found no candidates.
592461669 288 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -27.84550
GRB_ERROR: 0.78
GRB_RA: 44.72832
IMAGE_START_TIME: 04:50:43
MAGNITUDE: 19.51
MAG_ERROR: 0.16
MESSAGE_TYPE: ACK
SOURCE: XRT