image overlap message for exposure 2 of trigger 1320335
uvot_overlap.pl vrs. 2010-12-20b fem started at 250603d06h09m36s476038usUT
The observation of trigger 1320335 started 2025-06-03T01:16:16.4
Examining file ./1320335_g352_uvot_sky_image.fits
The exposure ID is 770606176
The exposure time is 249.924 (seconds)
The filter is U.
The uvot region is centered at (129.9114,-39.2657) with a roll angle of 307.2
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 (129.9180,-39.2680) with a radius of 3.000 arc min
This is 0.338 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 (129.9375,-39.2929) with a radius of 0.038 arc min
This is 2.031 arc min from the center of the uvot region
The area of the XRT error circle is 0.005 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 2 of trigger 1320335
find_uvot_ag.pl vrs. 2023-04-25a fem started at 250603d06h09m50s316180usUT
Observation start time is 2025-06-03T01:16:16.4
Examining file ./1320335_g352_uvot_catalog_image.fits
The exposure ID is 770606176
The exposure is 249.924 sec.
The bin size is 2 pixels
The filter is U
There are 6 detected source(s) for 1320335_g352
Aspect correction adds -0.00030 degrees (-0.072 sec of time = -0.83 arc sec) to RA
Aspect correction adds 0.00063 degrees ( 2.27 arcsec) to Dec
Total aspect correction is 2.42 arcsec
Star catalogs centered at 129.9155 , -39.2656 with radius 2.40 arc min.
n_usno: 182 n_gsc: 198
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 6 matched entries is 0.625" for 1320335_g352
Mean and std. dev of mag. difference (MAG_DELTA) are 2.430 and 0.496 for 1320335_g352
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1320335_g352.
Acceptable entries have no ID, XRT distances < 5.75", 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=129.9180 (08:39:40.32) DEC=-39.2680 (-39:16:04.8)
XRT distances are from RA=129.9375 (08:39:44.99) DEC=-39.2929 (-39:17:34.3)
Found 2 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
129.9410 -39.2927 9.8 -1 USNO-B1 19.97 20.25 20.13
129.9408 -39.2927 9.3 -1 GSC2.3 19.71 21.82 99.99
The closest star is 9.35" away.
List UVOT sources within 10" of the XRT position:
There are 29432.143 counts in the bkg source region of 6306.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 4.667 counts/pixel (5-sig UL in 4" is 19.63 mag) for 1320335_g352
Do not compute counts in XRT region because position is too far from center.
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 20.18, XRT distances < 5.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1320335_770606176_250603d06h09m50s316180usUT_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(129.9114,-39.2657,45")
image paragraph message for exposure 2 of trigger 1320335
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 GRB250603 (Swift/BAT trigger 1320335) at 01:10:23 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
317 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 100% of the XRT error circle. The list of sources is typically complete
to about 18.0 mag. No correction has been made for the large, but uncertain,
extinction expected.
------- notes for trigger 1320335 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 250603d06h09m53s950351usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1320335
-expid=770606176 -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/1320335/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Large extinction of 5.423 found for bat position. 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 770606176.41004 or about 2025:155:01:16:11 UT
Found 1790 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 19% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 122 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 6 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 20.18 mag. Found 186 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 22% of the
Genie image region.
Genie image analysis:
Found 29432.1 counts in the large background region of 6306.0 pixels or a rate
of 4.667 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 19.42 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 18.51 mag. The closest srclist
source has ra= 129.9485 dec= -39.2909 mag=18.18 sep=31.45". The closest Genie
source has ra= 129.9303 dec= -39.2821 mag=17.13 sep=43.68".
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?
770606176 317 U srclist found no candidates.
770606176 317 U image found no candidates.
List afterglow candidates for other finding charts.
770605963 104 WHITE srclist found no candidates.
770605963 104 WHITE image found no candidates.
770606731 872 WHITE srclist found no candidates.
770606731 872 WHITE image found no candidates.
------- Tokens for Quick GCN -------