image overlap message for exposure 1 of trigger 1102329
uvot_overlap.pl vrs. 2010-12-20b fem started at 220412d17h15m47s978989usUT
The observation of trigger 1102329 started 2022-04-12T17:08:47.0
Examining file 1102329_g117_uvot_sky_image.fits
The exposure ID is 671476126
The exposure time is 130.294 (seconds)
The filter is WHITE.
*** Warning -- found 1368 null pixels in the image.
The uvot region is centered at (320.7998,-0.2222) with a roll angle of 79.7
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 (320.7940,-0.2230) with a radius of 3.000 arc min
This is 0.349 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 1 of trigger 1102329
find_uvot_ag.pl vrs. 2020-10-30 fem started at 220412d17h15m49s670254usUT
Observation start time is 2022-04-12T17:08:47.0
Examining file 1102329_g117_uvot_catalog_image.fits
The exposure ID is 671476126
The exposure is 130.294 sec.
The bin size is 2 pixels
The filter is WHITE
There are 5 detected source(s) for 1102329_g117
Aspect correction adds 0.00095 degrees (0.228 sec of time = 3.42 arc sec) to RA
Aspect correction adds 0.00087 degrees ( 3.14 arcsec) to Dec
Total aspect correction is 4.64 arcsec
Star catalogs centered at 320.8000 , -0.2213 with radius 2.65 arc min.
n_usno: 62 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 5 matched entries is 0.525" for 1102329_g117
Mean and std. dev of mag. difference (MAG_DELTA) are 1.549 and 0.632 for 1102329_g117
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1102329_g117.
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=320.7940 (21:23:10.56) DEC=-0.2230 (-00:13:22.8)
XRT distances are as reported in catalog file.
There are 1.2849492E+05 counts in the bkg source region of 6198.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 20.732 counts/pixel (5-sig UL in 4" is 19.55 mag) for 1102329_g117
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.55, 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: 1102329_671476126_220412d17h15m49s670254usUT_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(320.7998,-0.2222,45")
fk5;-circle(320.794969091134,-0.228538585604587,6")
image paragraph message for exposure 1 of trigger 1102329
IMAGE PROBLEM: partial overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB220412 (Swift/BAT trigger 1102329) at 17:06:48 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 130 seconds with the White filter
starting 89 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 19.6 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 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.060.
------- notes for trigger 1102329 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 220412d17h15m51s594888usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1102329
-expid=671476126 -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/1102329/
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 671476126.95514 or about 2022:102:17:08:41 UT
Found 450 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 40 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
18.66 mag.
Found 5 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 19.55 mag. Found 58 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 5% of the
Genie image region. The Genie image is INCOMPLETE with 1368 null pixels.
Genie image analysis:
Found 128494.9 counts in the large background region of 6198.0 pixels or a rate
of 20.732 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 19.37 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?
671476126 88 WHITE srclist found no candidates.
671476126 88 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -0.22300
GRB_ERROR: 200
GRB_RA: 320.79400
IMAGE_START_TIME: 17:08:41
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: BAT