image overlap message for exposure 1 of trigger 1248132
uvot_overlap.pl vrs. 2010-12-20b fem started at 250910d14h11m05s204993usUT
The observation of trigger 1248132 started 2024-08-11T14:09:49.6
Examining file 1248132_g135_uvot_sky_image.fits
The exposure ID is 745078189
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (226.3571,28.8952) with a roll angle of 280.8
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 (226.3283,28.8840) with a radius of 1.800 arc min
This is 1.652 arc min from the center of the uvot region
The area of the BAT error circle is 10.18 sq. arc min
The UVOT/BAT overlap is 3.28 sq. arc min or 0.32 of the BAT error circle
The XRT error circle is centered at (226.3623,28.8961) with a radius of 0.040 arc min
This is 0.282 arc min from the center of the uvot region
The area of the XRT error circle is 0.005 sq. arc min
The UVOT/XRT overlap is 0.005 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1248132
find_uvot_ag.pl vrs. 2023-04-25a fem started at 250910d14h11m07s952093usUT
Observation start time is 2024-08-11T14:09:49.6
Examining file 1248132_g135_uvot_catalog_image.fits
The exposure ID is 745078189
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 3 detected source(s) for 1248132_g135
Aspect correction adds -0.00101 degrees (-0.243 sec of time = -3.19 arc sec) to RA
Aspect correction adds -0.00014 degrees (-0.49 arcsec) to Dec
Total aspect correction is 3.23 arcsec
Star catalogs centered at 226.3599 , 28.8926 with radius 2.30 arc min.
n_usno: 51 n_gsc: 43
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 4 matched entries is 0.722" for 1248132_g135
Mean and std. dev of mag. difference (MAG_DELTA) are 0.806 and 0.639 for 1248132_g135
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1248132_g135.
Acceptable entries have no ID, XRT distances < 6", 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=226.3283 (15:05:18.80) DEC=28.8840 (+28:53:02.5)
XRT distances are from RA=226.3623 (15:05:26.96) DEC=28.8961 (+28:53:46.1)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 51633.156 counts in the bkg source region of 6261.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 8.247 counts/pixel (5-sig UL in 4" is 20.20 mag) for 1248132_g135
There are 1617.9027 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 8.090 counts/pixel for 1248132_g135
There are 10360.563 counts in the xrt_bkg source region of 1247.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 8.308 counts/pixel (5-sig UL in 4" is 20.20 mag) for 1248132_g135
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 20.76, XRT distances < 6",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1248132_745078189_250910d14h11m07s952093usUT_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(226.3571,28.8952,45")
fk5;-circle(226.363869466589,28.9063865624161,6")
Region file: 1248132_745078189_250910d14h11m07s952093usUT_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(226.36233,28.89614,8")
Region file: 1248132_745078189_250910d14h11m07s952093usUT_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(226.36233,28.89614,25")
fk5;-circle(226.36233,28.89614,15")
image paragraph message for exposure 1 of trigger 1248132
------ Start for Possible Stand-alone Circular ----
In response to GRB240811 (Swift/BAT trigger 1248132) at 14:07:33 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 102 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
0.023.
------- notes for trigger 1248132 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 250910d14h11m09s657167usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1248132
-expid=745078189 -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/1248132/
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 745078189.57346 or about 2024:224:14:09:44 UT
Found 263 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 32 sources in
srclist catalog. Found 16 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 3 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 20.76 mag. Found 47 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 51633.2 counts in the large background region of 6261.0 pixels or a rate
of 8.247 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 20.03 mag. for a
4-arcsec aperture.
Found 1617.9 counts in the XRT position region of 200.0 pixels or a rate of
8.090 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.292 +/- 0.289 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.868 cps or 19.76 mag. The closest srclist
source has ra= 226.3642 dec= 28.9065 mag=19.26 sep=37.72". The closest Genie
source has ra= 226.3639 dec= 28.9064 mag=18.81 sep=37.21".
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?
745078189 101 WHITE srclist found no candidates.
745078189 101 WHITE image found no candidates.
List afterglow candidates for other finding charts.
745078401 313 U srclist found no candidates.
745078401 313 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 28.89614
GRB_ERROR: 6
GRB_RA: 226.36233
IMAGE_START_TIME: 14:09:44
MAGNITUDE: 19.8
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT