image overlap message for exposure 1 of trigger 887512
uvot_overlap.pl vrs. 2010-12-20b fem started at 190203d19h53m49s625961usUT
The observation of trigger 887512 started 2019-02-03T15:46:31.6
Examining file ./887512_g142_uvot_sky_image.fits
The exposure ID is 570901591
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (22.5897,55.7215) with a roll angle of 240.8
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 (22.5770,55.7380) with a radius of 3.000 arc min
This is 1.081 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 (22.5966,55.7222) with a radius of 0.045 arc min
This is 0.237 arc min from the center of the uvot region
The area of the XRT error circle is 0.006 sq. arc min
The UVOT/XRT overlap is 0.006 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 887512
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190203d19h53m55s106074usUT
Observation start time is 2019-02-03T15:46:31.6
Examining file ./887512_g142_uvot_catalog_image.fits
The exposure ID is 570901591
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 27 detected source(s) for 887512_g142
Aspect correction adds -0.00209 degrees (-0.502 sec of time = -4.24 arc sec) to RA
Aspect correction adds 0.00049 degrees ( 1.75 arcsec) to Dec
Total aspect correction is 4.59 arcsec
Star catalogs centered at 22.5934 , 55.7175 with radius 2.68 arc min.
n_usno: 214 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.65198
RA DEC Mag Color
bright star 0: 22.59698 (01:30:23.27) 55.75489 (+55:45:17.6) 11.65 USNO-V
Mean distance difference (CAT_DELTA) for 25 matched entries is 0.477" for 887512_g142
Mean and std. dev of mag. difference (MAG_DELTA) are 1.199 and 0.341 for 887512_g142
Found 4 entries without IDs and 4 entries that are acceptable afterglow candidates for 887512_g142.
Acceptable entries have no ID, XRT distances < 6.75", 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=22.5770 (01:30:18.48) DEC=55.7380 (+55:44:16.8)
XRT distances are from RA=22.5966 (01:30:23.18) DEC=55.7222 (+55:43:19.9)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 887512_g142 with genie
ra=22.59662 (01:30:23.19) dec=55.72241 (+55:43:20.7) +/- 0.6" mag=18.58+/-0.15
dist=0.8 REFID=15 major=1.0 minor=0.8 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
22.6011 55.7262 16.3 -1 USNO-B1 20.32 19.16 19.68
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
-----------------
Entry 8 in the list of sources is a candidate afterglow for 887512_g142 with genie
ra=22.60597 (01:30:25.43) dec=55.70676 (+55:42:24.3) +/- 0.6" mag=16.80+/-0.14
dist=58.7 REFID=1 major=7.5 minor=0.6 flag=18 (blended+aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 126.9 arc sec from the BAT position.
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
22.6017 55.7094 12.8 -1 USNO-B1 20.11 18.44 19.18
22.6061 55.7060 2.8 -1 USNO-B1 17.53 15.49 16.40 *
22.6063 55.7047 7.6 -1 USNO-B1 18.10 18.76 18.47
22.6099 55.7043 12.0 -1 USNO-B1 12.91 12.61 12.74
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 17 in the list of sources is a candidate afterglow for 887512_g142 with genie
ra=22.61251 (01:30:27.00) dec=55.70163 (+55:42:05.9) +/- 0.6" mag=18.69+/-0.15
dist=80.8 REFID=8 major=1.6 minor=0.5 flag=18 (blended+aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 149.4 arc sec from the BAT position.
This source is near the edge of image (0.861)
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
22.6063 55.7047 16.8 -1 USNO-B1 18.10 18.76 18.47
22.6099 55.7043 10.9 -1 USNO-B1 12.91 12.61 12.74
22.6151 55.7041 10.4 -1 USNO-B1 20.38 19.28 19.77
22.6167 55.6986 13.7 -1 USNO-B1 19.62 18.76 19.14
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 1.6
-----------------
Entry 25 in the list of sources is a candidate afterglow for 887512_g142 with genie
ra=22.57990 (01:30:19.17) dec=55.69704 (+55:41:49.3) +/- 0.6" mag=16.81+/-0.14
dist=96.7 REFID=2 major=9.6 minor=2.1 flag=18 (blended+aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 147.6 arc sec from the BAT position.
Found 5 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
22.5817 55.7022 18.8 -1 USNO-B1 18.75 16.37 17.43
22.5738 55.7008 18.3 -1 USNO-B1 19.03 16.98 17.89
22.5756 55.7001 14.0 -1 USNO-B1 99.99 19.25 99.99
22.5735 55.7008 18.8 -1 USNO-B1 18.77 16.68 17.61
22.5754 55.6945 12.9 -1 USNO-B1 18.00 16.35 17.08
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 9.6
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=22.59662 (01:30:23.19) dec=55.72241 (+55:43:20.7) +/- 0.6" mag=18.58+/-0.15 dist=0.8 REFID=15 flag=0
There are 61167.246 counts in the bkg source region of 5656.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 10.815 counts/pixel (5-sig UL in 4" is 20.06 mag) for 887512_g142
There are 1012.9431 counts in the src source region of 50.000000 pixels.
Rate in src region with 4 arcsec radius is 20.259 counts/pixel for 887512_g142
There are 12703.602 counts in the cand_src_bkg source region of 1183.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 10.738 counts/pixel (5-sig UL in 4" is 20.06 mag) for 887512_g142
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 20.61, XRT distances < 6.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
Region file: 887512_570901591_190203d19h53m55s106074usUT_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(22.5897,55.7215,45")
fk5;-circle(22.5966202035567,55.722408078639,6")
fk5;-circle(22.5852976955293,55.7193540474898,6")
fk5;-circle(22.6082247463897,55.7143224357922,6")
fk5;-circle(22.5993912954661,55.7300432628505,6")
fk5;-circle(22.5873354767226,55.731771060767,6")
fk5;-circle(22.5756085420057,55.7274413587618,6")
fk5;-circle(22.5789432821235,55.7105973366663,6")
fk5;-circle(22.5854639166878,55.7350700798112,6")
Region file: 887512_570901591_190203d19h53m55s106074usUT_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(22.5966202035567,55.722408078639,4")
Region file: 887512_570901591_190203d19h53m55s106074usUT_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(22.5966202035567,55.722408078639,25")
fk5;-circle(22.5966202035567,55.722408078639,15")
fk5;-circle(22.5852976955293,55.7193540474898,6")
fk5;-circle(22.5993912954661,55.7300432628505,6")
image paragraph message for exposure 1 of trigger 887512
------ Start for Possible Stand-alone Circular ----
In response to GRB190203 (Swift/BAT trigger 887512) at 15:44:08 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 120 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 01:30:23.19 = 22.59662
DEC(J2000) = +55:43:20.7 = 55.72241
with a 90%-confidence error radius of about 0.63 arc sec. This position is 0.8
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.58 with a 1-sigma error of about 0.15. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.64.
------- notes for trigger 887512 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190203d19h53m58s276533usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=887512
-expid=570901591 -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/887512/
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 570901591.64328 or about 2019:034:15:46:26 UT
Found 1377 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 22% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 62 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 27 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 4 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.61 mag. Found 210 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 20% 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?
570901591 120 WHITE 22.59634 55.72211 19.10/19.2 0.6 srclist Yes
570901591 120 WHITE 22.59662 55.72241 18.58/20.6 0.8 image Yes
List afterglow candidates for other finding charts.
570901749 278 U srclist found no candidates.
570901749 278 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 55.72241
GRB_ERROR: 0.63
GRB_RA: 22.59662
IMAGE_START_TIME: 15:46:26
MAGNITUDE: 18.58
MAG_ERROR: 0.15
MESSAGE_TYPE: ACK
SOURCE: XRT