image overlap message for exposure 2 of trigger 1186295
uvot_overlap.pl vrs. 2010-12-20b fem started at 230820d19h53m25s688020usUT
The observation of trigger 1186295 started 2023-08-20T19:42:56.6
Examining file 1186295_g367_uvot_sky_image.fits
The exposure ID is 714253376
The exposure time is 249.946 (seconds)
The filter is U.
*** Warning -- no aspect solution was applied to the image.
consequently the calculated overlaps are questionable.
The uvot region is centered at (245.2931,-17.4369) with a roll angle of 280.2
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 (245.2630,-17.4180) with a radius of 3.000 arc min
This is 2.065 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 5.82 sq. arc min or 0.21 of the BAT error circle
The XRT error circle is centered at (245.2985,-17.4372) with a radius of 0.078 arc min
This is 0.308 arc min from the center of the uvot region
The area of the XRT error circle is 0.019 sq. arc min
The UVOT/XRT overlap is 0.019 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1186295
find_uvot_ag.pl vrs. 2023-04-25a fem started at 230820d19h53m26s742928usUT
Observation start time is 2023-08-20T19:42:56.6
Examining file 1186295_g367_uvot_sources_image.fits
The exposure ID is 714253376
The exposure is 249.946 sec.
The bin size is 2 pixels
The filter is U
There are 8 detected source(s) for 1186295_g367
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 245.2953 , -17.4235 with radius 2.00 arc min.
n_usno: 154 n_gsc: 117
Bright star catalog has no entries brighter than 12 mag
Found 8 entries without IDs and 8 entries that are acceptable afterglow candidates for 1186295_g367.
Acceptable entries have no ID, XRT distances < 11.75", 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=245.2630 (16:21:03.12) DEC=-17.4180 (-17:25:04.8)
XRT distances are from RA=245.2985 (16:21:11.64) DEC=-17.4372 (-17:26:13.9)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1186295_g367 with genie
ra=245.30736 (16:21:13.77) dec=-17.42122 (-17:25:16.4) +/- 0.8" mag=18.44+/-0.17
dist=65.1 REFID=1 major=1.6 minor=1.2 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 152.8 arc sec from the BAT position.
This source is near the edge of image (0.909)
Found 11 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)
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
245.3050 -17.4227 9.7 -1 USNO-B1 18.69 17.45 18.00 *
245.3052 -17.4198 9.0 -1 USNO-B1 19.30 17.70 18.41 *
245.3076 -17.4203 3.4 -1 USNO-B1 17.02 15.38 16.10 *
245.3089 -17.4172 15.3 -1 USNO-B1 18.29 16.80 17.46 *
245.3106 -17.4223 11.8 -1 USNO-B1 20.74 19.49 20.05 *
245.3050 -17.4227 9.7 -1 GSC2.3 17.62 18.53 99.99 *
245.3052 -17.4197 9.2 -1 GSC2.3 17.85 19.33 99.99 *
245.3076 -17.4203 3.5 -1 GSC2.3 15.37 17.00 99.99 *
245.3077 -17.4202 3.8 -1 GSC2.3 15.30 16.80 99.99 *
245.3089 -17.4172 15.4 -1 GSC2.3 16.96 18.18 99.99 *
245.3106 -17.4222 11.6 -1 GSC2.3 19.52 21.15 99.99 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 20.25" or brighter than 12 mag
-----------------
Entry 1 in the list of sources is a candidate afterglow for 1186295_g367 with genie
ra=245.29745 (16:21:11.39) dec=-17.42311 (-17:25:23.2) +/- 0.7" mag=15.67+/-0.14
dist=50.9 REFID=2 major=2.4 minor=1.8 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 119.7 arc sec from the BAT position.
Found 7 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
245.2918 -17.4222 19.7 -1 USNO-B1 19.26 18.27 18.71
245.2968 -17.4269 13.7 -1 USNO-B1 20.91 19.64 20.20
245.2989 -17.4277 17.4 -1 USNO-B1 20.69 19.68 20.13
245.2994 -17.4280 18.9 -1 USNO-B1 20.79 19.54 20.09
245.2918 -17.4222 19.6 -1 GSC2.3 18.16 19.39 99.99
245.2967 -17.4270 14.1 -1 GSC2.3 20.19 21.30 99.99
245.2989 -17.4279 18.0 -1 GSC2.3 19.69 21.66 99.99
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 2.4
-----------------
Entry 2 in the list of sources is a candidate afterglow for 1186295_g367 with genie
ra=245.29648 (16:21:11.16) dec=-17.42511 (-17:25:30.4) +/- 0.7" mag=15.03+/-0.14
dist=44.1 REFID=3 major=2.4 minor=1.5 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 117.8 arc sec from the BAT position.
Found 7 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
245.2918 -17.4222 19.2 -1 USNO-B1 19.26 18.27 18.71
245.2968 -17.4269 6.5 -1 USNO-B1 20.91 19.64 20.20 *
245.2989 -17.4277 12.6 -1 USNO-B1 20.69 19.68 20.13 *
245.2994 -17.4280 14.6 -1 USNO-B1 20.79 19.54 20.09
245.2918 -17.4222 19.2 -1 GSC2.3 18.16 19.39 99.99
245.2967 -17.4270 6.8 -1 GSC2.3 20.19 21.30 99.99 *
245.2989 -17.4279 13.1 -1 GSC2.3 19.69 21.66 99.99 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 13.5" or brighter than 12 mag
-----------------
Entry 3 in the list of sources is a candidate afterglow for 1186295_g367 with genie
ra=245.30198 (16:21:12.48) dec=-17.41965 (-17:25:10.8) +/- 0.7" mag=16.09+/-0.14
dist=64.3 REFID=4 major=1.1 minor=0.8 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 134.0 arc sec from the BAT position.
Found 7 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
245.3050 -17.4227 14.9 -1 USNO-B1 18.69 17.45 18.00
245.3052 -17.4198 11.1 -1 USNO-B1 19.30 17.70 18.41 *
245.3076 -17.4203 19.3 -1 USNO-B1 17.02 15.38 16.10
245.3050 -17.4227 15.0 -1 GSC2.3 17.62 18.53 99.99
245.3052 -17.4197 11.0 -1 GSC2.3 17.85 19.33 99.99 *
245.3076 -17.4203 19.4 -1 GSC2.3 15.37 17.00 99.99
245.3077 -17.4202 19.7 -1 GSC2.3 15.30 16.80 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 13.5" or brighter than 12 mag
-----------------
Entry 4 in the list of sources is a candidate afterglow for 1186295_g367 with genie
ra=245.30020 (16:21:12.05) dec=-17.42073 (-17:25:14.6) +/- 0.7" mag=15.68+/-0.14
dist=59.6 REFID=5 major=2.1 minor=1.3 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 128.2 arc sec from the BAT position.
Found 4 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
245.3050 -17.4227 17.8 -1 USNO-B1 18.69 17.45 18.00
245.3052 -17.4198 17.5 -1 USNO-B1 19.30 17.70 18.41
245.3050 -17.4227 17.9 -1 GSC2.3 17.62 18.53 99.99
245.3052 -17.4197 17.5 -1 GSC2.3 17.85 19.33 99.99
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 2.1
-----------------
Entry 5 in the list of sources is a candidate afterglow for 1186295_g367 with genie
ra=245.28324 (16:21:07.98) dec=-17.42681 (-17:25:36.5) +/- 0.7" mag=15.40+/-0.14
dist=64.4 REFID=6 major=1.3 minor=0.9 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 76.4 arc sec from the BAT position.
Found 3 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
245.2874 -17.4276 14.6 -1 USNO-B1 99.99 19.81 99.99
245.2826 -17.4223 16.5 -1 USNO-B1 99.99 18.78 99.99
245.2874 -17.4275 14.5 -1 GSC2.3 20.31 99.99 99.99
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 6 in the list of sources is a candidate afterglow for 1186295_g367 with genie
ra=245.28746 (16:21:08.99) dec=-17.42732 (-17:25:38.4) +/- 0.7" mag=14.66+/-0.14
dist=52.0 REFID=7 major=3.6 minor=1.6 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 90.5 arc sec from the BAT position.
Found 2 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
245.2874 -17.4276 0.9 -1 USNO-B1 99.99 19.81 99.99 *
245.2874 -17.4275 0.8 -1 GSC2.3 20.31 99.99 99.99 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 13.5" or brighter than 12 mag
-----------------
Entry 7 in the list of sources is a candidate afterglow for 1186295_g367 with genie
ra=245.29330 (16:21:10.39) dec=-17.42713 (-17:25:37.7) +/- 0.7" mag=14.00+/-0.14
dist=40.4 REFID=8 major=2.1 minor=1.3 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 109.1 arc sec from the BAT position.
Found 6 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
245.2918 -17.4222 18.6 -1 USNO-B1 19.26 18.27 18.71
245.2968 -17.4269 12.1 -1 USNO-B1 20.91 19.64 20.20 *
245.2989 -17.4277 19.4 -1 USNO-B1 20.69 19.68 20.13
245.2918 -17.4222 18.5 -1 GSC2.3 18.16 19.39 99.99
245.2967 -17.4270 11.8 -1 GSC2.3 20.19 21.30 99.99 *
245.2989 -17.4279 19.5 -1 GSC2.3 19.69 21.66 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 13.5" or brighter than 12 mag
Found 11 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
245.2962 -17.4334 15.9 -1 USNO-B1 21.85 19.52 20.55
245.2946 -17.4376 13.5 -1 USNO-B1 20.80 19.31 19.97
245.2950 -17.4377 12.3 -1 USNO-B1 20.74 19.68 20.15
245.2983 -17.4397 9.1 -1 USNO-B1 21.49 19.41 20.33
245.3021 -17.4393 14.4 -1 USNO-B1 20.61 19.01 19.72
245.3021 -17.4395 14.8 -1 USNO-B1 21.07 18.91 19.87
245.2959 -17.4337 15.5 -1 GSC2.3 19.53 22.20 99.99
245.2946 -17.4377 13.5 -1 GSC2.3 19.72 20.87 99.99
245.3028 -17.4362 15.3 -1 GSC2.3 99.99 22.35 99.99
245.2983 -17.4396 8.6 -1 GSC2.3 19.82 21.37 99.99
245.3021 -17.4396 15.0 -1 GSC2.3 18.79 21.27 99.99
The closest star is 8.65" away.
List UVOT sources within 20" of the XRT position:
There are 32516.172 counts in the bkg source region of 6008.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 5.412 counts/pixel (5-sig UL in 4" is 19.55 mag) for 1186295_g367
There are 844.33411 counts in the xrt source region of 203.00000 pixels.
Rate in xrt region with 8 arcsec radius is 4.159 counts/pixel for 1186295_g367
There are 5950.2832 counts in the xrt_bkg source region of 1251.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 4.756 counts/pixel (5-sig UL in 4" is 19.62 mag) for 1186295_g367
There are 1 candidate(s) outside XRT error circle with mag < 19.54
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.10, XRT distances < 11.75",
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: 1186295_714253376_230820d19h53m26s742928usUT_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(245.2931,-17.4369,45")
fk5;-circle(245.296480740735,-17.4251085080233,6")
fk5;-circle(245.283240216405,-17.4268080014178,6")
fk5;-circle(245.287458278207,-17.4273216426027,6")
fk5;-circle(245.293299542001,-17.4271306259913,6")
Region file: 1186295_714253376_230820d19h53m26s742928usUT_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(245.2985,-17.4372,8")
Region file: 1186295_714253376_230820d19h53m26s742928usUT_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(245.2985,-17.4372,25")
fk5;-circle(245.2985,-17.4372,15")
image paragraph message for exposure 2 of trigger 1186295
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 GRB230820 (Swift/BAT trigger 1186295) at 19:36:48 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
336 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 0.278.
------- notes for trigger 1186295 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 230820d19h53m28s549137usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1186295
-expid=714253376 -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/1186295/
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 714253376.58562 or about 2023:232:19:42:51 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.
Found 8 source(s) in Genie image catalog. Found 8 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 150 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 26% of the
Genie image region. The closest Genie source has ra= 245.2933 dec= -17.4271
mag=14.00 sep=40.41".
This paragraph is only useful if the XRT position is grossly wrong. There are 1
candidate(s) in the image data with mag < 19.54 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=245.28324
(16:21:07.98), DEC=-17.42681 (-17:25:36.5) (J2000). It has a mag of 15.40. It
is 76.4" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 250 seconds with the U filter starting
336 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 16:21:07.98 = 245.28324
DEC(J2000) = -17:25:36.5 = -17.42681
with a 90%-confidence error radius of about 0.75 arc sec. The estimated
magnitude is 15.40 with a 1-sigma error of about 0.14. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.278.
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?
714253376 336 U srclist data are not available.
714253376 336 U image found no candidates.
List afterglow candidates for other finding charts.
714253218 178 ? srclist data are not available.
714253218 178 WHITE image found no candidates.
------- Tokens for Quick GCN -------