srclist overlap message for exposure 3 of trigger 1280056
uvot_overlap.pl vrs. 2010-12-20b fem started at 250108d12h49m40s609473usUT
The observation of trigger 1280056 started 2025-01-08T10:38:19.2
Examining file ./1280056_g912_uvot_sky_srclist.fits
The exposure ID is 758025499
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (201.3343,25.6117) with a roll angle of 110.7
It is square with sides of 12.05 arc min. for an area of 145.15 sq arc min
The BAT error circle is centered at (201.2970,25.6130) with a radius of 3.000 arc min
This is 2.020 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 28.27 sq. arc min or 1.00 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 0.468 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
srclist afterglow message for exposure 3 of trigger 1280056
find_uvot_ag.pl vrs. 2023-04-25a fem started at 250108d12h50m00s947929usUT
Observation start time is 2025-01-08T10:38:19.2
Examining file ./1280056_g912_uvot_catalog_srclist.fits
The exposure ID is 758025499
The exposure is 101.557 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 1280056_g912
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 1.000
srclist_overlap returned: xrt_overlap 1.000
Dimmest detected source in 1280056_g912 has mag 19.96
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 201.3070 , 25.5986 with radius 8.70 arc min.
n_usno: 648 n_gsc: 818
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 8.77984
RA DEC Mag Color
bright star 0: 201.35164 (13:25:24.39) 25.54857 (+25:32:54.8) 8.78 USNO-V
bright star 1: 201.41404 (13:25:39.37) 25.68218 (+25:40:55.9) 9.15 USNO-V
Mean distance difference (CAT_DELTA) for 51 matched entries is 0.988" for 1280056_g912
Mean and std. dev of mag. difference (MAG_DELTA) are 1.494 and 1.505 for 1280056_g912
Found 142 entries without IDs and 1 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.
137 sources matched bright stars.
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 74 per cent of entries have no IDs.
-----------------
Entry 3 in the list of sources is a candidate afterglow for 1280056_g912 with 1x1 stamp
ra=201.28591 (13:25:08.62) dec=25.61999 (+25:37:12.0) +/- 1.1" mag=19.69+/-0.35
dist=133.0 REFID=171
*** The position of this source is inconsistent with the XRT position.
The position is 43.9 arc sec from the BAT position.
src: 3 srclist_match has ID
src: 3 distr. of nearby unmatched sources: 0 0 0 0 0
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
201.2843 25.6166 13.4 -1 USNO-B1 20.73 19.83 20.23
201.2839 25.6166 13.9 -1 GSC2.3 20.48 21.64 99.99
201.2856 25.6197 1.3 -1 GSC2.3 99.99 21.49 99.99 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 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 no candidates inside BAT error circle, but outside XRT error circle.
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.01, XRT distances < 5.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
srclist 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 250108d12h50m06s995784usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1280056
-expid=758025499 -meonly -msg_srclist
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