image overlap message for exposure 1 of trigger 873539
uvot_overlap.pl vrs. 2010-12-20b fem started at 181126d11h49m05s914625usUT
The observation of trigger 873539 started 2018-11-26T09:55:50.0
Examining file ./873539_g100_uvot_sky_image.fits
The exposure ID is 564918949
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (152.3601,-29.6781) with a roll angle of 108.3
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 (152.3510,-29.6790) with a radius of 3.000 arc min
This is 0.476 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 (152.3485,-29.6875) with a radius of 0.038 arc min
This is 0.824 arc min from the center of the uvot region
The area of the XRT error circle is 0.005 sq. arc min
The UVOT/XRT overlap is 0.005 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 873539
find_uvot_ag.pl vrs. 2017-02-17 fem started at 181126d11h49m10s244823usUT
Observation start time is 2018-11-26T09:55:50.0
Examining file ./873539_g100_uvot_catalog_image.fits
The exposure ID is 564918949
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 23 detected source(s) for 873539_g100
Aspect correction adds 0.00029 degrees (0.070 sec of time = 0.91 arc sec) to RA
Aspect correction adds -0.00101 degrees (-3.64 arcsec) to Dec
Total aspect correction is 3.76 arcsec
Star catalogs centered at 152.3606 , -29.6788 with radius 2.61 arc min.
n_usno: 133 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 20 matched entries is 0.817" for 873539_g100
Mean and std. dev of mag. difference (MAG_DELTA) are 0.658 and 0.447 for 873539_g100
Found 6 entries without IDs and 6 entries that are acceptable afterglow candidates for 873539_g100.
Acceptable entries have no ID, XRT distances < 5.75", 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=152.3510 (10:09:24.24) DEC=-29.6790 (-29:40:44.4)
XRT distances are from RA=152.3485 (10:09:23.64) DEC=-29.6875 (-29:41:14.9)
*** WARNING 26 per cent of entries have no IDs.
-----------------
Entry 6 in the list of sources is a candidate afterglow for 873539_g100 with genie
ra=152.33731 (10:09:20.95) dec=-29.68199 (-29:40:55.2) +/- 0.8" mag=20.11+/-0.20
dist=40.2 REFID=17 major=1.1 minor=1.0 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 44.2 arc sec from the BAT position.
Found 4 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
152.3376 -29.6775 16.1 -1 USNO-B1 21.19 18.01 19.42
152.3373 -29.6822 0.8 -1 USNO-B1 19.83 19.55 19.67 *
152.3318 -29.6830 17.7 -1 USNO-B1 17.57 15.82 16.60
152.3312 -29.6828 19.5 -1 USNO-B1 18.98 18.24 18.57
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 9 in the list of sources is a candidate afterglow for 873539_g100 with genie
ra=152.33626 (10:09:20.70) dec=-29.67767 (-29:40:39.6) +/- 0.6" mag=19.02+/-0.16
dist=52.1 REFID=15 major=3.8 minor=2.5 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 46.4 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
152.3376 -29.6775 4.2 -1 USNO-B1 21.19 18.01 19.42
152.3373 -29.6822 16.7 -1 USNO-B1 19.83 19.55 19.67
152.3377 -29.6737 14.9 -1 USNO-B1 13.05 12.00 12.46 *
152.3347 -29.6741 13.8 -1 USNO-B1 18.98 17.61 18.22
152.3320 -29.6749 16.6 -1 USNO-B1 21.91 19.43 20.53
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 10 in the list of sources is a candidate afterglow for 873539_g100 with genie
ra=152.33706 (10:09:20.90) dec=-29.67242 (-29:40:20.7) +/- 0.7" mag=19.29+/-0.16
dist=64.9 REFID=12 major=2.3 minor=0.7 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 49.6 arc sec from the BAT position.
Found 6 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
152.3430 -29.6715 19.0 -1 USNO-B1 18.69 17.79 18.19
152.3419 -29.6731 15.4 -1 USNO-B1 19.99 18.18 18.98
152.3376 -29.6775 18.5 -1 USNO-B1 21.19 18.01 19.42
152.3377 -29.6737 5.0 -1 USNO-B1 13.05 12.00 12.46 *
152.3347 -29.6741 9.5 -1 USNO-B1 18.98 17.61 18.22
152.3320 -29.6749 18.1 -1 USNO-B1 21.91 19.43 20.53
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 12 in the list of sources is a candidate afterglow for 873539_g100 with genie
ra=152.33822 (10:09:21.17) dec=-29.66932 (-29:40:09.5) +/- 0.6" mag=18.96+/-0.15
dist=72.8 REFID=6 major=2.1 minor=2.0 flag=2 (blended)
*** The position of this source is inconsistent with the XRT position.
The position is 53.1 arc sec from the BAT position.
This source is near the edge of image (0.873)
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
152.3430 -29.6715 17.1 -1 USNO-B1 18.69 17.79 18.19
152.3419 -29.6731 17.9 -1 USNO-B1 19.99 18.18 18.98
152.3377 -29.6737 15.9 -1 USNO-B1 13.05 12.00 12.46 *
152.3334 -29.6660 19.1 -1 USNO-B1 19.55 18.86 19.17
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" or brighter than 12 mag
-----------------
Entry 13 in the list of sources is a candidate afterglow for 873539_g100 with genie
ra=152.33407 (10:09:20.18) dec=-29.67645 (-29:40:35.2) +/- 0.6" mag=18.88+/-0.15
dist=60.1 REFID=14 major=4.2 minor=2.0 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 53.7 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
152.3376 -29.6775 11.7 -1 USNO-B1 21.19 18.01 19.42
152.3377 -29.6737 15.0 -1 USNO-B1 13.05 12.00 12.46 *
152.3347 -29.6741 8.7 -1 USNO-B1 18.98 17.61 18.22
152.3320 -29.6749 8.6 -1 USNO-B1 21.91 19.43 20.53
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 14 in the list of sources is a candidate afterglow for 873539_g100 with genie
ra=152.33436 (10:09:20.25) dec=-29.67150 (-29:40:17.4) +/- 0.6" mag=17.65+/-0.14
dist=72.5 REFID=7 major=4.7 minor=1.6 flag=18 (blended+aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 58.6 arc sec from the BAT position.
This source is near the edge of image (0.904)
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
152.3377 -29.6737 13.0 -1 USNO-B1 13.05 12.00 12.46 *
152.3347 -29.6741 9.4 -1 USNO-B1 18.98 17.61 18.22
152.3320 -29.6749 14.2 -1 USNO-B1 21.91 19.43 20.53
152.3334 -29.6660 19.9 -1 USNO-B1 19.55 18.86 19.17
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
152.3491 -29.6853 8.1 -1 USNO-B1 17.29 16.12 16.64
The closest star is 8.11" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=152.34920 (10:09:23.81) dec=-29.68505 (-29:41:06.2) +/- 0.6" mag=17.69+/-0.14 dist=9.0 REFID=19 flag=0
There are 73186.109 counts in the bkg source region of 5868.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 12.472 counts/pixel (5-sig UL in 4" is 19.98 mag) for 873539_g100
There are 2734.6531 counts in the xrt source region of 194.00000 pixels.
Rate in xrt region with 8 arcsec radius is 14.096 counts/pixel for 873539_g100
There are 15344.821 counts in the xrt_bkg source region of 1208.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 12.703 counts/pixel (5-sig UL in 4" is 19.97 mag) for 873539_g100
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 20.53, XRT distances < 5.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 873539_564918949_181126d11h49m10s244823usUT_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(152.3601,-29.6781,45")
fk5;-circle(152.352612473652,-29.6780792454006,6")
fk5;-circle(152.351434256244,-29.6751723671783,6")
fk5;-circle(152.349196334729,-29.6850543093781,6")
fk5;-circle(152.349296750562,-29.6686630230352,6")
fk5;-circle(152.364924240972,-29.6751378476615,6")
Region file: 873539_564918949_181126d11h49m10s244823usUT_xrt.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(152.34850,-29.68747,8")
Region file: 873539_564918949_181126d11h49m10s244823usUT_xrt_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(152.34850,-29.68747,25")
fk5;-circle(152.34850,-29.68747,15")
fk5;-circle(152.340350377036,-29.6895845884488,6")
image paragraph message for exposure 1 of trigger 873539
1 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB181126 (Swift/BAT trigger 873539) at 09:54:08 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 79 seconds after the BAT trigger. No credible afterglow candidate has
been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of
the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag.
The 8'x8' region for the list of sources generated on-board covers 100% of the
XRT error circle. The list of sources is typically complete to about 18 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.07.
------- notes for trigger 873539 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 181126d11h49m13s527198usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=873539
-expid=564918949 -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/873539/
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 564918949.99288 or about 2018:330:09:55:44 UT
Found 526 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 11% of the srclist region. Found 71 sources in
srclist catalog. Found 4 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 23 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 6 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.53 mag. Found 129 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 13% of the Genie image region.
Genie image analysis:
Found 73186.1 counts in the large background region of 5868.0 pixels or a rate
of 12.472 counts/pixel in a radius of 45.0 arcsec. Based on this background,
the typical 5-sigma UL at a random point in the Genie image is 19.98 mag. for a
4-arcsec aperture.
Found 2734.7 counts in the XRT position region of 194.0 pixels or a rate of
14.096 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 1.803 +/- 0.373 (1-sigma) cps or
19.14 mag and a range from 18.94 to 19.39 mag. The 3-sigma UL at the XRT
position is 2.922 cps or 18.62 mag.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 152.3490 dec= -29.6849 mag=18.51 sep=9.27".
The closest srclist source has ra= 152.3490 dec= -29.6849 mag=18.51 sep=9.27".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 152.3492 dec= -29.6851 mag=17.69 sep=8.97". The closest Genie
source has ra= 152.3492 dec= -29.6851 mag=17.69 sep=8.97".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 79 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 10:09:23.81 = 152.34920
DEC(J2000) = -29:41:06.2 = -29.68505
with a 90%-confidence error radius of about 0.62 arc sec. This position is 8.97
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.69 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.
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?
564918949 78 WHITE srclist found no candidates.
564918949 78 WHITE image found no candidates.
List afterglow candidates for other finding charts.
564919162 291 U srclist found no candidates.
564919162 291 U image found no candidates.
564919738 867 WHITE srclist found no candidates.
564919738 867 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -29.68747
GRB_ERROR: 5.75
GRB_RA: 152.34850
IMAGE_START_TIME: 09:55:44
MAGNITUDE: 18.6
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT