image overlap message for exposure 2 of trigger 1104692
uvot_overlap.pl vrs. 2010-12-20b fem started at 220430d18h40m01s969268usUT
The observation of trigger 1104692 started 2022-04-30T13:58:17.5
Examining file ./1104692_g301_uvot_sky_image.fits
The exposure ID is 673019897
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (97.6082,9.5460) with a roll angle of 281.7
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 (97.6110,9.5100) with a radius of 3.000 arc min
This is 2.166 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 5.85 sq. arc min or 0.21 of the BAT error circle
The XRT error circle is centered at (97.6122,9.5475) with a radius of 0.033 arc min
This is 0.254 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 2 of trigger 1104692
find_uvot_ag.pl vrs. 2020-10-30 fem started at 220430d18h40m19s539222usUT
Observation start time is 2022-04-30T13:58:17.5
Examining file ./1104692_g301_uvot_catalog_image.fits
The exposure ID is 673019897
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 21 detected source(s) for 1104692_g301
Aspect correction adds -0.00114 degrees (-0.273 sec of time = -4.04 arc sec) to RA
Aspect correction adds -0.00078 degrees (-2.82 arcsec) to Dec
Total aspect correction is 4.92 arcsec
Star catalogs centered at 97.6124 , 9.5482 with radius 2.61 arc min.
n_usno: 227 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.95464
RA DEC Mag Color
bright star 0: 97.61172 (06:30:26.81) 9.57456 (+09:34:28.4) 11.95 USNO-V
Mean distance difference (CAT_DELTA) for 21 matched entries is 0.487" for 1104692_g301
Mean and std. dev of mag. difference (MAG_DELTA) are 1.743 and 0.770 for 1104692_g301
Found 1 entries without IDs and 0 entries that are acceptable afterglow candidates for 1104692_g301.
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.
1 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=97.6110 (06:30:26.64) DEC= 9.5100 (+09:30:36.0)
XRT distances are from RA=97.6122 (06:30:26.92) DEC= 9.5475 (+09:32:51.1)
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 20:
ra= 97.60835 dec= 9.57293 +/- 0.6" mag=15.46+/-0.14 dist=92.4 REFID=2 flag=18
Found 3 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
97.6137 9.5484 6.4 -1 USNO-B1 20.77 19.38 19.99
97.6102 9.5486 7.9 -1 USNO-B1 19.57 19.85 19.73
97.6139 9.5465 7.1 -1 USNO-B1 20.71 19.07 19.80
The closest star is 6.38" away.
List UVOT sources within 10" of the XRT position:
There are 32753.764 counts in the bkg source region of 5841.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 5.608 counts/pixel (5-sig UL in 4" is 19.53 mag) for 1104692_g301
There are 1122.0824 counts in the xrt source region of 196.00000 pixels.
Rate in xrt region with 8 arcsec radius is 5.725 counts/pixel for 1104692_g301
There are 6414.2168 counts in the xrt_bkg source region of 1152.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 5.568 counts/pixel (5-sig UL in 4" is 19.53 mag) for 1104692_g301
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 20.08, 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: 1104692_673019897_220430d18h40m19s539222usUT_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(97.6082,9.5460,45")
fk5;-circle(97.614908313435,9.55172155553116,6")
fk5;-circle(97.6021542366426,9.55021099884707,6")
fk5;-circle(97.6129613958367,9.53545208485895,6")
fk5;-circle(97.5981196312971,9.54857464054695,6")
fk5;-circle(97.5966566370599,9.54776432557373,6")
Region file: 1104692_673019897_220430d18h40m19s539222usUT_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(97.61217,9.54753,8")
Region file: 1104692_673019897_220430d18h40m19s539222usUT_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(97.61217,9.54753,25")
fk5;-circle(97.61217,9.54753,15")
fk5;-circle(97.614908313435,9.55172155553116,6")
image paragraph message for exposure 2 of trigger 1104692
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB220430 (Swift/BAT trigger 1104692) at 13:53:15 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
272 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 19.2 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 18.0 mag. No
correction has been made for the large, but uncertain, extinction expected.
------- notes for trigger 1104692 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 220430d18h40m24s869350usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1104692
-expid=673019897 -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/1104692/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for xrt position. XRT position found for srclist.
XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 673019897.4528 or about 2022:120:13:58:12 UT
Found 1141 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 23% of the srclist region. Found 93 sources in
srclist catalog. Found 18 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.12 mag.
Found 21 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 20.08 mag. Found 223 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
22% of the Genie image region.
Genie image analysis:
Found 32753.8 counts in the large background region of 5841.0 pixels or a rate
of 5.608 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 19.36 mag. for a
4-arcsec aperture.
Found 1122.1 counts in the XRT position region of 196.0 pixels or a rate of
5.725 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.123 +/- 0.145 (1-sigma) cps or
20.45 mag and a range from 19.61 to 99.99 mag. The 3-sigma UL at the XRT
position is 0.557 cps or 18.81 mag. The closest srclist source has ra= 97.6149
dec= 9.5517 mag=16.60 sep=17.96". The closest Genie source has ra= 97.6149
dec= 9.5517 mag=16.04 sep=17.95".
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?
673019897 271 U srclist found no candidates.
673019897 271 U image found no candidates.
List afterglow candidates for other finding charts.
673019685 59 WHITE srclist found no candidates.
673019685 59 WHITE image found no candidates.
673020500 874 WHITE srclist found no candidates.
673020500 874 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 9.54753
GRB_ERROR: 5
GRB_RA: 97.61217
IMAGE_START_TIME: 13:58:12
MAGNITUDE: 18.8
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT