image overlap message for exposure 2 of trigger 846395
uvot_overlap.pl vrs. 2010-12-20b fem started at 180706d14h48m42s297615usUT
The observation of trigger 846395 started 2018-07-06T08:30:08.8
Examining file ./846395_g327_uvot_sky_image.fits
The exposure ID is 552558608
The exposure time is 249.946 (seconds)
The filter is U.
The uvot region is centered at (181.6359,66.0358) 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 0.711 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 0.181 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 846395
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180706d14h48m53s330468usUT
Observation start time is 2018-07-06T08:30:08.8
Examining file ./846395_g327_uvot_catalog_image.fits
The exposure ID is 552558608
The exposure is 249.946 sec.
The bin size is 2 pixels
The filter is U
There are 1 detected source(s) for 846395_g327
Aspect correction adds -0.00033 degrees (-0.079 sec of time = -0.48 arc sec) to RA
Aspect correction adds 0.00091 degrees ( 3.27 arcsec) to Dec
Total aspect correction is 3.30 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_g327
Mean and std. dev of mag. difference (MAG_DELTA) are 0.000 and -1.000 for 846395_g327
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 846395_g327.
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_g327 with genie
ra=181.64308 (12:06:34.34) dec=66.03712 (+66:02:13.6) +/- 0.8" mag=17.74+/-0.15
dist=0.7 REFID=1 major=1.0 minor=1.0 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 17.5 -1 USNO-B1 20.47 19.69 20.04
uvot_check_outside found 11 of 11 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=181.64308 (12:06:34.34) dec=66.03712 (+66:02:13.6) +/- 0.8" mag=17.74+/-0.15 dist=0.7 REFID=1 flag=0
There are 64369.293 counts in the bkg source region of 6209.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 10.367 counts/pixel (5-sig UL in 4" is 19.20 mag) for 846395_g327
There are 815.00269 counts in the src source region of 49.000000 pixels.
Rate in src region with 4 arcsec radius is 16.633 counts/pixel for 846395_g327
There are 12923.578 counts in the cand_src_bkg source region of 1249.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 10.347 counts/pixel (5-sig UL in 4" is 19.20 mag) for 846395_g327
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 19.75, 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: 846395_552558608_180706d14h48m53s330468usUT_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(181.6359,66.0358,45")
fk5;-circle(181.643080596012,66.0371166045548,6")
Region file: 846395_552558608_180706d14h48m53s330468usUT_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(181.643080596012,66.0371166045548,4")
Region file: 846395_552558608_180706d14h48m53s330468usUT_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(181.643080596012,66.0371166045548,25")
fk5;-circle(181.643080596012,66.0371166045548,15")
image paragraph message for exposure 2 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 250 seconds with the U filter starting
307 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 12:06:34.34 = 181.64308
DEC(J2000) = +66:02:13.6 = 66.03712
with a 90%-confidence error radius of about 0.77 arc sec. This position is 0.7
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.74 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 180706d14h48m56s881743usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=846395
-expid=552558608 -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 552558608.78488 or about 2018:187:08:30:03 UT
Found 193 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 7 sources in
srclist catalog. Found 2 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 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
19.75 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?
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
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
552559162 860 WHITE 181.64286 66.03719 18.68/19.2 2.3 srclist Yes
552559162 860 WHITE 181.64278 66.03719 18.49/20.2 2.3 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 66.03712
GRB_ERROR: 0.77
GRB_RA: 181.64308
IMAGE_START_TIME: 08:30:03
MAGNITUDE: 17.74
MAG_ERROR: 0.15
MESSAGE_TYPE: ACK
SOURCE: XRT