image overlap message for exposure 2 of trigger 871316
uvot_overlap.pl vrs. 2010-12-20b fem started at 181110d17h04m23s294577usUT
The observation of trigger 871316 started 2018-11-10T08:48:37.5
Examining file ./871316_g305_uvot_sky_image.fits
The exposure ID is 563532517
The exposure time is 249.946 (seconds)
The filter is U.
The uvot region is centered at (302.3135,-36.8980) 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 1.399 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 7.15 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 0.229 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 2 of trigger 871316
find_uvot_ag.pl vrs. 2017-02-17 fem started at 181110d17h04m33s617258usUT
Observation start time is 2018-11-10T08:48:37.5
Examining file ./871316_g305_uvot_catalog_image.fits
The exposure ID is 563532517
The exposure is 249.946 sec.
The bin size is 2 pixels
The filter is U
There are 10 detected source(s) for 871316_g305
Aspect correction adds -0.00077 degrees (-0.185 sec of time = -2.22 arc sec) to RA
Aspect correction adds 0.00004 degrees ( 0.16 arcsec) to Dec
Total aspect correction is 2.23 arcsec
Star catalogs centered at 302.3200 , -36.9017 with radius 2.53 arc min.
n_usno: 120 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 9 matched entries is 0.480" for 871316_g305
Mean and std. dev of mag. difference (MAG_DELTA) are 0.906 and 0.699 for 871316_g305
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 871316_g305.
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.
0 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_g305 with genie
ra=302.31765 (20:09:16.24) dec=-36.89661 (-36:53:47.8) +/- 0.6" mag=16.62+/-0.14
dist=1.0 REFID=5 major=1.0 minor=0.9 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 11 of 11 good pixels
##### This source remains a candidate #####
It has no entries within 3.5" 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=302.31765 (20:09:16.24) dec=-36.89661 (-36:53:47.8) +/- 0.6" mag=16.62+/-0.14 dist=1.0 REFID=5 flag=0
There are 28368.957 counts in the bkg source region of 5998.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 4.730 counts/pixel (5-sig UL in 4" is 19.62 mag) for 871316_g305
There are 1173.8622 counts in the src source region of 49.000000 pixels.
Rate in src region with 4 arcsec radius is 23.956 counts/pixel for 871316_g305
There are 5948.7900 counts in the cand_src_bkg source region of 1247.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 4.770 counts/pixel (5-sig UL in 4" is 19.62 mag) for 871316_g305
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 20.18, 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_563532517_181110d17h04m33s617258usUT_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(302.3135,-36.8980,45")
fk5;-circle(302.317653780212,-36.8966103145764,6")
fk5;-circle(302.31971573922,-36.9074406266415,6")
fk5;-circle(302.300568966674,-36.9033184824811,6")
Region file: 871316_563532517_181110d17h04m33s617258usUT_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(302.317653780212,-36.8966103145764,4")
Region file: 871316_563532517_181110d17h04m33s617258usUT_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(302.317653780212,-36.8966103145764,25")
fk5;-circle(302.317653780212,-36.8966103145764,15")
image paragraph message for exposure 2 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 250 seconds with the U filter starting
284 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 = 302.31765
DEC(J2000) = -36:53:47.8 = -36.89661
with a 90%-confidence error radius of about 0.62 arc sec. This position is 1.0
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.62 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 181110d17h04m39s114032usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=871316
-expid=563532517 -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 563532517.49846 or about 2018:314:08:48:32 UT
Found 774 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 14% of the srclist region. Found 66 sources in
srclist catalog. Found 21 srclist source(s) without IDs. There are 1 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.12 mag.
Found 10 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
20.18 mag. Found 116 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?
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
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
563533094 860 WHITE 302.31797 -36.89663 15.64/19.2 0.9 srclist Yes
563533094 860 WHITE 302.31768 -36.89662 15.09/20.4 0.7 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -36.89661
GRB_ERROR: 0.62
GRB_RA: 302.31765
IMAGE_START_TIME: 08:48:32
MAGNITUDE: 16.62
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT