image overlap message for exposure 3 of trigger 1072706
uvot_overlap.pl vrs. 2010-12-20b fem started at 210910d10h38m54s924893usUT
The observation of trigger 1072706 started 2021-09-10T10:26:57.3
Examining file ./1072706_g901_uvot_sky_image.fits
The exposure ID is 652962417
The exposure time is 149.857 (seconds)
The filter is WHITE.
*** Warning -- found 2309 null pixels in the image.
The uvot region is centered at (238.7623,-54.0545) with a roll angle of 289.2
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 (238.7730,-54.0550) with a radius of 3.000 arc min
This is 0.378 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 (238.7878,-54.0619) with a radius of 0.032 arc min
This is 1.002 arc min from the center of the uvot region
The area of the XRT error circle is 0.003 sq. arc min
The UVOT/XRT overlap is 0.003 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 3 of trigger 1072706
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210910d10h39m32s679044usUT
Observation start time is 2021-09-10T10:26:57.3
Examining file ./1072706_g901_uvot_catalog_image.fits
The exposure ID is 652962417
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 53 detected source(s) for 1072706_g901
Aspect correction adds -0.00150 degrees (-0.360 sec of time = -3.17 arc sec) to RA
Aspect correction adds 0.00031 degrees ( 1.10 arcsec) to Dec
Total aspect correction is 3.35 arcsec
Star catalogs centered at 238.7594 , -54.0537 with radius 2.63 arc min.
n_usno: 393 n_gsc: 0
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 10.71494
RA DEC Mag Color
bright star 0: 238.80655 (15:55:13.57) -54.06409 (-54:03:50.7) 11.70 USNO-R
bright star 1: 238.79818 (15:55:11.56) -54.07666 (-54:04:36.0) 10.71 USNO-V
Mean distance difference (CAT_DELTA) for 46 matched entries is 0.524" for 1072706_g901
Mean and std. dev of mag. difference (MAG_DELTA) are 1.477 and 0.436 for 1072706_g901
Found 8 entries without IDs and 8 entries that are acceptable afterglow candidates for 1072706_g901.
Acceptable entries have no ID, XRT distances < 5", 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=238.7730 (15:55:05.52) DEC=-54.0550 (-54:03:18.0)
XRT distances are from RA=238.7878 (15:55:09.07) DEC=-54.0619 (-54:03:42.9)
-----------------
Entry 1 in the list of sources is a candidate afterglow for 1072706_g901 with genie
ra=238.77881 (15:55:06.91) dec=-54.05273 (-54:03:09.8) +/- 0.6" mag=16.08+/-0.14
dist=38.1 REFID=24 major=1.5 minor=1.1 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 14.7 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
238.7734 -54.0551 14.3 -1 USNO-B1 19.88 18.81 19.29
238.7782 -54.0548 7.4 -1 USNO-B1 99.99 19.37 99.99
238.7780 -54.0497 11.2 -1 USNO-B1 99.99 19.44 99.99
238.7795 -54.0525 1.6 -1 USNO-B1 15.52 14.04 14.70 *
238.7843 -54.0484 19.4 -1 USNO-B1 20.14 19.47 19.77
238.7863 -54.0558 19.3 -1 USNO-B1 17.20 16.10 16.59
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 1072706_g901 with genie
ra=238.77655 (15:55:06.37) dec=-54.04692 (-54:02:48.9) +/- 0.6" mag=16.08+/-0.14
dist=59.0 REFID=17 major=0.9 minor=0.9 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 30.0 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
238.7780 -54.0497 10.3 -1 USNO-B1 99.99 19.44 99.99
238.7755 -54.0464 2.8 -1 USNO-B1 14.60 13.14 13.79 *
238.7773 -54.0444 9.3 -1 USNO-B1 19.08 18.01 18.49
238.7843 -54.0484 17.2 -1 USNO-B1 20.14 19.47 19.77
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 7 in the list of sources is a candidate afterglow for 1072706_g901 with genie
ra=238.77419 (15:55:05.81) dec=-54.04581 (-54:02:44.9) +/- 0.6" mag=16.83+/-0.14
dist=64.7 REFID=16 major=0.9 minor=0.9 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 33.2 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
238.7676 -54.0498 19.9 -1 USNO-B1 16.88 15.61 16.17
238.7780 -54.0497 16.0 -1 USNO-B1 99.99 19.44 99.99
238.7755 -54.0464 3.6 -1 USNO-B1 14.60 13.14 13.79
238.7773 -54.0444 8.4 -1 USNO-B1 19.08 18.01 18.49
238.7747 -54.0410 17.5 -1 USNO-B1 19.34 17.91 18.55
238.7753 -54.0407 18.4 -1 USNO-B1 17.94 16.69 17.25
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 19 in the list of sources is a candidate afterglow for 1072706_g901 with genie
ra=238.77100 (15:55:05.04) dec=-54.07177 (-54:04:18.4) +/- 0.6" mag=18.05+/-0.15
dist=50.2 REFID=47 major=1.0 minor=0.9 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 60.5 arc sec from the BAT position.
Found 7 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
238.7679 -54.0672 17.8 -1 USNO-B1 99.99 20.00 99.99
238.7658 -54.0703 12.2 -1 USNO-B1 17.80 16.83 17.26
238.7719 -54.0721 2.1 -1 USNO-B1 17.52 16.16 16.76 *
238.7633 -54.0743 18.6 -1 USNO-B1 20.96 16.14 18.28
238.7631 -54.0746 19.6 -1 USNO-B1 19.80 17.43 18.48
238.7740 -54.0731 7.8 -1 USNO-B1 16.23 14.95 15.52
238.7755 -54.0759 17.5 -1 USNO-B1 18.25 17.13 17.63
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 29 in the list of sources is a candidate afterglow for 1072706_g901 with genie
ra=238.76117 (15:55:02.68) dec=-54.07482 (-54:04:29.4) +/- 0.6" mag=17.19+/-0.14
dist=72.9 REFID=50 major=1.0 minor=1.0 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 75.6 arc sec from the BAT position.
Found 7 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
238.7658 -54.0703 19.1 -1 USNO-B1 17.80 16.83 17.26
238.7554 -54.0739 12.6 -1 USNO-B1 17.09 14.26 15.51
238.7633 -54.0743 4.9 -1 USNO-B1 20.96 16.14 18.28
238.7631 -54.0746 4.2 -1 USNO-B1 19.80 17.43 18.48
238.7620 -54.0747 1.8 -1 USNO-B1 16.75 15.42 16.01 *
238.7631 -54.0752 4.3 -1 USNO-B1 19.29 18.12 18.64
238.7580 -54.0782 13.9 -1 USNO-B1 14.63 13.89 14.22
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 39 in the list of sources is a candidate afterglow for 1072706_g901 with genie
ra=238.75062 (15:55:00.15) dec=-54.03441 (-54:02:03.9) +/- 0.6" mag=18.09+/-0.15
dist=126.4 REFID=6 major=1.0 minor=0.9 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 87.9 arc sec from the BAT position.
This source is near the edge of image (0.867)
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
238.7567 -54.0364 14.8 -1 USNO-B1 19.02 17.33 18.08
238.7451 -54.0380 17.6 -1 USNO-B1 16.33 14.95 15.56
238.7498 -54.0365 7.8 -1 USNO-B1 14.74 13.79 14.21
238.7439 -54.0369 16.7 -1 USNO-B1 17.58 17.15 17.34
238.7598 -54.0339 19.6 -1 USNO-B1 18.92 16.79 17.74
238.7598 -54.0334 19.7 -1 USNO-B1 17.80 16.27 16.95
238.7554 -54.0307 16.7 -1 USNO-B1 18.01 16.89 17.39
238.7464 -54.0296 19.4 -1 USNO-B1 20.05 18.36 19.11
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 42 in the list of sources is a candidate afterglow for 1072706_g901 with genie
ra=238.75097 (15:55:00.23) dec=-54.07754 (-54:04:39.2) +/- 0.6" mag=16.68+/-0.14
dist=96.0 REFID=1 major=1.0 minor=1.0 flag=2 (blended)
*** The position of this source is inconsistent with the XRT position.
The position is 93.6 arc sec from the BAT position.
This source is near the edge of image (0.945)
Found 9 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
238.7491 -54.0722 19.6 -1 USNO-B1 19.85 18.23 18.95
238.7554 -54.0739 16.3 -1 USNO-B1 17.09 14.26 15.51
238.7580 -54.0782 15.0 -1 USNO-B1 14.63 13.89 14.22
238.7458 -54.0772 11.1 -1 USNO-B1 19.65 18.16 18.82
238.7440 -54.0771 14.7 -1 USNO-B1 16.91 15.64 16.20
238.7510 -54.0785 3.3 -1 USNO-B1 15.45 14.17 14.74 *
238.7518 -54.0791 5.8 -1 USNO-B1 17.15 16.04 16.53
238.7510 -54.0797 7.8 -1 USNO-B1 15.11 14.11 14.55
238.7542 -54.0816 16.3 -1 USNO-B1 99.99 18.17 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 48 in the list of sources is a candidate afterglow for 1072706_g901 with genie
ra=238.75027 (15:55:00.06) dec=-54.07940 (-54:04:45.8) +/- 0.6" mag=18.56+/-0.15
dist=101.2 REFID=53 major=0.6 minor=0.5 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 100.1 arc sec from the BAT position.
This source is near the edge of image (1.015)
Found 10 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
238.7580 -54.0782 16.9 -1 USNO-B1 14.63 13.89 14.22
238.7458 -54.0772 12.5 -1 USNO-B1 19.65 18.16 18.82
238.7440 -54.0771 15.5 -1 USNO-B1 16.91 15.64 16.20
238.7510 -54.0785 3.8 -1 USNO-B1 15.45 14.17 14.74 *
238.7518 -54.0791 3.4 -1 USNO-B1 17.15 16.04 16.53 *
238.7510 -54.0797 2.0 -1 USNO-B1 15.11 14.11 14.55 *
238.7542 -54.0816 11.6 -1 USNO-B1 99.99 18.17 99.99
238.7535 -54.0831 14.8 -1 USNO-B1 17.31 14.81 15.92
238.7564 -54.0836 19.9 -1 USNO-B1 18.75 16.70 17.61
238.7447 -54.0836 19.0 -1 USNO-B1 17.95 16.60 17.20
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 2 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
238.7890 -54.0616 2.8 -1 USNO-B1 18.27 17.10 17.62
238.7918 -54.0617 8.5 -1 USNO-B1 20.30 18.89 19.52
The closest star is 2.75" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=238.78892 (15:55:09.34) dec=-54.06150 (-54:03:41.4) +/- 0.6" mag=18.94+/-0.16 dist=2.8 REFID=38 flag=0
There are 86114.188 counts in the bkg source region of 5258.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 16.378 counts/pixel (5-sig UL in 4" is 19.83 mag) for 1072706_g901
There are 3463.7410 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 17.319 counts/pixel for 1072706_g901
XRT source is too far (60.1263027607142") from center -- do not compute local background.
There are 2 candidate(s) outside XRT error circle with mag < 19.83
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.39, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1072706_652962417_210910d10h39m32s679044usUT_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(238.7623,-54.0545,45")
fk5;-circle(238.766641760598,-54.0547024094455,6")
fk5;-circle(238.778810690424,-54.052734204661,6")
fk5;-circle(238.767537777243,-54.0498107215094,6")
fk5;-circle(238.761350027322,-54.0558552650916,6")
fk5;-circle(238.785969300461,-54.055907250482,6")
fk5;-circle(238.776547787592,-54.046924013005,6")
fk5;-circle(238.774347410909,-54.0635363645254,6")
fk5;-circle(238.77419056135,-54.0458116148964,6")
fk5;-circle(238.762425629663,-54.0451448867062,6")
fk5;-circle(238.752334539345,-54.0578193323661,6")
fk5;-circle(238.752443973804,-54.0449708091338,6")
fk5;-circle(238.743476535672,-54.0456604913448,6")
Region file: 1072706_652962417_210910d10h39m32s679044usUT_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(238.78779,-54.06192,8")
image paragraph message for exposure 3 of trigger 1072706
SRCLIST PROBLEM: srclist filled telemetry buffer
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
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 GRB210910 (Swift/BAT trigger 1072706) at 10:11:55 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 873 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 large, but uncertain, extinction expected.
------- notes for trigger 1072706 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210910d10h39m39s448034usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1072706
-expid=652962417 -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/1072706/
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 652962417.32744 or about 2021:253:10:26:52 UT
Found 2729 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 34% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 29 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 53 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 8 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.39 mag. Found 389 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 39% of the Genie image region. The
Genie image is INCOMPLETE with 2309 null pixels.
Genie image analysis:
Found 86114.2 counts in the large background region of 5258.0 pixels or a rate
of 16.378 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 19.66 mag. for a
4-arcsec aperture.
Found 3463.7 counts in the XRT position region of 200.0 pixels or a rate of
17.319 counts/pixel in a radius of 8.0 arcsec. The net count rate (using large
background region) at the XRT position is 1.254 +/- 0.399 (1-sigma) cps or
19.36 mag and a range from 19.06 to 19.77 mag. The 3-sigma UL at the XRT
position is 2.452 cps or 18.63 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.62 mag. The closest
srclist source has ra= 238.7858 dec= -54.0560 mag=18.48 sep=21.65".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 238.7889 dec= -54.0615 mag=18.94 sep=2.84". The closest Genie
source has ra= 238.7889 dec= -54.0615 mag=18.94 sep=2.84".
This paragraph is only useful if the XRT position is grossly wrong. There are 2
candidate(s) in the image data with mag < 19.83 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=238.77419
(15:55:05.81), DEC=-54.04581 (-54:02:44.9) (J2000). It has a mag of 16.83. It
is 33.2" 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 873 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 15:55:05.81 = 238.77419
DEC(J2000) = -54:02:44.9 = -54.04581
with a 90%-confidence error radius of about 0.61 arc sec. The estimated
magnitude is 16.83 with a 1-sigma error of about 0.14. 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 873 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 15:55:09.34 = 238.78892
DEC(J2000) = -54:03:41.4 = -54.06150
with a 90%-confidence error radius of about 0.64 arc sec. This position is 2.84
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.94 with a 1-sigma error of about 0.16. 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?
652962417 873 WHITE srclist found no candidates.
652962417 873 WHITE image found no candidates.
List afterglow candidates for other finding charts.
652961625 81 WHITE srclist found no candidates.
652961625 81 WHITE image found no candidates.
652961837 293 U srclist found no candidates.
652961837 293 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -54.06192
GRB_ERROR: 5
GRB_RA: 238.78779
IMAGE_START_TIME: 10:26:52
MAGNITUDE: 18.6
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT