image overlap message for exposure 1 of trigger 1281241
uvot_overlap.pl vrs. 2010-12-20b fem started at 250114d12h25m55s860456usUT
The observation of trigger 1281241 started 2025-01-14T07:36:11.0
Examining file ./1281241_g170_uvot_sky_image.fits
The exposure ID is 758532970
The exposure time is 149.846 (seconds)
The filter is WHITE.
The uvot region is centered at (166.5819,-15.1147) 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 1.760 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 6.67 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 0.378 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 1 of trigger 1281241
find_uvot_ag.pl vrs. 2023-04-25a fem started at 250114d12h26m01s644556usUT
Observation start time is 2025-01-14T07:36:11.0
Examining file ./1281241_g170_uvot_catalog_image.fits
The exposure ID is 758532970
The exposure is 149.846 sec.
The bin size is 2 pixels
The filter is WHITE
There are 6 detected source(s) for 1281241_g170
Aspect correction adds 0.00014 degrees (0.034 sec of time = 0.49 arc sec) to RA
Aspect correction adds -0.00051 degrees (-1.85 arcsec) to Dec
Total aspect correction is 1.91 arcsec
Star catalogs centered at 166.5777 , -15.1108 with radius 2.26 arc min.
n_usno: 31 n_gsc: 35
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 4 matched entries is 0.235" for 1281241_g170
Mean and std. dev of mag. difference (MAG_DELTA) are 0.496 and 0.564 for 1281241_g170
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 1281241_g170.
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)
*** WARNING 33 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1281241_g170 with genie
ra=166.57679 (11:06:18.43) dec=-15.11159 (-15:06:41.7) +/- 0.7" mag=20.35+/-0.20
dist=2.7 REFID=4 major=0.9 minor=0.8 flag=0
Found 1 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
166.5748 -15.1134 9.5 -1 GSC2.3 19.92 99.99 99.99
uvot_check_outside found 13 of 13 good pixels
##### This source remains a candidate #####
It has no entries within 3.5" or brighter than 12 mag
-----------------
Entry 5 in the list of sources is a candidate afterglow for 1281241_g170 with genie
ra=166.56177 (11:06:14.82) dec=-15.12289 (-15:07:22.4) +/- 0.7" mag=20.20+/-0.19
dist=63.6 REFID=1 major=2.1 minor=1.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 121.9 arc sec from the BAT position.
This source is near the edge of image (0.980)
Found 3 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
166.5570 -15.1222 16.8 -1 USNO-B1 20.58 20.30 20.42
166.5570 -15.1253 18.8 -1 USNO-B1 13.55 12.80 13.14
166.5570 -15.1253 18.6 -1 GSC2.3 12.83 13.47 99.99
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 2.1
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:
Unmatched source ra=166.57679 (11:06:18.43) dec=-15.11159 (-15:06:41.7) +/- 0.7" mag=20.35+/-0.20 dist=2.7 REFID=4 flag=0
There are 45696.871 counts in the bkg source region of 5970.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 7.654 counts/pixel (5-sig UL in 4" is 20.24 mag) for 1281241_g170
There are 490.87790 counts in the src source region of 50.000000 pixels.
Rate in src region with 4 arcsec radius is 9.818 counts/pixel for 1281241_g170
There are 9580.2070 counts in the cand_src_bkg source region of 1245.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 7.695 counts/pixel (5-sig UL in 4" is 20.24 mag) for 1281241_g170
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 20.80, XRT distances < 6",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
Region file: 1281241_758532970_250114d12h26m01s644556usUT_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(166.5819,-15.1147,45")
fk5;-circle(166.576792769329,-15.111591337979,6")
fk5;-circle(166.57376472272,-15.1222981746939,6")
fk5;-circle(166.586749632008,-15.1225369732752,6")
Region file: 1281241_758532970_250114d12h26m01s644556usUT_cand_src.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(166.576792769329,-15.111591337979,4")
Region file: 1281241_758532970_250114d12h26m01s644556usUT_cand_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(166.576792769329,-15.111591337979,25")
fk5;-circle(166.576792769329,-15.111591337979,15")
image paragraph message for exposure 1 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 150 seconds with the White filter
starting 136 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 11:06:18.43 = 166.57679
DEC(J2000) = -15:06:41.7 = -15.11159
with a 90%-confidence error radius of about 0.74 arc sec. This position is 2.7
arc sec. from the center of the XRT error circle. The estimated magnitude is
20.35 with a 1-sigma error of about 0.20. 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 250114d12h26m09s444625usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1281241
-expid=758532970 -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 758532970.97484 or about 2025:015:07:36:05 UT
Found 294 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 20 sources in
srclist catalog. Found 1 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 6 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
20.80 mag. Found 33 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 4% of the Genie image region. The
closest srclist source has ra= 166.5738 dec= -15.1224 mag=19.36 sep=38.54".
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?
758532970 135 WHITE srclist found no candidates.
758532970 135 WHITE 166.57679 -15.11159 20.35/20.8 2.7 image Yes
List afterglow candidates for other finding charts.
758533128 293 U srclist found no candidates.
758533128 293 U image found no candidates.
758533707 872 WHITE srclist found no candidates.
758533707 872 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -15.11159
GRB_ERROR: 0.74
GRB_RA: 166.57679
IMAGE_START_TIME: 07:36:05
MAGNITUDE: 20.35
MAG_ERROR: 0.20
MESSAGE_TYPE: ACK
SOURCE: XRT