image overlap message for exposure 1 of trigger 1201696
uvot_overlap.pl vrs. 2010-12-20b fem started at 231211d07h21m00s509491usUT
The observation of trigger 1201696 started 2023-12-10T21:37:19.5
Examining file ./1201696_g494_uvot_sky_image.fits
The exposure ID is 723937039
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (95.7743,-48.3663) with a roll angle of 162.5
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 (95.7720,-48.3590) with a radius of 3.000 arc min
This is 0.445 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 (95.7947,-48.3723) with a radius of 0.037 arc min
This is 0.889 arc min from the center of the uvot region
The area of the XRT error circle is 0.004 sq. arc min
The UVOT/XRT overlap is 0.004 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1201696
find_uvot_ag.pl vrs. 2023-04-25a fem started at 231211d07h21m02s892542usUT
Observation start time is 2023-12-10T21:37:19.5
Examining file ./1201696_g494_uvot_catalog_image.fits
The exposure ID is 723937039
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 15 detected source(s) for 1201696_g494
Aspect correction adds -0.00095 degrees (-0.227 sec of time = -2.26 arc sec) to RA
Aspect correction adds -0.00201 degrees (-7.23 arcsec) to Dec
Total aspect correction is 7.58 arcsec
Star catalogs centered at 95.7828 , -48.3673 with radius 2.63 arc min.
n_usno: 81 n_gsc: 94
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 12 matched entries is 0.547" for 1201696_g494
Mean and std. dev of mag. difference (MAG_DELTA) are 0.651 and 0.538 for 1201696_g494
Found 3 entries without IDs and 3 entries that are acceptable afterglow candidates for 1201696_g494.
Acceptable entries have no ID, XRT distances < 5.5", 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=95.7720 (06:23:05.28) DEC=-48.3590 (-48:21:32.4)
XRT distances are from RA=95.7947 (06:23:10.73) DEC=-48.3723 (-48:22:20.2)
-----------------
Entry 1 in the list of sources is a candidate afterglow for 1201696_g494 with genie
ra=95.79566 (06:23:10.96) dec=-48.37215 (-48:22:19.7) +/- 0.6" mag=19.03+/-0.15
dist=2.3 REFID=13 major=2.3 minor=0.8 flag=0
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
95.7906 -48.3694 15.5 -1 USNO-B1 21.85 20.97 21.36
95.7979 -48.3683 15.0 -1 USNO-B1 16.38 15.09 15.67
95.7918 -48.3764 18.0 -1 USNO-B1 19.27 18.16 18.65
95.7907 -48.3694 15.4 -1 GSC2.3 20.11 99.99 99.99
95.7980 -48.3683 15.0 -1 GSC2.3 15.52 16.33 99.99
95.7917 -48.3763 17.8 -1 GSC2.3 18.28 19.67 99.99
*** unacceptable major profile of 2.3
-----------------
Entry 8 in the list of sources is a candidate afterglow for 1201696_g494 with genie
ra=95.79839 (06:23:11.61) dec=-48.34800 (-48:20:52.8) +/- 0.7" mag=19.70+/-0.16
dist=87.9 REFID=4 major=1.2 minor=0.3 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 74.5 arc sec from the BAT position.
This source is near the edge of image (0.948)
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
95.7993 -48.3474 3.0 -1 USNO-B1 18.14 16.07 16.99 *
95.8055 -48.3494 17.9 -1 USNO-B1 16.92 15.93 16.37
95.7984 -48.3429 18.4 -1 USNO-B1 18.93 17.63 18.21
95.7990 -48.3474 2.6 -1 GSC2.3 16.48 18.06 99.99 *
95.8055 -48.3494 17.8 -1 GSC2.3 16.34 16.82 99.99
95.8014 -48.3461 10.0 -1 GSC2.3 99.99 21.97 99.99
95.7984 -48.3428 18.6 -1 GSC2.3 17.90 18.82 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 11 in the list of sources is a candidate afterglow for 1201696_g494 with genie
ra=95.76209 (06:23:02.90) dec=-48.34680 (-48:20:48.5) +/- 0.7" mag=20.17+/-0.18
dist=120.4 REFID=2 major=1.1 minor=1.0 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 49.9 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
95.7609 -48.3470 3.0 -1 USNO-B1 19.34 17.57 18.36 *
95.7609 -48.3470 2.9 -1 GSC2.3 17.88 19.24 99.99 *
95.7634 -48.3445 9.1 -1 GSC2.3 99.99 21.80 99.99
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=95.79566 (06:23:10.96) dec=-48.37215 (-48:22:19.7) +/- 0.6" mag=19.03+/-0.15 dist=2.3 REFID=13 flag=0
There are 36444.977 counts in the bkg source region of 5922.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 6.154 counts/pixel (5-sig UL in 4" is 20.36 mag) for 1201696_g494
There are 1486.6613 counts in the xrt source region of 197.00000 pixels.
Rate in xrt region with 8 arcsec radius is 7.547 counts/pixel for 1201696_g494
XRT source is too far (53.3512348960839") from center -- do not compute local background.
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 20.92, XRT distances < 5.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1201696_723937039_231211d07h21m02s892542usUT_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(95.7743,-48.3663,45")
fk5;-circle(95.7853082687391,-48.365949362356,6")
fk5;-circle(95.7836477910635,-48.373652403206,6")
fk5;-circle(95.7882531689518,-48.3610160706835,6")
fk5;-circle(95.7639250488876,-48.3560436136104,6")
Region file: 1201696_723937039_231211d07h21m02s892542usUT_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(95.79471,-48.37228,8")
image paragraph message for exposure 1 of trigger 1201696
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 GRB231210 (Swift/BAT trigger 1201696) at 21:29:04 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 462 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
0.058.
------- notes for trigger 1201696 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 231211d07h21m15s274826usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1201696
-expid=723937039 -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/1201696/
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 723937039.50872 or about 2023:344:21:37:14 UT
Found 467 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 8% of the srclist region. Found 134 sources in
srclist catalog. Found 82 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 15 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 3 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.92 mag. Found 92 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 9% of the Genie image region.
Genie image analysis:
Found 36445.0 counts in the large background region of 5922.0 pixels or a rate
of 6.154 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 20.19 mag. for a
4-arcsec aperture.
Found 1486.7 counts in the XRT position region of 197.0 pixels or a rate of
7.547 counts/pixel in a radius of 8.0 arcsec. The net count rate (using large
background region) at the XRT position is 1.829 +/- 0.261 (1-sigma) cps or
18.95 mag and a range from 18.80 to 19.12 mag. The 3-sigma UL at the XRT
position is 2.610 cps or 18.56 mag. The closest srclist source has ra= 95.7951
dec= -48.3684 mag=19.02 sep=14.15".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 95.7957 dec= -48.3721 mag=19.03 sep=2.33". The closest Genie
source has ra= 95.7957 dec= -48.3721 mag=19.03 sep=2.33".
This paragraph is only useful if the XRT position is grossly wrong. There are 3
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=95.78105
(06:23:07.45), DEC=-48.37429 (-48:22:27.4) (J2000). It has a mag of 18.02. It
is 59.2" 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 462 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 06:23:07.45 = 95.78105
DEC(J2000) = -48:22:27.4 = -48.37429
with a 90%-confidence error radius of about 1.10 arc sec. The estimated
magnitude is 18.02 with a 1-sigma error of about 0.35. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.058.
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 462 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 06:23:10.96 = 95.79566
DEC(J2000) = -48:22:19.7 = -48.37215
with a 90%-confidence error radius of about 0.63 arc sec. This position is 2.33
arc sec. from the center of the XRT error circle. The estimated magnitude is
19.03 with a 1-sigma error of about 0.15. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.058.
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?
723937039 461 WHITE srclist found no candidates.
723937039 461 WHITE image found no candidates.
List afterglow candidates for other finding charts.
723937445 867 WHITE srclist found no candidates.
723937445 867 ? image data are not available.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -48.37228
GRB_ERROR: 5.5
GRB_RA: 95.79471
IMAGE_START_TIME: 21:37:14
MAGNITUDE: 18.6
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT