image overlap message for exposure 1 of trigger 1058804
uvot_overlap.pl vrs. 2010-12-20b fem started at 210703d08h53m37s587607usUT
The observation of trigger 1058804 started 2021-07-02T19:09:24.9
Examining file ./1058804_g130_uvot_sky_image.fits
The exposure ID is 646945764
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (168.5711,-36.7467) with a roll angle of 302.2
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 (168.5700,-36.7410) with a radius of 3.000 arc min
This is 0.349 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 (168.5788,-36.7471) with a radius of 0.032 arc min
This is 0.372 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 1 of trigger 1058804
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210703d08h53m43s717293usUT
Observation start time is 2021-07-02T19:09:24.9
Examining file ./1058804_g130_uvot_catalog_image.fits
The exposure ID is 646945764
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 12 detected source(s) for 1058804_g130
Aspect correction adds -0.00084 degrees (-0.201 sec of time = -2.41 arc sec) to RA
Aspect correction adds 0.00067 degrees ( 2.42 arcsec) to Dec
Total aspect correction is 3.42 arcsec
Star catalogs centered at 168.5791 , -36.7507 with radius 2.37 arc min.
n_usno: 75 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.40866
RA DEC Mag Color
bright star 0: 168.58012 (11:14:19.23) -36.76796 (-36:46:04.6) 11.41 USNO-V
Mean distance difference (CAT_DELTA) for 7 matched entries is 0.519" for 1058804_g130
Mean and std. dev of mag. difference (MAG_DELTA) are 1.540 and 1.161 for 1058804_g130
Found 5 entries without IDs and 5 entries that are acceptable afterglow candidates for 1058804_g130.
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=168.5700 (11:14:16.80) DEC=-36.7410 (-36:44:27.6)
XRT distances are from RA=168.5788 (11:14:18.91) DEC=-36.7471 (-36:44:49.7)
*** WARNING 41 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1058804_g130 with genie
ra=168.58218 (11:14:19.72) dec=-36.74847 (-36:44:54.5) +/- 0.6" mag=15.34+/-0.14
dist=10.9 REFID=6 major=8.0 minor=2.5 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 44.3 arc sec from the BAT position.
Found 1 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
168.5803 -36.7530 17.3 -1 USNO-B1 19.28 17.60 18.35
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 8.0
-----------------
Entry 1 in the list of sources is a candidate afterglow for 1058804_g130 with genie
ra=168.57873 (11:14:18.90) dec=-36.74655 (-36:44:47.6) +/- 0.6" mag=13.70+/-0.14
dist=2.1 REFID=7 major=1.7 minor=1.3 flag=1 (neighbor)
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** unacceptable major profile of 1.7
-----------------
Entry 2 in the list of sources is a candidate afterglow for 1058804_g130 with genie
ra=168.58129 (11:14:19.51) dec=-36.74313 (-36:44:35.3) +/- 0.6" mag=14.29+/-0.14
dist=16.1 REFID=5 major=6.8 minor=0.8 flag=2 (blended)
*** The position of this source is inconsistent with the XRT position.
The position is 33.5 arc sec from the BAT position.
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 6.8
-----------------
Entry 3 in the list of sources is a candidate afterglow for 1058804_g130 with genie
ra=168.57561 (11:14:18.15) dec=-36.75160 (-36:45:05.8) +/- 0.6" mag=16.19+/-0.14
dist=18.5 REFID=4 major=3.5 minor=2.5 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 41.5 arc sec from the BAT position.
Found 2 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
168.5803 -36.7530 14.5 -1 USNO-B1 19.28 17.60 18.35
168.5711 -36.7476 19.4 -1 USNO-B1 18.85 17.00 17.82
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 3.5
-----------------
Entry 4 in the list of sources is a candidate afterglow for 1058804_g130 with genie
ra=168.57199 (11:14:17.28) dec=-36.74788 (-36:44:52.4) +/- 0.6" mag=14.90+/-0.14
dist=19.8 REFID=3 major=5.6 minor=2.5 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 25.4 arc sec from the BAT position.
Found 1 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
168.5711 -36.7476 2.8 -1 USNO-B1 18.85 17.00 17.82 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=168.57873 (11:14:18.90) dec=-36.74655 (-36:44:47.6) +/- 0.6" mag=13.70+/-0.14 dist=2.1 REFID=7 flag=1
There are 71504.242 counts in the bkg source region of 5743.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 12.451 counts/pixel (5-sig UL in 4" is 19.98 mag) for 1058804_g130
There are 15788.319 counts in the xrt source region of 199.00000 pixels.
Rate in xrt region with 8 arcsec radius is 79.338 counts/pixel for 1058804_g130
There are 22312.672 counts in the xrt_bkg source region of 955.00000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 23.364 counts/pixel (5-sig UL in 4" is 19.64 mag) for 1058804_g130
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 20.54, 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: 1058804_646945764_210703d08h53m43s717293usUT_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(168.5711,-36.7467,45")
fk5;-circle(168.582183254054,-36.7484731712123,6")
fk5;-circle(168.578732139656,-36.7465455353731,6")
fk5;-circle(168.581291284209,-36.7431271250516,6")
fk5;-circle(168.575610770281,-36.7516024324781,6")
fk5;-circle(168.571993840006,-36.7478768593317,6")
fk5;-circle(168.576298644097,-36.7601708954572,6")
Region file: 1058804_646945764_210703d08h53m43s717293usUT_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(168.57879,-36.74714,8")
Region file: 1058804_646945764_210703d08h53m43s717293usUT_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(168.57879,-36.74714,25")
fk5;-circle(168.57879,-36.74714,15")
fk5;-circle(168.582183254054,-36.7484731712123,6")
fk5;-circle(168.581291284209,-36.7431271250516,6")
fk5;-circle(168.575610770281,-36.7516024324781,6")
fk5;-circle(168.571993840006,-36.7478768593317,6")
image paragraph message for exposure 1 of trigger 1058804
SRCLIST PROBLEM: multiple afterglow candidates
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 GRB210702 (Swift/BAT trigger 1058804) at 19:07:13 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 103 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.
Processing for the 8'x8' region for the list of sources generated on-board
FAILED because of multiple afterglow candidates. No correction has been made
for the expected extinction corresponding to E(B-V) of 0.121.
------- notes for trigger 1058804 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210703d08h53m48s995691usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1058804
-expid=646945764 -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/1058804/
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 646945764.87046 or about 2021:183:19:09:19 UT
Found 387 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 8% of the srclist region. Found 151 sources in
srclist catalog. Found 74 srclist source(s) without IDs. There are 2 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag. More than 1 candidate indicates that the srclist candidates are
UNRELIABLE.
Found 12 source(s) in Genie image catalog. 1 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
20.54 mag. Found 71 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 8% of the Genie image region.
Genie image analysis:
Found 71504.2 counts in the large background region of 5743.0 pixels or a rate
of 12.451 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 19.80 mag. for a
4-arcsec aperture.
Found 15788.3 counts in the XRT position region of 199.0 pixels or a rate of
79.338 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 74.259 +/- 0.863 (1-sigma) cps or
14.93 mag and a range from 14.91 to 14.94 mag. The 3-sigma UL at the XRT
position is 76.848 cps or 14.89 mag.
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 168.5787 dec= -36.7465 mag=13.70 sep=2.15". The closest Genie
source has ra= 168.5787 dec= -36.7465 mag=13.70 sep=2.15".
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=168.57903
(11:14:18.97), DEC=-36.74571 (-36:44:44.6) (J2000). It has a mag of 17.16. It
is 31.1" 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 103 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 11:14:18.97 = 168.57903
DEC(J2000) = -36:44:44.6 = -36.74571
with a 90%-confidence error radius of about 1.10 arc sec. The estimated
magnitude is 17.16 with a 1-sigma error of about 0.35. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.121.
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 103 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 11:14:18.90 = 168.57873
DEC(J2000) = -36:44:47.6 = -36.74655
with a 90%-confidence error radius of about 0.61 arc sec. This position is 2.15
arc sec. from the center of the XRT error circle. The estimated magnitude is
13.70 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.121.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 103 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 11:14:19.08 = 168.57952
DEC(J2000) = -36:44:48.9 = -36.74691
with a 90%-confidence error radius of about 1.10 arc sec. This position is 2.26
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.50 with a 1-sigma error of about 0.35. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.121.
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?
646945764 103 WHITE 168.57793 -36.74729 15.66/19.2 2.6 srclist Yes
646945764 103 WHITE 168.57937 -36.74655 15.94/19.2 2.7 srclist Yes
646945764 103 WHITE image found no candidates.
List afterglow candidates for other finding charts.
646945976 315 ? srclist data are not available.
646945976 315 U 168.57846 -36.74690 11.72/19.4 8.4 image Yes
No unique and reliable afterglow was found.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -36.74714
GRB_ERROR: 5
GRB_RA: 168.57879
IMAGE_START_TIME: 19:09:19
MAGNITUDE: 14.9
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT