image overlap message for exposure 1 of trigger 817564
uvot_overlap.pl vrs. 2010-12-20b fem started at 180325d07h44m25s062139usUT
The observation of trigger 817564 started 2018-03-25T01:54:45.9
Examining file ./817564_g102_uvot_sky_image.fits
The exposure ID is 543635685
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (157.4224,24.4640) with a roll angle of 311.6
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 (157.4320,24.4390) with a radius of 3.000 arc min
This is 1.588 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 7.03 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (157.4273,24.4636) with a radius of 0.025 arc min
This is 0.270 arc min from the center of the uvot region
The area of the XRT error circle is 0.002 sq. arc min
The UVOT/XRT overlap is 0.002 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 817564
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180325d07h44m27s534872usUT
Observation start time is 2018-03-25T01:54:45.9
Examining file ./817564_g102_uvot_catalog_image.fits
The exposure ID is 543635685
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 4 detected source(s) for 817564_g102
Aspect correction adds 0.00010 degrees (0.024 sec of time = 0.32 arc sec) to RA
Aspect correction adds 0.00071 degrees ( 2.57 arcsec) to Dec
Total aspect correction is 2.59 arcsec
Star catalogs centered at 157.4250 , 24.4589 with radius 2.34 arc min.
n_usno: 31 n_gsc: 33
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 3 matched entries is 0.493" for 817564_g102
Mean and std. dev of mag. difference (MAG_DELTA) are 1.244 and 0.207 for 817564_g102
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 817564_g102.
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=157.4320 (10:29:43.68) DEC=24.4390 (+24:26:20.4)
XRT distances are from RA=157.4273 (10:29:42.56) DEC=24.4636 (+24:27:49.0)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 817564_g102 with genie
ra=157.42746 (10:29:42.59) dec=24.46347 (+24:27:48.5) +/- 0.8" mag=18.45+/-0.15
dist=0.7 REFID=2 major=0.9 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 14 of 14 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=157.42746 (10:29:42.59) dec=24.46347 (+24:27:48.5) +/- 0.8" mag=18.45+/-0.15 dist=0.7 REFID=2 flag=0
There are 58239.680 counts in the bkg source region of 6194.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 9.403 counts/pixel (5-sig UL in 4" is 20.13 mag) for 817564_g102
There are 1049.2805 counts in the src source region of 50.000000 pixels.
Rate in src region with 4 arcsec radius is 20.986 counts/pixel for 817564_g102
There are 11755.768 counts in the cand_src_bkg source region of 1242.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 9.465 counts/pixel (5-sig UL in 4" is 20.13 mag) for 817564_g102
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 20.69, 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: 817564_543635685_180325d07h44m27s534872usUT_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(157.4224,24.4640,45")
fk5;-circle(157.427455007845,24.4634658005394,6")
Region file: 817564_543635685_180325d07h44m27s534872usUT_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(157.427455007845,24.4634658005394,4")
Region file: 817564_543635685_180325d07h44m27s534872usUT_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(157.427455007845,24.4634658005394,25")
fk5;-circle(157.427455007845,24.4634658005394,15")
image paragraph message for exposure 1 of trigger 817564
------ Start for Possible Stand-alone Circular ----
In response to GRB180325 (Swift/BAT trigger 817564) at 01:53:02 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 82 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 10:29:42.59 = 157.42746
DEC(J2000) = +24:27:48.5 = 24.46347
with a 90%-confidence error radius of about 0.76 arc sec. This position is 0.7
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.45 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 817564 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180325d07h44m31s466843usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=817564
-expid=543635685 -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/817564/
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 543635685.86752 or about 2018:084:01:54:40 UT
Found 138 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 3% of the srclist region. Found 23 sources in
srclist catalog. Found 11 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 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
20.69 mag. Found 33 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 4% 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?
543635685 81 WHITE 157.42728 24.46350 18.77/19.2 0.4 srclist Yes
543635685 81 WHITE 157.42746 24.46347 18.45/20.7 0.7 image Yes
List afterglow candidates for other finding charts.
543635898 294 ? srclist data are not available.
543635898 294 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 24.46347
GRB_ERROR: 0.76
GRB_RA: 157.42746
IMAGE_START_TIME: 01:54:40
MAGNITUDE: 18.45
MAG_ERROR: 0.15
MESSAGE_TYPE: ACK
SOURCE: XRT