image overlap message for exposure 1 of trigger 1205319
uvot_overlap.pl vrs. 2010-12-20b fem started at 231230d12h20m28s672956usUT
The observation of trigger 1205319 started 2023-12-30T01:32:06.7
Examining file ./1205319_g177_uvot_sky_image.fits
The exposure ID is 725592726
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (245.2080,58.1171) with a roll angle of 149.3
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 (245.1970,58.1200) with a radius of 3.000 arc min
This is 0.390 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 (245.2144,58.1239) with a radius of 0.035 arc min
This is 0.460 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 1205319
find_uvot_ag.pl vrs. 2023-04-25a fem started at 231230d12h20m32s367171usUT
Observation start time is 2023-12-30T01:32:06.7
Examining file ./1205319_g177_uvot_catalog_image.fits
The exposure ID is 725592726
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 4 detected source(s) for 1205319_g177
Aspect correction adds 0.00023 degrees (0.054 sec of time = 0.43 arc sec) to RA
Aspect correction adds -0.00005 degrees (-0.18 arcsec) to Dec
Total aspect correction is 0.47 arcsec
Star catalogs centered at 245.2044 , 58.1195 with radius 2.44 arc min.
n_usno: 61 n_gsc: 61
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 3 matched entries is 1.099" for 1205319_g177
Mean and std. dev of mag. difference (MAG_DELTA) are 2.120 and 0.832 for 1205319_g177
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1205319_g177.
Acceptable entries have no ID, XRT distances < 5.25", 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=245.1970 (16:20:47.28) DEC=58.1200 (+58:07:12.0)
XRT distances are from RA=245.2144 (16:20:51.45) DEC=58.1239 (+58:07:26.2)
-----------------
Entry 2 in the list of sources is a candidate afterglow for 1205319_g177 with genie
ra=245.18031 (16:20:43.27) dec=58.10068 (+58:06:02.5) +/- 1.1" mag=20.49+/-0.30
dist=105.9 REFID=2 major=2.2 minor=1.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 77.2 arc sec from the BAT position.
Found 3 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
245.1807 58.0998 3.2 -1 USNO-B1 16.87 16.21 16.50 *
245.1824 58.0992 6.6 -1 USNO-B1 20.83 99.99 99.99
245.1807 58.0997 3.5 -1 GSC2.3 16.20 16.93 17.61 *
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:
There are 1.5510658E+05 counts in the bkg source region of 6210.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 24.977 counts/pixel (5-sig UL in 4" is 19.60 mag) for 1205319_g177
There are 4974.6460 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 24.749 counts/pixel for 1205319_g177
There are 31063.643 counts in the xrt_bkg source region of 1247.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 24.911 counts/pixel (5-sig UL in 4" is 19.60 mag) for 1205319_g177
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 20.16, XRT distances < 5.25",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1205319_725592726_231230d12h20m32s367171usUT_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(245.2080,58.1171,45")
fk5;-circle(245.204767391755,58.10603674887,6")
Region file: 1205319_725592726_231230d12h20m32s367171usUT_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(245.21437,58.12394,8")
Region file: 1205319_725592726_231230d12h20m32s367171usUT_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(245.21437,58.12394,25")
fk5;-circle(245.21437,58.12394,15")
image paragraph message for exposure 1 of trigger 1205319
------ Start for Possible Stand-alone Circular ----
In response to GRB231230 (Swift/BAT trigger 1205319) at 01:29:08 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 145 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
0.015.
------- notes for trigger 1205319 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 231230d12h20m36s831354usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1205319
-expid=725592726 -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/1205319/
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 725592726.72016 or about 2023:364:01:32:01 UT
Found 314 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 36 sources in
srclist catalog. Found 25 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 4 source(s) in Genie image catalog. Found 1 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.16 mag. Found 60 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 6% of the
Genie image region.
Genie image analysis:
Found 155106.6 counts in the large background region of 6210.0 pixels or a rate
of 24.977 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 19.43 mag. for a
4-arcsec aperture.
Found 4974.6 counts in the XRT position region of 201.0 pixels or a rate of
24.749 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.216 +/- 0.507 (1-sigma) cps. The
3-sigma UL at the XRT position is 1.521 cps or 19.15 mag. The closest srclist
source has ra= 245.2329 dec= 58.1380 mag=19.14 sep=61.59". The closest Genie
source has ra= 245.2325 dec= 58.1382 mag=19.05 sep=61.96".
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=245.27660
(16:21:06.38), DEC=58.14680 (+58:08:48.5) (J2000). It has a mag of 18.63. It is
177.8" 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 145 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 16:21:06.38 = 245.27660
DEC(J2000) = +58:08:48.5 = 58.14680
with a 90%-confidence error radius of about 1.10 arc sec. The estimated
magnitude is 18.63 with a 1-sigma error of about 0.35. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.015.
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?
725592726 144 WHITE srclist found no candidates.
725592726 144 WHITE image found no candidates.
List afterglow candidates for other finding charts.
725592885 303 ? srclist data are not available.
725592885 303 U image found no candidates.
725593442 860 WHITE srclist found no candidates.
725593442 860 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 58.12394
GRB_ERROR: 5.25
GRB_RA: 245.21437
IMAGE_START_TIME: 01:32:01
MAGNITUDE: 19.1
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT