image overlap message for exposure 3 of trigger 873539
uvot_overlap.pl vrs. 2010-12-20b fem started at 181126d11h49m07s386774usUT
The observation of trigger 873539 started 2018-11-26T10:08:58.9
Examining file ./873539_g889_uvot_sky_image.fits
The exposure ID is 564919738
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (152.3559,-29.6798) 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 0.262 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 0.600 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 3 of trigger 873539
find_uvot_ag.pl vrs. 2017-02-17 fem started at 181126d11h49m25s915348usUT
Observation start time is 2018-11-26T10:08:58.9
Examining file ./873539_g889_uvot_catalog_image.fits
The exposure ID is 564919738
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 11 detected source(s) for 873539_g889
Aspect correction adds 0.00037 degrees (0.089 sec of time = 1.16 arc sec) to RA
Aspect correction adds -0.00142 degrees (-5.09 arcsec) to Dec
Total aspect correction is 5.22 arcsec
Star catalogs centered at 152.3543 , -29.6796 with radius 2.53 arc min.
n_usno: 127 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 12 matched entries is 0.565" for 873539_g889
Mean and std. dev of mag. difference (MAG_DELTA) are 1.076 and 0.558 for 873539_g889
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 873539_g889.
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)
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=152.34910 (10:09:23.78) dec=-29.68523 (-29:41:06.8) +/- 0.6" mag=17.95+/-0.15 dist=8.3 REFID=9 flag=0
There are 2.2249059E+05 counts in the bkg source region of 5909.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 37.653 counts/pixel (5-sig UL in 4" is 19.38 mag) for 873539_g889
There are 7896.4858 counts in the xrt source region of 199.00000 pixels.
Rate in xrt region with 8 arcsec radius is 39.681 counts/pixel for 873539_g889
There are 45734.223 counts in the xrt_bkg source region of 1220.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 37.487 counts/pixel (5-sig UL in 4" is 19.38 mag) for 873539_g889
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 19.93, 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_564919738_181126d11h49m25s915348usUT_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(152.3559,-29.6798,45")
fk5;-circle(152.352520036729,-29.6782632554045,6")
fk5;-circle(152.351434458132,-29.6753224006784,6")
fk5;-circle(152.349103351925,-29.6852337623441,6")
fk5;-circle(152.349048693072,-29.6691810868377,6")
Region file: 873539_564919738_181126d11h49m25s915348usUT_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_564919738_181126d11h49m25s915348usUT_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(152.340296193568,-29.6898751995335,6")
image paragraph message for exposure 3 of trigger 873539
SRCLIST PROBLEM: srclist filled telemetry buffer
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 868 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 181126d11h49m29s193783usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=873539
-expid=564919738 -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 564919738.90176 or about 2018:330:10:08:53 UT
Found 1200 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 11% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 105 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 11 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 0 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
19.93 mag. Found 123 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 222490.6 counts in the large background region of 5909.0 pixels or a rate
of 37.653 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 19.38 mag. for a
4-arcsec aperture.
Found 7896.5 counts in the XRT position region of 199.0 pixels or a rate of
39.681 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 2.911 +/- 0.636 (1-sigma) cps or
18.62 mag and a range from 18.41 to 18.89 mag. The 3-sigma UL at the XRT
position is 4.820 cps or 18.07 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.74 mag. The closest
srclist source has ra= 152.3401 dec= -29.6902 mag=16.79 sep=27.95".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 152.3491 dec= -29.6852 mag=17.95 sep=8.27". The closest Genie
source has ra= 152.3491 dec= -29.6852 mag=17.95 sep=8.27".
This paragraph is only useful if the XRT position is grossly wrong. There are 6
candidate(s) in the srclist data with mag < 18.66 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=152.36126
(10:09:26.70), DEC=-29.70598 (-29:42:21.5) (J2000). It has a mag of 18.08. It
is 102.3" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 868 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 10:09:26.70 = 152.36126
DEC(J2000) = -29:42:21.5 = -29.70598
with a 90%-confidence error radius of about 1.10 arc sec. The estimated
magnitude is 18.08 with a 1-sigma error of about 0.35. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.07.
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 868 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 10:09:23.78 = 152.34910
DEC(J2000) = -29:41:06.8 = -29.68523
with a 90%-confidence error radius of about 0.63 arc sec. This position is 8.27
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.95 with a 1-sigma error of about 0.15. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.07.
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?
564919738 867 WHITE srclist found no candidates.
564919738 867 WHITE image found no candidates.
List afterglow candidates for other finding charts.
564918949 78 WHITE srclist found no candidates.
564918949 78 WHITE image found no candidates.
564919162 291 U srclist found no candidates.
564919162 291 U 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: 10:08:53
MAGNITUDE: 18.1
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT