srclist overlap message for exposure 3 of trigger 846395
uvot_overlap.pl vrs. 2010-12-20b fem started at 180706d14h48m41s339226usUT
The observation of trigger 846395 started 2018-07-06T08:39:22.6
Examining file ./846395_g881_uvot_sky_srclist.fits
The exposure ID is 552559162
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (181.6344,66.0367) with a roll angle of 267.1
It is square with sides of 12.05 arc min. for an area of 145.15 sq arc min
The BAT error circle is centered at (181.6650,66.0350) with a radius of 3.000 arc min
This is 0.752 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 28.27 sq. arc min or 1.00 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 0.202 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
srclist afterglow message for exposure 3 of trigger 846395
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180706d14h48m59s085574usUT
Observation start time is 2018-07-06T08:39:22.6
Examining file ./846395_g881_uvot_catalog_srclist.fits
The exposure ID is 552559162
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 28 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 181.6083 , 66.0340 with radius 7.59 arc min.
n_usno: 460 n_gsc: 430
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 24 matched entries is 0.544" for 846395_g881
Mean and std. dev of mag. difference (MAG_DELTA) are 1.311 and 0.703 for 846395_g881
Found 4 entries without IDs and 3 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)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 846395_g881 with 5x5 stamp
ra=181.64286 (12:06:34.29) dec=66.03719 (+66:02:13.9) +/- 1.1" mag=18.68+/-0.35
dist=0.5 REFID=19
src: 0 distr. of nearby unmatched sources: 0 0 0 0 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 17.2 -1 USNO-B1 20.47 19.69 20.04
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
-----------------
Entry 1 in the list of sources is a candidate afterglow for 846395_g881 with 5x5 stamp
ra=181.60368 (12:06:24.88) dec=66.01888 (+66:01:08.0) +/- 1.1" mag=19.52+/-0.35
dist=87.0 REFID=28
*** The position of this source is inconsistent with the XRT position.
The position is 106.8 arc sec from the BAT position.
src: 1 distr. of nearby unmatched sources: 0 0 0 0 0
Found 1 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
181.5963 66.0182 11.2 -1 GSC2.3 99.99 22.45 99.99
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 5 in the list of sources is a candidate afterglow for 846395_g881 with 5x5 stamp
ra=181.59954 (12:06:23.89) dec=66.06934 (+66:04:09.6) +/- 1.1" mag=19.40+/-0.35
dist=131.9 REFID=26
*** The position of this source is inconsistent with the XRT position.
The position is 156.3 arc sec from the BAT position.
src: 5 distr. of nearby unmatched sources: 0 0 0 0 0
Found 4 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
181.5967 66.0690 4.4 -1 USNO-B1 19.86 18.94 19.35
181.5889 66.0714 17.2 -1 USNO-B1 20.44 18.51 19.36
181.5967 66.0689 4.4 -1 GSC2.3 18.83 19.95 18.94
181.5891 66.0712 16.6 -1 GSC2.3 18.29 20.14 18.89
*** If XRT position is correct, then this is NOT the afterglow
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=181.64286 (12:06:34.29) dec=66.03719 (+66:02:13.9) +/- 1.1" mag=18.68+/-0.35 dist=0.5 REFID=19
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.22, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
srclist 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 180706d14h49m01s133040usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=846395
-expid=552559162 -meonly -msg_srclist
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