image overlap message for exposure 3 of trigger 846395
uvot_overlap.pl vrs. 2010-12-20b fem started at 180706d14h48m42s763828usUT
The observation of trigger 846395 started 2018-07-06T08:39:22.6
Examining file ./846395_g881_uvot_sky_image.fits
The exposure ID is 552559162
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (181.6339,66.0360) with a roll angle of 267.1
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 (181.6650,66.0350) with a radius of 3.000 arc min
This is 0.761 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 (181.6426,66.0371) with a radius of 0.028 arc min
This is 0.224 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 3 of trigger 846395
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180706d14h49m00s030288usUT
Observation start time is 2018-07-06T08:39:22.6
Examining file ./846395_g881_uvot_catalog_image.fits
The exposure ID is 552559162
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 1 detected source(s) for 846395_g881
Aspect correction adds 0.00001 degrees (0.003 sec of time = 0.02 arc sec) to RA
Aspect correction adds 0.00086 degrees ( 3.11 arcsec) to Dec
Total aspect correction is 3.11 arcsec
Star catalogs centered at 181.6316 , 66.0342 with radius 2.00 arc min.
n_usno: 47 n_gsc: 37
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 0 matched entries is 0.000" for 846395_g881
Mean and std. dev of mag. difference (MAG_DELTA) are 0.000 and -1.000 for 846395_g881
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 846395_g881.
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=181.6650 (12:06:39.60) DEC=66.0350 (+66:02:06.0)
XRT distances are from RA=181.6426 (12:06:34.22) DEC=66.0371 (+66:02:13.7)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 846395_g881 with genie
ra=181.64278 (12:06:34.27) dec=66.03719 (+66:02:13.9) +/- 0.8" mag=18.49+/-0.15
dist=0.3 REFID=1 major=1.0 minor=0.9 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
181.6397 66.0418 17.1 -1 USNO-B1 20.47 19.69 20.04
uvot_check_outside found 12 of 12 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=181.64278 (12:06:34.27) dec=66.03719 (+66:02:13.9) +/- 0.8" mag=18.49+/-0.15 dist=0.3 REFID=1 flag=0
There are 1.4817028E+05 counts in the bkg source region of 6210.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 23.860 counts/pixel (5-sig UL in 4" is 19.63 mag) for 846395_g881
There are 1659.0179 counts in the src source region of 50.000000 pixels.
Rate in src region with 4 arcsec radius is 33.180 counts/pixel for 846395_g881
There are 29942.650 counts in the cand_src_bkg source region of 1248.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 23.993 counts/pixel (5-sig UL in 4" is 19.62 mag) for 846395_g881
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 20.18, 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: 846395_552559162_180706d14h49m00s030288usUT_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(181.6339,66.0360,45")
fk5;-circle(181.642776910353,66.0371932233859,6")
Region file: 846395_552559162_180706d14h49m00s030288usUT_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(181.642776910353,66.0371932233859,4")
Region file: 846395_552559162_180706d14h49m00s030288usUT_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(181.642776910353,66.0371932233859,25")
fk5;-circle(181.642776910353,66.0371932233859,15")
image paragraph message for exposure 3 of trigger 846395
------ Start for Possible Stand-alone Circular ----
In response to GRB180706 (Swift/BAT trigger 846395) at 08:24:40 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 860 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 12:06:34.27 = 181.64278
DEC(J2000) = +66:02:13.9 = 66.03719
with a 90%-confidence error radius of about 0.76 arc sec. This position is 0.3
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.49 with a 1-sigma error of about 0.15. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.02.
------- notes for trigger 846395 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180706d14h49m03s408759usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=846395
-expid=552559162 -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/846395/
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 552559162.57122 or about 2018:187:08:39:17 UT
Found 456 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 28 sources in
srclist catalog. Found 4 srclist source(s) without IDs. There are 1 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
Found 1 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
20.18 mag. Found 43 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 7% 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?
552559162 860 WHITE 181.64286 66.03719 18.68/19.2 0.5 srclist Yes
552559162 860 WHITE 181.64278 66.03719 18.49/20.2 0.3 image Yes
List afterglow candidates for other finding charts.
552558396 94 WHITE srclist found no candidates.
552558396 94 WHITE 181.64235 66.03698 20.22/20.1 0.7 image Yes
552558608 306 U 181.64276 66.03704 18.01/18.1 0.4 srclist Yes
552558608 306 U 181.64308 66.03712 17.74/19.8 0.7 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 66.03719
GRB_ERROR: 0.76
GRB_RA: 181.64278
IMAGE_START_TIME: 08:39:17
MAGNITUDE: 18.49
MAG_ERROR: 0.15
MESSAGE_TYPE: ACK
SOURCE: XRT