image overlap message for exposure 1 of trigger 1182085
uvot_overlap.pl vrs. 2010-12-20b fem started at 230802d20h23m04s360753usUT
The observation of trigger 1182085 started 2023-08-02T06:52:11.4
Examining file ./1182085_g104_uvot_sky_image.fits
The exposure ID is 712651931
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (76.2437,19.5637) with a roll angle of 82.1
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 (76.2210,19.5700) with a radius of 3.000 arc min
This is 1.338 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 (76.2398,19.5607) with a radius of 0.033 arc min
This is 0.284 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 1182085
find_uvot_ag.pl vrs. 2023-04-25a fem started at 230802d20h23m06s784146usUT
Observation start time is 2023-08-02T06:52:11.4
Examining file ./1182085_g104_uvot_catalog_image.fits
The exposure ID is 712651931
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 9 detected source(s) for 1182085_g104
Aspect correction adds 0.00143 degrees (0.343 sec of time = 4.84 arc sec) to RA
Aspect correction adds -0.00048 degrees (-1.73 arcsec) to Dec
Total aspect correction is 5.14 arcsec
Star catalogs centered at 76.2444 , 19.5614 with radius 2.77 arc min.
n_usno: 140 n_gsc: 128
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 9 matched entries is 0.456" for 1182085_g104
Mean and std. dev of mag. difference (MAG_DELTA) are 0.903 and 0.416 for 1182085_g104
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1182085_g104.
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.
Magnitude criteria will be applied later.
BAT distances are from RA=76.2210 (05:04:53.04) DEC=19.5700 (+19:34:12.0)
XRT distances are from RA=76.2398 (05:04:57.56) DEC=19.5607 (+19:33:38.4)
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
76.2389 19.5581 9.6 -1 USNO-B1 19.65 17.87 18.66
76.2390 19.5581 9.7 -1 GSC2.3 17.88 19.49 18.47
The closest star is 9.62" away.
List UVOT sources within 10" of the XRT position:
There are 1.7955355E+05 counts in the bkg source region of 5895.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 30.459 counts/pixel (5-sig UL in 4" is 19.49 mag) for 1182085_g104
There are 6001.4604 counts in the xrt source region of 199.00000 pixels.
Rate in xrt region with 8 arcsec radius is 30.158 counts/pixel for 1182085_g104
There are 36295.625 counts in the xrt_bkg source region of 1197.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 30.322 counts/pixel (5-sig UL in 4" is 19.50 mag) for 1182085_g104
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 20.05, 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: 1182085_712651931_230802d20h23m06s784146usUT_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(76.2437,19.5637,45")
fk5;-circle(76.2323142766044,19.5647723935205,6")
fk5;-circle(76.2469838200148,19.5635613826136,6")
fk5;-circle(76.2498854800658,19.5558062082883,6")
fk5;-circle(76.2331338280366,19.5715808408807,6")
fk5;-circle(76.2493070630792,19.55169429813,6")
Region file: 1182085_712651931_230802d20h23m06s784146usUT_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(76.23983,19.56067,8")
Region file: 1182085_712651931_230802d20h23m06s784146usUT_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(76.23983,19.56067,25")
fk5;-circle(76.23983,19.56067,15")
fk5;-circle(76.2323142766044,19.5647723935205,6")
fk5;-circle(76.2469838200148,19.5635613826136,6")
image paragraph message for exposure 1 of trigger 1182085
------ Start for Possible Stand-alone Circular ----
In response to GRB230802 (Swift/BAT trigger 1182085) at 06:50:26 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 73 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
0.614.
------- notes for trigger 1182085 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 230802d20h23m11s103115usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1182085
-expid=712651931 -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/1182085/
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 712651931.3599 or about 2023:214:06:52:06 UT
Found 647 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 11% of the srclist region. Found 48 sources in
srclist catalog. Found 1 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 9 source(s) in Genie image catalog. Found 0 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.05 mag. Found 136 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 12% of the
Genie image region.
Genie image analysis:
Found 179553.5 counts in the large background region of 5895.0 pixels or a rate
of 30.459 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 19.32 mag. for a
4-arcsec aperture.
Found 6001.5 counts in the XRT position region of 199.0 pixels or a rate of
30.158 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.217 +/- 0.558 (1-sigma) cps. The
3-sigma UL at the XRT position is 1.674 cps or 19.05 mag. The closest srclist
source has ra= 76.2322 dec= 19.5648 mag=18.25 sep=29.82". The closest Genie
source has ra= 76.2470 dec= 19.5636 mag=20.51 sep=26.41".
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?
712651931 73 WHITE srclist found no candidates.
712651931 73 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 19.56067
GRB_ERROR: 5
GRB_RA: 76.23983
IMAGE_START_TIME: 06:52:06
MAGNITUDE: 19.1
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT