image overlap message for exposure 3 of trigger 871316
uvot_overlap.pl vrs. 2010-12-20b fem started at 181110d17h04m24s031837usUT
The observation of trigger 871316 started 2018-11-10T08:58:14.4
Examining file ./871316_g882_uvot_sky_image.fits
The exposure ID is 563533094
The exposure time is 149.813 (seconds)
The filter is WHITE.
The uvot region is centered at (302.3128,-36.8979) with a roll angle of 263.5
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 (302.3420,-36.9030) with a radius of 3.000 arc min
This is 1.433 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 7.13 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (302.3180,-36.8966) with a radius of 0.023 arc min
This is 0.260 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 3 of trigger 871316
find_uvot_ag.pl vrs. 2017-02-17 fem started at 181110d17h04m44s082464usUT
Observation start time is 2018-11-10T08:58:14.4
Examining file ./871316_g882_uvot_catalog_image.fits
The exposure ID is 563533094
The exposure is 149.813 sec.
The bin size is 2 pixels
The filter is WHITE
There are 17 detected source(s) for 871316_g882
Aspect correction adds -0.00036 degrees (-0.086 sec of time = -1.03 arc sec) to RA
Aspect correction adds 0.00012 degrees ( 0.45 arcsec) to Dec
Total aspect correction is 1.12 arcsec
Star catalogs centered at 302.3135 , -36.8977 with radius 2.68 arc min.
n_usno: 132 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.48678
RA DEC Mag Color
bright star 0: 302.34470 (20:09:22.73) -36.88558 (-36:53:08.1) 11.49 USNO-V
Mean distance difference (CAT_DELTA) for 13 matched entries is 0.406" for 871316_g882
Mean and std. dev of mag. difference (MAG_DELTA) are 0.853 and 0.935 for 871316_g882
Found 4 entries without IDs and 3 entries that are acceptable afterglow candidates for 871316_g882.
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.
1 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=302.3420 (20:09:22.08) DEC=-36.9030 (-36:54:10.8)
XRT distances are from RA=302.3180 (20:09:16.32) DEC=-36.8966 (-36:53:47.9)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 871316_g882 with genie
ra=302.31768 (20:09:16.24) dec=-36.89662 (-36:53:47.8) +/- 0.6" mag=15.09+/-0.14
dist=0.9 REFID=9 major=0.9 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
302.3190 -36.8955 5.4 -1 USNO-B1 20.30 18.80 19.47
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 4 in the list of sources is a candidate afterglow for 871316_g882 with genie
ra=302.33308 (20:09:19.94) dec=-36.88532 (-36:53:07.1) +/- 0.6" mag=17.83+/-0.14
dist=59.6 REFID=6 major=5.0 minor=1.0 flag=19 (neighbor+blended+aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 69.8 arc sec from the BAT position.
Found 3 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
302.3382 -36.8863 15.2 -1 USNO-B1 18.89 18.46 18.65
302.3335 -36.8801 18.8 -1 USNO-B1 18.68 17.50 18.02
302.3394 -36.8857 18.2 -1 USNO-B1 99.99 19.03 99.99
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 5.0
-----------------
Entry 10 in the list of sources is a candidate afterglow for 871316_g882 with genie
ra=302.33323 (20:09:19.98) dec=-36.88063 (-36:52:50.3) +/- 0.9" mag=20.45+/-0.25
dist=72.4 REFID=3 major=0.8 minor=0.4 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 85.3 arc sec from the BAT position.
This source is near the edge of image (0.989)
Found 2 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
302.3335 -36.8801 2.1 -1 USNO-B1 18.68 17.50 18.02 *
302.3356 -36.8763 17.1 -1 USNO-B1 20.79 19.81 20.25
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" or brighter than 12 mag
Found 1 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
302.3190 -36.8955 4.9 -1 USNO-B1 20.30 18.80 19.47
The closest star is 4.86" away.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=302.31768 (20:09:16.24) dec=-36.89662 (-36:53:47.8) +/- 0.6" mag=15.09+/-0.14 dist=0.9 REFID=9 flag=0
There are 97619.320 counts in the bkg source region of 5954.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 16.396 counts/pixel (5-sig UL in 4" is 19.83 mag) for 871316_g882
There are 8778.4795 counts in the src source region of 50.000000 pixels.
Rate in src region with 4 arcsec radius is 175.570 counts/pixel for 871316_g882
There are 20895.789 counts in the cand_src_bkg source region of 1247.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 16.757 counts/pixel (5-sig UL in 4" is 19.82 mag) for 871316_g882
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 20.39, 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: 871316_563533094_181110d17h04m44s082464usUT_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(302.3128,-36.8979,45")
fk5;-circle(302.31767802403,-36.8966174380013,6")
fk5;-circle(302.319621050248,-36.9075592055483,6")
fk5;-circle(302.300505850682,-36.9033902995436,6")
fk5;-circle(302.297079315043,-36.9015155312681,6")
Region file: 871316_563533094_181110d17h04m44s082464usUT_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(302.31767802403,-36.8966174380013,4")
Region file: 871316_563533094_181110d17h04m44s082464usUT_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(302.31767802403,-36.8966174380013,25")
fk5;-circle(302.31767802403,-36.8966174380013,15")
image paragraph message for exposure 3 of trigger 871316
Catalogued source 4.9" from XRT position may affect AG photometry.
------ Start for Possible Stand-alone Circular ----
In response to GRB181110 (Swift/BAT trigger 871316) at 08:43:31 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 861 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 20:09:16.24 = 302.31768
DEC(J2000) = -36:53:47.8 = -36.89662
with a 90%-confidence error radius of about 0.61 arc sec. This position is 0.9
arc sec. from the center of the XRT error circle. The estimated magnitude is
15.09 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.07.
------- notes for trigger 871316 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 181110d17h04m48s208708usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=871316
-expid=563533094 -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/871316/
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 563533094.4208 or about 2018:314:08:58:09 UT
Found 1732 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 14% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 29 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 17 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
20.39 mag. Found 128 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 12% 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?
563533094 860 WHITE 302.31797 -36.89663 15.64/19.2 0.1 srclist Yes
563533094 860 WHITE 302.31768 -36.89662 15.09/20.4 0.9 image Yes
List afterglow candidates for other finding charts.
563532305 71 WHITE 302.31786 -36.89680 18.89/19.2 0.7 srclist Yes
563532305 71 WHITE 302.31782 -36.89661 18.39/20.3 0.5 image Yes
563532517 283 U 302.31751 -36.89675 17.19/18.1 1.5 srclist Yes
563532517 283 U 302.31765 -36.89661 16.62/20.2 1.0 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -36.89662
GRB_ERROR: 0.61
GRB_RA: 302.31768
IMAGE_START_TIME: 08:58:09
MAGNITUDE: 15.09
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT