image overlap message for exposure 2 of trigger 1061511
uvot_overlap.pl vrs. 2010-12-20b fem started at 210726d00h10m35s630283usUT
The observation of trigger 1061511 started 2021-07-25T03:52:03.4
Examining file ./1061511_g300_uvot_sky_image.fits
The exposure ID is 648877923
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (215.3563,-1.1768) with a roll angle of 289.6
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 (215.3808,-1.1770) with a radius of 2.300 arc min
This is 1.471 arc min from the center of the uvot region
The area of the BAT error circle is 16.62 sq. arc min
The UVOT/BAT overlap is 5.62 sq. arc min or 0.34 of the BAT error circle
The XRT error circle is centered at (215.3741,-1.1927) with a radius of 0.032 arc min
This is 1.430 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 0.000 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1061511
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210726d00h10m47s819542usUT
Observation start time is 2021-07-25T03:52:03.4
Examining file ./1061511_g300_uvot_sources_image.fits
The exposure ID is 648877923
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 0 detected source(s) for 1061511_g300
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 215.3855 , -1.1901 with radius 2.00 arc min.
n_usno: 34 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.43936
RA DEC Mag Color
bright star 0: 215.37344 (14:21:29.62) -1.21956 (-01:13:10.4) 11.44 USNO-V
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1061511_g300.
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.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=215.3808 (14:21:31.40) DEC=-1.1770 (-01:10:37.2)
XRT distances are from RA=215.3741 (14:21:29.79) DEC=-1.1927 (-01:11:33.6)
Found 1 entries in star catalog(s) within 20" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
215.3692 -1.1913 18.5 -1 USNO-B1 20.45 18.97 19.62
The closest star is 18.48" away.
List UVOT sources within 20" of the XRT position:
There are 19763.146 counts in the bkg source region of 6314.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 3.130 counts/pixel (5-sig UL in 4" is 19.85 mag) for 1061511_g300
Do not compute counts in XRT region because position is too far from center.
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 20.40, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Results are questionable because aspect solution FAILED.
Region file: 1061511_648877923_210726d00h10m47s819542usUT_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(215.3563,-1.1768,45")
image paragraph message for exposure 2 of trigger 1061511
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB210725 (Swift/BAT trigger 1061511) at 03:47:02 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
273 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 none of the
XRT error circle. 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 0.047.
------- notes for trigger 1061511 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210726d00h10m52s317696usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1061511
-expid=648877923 -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/1061511/
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 648877923.4235 or about 2021:206:03:51:58 UT
Found 349 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 35 sources in
srclist catalog. Found 3 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 0 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 20.40 mag. Found 30 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 5% of the
Genie image region.
Genie image analysis:
Found 19763.1 counts in the large background region of 6314.0 pixels or a rate
of 3.130 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 19.69 mag. for a
4-arcsec aperture. The closest srclist source has ra= 215.3721 dec= -1.2011
mag=18.36 sep=31.08".
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?
648877923 272 U srclist found no candidates.
648877923 272 U image found no candidates.
List afterglow candidates for other finding charts.
648877764 113 WHITE srclist found no candidates.
648877764 113 WHITE image found no candidates.
648878526 875 WHITE srclist found no candidates.
648878526 875 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: -1.19267
GRB_ERROR: 5
GRB_RA: 215.37412
IMAGE_START_TIME: 03:51:58
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT