image overlap message for exposure 2 of trigger 1061554
uvot_overlap.pl vrs. 2010-12-20b fem started at 210725d15h35m57s992160usUT
The observation of trigger 1061554 started 2021-07-25T12:07:02.2
Examining file ./1061554_g373_uvot_sky_image.fits
The exposure ID is 648907622
The exposure time is 92.559 (seconds)
The filter is B.
The uvot region is centered at (192.9262,17.1259) with a roll angle of 283.8
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 (192.9320,17.1250) with a radius of 3.000 arc min
This is 0.335 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 (192.9222,17.1081) with a radius of 0.042 arc min
This is 1.094 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 2 of trigger 1061554
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210725d15h36m11s380905usUT
Observation start time is 2021-07-25T12:07:02.2
Examining file ./1061554_g373_uvot_catalog_image.fits
The exposure ID is 648907622
The exposure is 92.559 sec.
The bin size is 2 pixels
The filter is B
There are 2 detected source(s) for 1061554_g373
Aspect correction adds -0.00055 degrees (-0.131 sec of time = -1.88 arc sec) to RA
Aspect correction adds 0.00041 degrees ( 1.49 arcsec) to Dec
Total aspect correction is 2.40 arcsec
Star catalogs centered at 192.9308 , 17.1180 with radius 2.00 arc min.
n_usno: 59 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 2 matched entries is 0.470" for 1061554_g373
Mean and std. dev of mag. difference (MAG_DELTA) are 0.260 and 0.010 for 1061554_g373
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1061554_g373.
Acceptable entries have no ID, XRT distances < 6.25", 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=192.9320 (12:51:43.68) DEC=17.1250 (+17:07:30.0)
XRT distances are from RA=192.9222 (12:51:41.32) DEC=17.1081 (+17:06:29.1)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 19209.064 counts in the bkg source region of 6165.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 3.116 counts/pixel (5-sig UL in 4" is 19.55 mag) for 1061554_g373
There are 617.83765 counts in the xrt source region of 202.00000 pixels.
Rate in xrt region with 8 arcsec radius is 3.059 counts/pixel for 1061554_g373
XRT source is too far (65.6331427970709") from center -- do not compute local background.
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 20.10, XRT distances < 6.25",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1061554_648907622_210725d15h36m11s380905usUT_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(192.9262,17.1259,45")
fk5;-circle(192.924461357267,17.1250007813959,6")
fk5;-circle(192.9243509867,17.113095544652,6")
Region file: 1061554_648907622_210725d15h36m11s380905usUT_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(192.92217,17.10808,8")
image paragraph message for exposure 2 of trigger 1061554
------ Start for Possible Stand-alone Circular ----
In response to GRB210725 (Swift/BAT trigger 1061554) at 12:00:48 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 93 seconds with the B filter starting
346 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 of about 0.1 magnitudes.
------- notes for trigger 1061554 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210725d15h36m15s498181usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1061554
-expid=648907622 -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/1061554/
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 648907622.24486 or about 2021:206:12:06:57 UT
Found 341 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 5 sources in
srclist catalog. Found 0 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
17.58 mag.
Found 2 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 20.10 mag. Found 55 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 9% of the
Genie image region.
Genie image analysis:
Found 19209.1 counts in the large background region of 6165.0 pixels or a rate
of 3.116 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.
Found 617.8 counts in the XRT position region of 202.0 pixels or a rate of
3.058 counts/pixel in a radius of 8.0 arcsec. The net count rate (using large
background region) at the XRT position is -0.125 +/- 0.272 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.815 cps or 19.16 mag. The closest srclist
source has ra= 192.9666 dec= 17.0863 mag=17.78 sep=171.92". The closest Genie
source has ra= 192.9244 dec= 17.1131 mag=18.68 sep=19.55".
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?
648907622 346 B srclist found no candidates.
648907622 346 B image found no candidates.
List afterglow candidates for other finding charts.
648907367 91 U srclist found no candidates.
648907367 91 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: b
GRB_DEC: 17.10808
GRB_ERROR: 6.25
GRB_RA: 192.92217
IMAGE_START_TIME: 12:06:57
MAGNITUDE: 19.2
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT