image overlap message for exposure 2 of trigger 1098132
uvot_overlap.pl vrs. 2010-12-20b fem started at 220320d07h21m57s831100usUT
The observation of trigger 1098132 started 2022-03-19T17:46:19.7
Examining file ./1098132_g345_uvot_sky_image.fits
The exposure ID is 669404779
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (218.2107,61.2952) with a roll angle of 42.8
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 (218.2070,61.2890) with a radius of 3.000 arc min
This is 0.389 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 (218.2242,61.2950) with a radius of 0.037 arc min
This is 0.389 arc min from the center of the uvot region
The area of the XRT error circle is 0.004 sq. arc min
The UVOT/XRT overlap is 0.004 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1098132
find_uvot_ag.pl vrs. 2020-10-30 fem started at 220320d07h22m14s580176usUT
Observation start time is 2022-03-19T17:46:19.7
Examining file ./1098132_g345_uvot_catalog_image.fits
The exposure ID is 669404779
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 6 detected source(s) for 1098132_g345
Aspect correction adds -0.00006 degrees (-0.014 sec of time = -0.10 arc sec) to RA
Aspect correction adds 0.00188 degrees ( 6.78 arcsec) to Dec
Total aspect correction is 6.78 arcsec
Star catalogs centered at 218.2106 , 61.2906 with radius 2.37 arc min.
n_usno: 53 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 7 matched entries is 0.834" for 1098132_g345
Mean and std. dev of mag. difference (MAG_DELTA) are 0.643 and 0.542 for 1098132_g345
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1098132_g345.
Acceptable entries have no ID, XRT distances < 5.5", 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=218.2070 (14:32:49.68) DEC=61.2890 (+61:17:20.4)
XRT distances are from RA=218.2242 (14:32:53.81) DEC=61.2950 (+61:17:41.9)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 8843.5127 counts in the bkg source region of 6208.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 1.425 counts/pixel (5-sig UL in 4" is 20.27 mag) for 1098132_g345
There are 276.43796 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 1.382 counts/pixel for 1098132_g345
There are 1796.2922 counts in the xrt_bkg source region of 1243.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 1.445 counts/pixel (5-sig UL in 4" is 20.27 mag) for 1098132_g345
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 20.83, XRT distances < 5.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1098132_669404779_220320d07h22m14s580176usUT_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(218.2107,61.2952,45")
fk5;-circle(218.19948914207,61.3051998571496,6")
Region file: 1098132_669404779_220320d07h22m14s580176usUT_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(218.22421,61.29497,8")
Region file: 1098132_669404779_220320d07h22m14s580176usUT_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(218.22421,61.29497,25")
fk5;-circle(218.22421,61.29497,15")
image paragraph message for exposure 2 of trigger 1098132
------ Start for Possible Stand-alone Circular ----
In response to GRB220319 (Swift/BAT trigger 1098132) at 17:40:33 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
317 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 expected extinction corresponding to E(B-V) of
0.010.
------- notes for trigger 1098132 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 220320d07h22m20s932207usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1098132
-expid=669404779 -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/1098132/
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 669404779.70908 or about 2022:078:17:46:14 UT
Found 527 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 62 sources in
srclist catalog. Found 35 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 6 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 20.83 mag. Found 49 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 8843.5 counts in the large background region of 6208.0 pixels or a rate
of 1.425 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 20.11 mag. for a
4-arcsec aperture.
Found 276.4 counts in the XRT position region of 200.0 pixels or a rate of
1.382 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.051 +/- 0.072 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.216 cps or 19.84 mag. The closest srclist
source has ra= 218.2067 dec= 61.2792 mag=16.84 sep=64.26". The closest Genie
source has ra= 218.1995 dec= 61.3052 mag=19.85 sep=56.41".
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?
669404779 316 U srclist found no candidates.
669404779 316 U image found no candidates.
List afterglow candidates for other finding charts.
669404566 103 ? srclist data are not available.
669404566 103 WHITE image found no candidates.
669405333 870 WHITE srclist found no candidates.
669405333 870 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 61.29497
GRB_ERROR: 5.5
GRB_RA: 218.22421
IMAGE_START_TIME: 17:46:14
MAGNITUDE: 19.8
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT