image overlap message for exposure 2 of trigger 1281241
uvot_overlap.pl vrs. 2010-12-20b fem started at 250114d12h25m57s678544usUT
The observation of trigger 1281241 started 2025-01-14T07:38:49.0
Examining file ./1281241_g328_uvot_sky_image.fits
The exposure ID is 758533128
The exposure time is 250.034 (seconds)
The filter is U.
The uvot region is centered at (166.5827,-15.1143) with a roll angle of 125.2
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 (166.5900,-15.1430) with a radius of 3.000 arc min
This is 1.772 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 6.64 sq. arc min or 0.24 of the BAT error circle
The XRT error circle is centered at (166.5761,-15.1119) with a radius of 0.040 arc min
This is 0.410 arc min from the center of the uvot region
The area of the XRT error circle is 0.005 sq. arc min
The UVOT/XRT overlap is 0.005 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1281241
find_uvot_ag.pl vrs. 2023-04-25a fem started at 250114d12h26m16s884172usUT
Observation start time is 2025-01-14T07:38:49.0
Examining file ./1281241_g328_uvot_catalog_image.fits
The exposure ID is 758533128
The exposure is 250.034 sec.
The bin size is 2 pixels
The filter is U
There are 1 detected source(s) for 1281241_g328
Aspect correction adds 0.00011 degrees (0.027 sec of time = 0.39 arc sec) to RA
Aspect correction adds -0.00062 degrees (-2.22 arcsec) to Dec
Total aspect correction is 2.25 arcsec
Star catalogs centered at 166.5724 , -15.1197 with radius 2.00 arc min.
n_usno: 33 n_gsc: 33
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 1 matched entries is 0.131" for 1281241_g328
Mean and std. dev of mag. difference (MAG_DELTA) are 0.106 and 0.000 for 1281241_g328
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1281241_g328.
Acceptable entries have no ID, XRT distances < 6", 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=166.5900 (11:06:21.60) DEC=-15.1430 (-15:08:34.8)
XRT distances are from RA=166.5761 (11:06:18.26) DEC=-15.1119 (-15:06:42.8)
Found 1 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
166.5748 -15.1134 7.1 -1 GSC2.3 19.92 99.99 99.99
The closest star is 7.05" away.
List UVOT sources within 10" of the XRT position:
There are 13298.767 counts in the bkg source region of 6221.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 2.138 counts/pixel (5-sig UL in 4" is 20.05 mag) for 1281241_g328
There are 434.45547 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 2.172 counts/pixel for 1281241_g328
There are 2734.6646 counts in the xrt_bkg source region of 1248.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 2.191 counts/pixel (5-sig UL in 4" is 20.04 mag) for 1281241_g328
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 20.61, XRT distances < 6",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1281241_758533128_250114d12h26m16s884172usUT_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(166.5827,-15.1143,45")
fk5;-circle(166.573738329895,-15.1223099413603,6")
Region file: 1281241_758533128_250114d12h26m16s884172usUT_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(166.57608,-15.11189,8")
Region file: 1281241_758533128_250114d12h26m16s884172usUT_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(166.57608,-15.11189,25")
fk5;-circle(166.57608,-15.11189,15")
image paragraph message for exposure 2 of trigger 1281241
------ Start for Possible Stand-alone Circular ----
In response to GRB250114 (Swift/BAT trigger 1281241) at 07:33:19 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
294 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 19.2 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 18.0 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.056.
------- notes for trigger 1281241 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 250114d12h26m23s916267usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1281241
-expid=758533128 -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/1281241/
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 758533128.96626 or about 2025:015:07:38:43 UT
Found 232 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 17 sources in
srclist catalog. Found 3 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 1 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 20.61 mag. Found 31 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 13298.8 counts in the large background region of 6221.0 pixels or a rate
of 2.138 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 19.85 mag. for a
4-arcsec aperture.
Found 434.5 counts in the XRT position region of 200.0 pixels or a rate of
2.172 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.015 +/- 0.090 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.270 cps or 19.56 mag. The closest srclist
source has ra= 166.5566 dec= -15.1245 mag=17.94 sep=81.63". The closest Genie
source has ra= 166.5737 dec= -15.1223 mag=18.82 sep=38.38".
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?
758533128 293 U srclist found no candidates.
758533128 293 U image found no candidates.
List afterglow candidates for other finding charts.
758532970 135 WHITE srclist found no candidates.
758532970 135 WHITE 166.57679 -15.11159 20.35/20.8 2.7 image Yes
758533707 872 WHITE srclist found no candidates.
758533707 872 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -15.11189
GRB_ERROR: 6
GRB_RA: 166.57608
IMAGE_START_TIME: 07:38:43
MAGNITUDE: 19.6
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT