image overlap message for exposure 2 of trigger 885807
uvot_overlap.pl vrs. 2010-12-20b fem started at 190126d12h16m14s366006usUT
The observation of trigger 885807 started 2019-01-26T12:09:35.5
Examining file 885807_g5501_uvot_sky_image.fits
The exposure ID is 570197375
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (207.0203,-63.2651) with a roll angle of 108.7
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 (207.0030,-63.2650) with a radius of 3.000 arc min
This is 0.466 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 (207.0475,-63.2529) with a radius of 0.100 arc min
This is 1.038 arc min from the center of the uvot region
The area of the XRT error circle is 0.031 sq. arc min
The UVOT/XRT overlap is 0.031 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 885807
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190126d12h16m17s157383usUT
Observation start time is 2019-01-26T12:09:35.5
Examining file 885807_g5501_uvot_catalog_image.fits
The exposure ID is 570197375
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 60 detected source(s) for 885807_g5501
Aspect correction adds 0.00016 degrees (0.038 sec of time = 0.26 arc sec) to RA
Aspect correction adds -0.00114 degrees (-4.12 arcsec) to Dec
Total aspect correction is 4.13 arcsec
Star catalogs centered at 207.0229 , -63.2642 with radius 3.19 arc min.
n_usno: 935 n_gsc: 0
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 10.77
RA DEC Mag Color
bright star 0: 207.10769 (13:48:25.84) -63.26928 (-63:16:09.4) 11.74 USNO-V
bright star 1: 206.93171 (13:47:43.61) -63.23659 (-63:14:11.7) 10.77 USNO-R
Mean distance difference (CAT_DELTA) for 59 matched entries is 0.608" for 885807_g5501
Mean and std. dev of mag. difference (MAG_DELTA) are 1.460 and 0.559 for 885807_g5501
Found 5 entries without IDs and 5 entries that are acceptable afterglow candidates for 885807_g5501.
Acceptable entries have no ID, XRT distances < 15", 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=207.0030 (13:48:00.72) DEC=-63.2650 (-63:15:54.0)
XRT distances are from RA=207.0475 (13:48:11.40) DEC=-63.2529 (-63:15:10.4)
-----------------
Entry 10 in the list of sources is a candidate afterglow for 885807_g5501 with genie
ra=207.04233 (13:48:10.16) dec=-63.26413 (-63:15:50.9) +/- 0.8" mag=20.00+/-0.20
dist=41.3 REFID=27 major=1.0 minor=0.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 63.8 arc sec from the BAT position.
Found 12 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
207.0328 -63.2618 17.6 -1 USNO-B1 18.28 16.77 17.44
207.0333 -63.2618 16.9 -1 USNO-B1 20.13 16.72 18.23
207.0358 -63.2622 12.6 -1 USNO-B1 20.62 18.17 19.26
207.0394 -63.2623 8.2 -1 USNO-B1 17.96 17.35 17.62
207.0392 -63.2610 12.3 -1 USNO-B1 18.37 18.75 18.58
207.0405 -63.2626 6.4 -1 USNO-B1 99.99 16.33 99.99
207.0420 -63.2638 1.2 -1 USNO-B1 19.70 16.81 18.09 *
207.0404 -63.2591 18.4 -1 USNO-B1 14.77 14.21 14.46
207.0487 -63.2629 11.2 -1 USNO-B1 19.29 16.00 17.46
207.0492 -63.2682 18.4 -1 USNO-B1 21.09 19.09 19.98
207.0507 -63.2611 17.4 -1 USNO-B1 15.86 18.32 17.23
207.0531 -63.2648 17.6 -1 USNO-B1 20.41 17.71 18.91
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 27 in the list of sources is a candidate afterglow for 885807_g5501 with genie
ra=207.05345 (13:48:12.83) dec=-63.27453 (-63:16:28.3) +/- 0.6" mag=17.12+/-0.14
dist=78.5 REFID=44 major=1.0 minor=0.9 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 88.6 arc sec from the BAT position.
Found 8 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
207.0445 -63.2719 17.3 -1 USNO-B1 99.99 18.24 99.99
207.0458 -63.2713 17.0 -1 USNO-B1 20.21 18.51 19.26
207.0526 -63.2704 14.8 -1 USNO-B1 18.38 18.28 18.32
207.0434 -63.2759 17.1 -1 USNO-B1 16.58 15.38 15.92
207.0426 -63.2762 18.5 -1 USNO-B1 99.99 16.62 99.99
207.0521 -63.2788 15.5 -1 USNO-B1 18.96 17.16 17.96
207.0601 -63.2753 11.1 -1 USNO-B1 19.00 20.94 20.08
207.0586 -63.2775 13.5 -1 USNO-B1 17.46 16.49 16.92
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 34 in the list of sources is a candidate afterglow for 885807_g5501 with genie
ra=207.03582 (13:48:08.60) dec=-63.27723 (-63:16:38.0) +/- 0.7" mag=19.39+/-0.17
dist=89.6 REFID=51 major=0.9 minor=0.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 69.0 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
207.0330 -63.2770 4.7 -1 USNO-B1 99.99 17.27 99.99
207.0349 -63.2771 1.6 -1 USNO-B1 19.23 17.21 18.11 *
207.0434 -63.2759 13.1 -1 USNO-B1 16.58 15.38 15.92
207.0426 -63.2762 11.6 -1 USNO-B1 99.99 16.62 99.99
207.0340 -63.2797 9.5 -1 USNO-B1 99.99 18.59 99.99
207.0387 -63.2809 14.2 -1 USNO-B1 15.27 13.70 14.40
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 56 in the list of sources is a candidate afterglow for 885807_g5501 with genie
ra=206.98331 (13:47:55.99) dec=-63.27741 (-63:16:38.7) +/- 0.6" mag=18.16+/-0.15
dist=136.3 REFID=47 major=2.5 minor=2.2 flag=1 (neighbor)
*** The position of this source is inconsistent with the XRT position.
The position is 54.9 arc sec from the BAT position.
This source is near the edge of image (0.952)
Found 12 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
206.9932 -63.2744 19.3 -1 USNO-B1 18.49 16.37 17.31
206.9897 -63.2742 15.5 -1 USNO-B1 15.08 13.41 14.15
206.9911 -63.2788 13.7 -1 USNO-B1 16.41 15.05 15.65
206.9853 -63.2777 3.4 -1 USNO-B1 20.35 17.71 18.88 *
206.9773 -63.2732 18.1 -1 USNO-B1 99.99 14.18 99.99
206.9873 -63.2800 11.4 -1 USNO-B1 99.99 16.70 99.99
206.9768 -63.2732 18.5 -1 USNO-B1 15.50 13.80 14.55
206.9869 -63.2802 11.7 -1 USNO-B1 19.59 16.95 18.12
206.9795 -63.2788 7.9 -1 USNO-B1 18.58 15.75 17.01
206.9773 -63.2789 11.2 -1 USNO-B1 19.57 15.37 17.23
206.9717 -63.2769 18.9 -1 USNO-B1 13.27 11.97 12.55 *
206.9719 -63.2778 18.5 -1 USNO-B1 13.30 13.29 13.29
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 63 in the list of sources is a candidate afterglow for 885807_g5501 with genie
ra=206.95462 (13:47:49.11) dec=-63.26592 (-63:15:57.3) +/- 0.6" mag=18.50+/-0.15
dist=157.5 REFID=30 major=0.8 minor=0.7 flag=19 (neighbor+blended+aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 78.4 arc sec from the BAT position.
This source is near the edge of image (1.026)
Found 11 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
206.9576 -63.2676 7.8 -1 USNO-B1 15.20 13.68 14.35
206.9574 -63.2674 6.8 -1 USNO-B1 14.60 13.74 14.12
206.9565 -63.2675 6.4 -1 USNO-B1 15.17 13.21 14.08
206.9548 -63.2606 19.0 -1 USNO-B1 20.25 19.34 19.74
206.9562 -63.2713 19.6 -1 USNO-B1 16.57 14.38 15.35
206.9535 -63.2667 3.5 -1 USNO-B1 99.99 12.75 99.99 *
206.9521 -63.2664 4.4 -1 USNO-B1 15.44 13.10 14.14 *
206.9518 -63.2643 7.3 -1 USNO-B1 20.07 16.63 18.16
206.9515 -63.2632 11.1 -1 USNO-B1 19.54 16.97 18.11
206.9485 -63.2629 14.8 -1 USNO-B1 19.55 17.70 18.52
206.9428 -63.2654 19.2 -1 USNO-B1 16.49 14.70 15.49
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 4 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
207.0433 -63.2524 7.0 -1 USNO-B1 18.25 17.50 17.83
207.0472 -63.2521 2.9 -1 USNO-B1 17.03 16.55 16.76
207.0479 -63.2522 2.6 -1 USNO-B1 18.24 16.36 17.19
207.0440 -63.2507 9.8 -1 USNO-B1 19.60 17.48 18.42
The closest star is 2.64" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=207.04778 (13:48:11.47) dec=-63.25213 (-63:15:07.7) +/- 0.6" mag=18.29+/-0.15 dist=2.8 REFID=7 flag=0
Matched source ra=207.04425 (13:48:10.62) dec=-63.25065 (-63:15:02.3) +/- 0.8" mag=20.18+/-0.22 dist=9.7 REFID=6 flag=0
There are 80044.188 counts in the bkg source region of 5065.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 15.803 counts/pixel (5-sig UL in 4" is 19.85 mag) for 885807_g5501
There are 3864.9246 counts in the xrt source region of 202.00000 pixels.
Rate in xrt region with 8 arcsec radius is 19.133 counts/pixel for 885807_g5501
XRT source is too far (62.2046716254794") from center -- do not compute local background.
There are 1 candidate(s) outside XRT error circle with mag < 19.85
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.41, XRT distances < 15",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 885807_570197375_190126d12h16m17s157383usUT_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(207.0203,-63.2651,45")
fk5;-circle(207.04054038025,-63.259010827893,6")
fk5;-circle(207.048423327966,-63.2630035118325,6")
fk5;-circle(207.04232971988,-63.2641336916919,6")
fk5;-circle(207.021018887157,-63.2564405453816,6")
fk5;-circle(207.023007521612,-63.2602899070507,6")
fk5;-circle(207.016538401067,-63.2531721174187,6")
fk5;-circle(207.015225165458,-63.2582575794841,6")
fk5;-circle(207.028813296285,-63.2686583123163,6")
fk5;-circle(207.025038936908,-63.268032550825,6")
fk5;-circle(207.009706941116,-63.2632117067652,6")
fk5;-circle(207.012857005044,-63.2695552699014,6")
fk5;-circle(207.035822077232,-63.2772257714441,6")
fk5;-circle(206.996097386208,-63.2618134665864,6")
fk5;-circle(207.018660744284,-63.2787867708562,6")
fk5;-circle(206.997947685736,-63.2725749293667,6")
Region file: 885807_570197375_190126d12h16m17s157383usUT_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(207.0475,-63.2529,8")
image paragraph message for exposure 2 of trigger 885807
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: high density of stars
SRCLIST PROBLEM: high density of stars, srclist filled telemetry buffer
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
2 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 GRB190126 (Swift/BAT trigger 885807) at 10:37:53 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 5479 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. Because of the density of catalogued stars,
further analysis is required to report an upper limit for any afterglow in the
sub-image. The 8'x8' region for the list of sources generated on-board covers
100% of the XRT error circle. Because of the density of catalogued stars,
further analysis is required to report an upper limit for any afterglow in the
region. No correction has been made for the large, but uncertain, extinction
expected.
------- notes for trigger 885807 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190126d12h16m21s663056usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=885807
-expid=570197375 -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/885807/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for bat position. Unreliable extinction found for
xrt position. XRT position found for srclist. XRT position found for Genie
image. BAT position found.
UVOT exposure began at MET 570197375.50604 or about 2019:026:12:09:30 UT
Found 3164 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 60% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 23 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 60 source(s) in Genie image catalog. 2 source(s) are within 10.0" of the
xrt position. 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
20.41 mag. Found 931 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 63% of the Genie image region.
Genie image analysis:
Found 80044.2 counts in the large background region of 5065.0 pixels or a rate
of 15.803 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 19.85 mag. for a
4-arcsec aperture.
Found 3864.9 counts in the XRT position region of 202.0 pixels or a rate of
19.133 counts/pixel in a radius of 8.0 arcsec. The net count rate (using large
background region) at the XRT position is 4.484 +/- 0.421 (1-sigma) cps or
18.15 mag and a range from 18.05 to 18.26 mag. The 3-sigma UL at the XRT
position is 5.748 cps or 17.88 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.58 mag. The closest
srclist source has ra= 207.0533 dec= -63.2568 mag=18.35 sep=16.74".
Found 2 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 207.0478 dec= -63.2521 mag=18.29 sep=2.80". The closest Genie
source has ra= 207.0478 dec= -63.2521 mag=18.29 sep=2.80".
This paragraph is only useful if the XRT position is grossly wrong. There are 1
candidate(s) in the image data with mag < 19.85 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=207.05345
(13:48:12.83), DEC=-63.27453 (-63:16:28.3) (J2000). It has a mag of 17.12. It
is 88.6" 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 5479 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 13:48:12.83 = 207.05345
DEC(J2000) = -63:16:28.3 = -63.27453
with a 90%-confidence error radius of about 0.61 arc sec. The estimated
magnitude is 17.12 with a 1-sigma error of about 0.14. No correction has been
made for the large, but uncertain, extinction expected.
This paragraph is only useful if the XRT position is grossly wrong. There are 1
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=207.05338
(13:48:12.81), DEC=-63.27435 (-63:16:27.7) (J2000). It has a mag of 17.90. It
is 88.2" 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 5479 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 13:48:12.81 = 207.05338
DEC(J2000) = -63:16:27.7 = -63.27435
with a 90%-confidence error radius of about 1.10 arc sec. The estimated
magnitude is 17.90 with a 1-sigma error of about 0.35. No correction has been
made for the large, but uncertain, extinction expected.
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 5479 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 13:48:11.47 = 207.04778
DEC(J2000) = -63:15:07.7 = -63.25213
with a 90%-confidence error radius of about 0.63 arc sec. This position is 2.80
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.29 with a 1-sigma error of about 0.15. No correction has been made for the
large, but uncertain, extinction expected.
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?
570197375 5479 WHITE srclist found no candidates.
570197375 5479 WHITE image found no candidates.
List afterglow candidates for other finding charts.
570194034 2138 ? srclist data are not available.
570194034 2138 WHITE image found no candidates.
------- Tokens for Quick GCN -------