image overlap message for exposure 3 of trigger 1162001
uvot_overlap.pl vrs. 2010-12-20b fem started at 230328d19h03m09s308742usUT
The observation of trigger 1162001 started 2023-03-28T15:09:36.3
Examining file ./1162001_g887_uvot_sky_image.fits
The exposure ID is 701708976
The exposure time is 14.374 (seconds)
The filter is WHITE.
*** Warning -- found 7093 null pixels in the image.
The uvot region is centered at (291.0149,80.0168) with a roll angle of 103.1
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 (290.9860,80.0160) with a radius of 3.000 arc min
This is 0.304 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 (291.0071,80.0095) with a radius of 0.035 arc min
This is 0.445 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 3 of trigger 1162001
find_uvot_ag.pl vrs. 2023-03-28 fem started at 230328d19h03m36s475122usUT
Observation start time is 2023-03-28T15:09:36.3
Examining file ./1162001_g887_uvot_sources_image.fits
The exposure ID is 701708976
The exposure is 14.374 sec.
The bin size is 2 pixels
The filter is WHITE
There are 1 detected source(s) for 1162001_g887
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
*** WARNING -- access to usno-b1 catalog failed.
Star catalogs centered at 290.9887 , 80.0314 with radius 2.00 arc min.
n_usno: -1 n_gsc: 0
*** WARNING -- no star catalog entries found.
-- this strongly suggests a problem with the catalogs.
-- cannot check for bright stars or nearby sources.
-- there is a high risk of false positives.
Bright star catalog has no entries brighter than 12 mag
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1162001_g887.
Acceptable entries have no ID, XRT distances < 5.25", 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=290.9860 (19:23:56.64) DEC=80.0160 (+80:00:57.6)
XRT distances are from RA=291.0071 (19:24:01.71) DEC=80.0095 (+80:00:34.3)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1162001_g887 with genie
ra=290.98870 (19:23:57.29) dec=80.03140 (+80:01:53.0) +/- 0.8" mag=17.52+/-0.18
dist=79.6 REFID=1 major=0.9 minor=0.9 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 55.5 arc sec from the BAT position.
Found 0 entries in star catalog(s) within 20.0" of the candidate.
printing all entries
(Entries within 12 arc sec of a source list entry are considered a match)
*** If XRT position is correct, then this is NOT the afterglow
Found 0 entries in star catalog(s) within 20" of the XRT position.
List UVOT sources within 20" of the XRT position:
There are 16234.765 counts in the bkg source region of 6017.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 2.698 counts/pixel (5-sig UL in 4" is 18.27 mag) for 1162001_g887
There are 561.36963 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 2.807 counts/pixel for 1162001_g887
There are 2511.0305 counts in the xrt_bkg source region of 918.00000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 2.735 counts/pixel (5-sig UL in 4" is 18.26 mag) for 1162001_g887
There are 1 candidate(s) outside XRT error circle with mag < 18.26
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.82, XRT distances < 5.25",
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: 1162001_701708976_230328d19h03m36s475122usUT_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(291.0149,80.0168,45")
Region file: 1162001_701708976_230328d19h03m36s475122usUT_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(291.00712,80.00953,8")
Region file: 1162001_701708976_230328d19h03m36s475122usUT_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(291.00712,80.00953,25")
fk5;-circle(291.00712,80.00953,15")
image paragraph message for exposure 3 of trigger 1162001
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no aspect solution
SRCLIST PROBLEM: no srclist afterglow info
See notes for more details.
------ Start for Possible Stand-alone Circular ----
In response to GRB230328 (Swift/BAT trigger 1162001) at 14:54:48 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 14 seconds with the White filter
starting 856 seconds after the BAT trigger. No credible afterglow candidate has
been found in the initial data products. The 2.7'x2.7' sub-image processing
FAILED because of no aspect solution. Results from the list of sources
generated on-board are not available at this time. No correction has been made
for the expected extinction corresponding to E(B-V) of 0.070.
------- notes for trigger 1162001 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 230328d19h03m40s165021usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1162001
-expid=701708976 -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/1162001/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 701708976.2572 or about 2023:087:15:09:31 UT
No information found about the number of stars in the star catalog for srclist
region.
THERE IS NO ASPECT SOLUTION for the image data.
Access to USNO star catalog FAILED. This increases the odds of a FALSE
afterglow detection. Found 1 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 18.82 mag. Found 0 stars in
largest star catalog for Genie image region. The stars will eliminate
afterglows from about 0% of the Genie image region. The Genie image is
INCOMPLETE with 7093 null pixels.
The closest Genie source has ra= 290.9887 dec= 80.0314 mag=17.52 sep=79.56".
This paragraph is only useful if the XRT position is grossly wrong. There are 1
candidate(s) in the image data with mag < 18.26 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=290.98870
(19:23:57.29), DEC=80.03140 (+80:01:53.0) (J2000). It has a mag of 17.52. It is
55.5" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 14 seconds with the White filter
starting 856 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 19:23:57.29 = 290.98870
DEC(J2000) = +80:01:53.0 = 80.03140
with a 90%-confidence error radius of about 0.81 arc sec. The estimated
magnitude is 17.52 with a 1-sigma error of about 0.18. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.070.
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?
701708976 856 WHITE srclist data are not available.
701708976 856 WHITE image found no candidates.
List afterglow candidates for other finding charts.
701708233 113 WHITE 291.00842 80.00978 19.01/19.2 1.2 srclist Yes
701708233 113 WHITE 291.00765 80.00959 18.22/20.9 0.4 image Yes
701708445 325 U srclist found no candidates.
701708445 325 U 291.00803 80.00956 19.32/20.4 0.6 image Yes
------- Tokens for Quick GCN -------