image overlap message for exposure 3 of trigger 1280056
uvot_overlap.pl vrs. 2010-12-20b fem started at 250108d12h49m42s778465usUT
The observation of trigger 1280056 started 2025-01-08T10:38:19.2
Examining file ./1280056_g912_uvot_sky_image.fits
The exposure ID is 758025499
The exposure time is 101.557 (seconds)
The filter is WHITE.
The uvot region is centered at (201.3349,25.6130) 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 2.052 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 6.15 sq. arc min or 0.22 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 0.472 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 0.004 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 3 of trigger 1280056
find_uvot_ag.pl vrs. 2023-04-25a fem started at 250108d12h50m03s067098usUT
Observation start time is 2025-01-08T10:38:19.2
Examining file ./1280056_g912_uvot_catalog_image.fits
The exposure ID is 758025499
The exposure is 101.557 sec.
The bin size is 2 pixels
The filter is WHITE
There are 3 detected source(s) for 1280056_g912
Aspect correction adds 0.00136 degrees (0.327 sec of time = 4.42 arc sec) to RA
Aspect correction adds -0.00109 degrees (-3.91 arcsec) to Dec
Total aspect correction is 5.90 arcsec
Star catalogs centered at 201.3197 , 25.6034 with radius 2.16 arc min.
n_usno: 35 n_gsc: 35
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 3 matched entries is 0.346" for 1280056_g912
Mean and std. dev of mag. difference (MAG_DELTA) are 0.420 and 0.383 for 1280056_g912
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1280056_g912.
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)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 36009.805 counts in the bkg source region of 6309.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 5.708 counts/pixel (5-sig UL in 4" is 19.98 mag) for 1280056_g912
There are 1168.6047 counts in the xrt source region of 199.00000 pixels.
Rate in xrt region with 8 arcsec radius is 5.872 counts/pixel for 1280056_g912
There are 7285.5498 counts in the xrt_bkg source region of 1243.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 5.861 counts/pixel (5-sig UL in 4" is 19.97 mag) for 1280056_g912
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 20.54, 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_758025499_250108d12h50m03s067098usUT_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(201.3349,25.6130,45")
Region file: 1280056_758025499_250108d12h50m03s067098usUT_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_758025499_250108d12h50m03s067098usUT_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 3 of trigger 1280056
SRCLIST PROBLEM: srclist filled telemetry buffer
------ 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 102 seconds with the White filter
starting 878 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. The typical 3-sigma upper limit has been about 19.6 mag.
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 250108d12h50m09s775405usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1280056
-expid=758025499 -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 758025499.22204 or about 2025:009:10:38:14 UT
Found 818 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 142 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 19.01 mag.
Found 3 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 20.54 mag. Found 35 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 36009.8 counts in the large background region of 6309.0 pixels or a rate
of 5.708 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 19.81 mag. for a
4-arcsec aperture.
Found 1168.6 counts in the XRT position region of 199.0 pixels or a rate of
5.872 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.022 +/- 0.361 (1-sigma) cps or
23.76 mag and a range from 20.65 to 99.99 mag. The 3-sigma UL at the XRT
position is 1.105 cps or 19.50 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 19.96 mag. The closest
srclist source has ra= 201.3145 dec= 25.6193 mag=17.62 sep=41.67". The closest
Genie source has ra= 201.3143 dec= 25.6194 mag=16.56 sep=42.31".
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?
758025499 877 WHITE srclist found no candidates.
758025499 877 WHITE image found no candidates.
List afterglow candidates for other finding charts.
758024738 116 WHITE srclist found no candidates.
758024738 116 WHITE image found no candidates.
758024895 273 U srclist found no candidates.
758024895 273 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 25.61519
GRB_ERROR: 5.5
GRB_RA: 201.32654
IMAGE_START_TIME: 10:38:14
MAGNITUDE: 19.5
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT