image overlap message for exposure 1 of trigger 1280056
uvot_overlap.pl vrs. 2010-12-20b fem started at 250108d12h49m41s195900usUT
The observation of trigger 1280056 started 2025-01-08T10:25:38.1
Examining file ./1280056_g151_uvot_sky_image.fits
The exposure ID is 758024738
The exposure time is 149.857 (seconds)
The filter is WHITE.
*** Warning -- found 24174 null pixels in the image.
The uvot region is centered at (201.3351,25.6136) with a roll angle of 110.7
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 (201.2970,25.6130) with a radius of 3.000 arc min
This is 2.064 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 at most 3.82 sq. arc min or 0.14 of the BAT error circle
The XRT error circle is centered at (201.3265,25.6152) with a radius of 0.037 arc min
This is 0.475 arc min from the center of the uvot region
The area of the XRT error circle is 0.004 sq. arc min
The UVOT/XRT overlap is 0.00 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1280056
find_uvot_ag.pl vrs. 2023-04-25a fem started at 250108d12h49m44s892518usUT
Observation start time is 2025-01-08T10:25:38.1
Examining file ./1280056_g151_uvot_catalog_image.fits
The exposure ID is 758024738
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 1 detected source(s) for 1280056_g151
Aspect correction adds 0.00094 degrees (0.226 sec of time = 3.05 arc sec) to RA
Aspect correction adds -0.00137 degrees (-4.93 arcsec) to Dec
Total aspect correction is 5.80 arcsec
Star catalogs centered at 201.3396 , 25.6407 with radius 2.00 arc min.
n_usno: 33 n_gsc: 28
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 0 matched entries is 0.000" for 1280056_g151
Mean and std. dev of mag. difference (MAG_DELTA) are 0.000 and -1.000 for 1280056_g151
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1280056_g151.
Acceptable entries have no ID, XRT distances < 5.5", 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=201.2970 (13:25:11.28) DEC=25.6130 (+25:36:46.8)
XRT distances are from RA=201.3265 (13:25:18.37) DEC=25.6152 (+25:36:54.7)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1280056_g151 with genie
ra=201.33963 (13:25:21.51) dec=25.64069 (+25:38:26.5) +/- 0.9" mag=20.49+/-0.20
dist=101.1 REFID=1 major=1.5 minor=1.2 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 170.5 arc sec from the BAT position.
This source is near the edge of image (0.899)
Found 3 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
201.3397 25.6406 0.4 -1 USNO-B1 20.63 19.77 20.15 *
201.3398 25.6407 0.6 -1 GSC2.3 19.47 20.96 99.99 *
201.3373 25.6410 7.7 -1 GSC2.3 99.99 22.41 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 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 0.0000000 counts in the bkg source region of 0.0000000 pixels.
There are 0.0000000 counts in the xrt source region of 0.0000000 pixels.
There are 0.0000000 counts in the xrt_bkg source region of 0.0000000 pixels.
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 19.42, XRT distances < 5.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1280056_758024738_250108d12h49m44s892518usUT_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(201.3351,25.6136,45")
Region file: 1280056_758024738_250108d12h49m44s892518usUT_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(201.32654,25.61519,8")
Region file: 1280056_758024738_250108d12h49m44s892518usUT_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(201.32654,25.61519,25")
fk5;-circle(201.32654,25.61519,15")
image paragraph message for exposure 1 of trigger 1280056
IMAGE PROBLEM: incomplete image, no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB250108 (Swift/BAT trigger 1280056) at 10:23:06 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 117 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 mag. No correction has been made for the expected
extinction corresponding to E(B-V) of 0.012.
------- notes for trigger 1280056 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 250108d12h49m49s029367usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1280056
-expid=758024738 -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/1280056/
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 758024738.06098 or about 2025:009:10:25:33 UT
Found 325 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 20 sources in
srclist catalog. Found 2 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
Found 1 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 19.42 mag. Found 29 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 5% of the
Genie image region. The Genie image is INCOMPLETE with 24174 null pixels.
Found no Genie image background information. The closest srclist source has ra=
201.3145 dec= 25.6194 mag=17.14 sep=42.04". The closest Genie source has ra=
201.3396 dec= 25.6407 mag=20.49 sep=101.14".
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?
758024738 116 WHITE srclist found no candidates.
758024738 116 WHITE image found no candidates.
List afterglow candidates for other finding charts.
758024895 273 U srclist found no candidates.
758024895 273 U image found no candidates.
758025499 877 WHITE srclist found no candidates.
758025499 877 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 25.61519
GRB_ERROR: 5.5
GRB_RA: 201.32654
IMAGE_START_TIME: 10:25:33
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT