image overlap message for exposure 2 of trigger 906654
uvot_overlap.pl vrs. 2010-12-20b fem started at 190604d18h46m01s633425usUT
The observation of trigger 906654 started 2019-06-04T15:03:17.0
Examining file ./906654_g361_uvot_sky_image.fits
The exposure ID is 581353397
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (297.5427,-32.9798) with a roll angle of 92.9
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 (297.5870,-32.9320) with a radius of 3.000 arc min
This is 3.631 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 1.60 sq. arc min or 0.06 of the BAT error circle
The XRT error circle is centered at (297.5406,-32.9780) with a radius of 0.032 arc min
This is 0.149 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 906654
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190604d18h46m20s065946usUT
Observation start time is 2019-06-04T15:03:17.0
Examining file ./906654_g361_uvot_catalog_image.fits
The exposure ID is 581353397
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 15 detected source(s) for 906654_g361
Aspect correction adds 0.00286 degrees (0.688 sec of time = 8.65 arc sec) to RA
Aspect correction adds -0.00134 degrees (-4.83 arcsec) to Dec
Total aspect correction is 9.91 arcsec
Star catalogs centered at 297.5438 , -32.9813 with radius 2.66 arc min.
n_usno: 165 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.03604
RA DEC Mag Color
bright star 0: 297.51590 (19:50:03.82) -32.97606 (-32:58:33.8) 11.04 USNO-V
Mean distance difference (CAT_DELTA) for 14 matched entries is 0.356" for 906654_g361
Mean and std. dev of mag. difference (MAG_DELTA) are 0.830 and 0.572 for 906654_g361
Found 2 entries without IDs and 1 entries that are acceptable afterglow candidates for 906654_g361.
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=297.5870 (19:50:20.88) DEC=-32.9320 (-32:55:55.2)
XRT distances are from RA=297.5406 (19:50:09.74) DEC=-32.9780 (-32:58:40.9)
-----------------
Entry 11 in the list of sources is a candidate afterglow for 906654_g361 with genie
ra=297.55879 (19:50:14.11) dec=-32.97228 (-32:58:20.2) +/- 1.0" mag=20.19+/-0.30
dist=58.8 REFID=5 major=1.1 minor=0.9 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 165.1 arc sec from the BAT position.
Found 3 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
297.5558 -32.9723 8.9 -1 USNO-B1 18.53 17.48 17.95
297.5593 -32.9730 2.9 -1 USNO-B1 19.62 17.18 18.26 *
297.5591 -32.9727 1.8 -1 USNO-B1 18.65 16.91 17.68 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are 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:
There are 17672.471 counts in the bkg source region of 5530.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 3.196 counts/pixel (5-sig UL in 4" is 19.83 mag) for 906654_g361
There are 623.38177 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 3.117 counts/pixel for 906654_g361
There are 3515.8694 counts in the xrt_bkg source region of 1079.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 3.258 counts/pixel (5-sig UL in 4" is 19.82 mag) for 906654_g361
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 20.39, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 906654_581353397_190604d18h46m20s065946usUT_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(297.5427,-32.9798,45")
fk5;-circle(297.533498274251,-32.9775857277686,6")
fk5;-circle(297.531595745298,-32.9733700123453,6")
fk5;-circle(297.542661274519,-32.9812362261447,6")
fk5;-circle(297.533046707697,-32.9862462988977,6")
fk5;-circle(297.545621783789,-32.9840670096841,6")
fk5;-circle(297.54404921406,-32.9689083003938,6")
fk5;-circle(297.551357214711,-32.9737606628385,6")
fk5;-circle(297.555751797167,-32.9722115863275,6")
Region file: 906654_581353397_190604d18h46m20s065946usUT_xrt.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(297.54058,-32.97803,8")
Region file: 906654_581353397_190604d18h46m20s065946usUT_xrt_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(297.54058,-32.97803,25")
fk5;-circle(297.54058,-32.97803,15")
fk5;-circle(297.533498274251,-32.9775857277686,6")
fk5;-circle(297.542661274519,-32.9812362261447,6")
fk5;-circle(297.545621783789,-32.9840670096841,6")
image paragraph message for exposure 2 of trigger 906654
------ Start for Possible Stand-alone Circular ----
In response to GRB190604 (Swift/BAT trigger 906654) at 14:57:15 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
338 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 100% of the
XRT error circle. The typical 3-sigma upper limit has been about 19.2 mag. The
8'x8' region for the list of sources generated on-board covers 100% of the XRT
error circle. The list of sources is typically complete to about 18.0 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.15.
------- notes for trigger 906654 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190604d18h46m24s049610usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=906654
-expid=581353397 -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/906654/
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.
*** Warning -- BAT and XRT error circles do NOT overlap.
UVOT exposure began at MET 581353397.02282 or about 2019:155:15:03:12 UT
Found 921 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 17% of the srclist region. Found 68 sources in
srclist catalog. Found 7 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 15 source(s) in Genie image catalog. Found 2 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.39 mag. Found 161 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 17672.5 counts in the large background region of 5530.0 pixels or a rate
of 3.196 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 19.87 mag. for a
4-arcsec aperture.
Found 623.4 counts in the XRT position region of 200.0 pixels or a rate of
3.117 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.113 +/- 0.109 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.327 cps or 19.59 mag. The closest srclist
source has ra= 297.5426 dec= -32.9813 mag=17.86 sep=13.15". The closest Genie
source has ra= 297.5427 dec= -32.9812 mag=17.22 sep=13.14".
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?
581353397 338 U srclist found no candidates.
581353397 338 U image found no candidates.
List afterglow candidates for other finding charts.
581353185 126 WHITE srclist found no candidates.
581353185 126 WHITE image found no candidates.
581353928 869 WHITE srclist found no candidates.
581353928 869 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -32.97803
GRB_ERROR: 5
GRB_RA: 297.54058
IMAGE_START_TIME: 15:03:12
MAGNITUDE: 19.6
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT