image overlap message for exposure 1 of trigger 1185505
uvot_overlap.pl vrs. 2010-12-20b fem started at 230815d21h55m53s900634usUT
The observation of trigger 1185505 started 2023-08-15T10:53:02.9
Examining file ./1185505_g186_uvot_sky_image.fits
The exposure ID is 713789582
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (184.7149,-58.0498) with a roll angle of 320.6
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 (184.7720,-58.0650) with a radius of 3.000 arc min
This is 2.029 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 6.18 sq. arc min or 0.22 of the BAT error circle
The XRT error circle is centered at (184.7234,-58.0533) with a radius of 0.032 arc min
This is 0.340 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 0.003 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1185505
find_uvot_ag.pl vrs. 2023-04-25a fem started at 230815d21h56m05s657275usUT
Observation start time is 2023-08-15T10:53:02.9
Examining file ./1185505_g186_uvot_catalog_image.fits
The exposure ID is 713789582
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 41 detected source(s) for 1185505_g186
Aspect correction adds -0.00239 degrees (-0.573 sec of time = -4.55 arc sec) to RA
Aspect correction adds 0.00112 degrees ( 4.02 arcsec) to Dec
Total aspect correction is 6.07 arcsec
Star catalogs centered at 184.7177 , -58.0511 with radius 2.76 arc min.
n_usno: 575 n_gsc: 671
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.89518
RA DEC Mag Color
bright star 0: 184.74283 (12:18:58.28) -58.03661 (-58:02:11.8) 11.90 USNO-V
Mean distance difference (CAT_DELTA) for 49 matched entries is 0.911" for 1185505_g186
Mean and std. dev of mag. difference (MAG_DELTA) are 1.446 and 0.958 for 1185505_g186
Found 3 entries without IDs and 2 entries that are acceptable afterglow candidates for 1185505_g186.
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.
1 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=184.7720 (12:19:05.28) DEC=-58.0650 (-58:03:54.0)
XRT distances are from RA=184.7234 (12:18:53.61) DEC=-58.0533 (-58:03:11.8)
-----------------
Entry 22 in the list of sources is a candidate afterglow for 1185505_g186 with genie
ra=184.69502 (12:18:46.80) dec=-58.05999 (-58:03:36.0) +/- 0.6" mag=14.27+/-0.14
dist=59.2 REFID=29 major=1.2 minor=1.0 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 147.7 arc sec from the BAT position.
Found 14 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)
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
184.6936 -58.0601 2.7 -1 USNO-B1 14.23 12.70 13.38 *
184.6922 -58.0595 5.7 -1 USNO-B1 99.99 16.47 99.99
184.6914 -58.0589 8.0 -1 USNO-B1 16.68 15.63 16.10
184.6999 -58.0646 19.0 -1 USNO-B1 19.23 18.16 18.64
184.6930 -58.0645 16.7 -1 USNO-B1 17.74 17.00 17.33
184.6977 -58.0557 16.2 -1 GSC2.3 99.99 20.53 99.99
184.6911 -58.0565 14.5 -1 GSC2.3 99.99 21.93 99.99
184.6941 -58.0602 1.9 -1 GSC2.3 12.23 13.41 12.75 *
184.6980 -58.0627 11.4 -1 GSC2.3 19.37 20.88 99.99
184.6909 -58.0586 9.3 -1 GSC2.3 16.70 17.78 17.18
184.6998 -58.0646 19.0 -1 GSC2.3 18.36 19.85 99.99
184.6925 -58.0609 5.9 -1 GSC2.3 99.99 99.99 99.99
184.6866 -58.0571 19.1 -1 GSC2.3 99.99 21.24 99.99
184.6925 -58.0651 19.2 -1 GSC2.3 18.62 19.38 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 50 in the list of sources is a candidate afterglow for 1185505_g186 with genie
ra=184.68411 (12:18:44.19) dec=-58.07443 (-58:04:27.9) +/- 0.6" mag=18.57+/-0.15
dist=106.7 REFID=2 major=0.9 minor=0.4 flag=16 (aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 170.7 arc sec from the BAT position.
This source is near the edge of image (0.964)
Found 20 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
184.6935 -58.0737 18.1 -1 USNO-B1 16.86 15.18 15.92
184.6926 -58.0735 16.5 -1 USNO-B1 17.03 15.59 16.23
184.6930 -58.0736 17.1 -1 USNO-B1 15.68 15.41 15.53
184.6822 -58.0696 17.7 -1 USNO-B1 16.94 16.41 16.64
184.6931 -58.0743 17.1 -1 USNO-B1 20.85 16.06 18.19
184.6927 -58.0757 17.0 -1 USNO-B1 19.91 18.61 19.19
184.6801 -58.0731 9.0 -1 USNO-B1 17.71 16.09 16.81
184.6842 -58.0751 2.4 -1 USNO-B1 17.39 14.73 15.91 *
184.6887 -58.0789 18.3 -1 USNO-B1 21.18 19.29 20.13
184.6843 -58.0775 11.1 -1 USNO-B1 18.90 16.49 17.56
184.6927 -58.0735 16.7 -1 GSC2.3 15.31 15.88 15.85
184.6822 -58.0697 17.5 -1 GSC2.3 16.80 17.79 17.26
184.6876 -58.0735 7.5 -1 GSC2.3 99.99 22.00 99.99
184.6934 -58.0758 18.4 -1 GSC2.3 18.25 20.19 99.99
184.6842 -58.0729 5.6 -1 GSC2.3 18.59 20.66 99.99
184.6799 -58.0730 9.4 -1 GSC2.3 16.10 17.97 16.86
184.6840 -58.0750 2.1 -1 GSC2.3 14.51 17.01 15.18 *
184.6887 -58.0788 18.1 -1 GSC2.3 18.64 20.33 99.99
184.6837 -58.0776 11.4 -1 GSC2.3 16.71 18.39 17.41
184.6801 -58.0781 15.4 -1 GSC2.3 99.99 21.92 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" or brighter than 12 mag
Found 3 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
184.7272 -58.0547 9.0 -1 USNO-B1 16.41 15.81 16.08
184.7218 -58.0506 10.0 -1 GSC2.3 99.99 21.60 99.99
184.7268 -58.0545 8.0 -1 GSC2.3 15.90 16.68 16.26
The closest star is 7.96" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=184.72708 (12:18:54.50) dec=-58.05462 (-58:03:16.6) +/- 0.6" mag=17.48+/-0.14 dist=8.5 REFID=26 flag=0
There are 1.0742798E+05 counts in the bkg source region of 5265.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 20.404 counts/pixel (5-sig UL in 4" is 19.71 mag) for 1185505_g186
There are 4653.1143 counts in the xrt source region of 199.00000 pixels.
Rate in xrt region with 8 arcsec radius is 23.382 counts/pixel for 1185505_g186
There are 21484.867 counts in the xrt_bkg source region of 1052.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 20.423 counts/pixel (5-sig UL in 4" is 19.71 mag) for 1185505_g186
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 20.27, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1185505_713789582_230815d21h56m05s657275usUT_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(184.7149,-58.0498,45")
fk5;-circle(184.727078429947,-58.0546207682431,6")
fk5;-circle(184.717090723546,-58.0593695087912,6")
fk5;-circle(184.730049025993,-58.0609766181259,6")
fk5;-circle(184.739706647239,-58.0542836174759,6")
fk5;-circle(184.713223226443,-58.0502491526067,6")
fk5;-circle(184.709709133437,-58.053565002998,6")
fk5;-circle(184.738391260674,-58.0507877571484,6")
fk5;-circle(184.72860469221,-58.0456581271049,6")
fk5;-circle(184.730056325157,-58.0442633098899,6")
fk5;-circle(184.702976934775,-58.0506659785141,6")
fk5;-circle(184.707905897926,-58.0400474873762,6")
fk5;-circle(184.701467702144,-58.0415842349651,6")
fk5;-circle(184.689925378042,-58.0464186119671,6")
Region file: 1185505_713789582_230815d21h56m05s657275usUT_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(184.72338,-58.05328,8")
Region file: 1185505_713789582_230815d21h56m05s657275usUT_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(184.72338,-58.05328,25")
fk5;-circle(184.72338,-58.05328,15")
fk5;-circle(184.717090723546,-58.0593695087912,6")
fk5;-circle(184.730049025993,-58.0609766181259,6")
fk5;-circle(184.713223226443,-58.0502491526067,6")
fk5;-circle(184.709709133437,-58.053565002998,6")
fk5;-circle(184.738391260674,-58.0507877571484,6")
fk5;-circle(184.72860469221,-58.0456581271049,6")
image paragraph message for exposure 1 of trigger 1185505
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: high density of stars
SRCLIST PROBLEM: high density of stars, srclist filled telemetry buffer
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
1 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB230815 (Swift/BAT trigger 1185505) at 10:49:55 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
18409 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. Because of the density of catalogued stars, further analysis
is required to report an upper limit for any afterglow in the sub-image. The
8'x8' region for the list of sources generated on-board covers 100% of the XRT
error circle. Because of the density of catalogued stars, further analysis is
required to report an upper limit for any afterglow in the region. No
correction has been made for the large, but uncertain, extinction expected.
------- notes for trigger 1185505 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 230815d21h56m23s521563usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1185505
-expid=713807836 -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/1185505/
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 713807836.81292 or about 2023:227:15:57:11 UT
Since the srclist star catalog filled its buffer, the sensitivity for an
afterglow may be REDUCED. The stars will eliminate afterglows from about 61%
or more of the srclist region. Found 190 sources in srclist catalog. WARNING --
srclist catalog buffer filled. Found 51 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 13 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. 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
19.97 mag. Found 527 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 59% of the Genie image region.
Genie image analysis:
Found 41553.4 counts in the large background region of 6043.0 pixels or a rate
of 6.876 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 19.24 mag. for a
4-arcsec aperture.
Found 1439.4 counts in the XRT position region of 200.0 pixels or a rate of
7.197 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.298 +/- 0.163 (1-sigma) cps or
19.47 mag and a range from 19.00 to 20.33 mag. The 3-sigma UL at the XRT
position is 0.788 cps or 18.42 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.21 mag. The closest
srclist source has ra= 184.6951 dec= -58.0601 mag=15.66 sep=59.16".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 184.7271 dec= -58.0546 mag=17.69 sep=8.60". The closest Genie
source has ra= 184.7271 dec= -58.0546 mag=17.69 sep=8.60".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 250 seconds with the U filter starting
18409 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 12:18:54.50 = 184.72710
DEC(J2000) = -58:03:16.7 = -58.05463
with a 90%-confidence error radius of about 0.64 arc sec. This position is 8.60
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.69 with a 1-sigma error of about 0.15. 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?
713807836 18408 U srclist found no candidates.
713807836 18408 U image found no candidates.
List afterglow candidates for other finding charts.
713789582 154 ? srclist data are not available.
713789582 154 WHITE image found no candidates.
713808092 18664 B srclist found no candidates.
713808092 18664 B image found no candidates.
713811725 22297 B srclist found no candidates.
713811725 22297 B image found no candidates.
713812038 22610 ? srclist data are not available.
713812038 22610 U image found no candidates.
713817179 27751 U srclist found no candidates.
713817179 27751 U image found no candidates.
713817434 28006 B srclist found no candidates.
713817434 28006 B image found no candidates.
713817748 28320 U srclist found no candidates.
713817748 28320 U image found no candidates.
713818003 28575 B srclist found no candidates.
713818003 28575 B image found no candidates.
713828679 39251 U srclist found no candidates.
713828679 39251 U image found no candidates.
713828934 39506 B srclist found no candidates.
713828934 39506 ? image data are not available.
------- Tokens for Quick GCN -------