image overlap message for exposure 2 of trigger 873539
uvot_overlap.pl vrs. 2010-12-20b fem started at 181126d11h49m06s684578usUT
The observation of trigger 873539 started 2018-11-26T09:59:22.2
Examining file ./873539_g313_uvot_sky_image.fits
The exposure ID is 564919162
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (152.3552,-29.6794) 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 0.220 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 0.599 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 2 of trigger 873539
find_uvot_ag.pl vrs. 2017-02-17 fem started at 181126d11h49m18s197362usUT
Observation start time is 2018-11-26T09:59:22.2
Examining file ./873539_g313_uvot_catalog_image.fits
The exposure ID is 564919162
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 9 detected source(s) for 873539_g313
Aspect correction adds 0.00026 degrees (0.063 sec of time = 0.82 arc sec) to RA
Aspect correction adds -0.00121 degrees (-4.37 arcsec) to Dec
Total aspect correction is 4.44 arcsec
Star catalogs centered at 152.3543 , -29.6849 with radius 2.54 arc min.
n_usno: 130 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 4 matched entries is 0.937" for 873539_g313
Mean and std. dev of mag. difference (MAG_DELTA) are 1.737 and 0.469 for 873539_g313
Found 5 entries without IDs and 5 entries that are acceptable afterglow candidates for 873539_g313.
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 55 per cent of entries have no IDs.
-----------------
Entry 1 in the list of sources is a candidate afterglow for 873539_g313 with genie
ra=152.34173 (10:09:22.01) dec=-29.68657 (-29:41:11.7) +/- 0.7" mag=16.45+/-0.14
dist=21.4 REFID=6 major=1.4 minor=1.0 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 39.8 arc sec from the BAT position.
Found 6 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
152.3454 -29.6821 19.7 -1 USNO-B1 99.99 19.62 99.99
152.3428 -29.6905 14.6 -1 USNO-B1 21.34 19.93 20.56
152.3404 -29.6871 4.6 -1 USNO-B1 20.93 20.04 20.44
152.3412 -29.6899 11.9 -1 USNO-B1 19.20 18.47 18.79
152.3417 -29.6908 15.3 -1 USNO-B1 19.02 17.41 18.12
152.3401 -29.6899 13.1 -1 USNO-B1 13.81 12.71 13.20
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 3 in the list of sources is a candidate afterglow for 873539_g313 with genie
ra=152.33917 (10:09:21.40) dec=-29.67051 (-29:40:13.8) +/- 0.7" mag=15.10+/-0.14
dist=67.7 REFID=3 major=1.3 minor=1.0 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 48.0 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
152.3419 -29.6731 12.7 -1 USNO-B1 19.99 18.18 18.98
152.3430 -29.6715 12.7 -1 USNO-B1 18.69 17.79 18.19
152.3377 -29.6737 12.4 -1 USNO-B1 13.05 12.00 12.46 *
152.3347 -29.6741 19.0 -1 USNO-B1 18.98 17.61 18.22
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 4 in the list of sources is a candidate afterglow for 873539_g313 with genie
ra=152.34036 (10:09:21.69) dec=-29.68941 (-29:41:21.9) +/- 0.7" mag=15.58+/-0.14
dist=26.4 REFID=7 major=1.8 minor=1.2 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 50.1 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
152.3428 -29.6905 8.6 -1 USNO-B1 21.34 19.93 20.56
152.3404 -29.6871 8.2 -1 USNO-B1 20.93 20.04 20.44
152.3412 -29.6899 3.0 -1 USNO-B1 19.20 18.47 18.79 *
152.3417 -29.6908 6.6 -1 USNO-B1 19.02 17.41 18.12
152.3401 -29.6899 2.1 -1 USNO-B1 13.81 12.71 13.20 *
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 5 in the list of sources is a candidate afterglow for 873539_g313 with genie
ra=152.37224 (10:09:29.34) dec=-29.68690 (-29:41:12.8) +/- 0.8" mag=17.52+/-0.15
dist=74.3 REFID=8 major=1.6 minor=1.1 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 72.3 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
152.3711 -29.6837 12.1 -1 USNO-B1 20.79 20.85 20.82
152.3709 -29.6901 12.1 -1 USNO-B1 15.71 14.63 15.11
152.3757 -29.6861 11.2 -1 USNO-B1 19.93 18.17 18.95
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 1.6
-----------------
Entry 7 in the list of sources is a candidate afterglow for 873539_g313 with genie
ra=152.36289 (10:09:27.09) dec=-29.70146 (-29:42:05.3) +/- 0.8" mag=16.80+/-0.14
dist=67.5 REFID=1 major=1.3 minor=0.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 89.0 arc sec from the BAT position.
This source is near the edge of image (0.929)
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
152.3658 -29.6969 18.7 -1 USNO-B1 20.34 20.99 20.70
152.3682 -29.6988 19.1 -1 USNO-B1 19.90 18.98 19.39
152.3618 -29.7025 5.3 -1 USNO-B1 21.79 20.24 20.93
152.3616 -29.7048 12.5 -1 USNO-B1 14.99 13.88 14.37
*** If XRT position is correct, then this is NOT the afterglow
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:
There are 40520.539 counts in the bkg source region of 6197.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 6.539 counts/pixel (5-sig UL in 4" is 19.45 mag) for 873539_g313
There are 1342.1316 counts in the xrt source region of 203.00000 pixels.
Rate in xrt region with 8 arcsec radius is 6.611 counts/pixel for 873539_g313
There are 7167.9692 counts in the xrt_bkg source region of 1118.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 6.411 counts/pixel (5-sig UL in 4" is 19.46 mag) for 873539_g313
There are 2 candidate(s) outside XRT error circle with mag < 19.44
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.00, 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_564919162_181126d11h49m18s197362usUT_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(152.3552,-29.6794,45")
fk5;-circle(152.351566495811,-29.6749772133327,6")
fk5;-circle(152.341725737589,-29.6865725588317,6")
Region file: 873539_564919162_181126d11h49m18s197362usUT_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_564919162_181126d11h49m18s197362usUT_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(152.341725737589,-29.6865725588317,6")
fk5;-circle(152.340363163491,-29.6894101420778,6")
image paragraph message for exposure 2 of trigger 873539
SRCLIST PROBLEM: srclist filled telemetry buffer
------ 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 250 seconds with the U filter starting
292 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
0.07.
------- notes for trigger 873539 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 181126d11h49m21s533222usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=873539
-expid=564919162 -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 564919162.21108 or about 2018:330:09:59:17 UT
Found 1246 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 88 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 9 source(s) in Genie image catalog. Found 5 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.00 mag. Found 126 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 40520.5 counts in the large background region of 6197.0 pixels or a rate
of 6.539 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 19.49 mag. for a
4-arcsec aperture.
Found 1342.1 counts in the XRT position region of 203.0 pixels or a rate of
6.611 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.162 +/- 0.159 (1-sigma) cps or
20.35 mag and a range from 19.61 to 24.56 mag. The 3-sigma UL at the XRT
position is 0.639 cps or 18.87 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.36 mag. The closest
srclist source has ra= 152.3419 dec= -29.6862 mag=17.56 sep=21.22". The closest
Genie source has ra= 152.3417 dec= -29.6866 mag=16.45 sep=21.43".
This paragraph is only useful if the XRT position is grossly wrong. There are 2
candidate(s) in the image data with mag < 19.44 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=152.34173
(10:09:22.02), DEC=-29.68657 (-29:41:11.7) (J2000). It has a mag of 16.45. It
is 39.8" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 250 seconds with the U filter starting
292 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 10:09:22.02 = 152.34173
DEC(J2000) = -29:41:11.7 = -29.68657
with a 90%-confidence error radius of about 0.75 arc sec. The estimated
magnitude is 16.45 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.
This paragraph is only useful if the XRT position is grossly wrong. There are 1
candidate(s) in the srclist data with mag < 17.56 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=152.32658
(10:09:18.38), DEC=-29.72920 (-29:43:45.1) (J2000). It has a mag of 17.46. It
is 196.2" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 250 seconds with the U filter starting
292 seconds after the BAT trigger. There is a candidate afterglow in the list
of sources generated on-board at
RA(J2000) = 10:09:18.38 = 152.32658
DEC(J2000) = -29:43:45.1 = -29.72920
with a 90%-confidence error radius of about 1.10 arc sec. The estimated
magnitude is 17.46 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.
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?
564919162 291 U srclist found no candidates.
564919162 291 U 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.
564919738 867 WHITE srclist found no candidates.
564919738 867 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -29.68747
GRB_ERROR: 5.75
GRB_RA: 152.34850
IMAGE_START_TIME: 09:59:17
MAGNITUDE: 18.9
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT