image overlap message for exposure 2 of trigger 1250282
uvot_overlap.pl vrs. 2010-12-20b fem started at 240824d01h20m51s829068usUT
The observation of trigger 1250282 started 2024-08-24T01:08:56.9
Examining file 1250282_g330_uvot_sky_image.fits
The exposure ID is 746154536
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (213.1913,63.7347) with a roll angle of 247.1
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 (213.2030,63.7370) with a radius of 3.000 arc min
This is 0.342 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
Could not find the location of an XRT error circle
image afterglow message for exposure 2 of trigger 1250282
find_uvot_ag.pl vrs. 2023-04-25a fem started at 240824d01h20m52s601115usUT
Observation start time is 2024-08-24T01:08:56.9
Examining file 1250282_g330_uvot_catalog_image.fits
The exposure ID is 746154536
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 1 detected source(s) for 1250282_g330
Aspect correction adds -0.00128 degrees (-0.307 sec of time = -2.04 arc sec) to RA
Aspect correction adds 0.00078 degrees ( 2.79 arcsec) to Dec
Total aspect correction is 3.46 arcsec
Star catalogs centered at 213.1484 , 63.7185 with radius 2.00 arc min.
n_usno: 50 n_gsc: 32
Bright star catalog has no entries brighter than 12 mag
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 1 matched entries is 0.206" for 1250282_g330
Mean and std. dev of mag. difference (MAG_DELTA) are 0.895 and 0.000 for 1250282_g330
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1250282_g330.
Acceptable entries have no ID, BAT distance < 200" or XRT distance < 10", 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=213.2030 (14:12:48.72) DEC=63.7370 (+63:44:13.2)
XRT distances are as reported in catalog file.
There are 52305.652 counts in the bkg source region of 6310.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 8.289 counts/pixel (5-sig UL in 4" is 19.32 mag) for 1250282_g330
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.31, BAT distances < 200",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1250282_746154536_240824d01h20m52s601115usUT_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(213.1913,63.7347,45")
image paragraph message for exposure 2 of trigger 1250282
IMAGE PROBLEM: partial overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB240824 (Swift/BAT trigger 1250282) at 01:03:25 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
297 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 25% of the
BAT error circle. The typical 3-sigma upper limit has been about 19.2 mag. The
8'x8' region for the list of sources generated on-board covers 100% of the BAT
error circle. The list of sources is typically complete to about 18.0 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.014.
------- notes for trigger 1250282 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 240824d01h20m53s595683usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1250282
-expid=746154536 -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/1250282/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
No XRT position found for srclist. No XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 746154536.89878 or about 2024:237:01:08:51 UT
Found 482 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 29 sources in
srclist catalog. Found 2 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
17.56 mag.
Found 1 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 19.31 mag. Found 46 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 7% of the
Genie image region.
Genie image analysis:
Found 52305.7 counts in the large background region of 6310.0 pixels or a rate
of 8.289 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 19.12 mag. for a
4-arcsec aperture.
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?
746154536 296 U srclist found no candidates.
746154536 296 U image found no candidates.
List afterglow candidates for other finding charts.
746154378 138 WHITE 213.28304 63.71421 19.28/18.7 151.7 srclist Yes
746154378 138 WHITE 213.24625 63.78053 19.32/18.7 171.1 srclist Yes
746154378 138 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: 63.73700
GRB_ERROR: 200
GRB_RA: 213.20300
IMAGE_START_TIME: 01:08:51
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: BAT