image overlap message for exposure 1 of trigger 811561
uvot_overlap.pl vrs. 2010-12-20b fem started at 180225d00h59m20s996143usUT
The observation of trigger 811561 started 2018-02-24T22:22:53.3
Examining file ./811561_g105_uvot_sky_image.fits
The exposure ID is 541203773
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (202.6672,38.0910) with a roll angle of 66.1
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 (202.6610,38.0880) with a radius of 3.000 arc min
This is 0.343 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 (202.6838,38.0787) with a radius of 0.028 arc min
This is 1.076 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 811561
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180225d00h59m24s848126usUT
Observation start time is 2018-02-24T22:22:53.3
Examining file ./811561_g105_uvot_catalog_image.fits
The exposure ID is 541203773
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 9 detected source(s) for 811561_g105
Aspect correction adds 0.00018 degrees (0.043 sec of time = 0.50 arc sec) to RA
Aspect correction adds 0.00005 degrees ( 0.17 arcsec) to Dec
Total aspect correction is 0.53 arcsec
Star catalogs centered at 202.6702 , 38.0900 with radius 2.60 arc min.
n_usno: 52 n_gsc: 46
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 6 matched entries is 0.324" for 811561_g105
Mean and std. dev of mag. difference (MAG_DELTA) are 0.802 and 0.232 for 811561_g105
Found 3 entries without IDs and 3 entries that are acceptable afterglow candidates for 811561_g105.
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=202.6610 (13:30:38.64) DEC=38.0880 (+38:05:16.8)
XRT distances are from RA=202.6838 (13:30:44.12) DEC=38.0787 (+38:04:43.5)
*** WARNING 33 per cent of entries have no IDs.
-----------------
Entry 3 in the list of sources is a candidate afterglow for 811561_g105 with genie
ra=202.64646 (13:30:35.15) dec=38.10356 (+38:06:12.8) +/- 0.6" mag=16.04+/-0.14
dist=138.5 REFID=3 major=11.7 minor=7.5 flag=18 (blended+aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 69.5 arc sec from the BAT position.
Found 3 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
202.6474 38.1048 5.3 -1 USNO-B1 13.71 12.28 12.91
202.6441 38.1047 7.8 -1 USNO-B1 21.04 19.69 20.29
202.6474 38.1048 5.2 -1 GSC2.3 12.42 13.47 12.78
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 11.7
-----------------
Entry 5 in the list of sources is a candidate afterglow for 811561_g105 with genie
ra=202.68370 (13:30:44.09) dec=38.07906 (+38:04:44.6) +/- 0.6" mag=18.94+/-0.15
dist=1.2 REFID=1 major=1.1 minor=0.9 flag=0
Found 0 entries in star catalog(s) within 20.0" of the candidate.
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
-----------------
Entry 6 in the list of sources is a candidate afterglow for 811561_g105 with genie
ra=202.65068 (13:30:36.16) dec=38.10819 (+38:06:29.5) +/- 0.6" mag=17.35+/-0.14
dist=141.6 REFID=4 major=7.1 minor=2.1 flag=19 (neighbor+blended+aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 78.3 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
202.6474 38.1048 15.2 -1 USNO-B1 13.71 12.28 12.91
202.6508 38.1118 13.1 -1 USNO-B1 17.74 15.59 16.54
202.6474 38.1048 15.3 -1 GSC2.3 12.42 13.47 12.78
202.6508 38.1118 12.9 -1 GSC2.3 15.86 17.46 99.99
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 7.1
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=202.68370 (13:30:44.09) dec=38.07906 (+38:04:44.6) +/- 0.6" mag=18.94+/-0.15 dist=1.2 REFID=1 flag=0
There are 39965.020 counts in the bkg source region of 5974.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 6.690 counts/pixel (5-sig UL in 4" is 20.32 mag) for 811561_g105
There are 702.83112 counts in the src source region of 50.000000 pixels.
Rate in src region with 4 arcsec radius is 14.057 counts/pixel for 811561_g105
source too far from center -- do not compute local background.
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 20.87, 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: 811561_541203773_180225d00h59m24s848126usUT_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(202.6672,38.0910,45")
fk5;-circle(202.659151197577,38.0913522916178,6")
fk5;-circle(202.653662816685,38.088245908644,6")
fk5;-circle(202.667264732467,38.093366417115,6")
Region file: 811561_541203773_180225d00h59m24s848126usUT_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(202.683701262437,38.0790619392741,4")
image paragraph message for exposure 1 of trigger 811561
------ Start for Possible Stand-alone Circular ----
In response to GRB180224 (Swift/BAT trigger 811561) at 22:21:07 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 85 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 13:30:44.09 = 202.68370
DEC(J2000) = +38:04:44.6 = 38.07906
with a 90%-confidence error radius of about 0.63 arc sec. This position is 1.2
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.94 with a 1-sigma error of about 0.15. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.01.
------- notes for trigger 811561 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180225d00h59m27s160304usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=811561
-expid=541203773 -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/811561/
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 541203773.33026 or about 2018:055:22:22:48 UT
Found 212 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 34 sources in
srclist catalog. Found 13 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
Found 9 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 3 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.87 mag. Found 48 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 4% of the Genie image region.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 202.6837 dec= 38.0792 mag=19.43 sep=1.56".
The closest srclist source has ra= 202.6837 dec= 38.0792 mag=19.43 sep=1.56".
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?
541203773 84 WHITE 202.68372 38.07918 19.43/19.2 1.6 srclist Yes
541203773 84 WHITE 202.68370 38.07906 18.94/20.9 1.2 image Yes
List afterglow candidates for other finding charts.
541203985 296 U srclist found no candidates.
541203985 296 U image found no candidates.
541204563 874 WHITE srclist found no candidates.
541204563 874 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 38.07906
GRB_ERROR: 0.63
GRB_RA: 202.68370
IMAGE_START_TIME: 22:22:48
MAGNITUDE: 18.94
MAG_ERROR: 0.15
MESSAGE_TYPE: ACK
SOURCE: XRT