image overlap message for exposure 2 of trigger 1185505
uvot_overlap.pl vrs. 2010-12-20b fem started at 230815d21h55m54s647450usUT
The observation of trigger 1185505 started 2023-08-15T15:57:16.8
Examining file ./1185505_g18440_uvot_sky_image.fits
The exposure ID is 713807836
The exposure time is 249.879 (seconds)
The filter is U.
The uvot region is centered at (184.7134,-58.0520) with a roll angle of 310.8
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 2.018 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 6.22 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 0.326 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 2 of trigger 1185505
find_uvot_ag.pl vrs. 2023-04-25a fem started at 230815d21h56m18s262123usUT
Observation start time is 2023-08-15T15:57:16.8
Examining file ./1185505_g18440_uvot_catalog_image.fits
The exposure ID is 713807836
The exposure is 249.879 sec.
The bin size is 2 pixels
The filter is U
There are 13 detected source(s) for 1185505_g18440
Aspect correction adds -0.00195 degrees (-0.468 sec of time = -3.71 arc sec) to RA
Aspect correction adds 0.00161 degrees ( 5.79 arcsec) to Dec
Total aspect correction is 6.88 arcsec
Star catalogs centered at 184.7198 , -58.0536 with radius 2.47 arc min.
n_usno: 462 n_gsc: 542
*** 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 17 matched entries is 0.730" for 1185505_g18440
Mean and std. dev of mag. difference (MAG_DELTA) are 1.320 and 1.151 for 1185505_g18440
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1185505_g18440.
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=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 8 in the list of sources is a candidate afterglow for 1185505_g18440 with genie
ra=184.69503 (12:18:46.81) dec=-58.06003 (-58:03:36.1) +/- 0.6" mag=14.04+/-0.14
dist=59.2 REFID=11 major=1.5 minor=1.3 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
184.6999 -58.0646 18.8 -1 USNO-B1 19.23 18.16 18.64
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 8.1 -1 USNO-B1 16.68 15.63 16.10
184.6930 -58.0645 16.6 -1 USNO-B1 17.74 17.00 17.33
184.6977 -58.0557 16.3 -1 GSC2.3 99.99 20.53 99.99
184.6980 -58.0627 11.2 -1 GSC2.3 19.37 20.88 99.99
184.6941 -58.0602 1.8 -1 GSC2.3 12.23 13.41 12.75 *
184.6998 -58.0646 18.8 -1 GSC2.3 18.36 19.85 99.99
184.6911 -58.0565 14.7 -1 GSC2.3 99.99 21.93 99.99
184.6909 -58.0586 9.4 -1 GSC2.3 16.70 17.78 17.18
184.6925 -58.0609 5.8 -1 GSC2.3 99.99 99.99 99.99
184.6866 -58.0571 19.2 -1 GSC2.3 99.99 21.24 99.99
184.6925 -58.0651 19.0 -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
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=184.72710 (12:18:54.50) dec=-58.05463 (-58:03:16.7) +/- 0.6" mag=17.69+/-0.15 dist=8.6 REFID=8 flag=0
There are 41553.445 counts in the bkg source region of 6043.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 6.876 counts/pixel (5-sig UL in 4" is 19.42 mag) for 1185505_g18440
There are 1439.4340 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 7.197 counts/pixel for 1185505_g18440
There are 8202.6387 counts in the xrt_bkg source region of 1202.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 6.824 counts/pixel (5-sig UL in 4" is 19.42 mag) for 1185505_g18440
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 19.97, 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_713807836_230815d21h56m18s262123usUT_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(184.7134,-58.0520,45")
fk5;-circle(184.727100869463,-58.0546322852852,6")
fk5;-circle(184.73664092312,-58.0587595930471,6")
fk5;-circle(184.709750178939,-58.0535749473766,6")
fk5;-circle(184.695027393458,-58.0600316755961,6")
Region file: 1185505_713807836_230815d21h56m18s262123usUT_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_713807836_230815d21h56m18s262123usUT_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(184.709750178939,-58.0535749473766,6")
image paragraph message for exposure 2 of trigger 1185505
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: high density of stars, 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 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 96 seconds with the B filter starting
18664 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 coverage of the XRT error circle by the 8'x8' region for
the list of sources generated on-board is uncertain because the large number of
sources filled the available telemetry. 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 230815d21h56m36s709705usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1185505
-expid=713808092 -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 713808092.15876 or about 2023:227:16:01:27 UT
Found 3507 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 61% of the srclist region. Found 186 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 63 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 17.60 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 17.80 mag. Found 361 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 62% of the
Genie image region. The XRT position was OUTSIDE the star catalog search
region. The Genie image is INCOMPLETE with 22143 null pixels.
Found no Genie image background information. The number of srclist sources
filled the available telemetry. The weakest source detected was 19.37 mag.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 184.7276 dec= -58.0545 mag=19.18 sep=9.26".
The closest srclist source has ra= 184.7276 dec= -58.0545 mag=19.18 sep=9.26".
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 96 seconds with the B filter starting
18664 seconds after the BAT trigger. There is a candidate afterglow in the list
of sources generated on-board at
RA(J2000) = 12:18:54.63 = 184.72764
DEC(J2000) = -58:03:16.2 = -58.05451
with a 90%-confidence error radius of about 1.10 arc sec. This position is 9.26
arc sec. from the center of the XRT error circle. The estimated magnitude is
19.18 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?
713808092 18664 B srclist found no candidates.
713808092 18664 B 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.
713807836 18408 U srclist found no candidates.
713807836 18408 U 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 -------