image overlap message for exposure 1 of trigger 933515
uvot_overlap.pl vrs. 2010-12-20b fem started at 191106d15h44m50s267187usUT
The observation of trigger 933515 started 2019-11-06T14:17:58.4
Examining file ./933515_g154_uvot_sky_image.fits
The exposure ID is 594742678
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (269.3457,46.0478) with a roll angle of 227.5
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 (269.3500,46.0520) with a radius of 3.000 arc min
This is 0.309 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 (269.3356,46.0352) with a radius of 0.038 arc min
This is 0.862 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 933515
find_uvot_ag.pl vrs. 2017-02-17 fem started at 191106d15h44m54s604556usUT
Observation start time is 2019-11-06T14:17:58.4
Examining file ./933515_g154_uvot_catalog_image.fits
The exposure ID is 594742678
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 11 detected source(s) for 933515_g154
Aspect correction adds -0.00173 degrees (-0.415 sec of time = -4.32 arc sec) to RA
Aspect correction adds -0.00099 degrees (-3.56 arcsec) to Dec
Total aspect correction is 5.60 arcsec
Star catalogs centered at 269.3448 , 46.0505 with radius 2.75 arc min.
n_usno: 111 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 9 matched entries is 0.270" for 933515_g154
Mean and std. dev of mag. difference (MAG_DELTA) are 0.500 and 0.362 for 933515_g154
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 933515_g154.
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=269.3500 (17:57:24.00) DEC=46.0520 (+46:03:07.2)
XRT distances are from RA=269.3356 (17:57:20.55) DEC=46.0352 (+46:02:06.9)
-----------------
Entry 9 in the list of sources is a candidate afterglow for 933515_g154 with genie
ra=269.37493 (17:57:29.98) dec=46.03016 (+46:01:48.6) +/- 0.8" mag=19.68+/-0.22
dist=99.9 REFID=3 major=1.0 minor=0.4 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 100.3 arc sec from the BAT position.
This source is near the edge of image (0.966)
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
269.3704 46.0330 15.3 -1 USNO-B1 19.56 17.97 18.68
269.3736 46.0347 16.5 -1 USNO-B1 19.31 18.48 18.85
269.3753 46.0295 2.5 -1 USNO-B1 17.70 17.07 17.35 *
269.3776 46.0269 13.4 -1 USNO-B1 99.99 19.94 99.99
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 10 in the list of sources is a candidate afterglow for 933515_g154 with genie
ra=269.32031 (17:57:16.87) dec=46.03180 (+46:01:54.5) +/- 0.6" mag=17.83+/-0.15
dist=40.2 REFID=1 major=2.1 minor=1.6 flag=2 (blended)
*** The position of this source is inconsistent with the XRT position.
The position is 103.9 arc sec from the BAT position.
This source is near the edge of image (0.902)
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
269.3245 46.0335 12.1 -1 USNO-B1 20.30 19.70 19.96
269.3281 46.0312 19.6 -1 USNO-B1 21.03 19.73 20.31
269.3173 46.0312 7.7 -1 USNO-B1 13.71 13.15 13.40
269.3136 46.0311 17.0 -1 USNO-B1 20.84 19.97 20.36
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 2.1
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
269.3339 46.0331 8.9 -1 USNO-B1 19.79 18.99 19.35
The closest star is 8.91" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=269.33391 (17:57:20.14) dec=46.03315 (+46:01:59.3) +/- 0.9" mag=20.14+/-0.26 dist=8.7 REFID=10 flag=0
There are 12812.318 counts in the bkg source region of 6079.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 2.108 counts/pixel (5-sig UL in 4" is 20.06 mag) for 933515_g154
There are 430.15192 counts in the xrt source region of 208.00000 pixels.
Rate in xrt region with 8 arcsec radius is 2.068 counts/pixel for 933515_g154
There are 2540.8503 counts in the xrt_bkg source region of 1184.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 2.146 counts/pixel (5-sig UL in 4" is 20.05 mag) for 933515_g154
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 20.61, 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: 933515_594742678_191106d15h44m54s604556usUT_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(269.3457,46.0478,45")
fk5;-circle(269.350412937425,46.0508659483916,6")
fk5;-circle(269.340952784876,46.057848001739,6")
fk5;-circle(269.327162526172,46.0432128221478,6")
Region file: 933515_594742678_191106d15h44m54s604556usUT_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(269.33562,46.03525,8")
Region file: 933515_594742678_191106d15h44m54s604556usUT_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(269.33562,46.03525,25")
fk5;-circle(269.33562,46.03525,15")
fk5;-circle(269.345216650705,46.0331185124999,6")
fk5;-circle(269.324634013062,46.0334036440942,6")
image paragraph message for exposure 1 of trigger 933515
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 GRB191106 (Swift/BAT trigger 933515) at 14:15:23 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
130 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 19.2 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 18.0 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.06.
------- notes for trigger 933515 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 191106d15h44m58s008175usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=933515
-expid=594742678 -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/933515/
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 594742678.38784 or about 2019:310:14:17:53 UT
Found 1252 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 10% of the srclist region. Found 130 sources in
srclist catalog. Found 51 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.12 mag.
Found 11 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 2 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.61 mag. Found 107 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 9% of the Genie image region.
Genie image analysis:
Found 12812.3 counts in the large background region of 6079.0 pixels or a rate
of 2.108 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 20.10 mag. for a
4-arcsec aperture.
Found 430.2 counts in the XRT position region of 208.0 pixels or a rate of
2.068 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.065 +/- 0.090 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.271 cps or 19.80 mag. The closest srclist
source has ra= 269.3271 dec= 46.0431 mag=18.67 sep=35.40".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 269.3339 dec= 46.0331 mag=20.14 sep=8.69". The closest Genie
source has ra= 269.3339 dec= 46.0331 mag=20.14 sep=8.69".
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 250 seconds with the U filter starting
130 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 17:57:20.14 = 269.33391
DEC(J2000) = +46:01:59.3 = 46.03315
with a 90%-confidence error radius of about 0.91 arc sec. This position is 8.69
arc sec. from the center of the XRT error circle. The estimated magnitude is
20.14 with a 1-sigma error of about 0.26. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.06.
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?
594742678 130 U srclist found no candidates.
594742678 130 U image found no candidates.
List afterglow candidates for other finding charts.
594743409 861 U srclist found no candidates.
594743409 861 U image found no candidates.
594747533 4985 WHITE srclist found no candidates.
594747533 4985 ? image data are not available.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 46.03525
GRB_ERROR: 5.75
GRB_RA: 269.33562
IMAGE_START_TIME: 14:17:53
MAGNITUDE: 19.8
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT