srclist overlap message for exposure 2 of trigger 1402466
uvot_overlap.pl vrs. 2010-12-20b fem started at 251008d08h06m59s930080usUT
The observation of trigger 1402466 started 2025-10-07T19:42:25.4
Examining file ./1402466_g326_uvot_sky_srclist.fits
The exposure ID is 781558945
The exposure time is undefined.
The filter is U.
The uvot region is centered at (128.1844,21.8135) with a roll angle of 105.3
It is square with sides of 8.03 arc min. for an area of 64.51 sq arc min
The BAT error circle is centered at (128.1730,21.8230) with a radius of 3.000 arc min
This is 0.855 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 (128.1765,21.8130) with a radius of 0.033 arc min
This is 0.441 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 0.003 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 2 of trigger 1402466
find_uvot_ag.pl vrs. 2023-04-25a fem started at 251008d08h07m13s173422usUT
Observation start time is 2025-10-07T19:42:25.4
Examining file ./1402466_g326_uvot_catalog_srclist.fits
The exposure ID is 781558945
The exposure is 126.640 sec.
The bin size is 2 pixels
The filter is U
There are 22 detected source(s) for 1402466_g326
Aspect correction adds 0.00269 degrees (0.646 sec of time = 8.99 arc sec) to RA
Aspect correction adds 0.00132 degrees ( 4.75 arcsec) to Dec
Total aspect correction is 10.17 arcsec
Star catalogs centered at 128.1842 , 21.8182 with radius 5.16 arc min.
n_usno: 237 n_gsc: 215
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.44756
RA DEC Mag Color
bright star 0: 128.21444 (08:32:51.47) 21.82194 (+21:49:19.0) 11.45 USNO-V
Mean distance difference (CAT_DELTA) for 18 matched entries is 0.616" for 1402466_g326
Mean and std. dev of mag. difference (MAG_DELTA) are 2.385 and 0.440 for 1402466_g326
Found 4 entries without IDs and 1 entries that are acceptable afterglow candidates for 1402466_g326.
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.
3 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=128.1730 (08:32:41.52) DEC=21.8230 (+21:49:22.8)
XRT distances are from RA=128.1765 (08:32:42.36) DEC=21.8130 (+21:48:46.7)
-----------------
Entry 8 in the list of sources is a candidate afterglow for 1402466_g326 with 5x5 stamp
ra=128.18265 (08:32:43.84) dec=21.77500 (+21:46:30.0) +/- 1.1" mag=18.38+/-0.35
dist=138.2 REFID=15
*** The position of this source is inconsistent with the XRT position.
The position is 175.8 arc sec from the BAT position.
src: 8 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
128.1832 21.7744 2.7 -1 USNO-B1 14.60 13.35 13.91 *
128.1827 21.7779 10.4 -1 GSC2.3 20.26 99.99 99.99
128.1832 21.7744 2.9 -1 GSC2.3 13.61 14.32 13.86 *
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 17.75, XRT distances < 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 2 of trigger 1402466
------ Start for Possible Stand-alone Circular ----
In response to GRB251007 (Swift/BAT trigger 1402466) at 19:36:58 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 127 seconds with the U filter starting
290 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 08:32:42.39 = 128.17662
DEC(J2000) = +21:48:45.8 = 21.81272
with a 90%-confidence error radius of about 0.90 arc sec. This position is 1.0
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.86 with a 1-sigma error of about 0.22. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.039.
------- notes for trigger 1402466 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 251008d08h07m15s674465usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1402466
-expid=781558945 -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/1402466/
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 781558945.39948 or about 2025:281:19:42:20 UT
Found 233 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 22 sources in
srclist catalog. Found 4 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
17.75 mag.
Found 7 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 2 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
19.70 mag. Found 62 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 6% of the Genie image region. The
closest srclist source has ra= 128.1854 dec= 21.7945 mag=15.66 sep=72.66".
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?
781558945 290 U srclist found no candidates.
781558945 290 U 128.17662 21.81272 18.86/19.7 1.0 image Yes
List afterglow candidates for other finding charts.
781558733 78 WHITE 128.17677 21.81294 18.73/19.2 0.9 srclist Yes
781558733 78 WHITE 128.17665 21.81280 18.38/20.3 0.8 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 21.81272
GRB_ERROR: 0.90
GRB_RA: 128.17662
IMAGE_START_TIME: 19:42:20
MAGNITUDE: 18.86
MAG_ERROR: 0.22
MESSAGE_TYPE: ACK
SOURCE: XRT