image overlap message for exposure 2 of trigger 908288
uvot_overlap.pl vrs. 2010-12-20b fem started at 190613d11h30m33s015112usUT
The observation of trigger 908288 started 2019-06-13T04:12:44.4
Examining file ./908288_g325_uvot_sky_image.fits
The exposure ID is 582091964
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (182.5231,67.2341) with a roll angle of 289.6
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 (182.5590,67.2330) with a radius of 3.000 arc min
This is 0.837 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 (182.5296,67.2354) with a radius of 0.025 arc min
This is 0.168 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 2 of trigger 908288
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190613d11h30m47s996613usUT
Observation start time is 2019-06-13T04:12:44.4
Examining file ./908288_g325_uvot_catalog_image.fits
The exposure ID is 582091964
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 4 detected source(s) for 908288_g325
Aspect correction adds -0.00300 degrees (-0.720 sec of time = -4.18 arc sec) to RA
Aspect correction adds 0.00070 degrees ( 2.53 arcsec) to Dec
Total aspect correction is 4.89 arcsec
Star catalogs centered at 182.5385 , 67.2418 with radius 2.35 arc min.
n_usno: 40 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 3 matched entries is 0.367" for 908288_g325
Mean and std. dev of mag. difference (MAG_DELTA) are 0.594 and 0.384 for 908288_g325
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 908288_g325.
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=182.5590 (12:10:14.16) DEC=67.2330 (+67:13:58.8)
XRT distances are from RA=182.5296 (12:10:07.11) DEC=67.2354 (+67:14:07.3)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 908288_g325 with genie
ra=182.52950 (12:10:07.08) dec=67.23530 (+67:14:07.1) +/- 0.7" mag=18.78+/-0.17
dist=0.3 REFID=4 major=0.9 minor=0.8 flag=0
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 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=182.52950 (12:10:07.08) dec=67.23530 (+67:14:07.1) +/- 0.7" mag=18.78+/-0.17 dist=0.3 REFID=4 flag=0
There are 10243.539 counts in the bkg source region of 6206.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 1.651 counts/pixel (5-sig UL in 4" is 20.19 mag) for 908288_g325
There are 204.82663 counts in the src source region of 50.000000 pixels.
Rate in src region with 4 arcsec radius is 4.097 counts/pixel for 908288_g325
There are 2080.4717 counts in the cand_src_bkg source region of 1246.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 1.670 counts/pixel (5-sig UL in 4" is 20.19 mag) for 908288_g325
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 20.75, 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: 908288_582091964_190613d11h30m47s996613usUT_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(182.5231,67.2341,45")
fk5;-circle(182.529499246859,67.235299505279,6")
Region file: 908288_582091964_190613d11h30m47s996613usUT_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(182.529499246859,67.235299505279,4")
Region file: 908288_582091964_190613d11h30m47s996613usUT_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(182.529499246859,67.235299505279,25")
fk5;-circle(182.529499246859,67.235299505279,15")
image paragraph message for exposure 2 of trigger 908288
------ Start for Possible Stand-alone Circular ----
In response to GRB190613 (Swift/BAT trigger 908288) at 04:07:18 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
303 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 12:10:07.08 = 182.52950
DEC(J2000) = +67:14:07.1 = 67.23530
with a 90%-confidence error radius of about 0.67 arc sec. This position is 0.3
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.78 with a 1-sigma error of about 0.17. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.02.
------- notes for trigger 908288 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190613d11h30m52s672783usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=908288
-expid=582091964 -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/908288/
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 582091964.44274 or about 2019:164:04:12:39 UT
Found 276 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 13 sources in
srclist catalog. Found 1 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.12 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
20.75 mag. Found 36 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 4% of the Genie image region. The
closest srclist source has ra= 182.6061 dec= 67.2440 mag=18.54 sep=110.92".
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?
582091964 302 U srclist found no candidates.
582091964 302 U 182.52950 67.23530 18.78/20.8 0.3 image Yes
List afterglow candidates for other finding charts.
582091806 144 WHITE 182.52919 67.23528 18.28/19.2 0.7 srclist Yes
582091806 144 WHITE image found no candidates.
582092521 859 WHITE srclist found no candidates.
582092521 859 WHITE 182.52912 67.23530 19.70/20.9 1.9 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 67.23530
GRB_ERROR: 0.67
GRB_RA: 182.52950
IMAGE_START_TIME: 04:12:39
MAGNITUDE: 18.78
MAG_ERROR: 0.17
MESSAGE_TYPE: ACK
SOURCE: XRT