image overlap message for exposure 2 of trigger 1278865
uvot_overlap.pl vrs. 2010-12-20b fem started at 250104d18h09m03s393881usUT
The observation of trigger 1278865 started 2025-01-03T15:50:06.4
Examining file ./1278865_g348_uvot_sky_image.fits
The exposure ID is 757612206
The exposure time is 249.890 (seconds)
The filter is U.
The uvot region is centered at (54.6466,-33.7771) with a roll angle of 227.4
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 (54.6510,-33.7720) with a radius of 3.000 arc min
This is 0.378 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 (54.6641,-33.7494) with a radius of 0.032 arc min
This is 1.877 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 0.000 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1278865
find_uvot_ag.pl vrs. 2023-04-25a fem started at 250104d18h09m14s092543usUT
Observation start time is 2025-01-03T15:50:06.4
Examining file ./1278865_g348_uvot_catalog_image.fits
The exposure ID is 757612206
The exposure is 249.890 sec.
The bin size is 2 pixels
The filter is U
There are 3 detected source(s) for 1278865_g348
Aspect correction adds -0.00057 degrees (-0.138 sec of time = -1.72 arc sec) to RA
Aspect correction adds -0.00055 degrees (-1.98 arcsec) to Dec
Total aspect correction is 2.62 arcsec
Star catalogs centered at 54.6466 , -33.7689 with radius 2.43 arc min.
n_usno: 53 n_gsc: 49
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 10.38852
RA DEC Mag Color
bright star 0: 54.65965 (03:38:38.32) -33.73078 (-33:43:50.8) 10.39 USNO-V
Mean distance difference (CAT_DELTA) for 2 matched entries is 0.535" for 1278865_g348
Mean and std. dev of mag. difference (MAG_DELTA) are 1.440 and 1.102 for 1278865_g348
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1278865_g348.
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=54.6510 (03:38:36.24) DEC=-33.7720 (-33:46:19.2)
XRT distances are from RA=54.6641 (03:38:39.39) DEC=-33.7494 (-33:44:58.0)
*** WARNING 33 per cent of entries have no IDs.
-----------------
Entry 1 in the list of sources is a candidate afterglow for 1278865_g348 with genie
ra=54.66040 (03:38:38.50) dec=-33.75497 (-33:45:17.9) +/- 1.1" mag=20.42+/-0.28
dist=22.8 REFID=2 major=1.0 minor=0.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 66.3 arc sec from the BAT position.
This source is near the edge of image (0.858)
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
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 8875.8477 counts in the bkg source region of 6315.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 1.406 counts/pixel (5-sig UL in 4" is 20.28 mag) for 1278865_g348
Do not compute counts in XRT region because position is too far from center.
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.83, 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: 1278865_757612206_250104d18h09m14s092543usUT_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(54.6466,-33.7771,45")
image paragraph message for exposure 2 of trigger 1278865
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB250103 (Swift/BAT trigger 1278865) at 15:44:17 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
313 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 expected extinction
corresponding to E(B-V) of 0.008.
------- notes for trigger 1278865 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 250104d18h09m17s899755usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1278865
-expid=757612206 -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/1278865/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
XRT position found for srclist. XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 757612206.41432 or about 2025:004:15:50:01 UT
Found 530 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 159 sources in
srclist catalog. Found 128 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 3 source(s) in Genie image catalog. 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 20.83 mag. Found 49 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 5% of the
Genie image region.
Genie image analysis:
Found 8875.8 counts in the large background region of 6315.0 pixels or a rate
of 1.406 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 20.08 mag. for a
4-arcsec aperture. The closest srclist source has ra= 54.6626 dec= -33.7349
mag=18.92 sep=52.67". The closest Genie source has ra= 54.6604 dec= -33.7550
mag=20.42 sep=22.80".
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?
757612206 313 U srclist found no candidates.
757612206 313 U image found no candidates.
List afterglow candidates for other finding charts.
757612048 155 WHITE 54.66375 -33.74934 19.78/19.2 1.2 srclist Yes
757612048 155 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: -33.74944
GRB_ERROR: 5
GRB_RA: 54.66412
IMAGE_START_TIME: 15:50:01
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT