image overlap message for exposure 1 of trigger 887217
uvot_overlap.pl vrs. 2010-12-20b fem started at 190202d09h31m17s985790usUT
The observation of trigger 887217 started 2019-02-02T01:42:45.4
Examining file ./887217_g194_uvot_sky_image.fits
The exposure ID is 570764565
The exposure time is 125.911 (seconds)
The filter is WHITE.
The uvot region is centered at (166.5098,9.3777) with a roll angle of 107.3
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 (166.5120,9.3880) with a radius of 3.000 arc min
This is 0.630 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 (166.5023,9.3769) with a radius of 0.028 arc min
This is 0.443 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 1 of trigger 887217
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190202d09h31m35s510116usUT
Observation start time is 2019-02-02T01:42:45.4
Examining file ./887217_g194_uvot_catalog_image.fits
The exposure ID is 570764565
The exposure is 125.911 sec.
The bin size is 2 pixels
The filter is WHITE
There are 4 detected source(s) for 887217_g194
Aspect correction adds 0.00081 degrees (0.194 sec of time = 2.87 arc sec) to RA
Aspect correction adds 0.00049 degrees ( 1.77 arcsec) to Dec
Total aspect correction is 3.37 arcsec
Star catalogs centered at 166.5099 , 9.3884 with radius 2.00 arc min.
n_usno: 21 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 3 matched entries is 0.219" for 887217_g194
Mean and std. dev of mag. difference (MAG_DELTA) are 1.049 and 0.204 for 887217_g194
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 887217_g194.
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=166.5120 (11:06:02.88) DEC= 9.3880 (+09:23:16.8)
XRT distances are from RA=166.5023 (11:06:00.56) DEC= 9.3769 (+09:22:36.8)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 887217_g194 with genie
ra=166.50262 (11:06:00.63) dec=9.37683 (+09:22:36.6) +/- 0.7" mag=16.01+/-0.14
dist=1.1 REFID=1 major=1.0 minor=0.9 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 13 of 13 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=166.50262 (11:06:00.63) dec=9.37683 (+09:22:36.6) +/- 0.7" mag=16.01+/-0.14 dist=1.1 REFID=1 flag=0
There are 55094.000 counts in the bkg source region of 6195.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 8.893 counts/pixel (5-sig UL in 4" is 19.97 mag) for 887217_g194
There are 4287.9521 counts in the src source region of 52.000000 pixels.
Rate in src region with 4 arcsec radius is 82.461 counts/pixel for 887217_g194
There are 11429.153 counts in the cand_src_bkg source region of 1245.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 9.180 counts/pixel (5-sig UL in 4" is 19.96 mag) for 887217_g194
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 20.53, 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: 887217_570764565_190202d09h31m35s510116usUT_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(166.5098,9.3777,45")
fk5;-circle(166.502624518009,9.37682649848131,6")
Region file: 887217_570764565_190202d09h31m35s510116usUT_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(166.502624518009,9.37682649848131,4")
Region file: 887217_570764565_190202d09h31m35s510116usUT_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(166.502624518009,9.37682649848131,25")
fk5;-circle(166.502624518009,9.37682649848131,15")
image paragraph message for exposure 1 of trigger 887217
------ Start for Possible Stand-alone Circular ----
In response to GRB190202 (Swift/BAT trigger 887217) at 01:39:30 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 126 seconds with the White filter
starting 172 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 11:06:00.63 = 166.50262
DEC(J2000) = +09:22:36.6 = 9.37683
with a 90%-confidence error radius of about 0.74 arc sec. This position is 1.1
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.01 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.02.
------- notes for trigger 887217 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190202d09h31m40s611558usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=887217
-expid=570764565 -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/887217/
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 570764565.36342 or about 2019:033:01:42:40 UT
Found 194 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 3% of the srclist region. Found 107 sources in
srclist catalog. Found 90 srclist source(s) without IDs. There are 1 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.13 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
20.53 mag. Found 17 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 2% 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?
570764565 172 WHITE 166.50276 9.37677 16.87/19.1 1.6 srclist Yes
570764565 172 WHITE 166.50262 9.37683 16.01/20.5 1.1 image Yes
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 9.37683
GRB_ERROR: 0.74
GRB_RA: 166.50262
IMAGE_START_TIME: 01:42:40
MAGNITUDE: 16.01
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT