image overlap message for exposure 1 of trigger 1163401
uvot_overlap.pl vrs. 2010-12-20b fem started at 230409d11h40m13s537690usUT
The observation of trigger 1163401 started 2023-04-09T05:03:54.2
Examining file ./1163401_g417_uvot_sky_image.fits
The exposure ID is 702709434
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (329.5398,52.8519) with a roll angle of 121.3
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 (329.5300,52.8540) with a radius of 3.000 arc min
This is 0.375 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 (329.5147,52.8321) with a radius of 0.037 arc min
This is 1.497 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 0.000 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1163401
find_uvot_ag.pl vrs. 2023-03-28 fem started at 230409d11h40m16s583110usUT
Observation start time is 2023-04-09T05:03:54.2
Examining file ./1163401_g417_uvot_catalog_image.fits
The exposure ID is 702709434
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 51 detected source(s) for 1163401_g417
Aspect correction adds 0.00134 degrees (0.320 sec of time = 2.90 arc sec) to RA
Aspect correction adds -0.00090 degrees (-3.23 arcsec) to Dec
Total aspect correction is 4.34 arcsec
*** WARNING -- access to usno-b1 catalog failed.
Star catalogs centered at 329.5367 , 52.8525 with radius 2.70 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
Mean distance difference (CAT_DELTA) for 52 matched entries is 0.441" for 1163401_g417
Mean and std. dev of mag. difference (MAG_DELTA) are 1.687 and 0.529 for 1163401_g417
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 1163401_g417.
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=329.5300 (21:58:07.20) DEC=52.8540 (+52:51:14.4)
XRT distances are from RA=329.5147 (21:58:03.54) DEC=52.8321 (+52:49:55.6)
-----------------
Entry 22 in the list of sources is a candidate afterglow for 1163401_g417 with genie
ra=329.54833 (21:58:11.60) dec=52.86632 (+52:51:58.8) +/- 0.6" mag=16.90+/-0.14
dist=143.2 REFID=10 major=0.4 minor=0.3 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 59.6 arc sec from the BAT position.
Found 0 entries in star catalog(s) within 20.0" of the candidate.
printing all entries
(Entries within 2 arc sec of a source list entry are considered a match)
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 0.4
-----------------
Entry 26 in the list of sources is a candidate afterglow for 1163401_g417 with genie
ra=329.55260 (21:58:12.62) dec=52.86660 (+52:51:59.8) +/- 0.6" mag=16.96+/-0.14
dist=148.9 REFID=8 major=0.8 minor=0.7 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 66.9 arc sec from the BAT position.
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 1.2814431E+05 counts in the bkg source region of 4905.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 26.125 counts/pixel (5-sig UL in 4" is 19.58 mag) for 1163401_g417
Do not compute counts in XRT region because position is too far from center.
There are 1 candidate(s) outside XRT error circle with mag < 19.57
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.13, 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: 1163401_702709434_230409d11h40m16s583110usUT_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(329.5398,52.8519,45")
fk5;-circle(329.529564780568,52.8561649081486,6")
fk5;-circle(329.534652385643,52.8540867646862,6")
fk5;-circle(329.525192207721,52.8528776696694,6")
fk5;-circle(329.530508388878,52.8479145347652,6")
fk5;-circle(329.537816402165,52.8490552803186,6")
fk5;-circle(329.525495062482,52.8474840434042,6")
fk5;-circle(329.535937915136,52.8441358179082,6")
fk5;-circle(329.546321154343,52.8586316546968,6")
fk5;-circle(329.545925330194,52.8486255655413,6")
fk5;-circle(329.521716599009,52.8438578761314,6")
fk5;-circle(329.539601359726,52.8640902772803,6")
fk5;-circle(329.55286200976,52.85152167496,6")
fk5;-circle(329.536977904803,52.8406150387512,6")
fk5;-circle(329.543088495757,52.8416886582806,6")
image paragraph message for exposure 1 of trigger 1163401
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no overlap
SRCLIST PROBLEM: srclist filled telemetry buffer
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB230409 (Swift/BAT trigger 1163401) at 04:56:56 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 386 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 0.00% of the XRT error circle. No correction has been made for
the large, but uncertain, extinction expected.
------- notes for trigger 1163401 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 230409d11h40m21s612063usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1163401
-expid=702709434 -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/1163401/
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 702709434.22706 or about 2023:099:05:03:49 UT
Access to USNO star catalog FAILED. This increases the odds of a FALSE
afterglow detection. There was likely a PROBLEM with the srclist star catalog
because no stars found. Found 190 sources in srclist catalog. WARNING --
srclist catalog buffer filled. Found 15 srclist source(s) without IDs. There
are 0 good candidate(s) in the srclist catalog. Good candidates must be
brighter than 19.22 mag.
Access to USNO star catalog FAILED. This increases the odds of a FALSE
afterglow detection. Found 51 source(s) in Genie image catalog. Found 2 Genie
image source(s) without IDs. There are 0 good candidate(s) in the Genie image
catalog. Good candidates must be brighter than 20.13 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.
Genie image analysis:
Found 128144.3 counts in the large background region of 4905.0 pixels or a rate
of 26.125 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 19.40 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 18.41 mag. The closest srclist
source has ra= 329.5025 dec= 52.8365 mag=17.27 sep=31.04". The closest Genie
source has ra= 329.5145 dec= 52.8350 mag=19.19 sep=10.55".
This paragraph is only useful if the XRT position is grossly wrong. There are 1
candidate(s) in the image data with mag < 19.57 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=329.55260
(21:58:12.62), DEC=52.86660 (+52:51:59.8) (J2000). It has a mag of 16.96. It is
66.9" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 386 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 21:58:12.62 = 329.55260
DEC(J2000) = +52:51:59.8 = 52.86660
with a 90%-confidence error radius of about 0.61 arc sec. The estimated
magnitude is 16.96 with a 1-sigma error of about 0.14. No correction has been
made for the large, but uncertain, extinction expected.
This paragraph is only useful if the XRT position is grossly wrong. There are 7
candidate(s) in the srclist data with mag < 18.66 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=329.54838
(21:58:11.61), DEC=52.86639 (+52:51:59.0) (J2000). It has a mag of 13.86. It is
59.9" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 386 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 21:58:11.61 = 329.54838
DEC(J2000) = +52:51:59.0 = 52.86639
with a 90%-confidence error radius of about 1.10 arc sec. The estimated
magnitude is 13.86 with a 1-sigma error of about 0.35. No correction has been
made for the large, but uncertain, extinction expected.
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?
702709434 386 WHITE srclist found no candidates.
702709434 386 WHITE image found no candidates.
List afterglow candidates for other finding charts.
702709909 861 WHITE srclist found no candidates.
702709909 861 WHITE image found no candidates.
------- Tokens for Quick GCN -------