image overlap message for exposure 1 of trigger 1429020
uvot_overlap.pl vrs. 2010-12-20b fem started at 251230d08h04m44s337259usUT
The observation of trigger 1429020 started 2025-12-30T01:23:34.4
Examining file ./1429020_g112_uvot_sky_image.fits
The exposure ID is 788750614
The exposure time is 149.846 (seconds)
The filter is WHITE.
The uvot region is centered at (179.9045,11.4359) with a roll angle of 111.4
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 (179.8940,11.4150) with a radius of 3.000 arc min
This is 1.396 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 7.11 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (179.8974,11.4383) with a radius of 0.037 arc min
This is 0.445 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 1 of trigger 1429020
find_uvot_ag.pl vrs. 2023-04-25a fem started at 251230d08h04m47s950547usUT
Observation start time is 2025-12-30T01:23:34.4
Examining file ./1429020_g112_uvot_catalog_image.fits
The exposure ID is 788750614
The exposure is 149.846 sec.
The bin size is 2 pixels
The filter is WHITE
There are 8 detected source(s) for 1429020_g112
Aspect correction adds 0.00113 degrees (0.271 sec of time = 3.98 arc sec) to RA
Aspect correction adds -0.00074 degrees (-2.67 arcsec) to Dec
Total aspect correction is 4.79 arcsec
Star catalogs centered at 179.8968 , 11.4363 with radius 2.58 arc min.
n_usno: 29 n_gsc: 24
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 2 matched entries is 0.185" for 1429020_g112
Mean and std. dev of mag. difference (MAG_DELTA) are 0.967 and 0.041 for 1429020_g112
Found 6 entries without IDs and 6 entries that are acceptable afterglow candidates for 1429020_g112.
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=179.8940 (11:59:34.56) DEC=11.4150 (+11:24:54.0)
XRT distances are from RA=179.8974 (11:59:35.37) DEC=11.4383 (+11:26:17.9)
*** WARNING 75 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1429020_g112 with genie
ra=179.89760 (11:59:35.42) dec=11.43870 (+11:26:19.3) +/- 0.7" mag=13.74+/-0.14
dist=1.6 REFID=5 major=1.0 minor=0.7 flag=0
Found 4 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
179.9011 11.4415 15.9 -1 USNO-B1 20.86 20.15 20.46
179.8977 11.4429 15.2 -1 USNO-B1 20.38 20.00 20.17
179.8979 11.4428 14.7 -1 GSC2.3 20.25 21.15 99.99
179.9013 11.4416 16.8 -1 GSC2.3 20.01 20.84 99.99
uvot_check_outside found 11 of 11 good pixels
##### This source remains a candidate #####
It has no entries within 3.5" or brighter than 12 mag
-----------------
Entry 1 in the list of sources is a candidate afterglow for 1429020_g112 with genie
ra=179.89311 (11:59:34.35) dec=11.43903 (+11:26:20.5) +/- 0.8" mag=18.63+/-0.15
dist=15.2 REFID=6 major=3.7 minor=2.4 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 86.6 arc sec from the BAT position.
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 3.7
-----------------
Entry 2 in the list of sources is a candidate afterglow for 1429020_g112 with genie
ra=179.89542 (11:59:34.90) dec=11.44263 (+11:26:33.5) +/- 0.8" mag=19.23+/-0.16
dist=17.0 REFID=3 major=4.4 minor=3.2 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 99.6 arc sec from the BAT position.
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
179.8977 11.4429 8.2 -1 USNO-B1 20.38 20.00 20.17
179.8996 11.4456 18.2 -1 USNO-B1 21.05 99.99 99.99
179.8979 11.4428 8.7 -1 GSC2.3 20.25 21.15 99.99
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 4.4
-----------------
Entry 3 in the list of sources is a candidate afterglow for 1429020_g112 with genie
ra=179.89626 (11:59:35.10) dec=11.43496 (+11:26:05.9) +/- 0.8" mag=18.46+/-0.15
dist=12.7 REFID=8 major=5.7 minor=1.2 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 72.3 arc sec from the BAT position.
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 5.7
-----------------
Entry 4 in the list of sources is a candidate afterglow for 1429020_g112 with genie
ra=179.89829 (11:59:35.59) dec=11.44302 (+11:26:34.9) +/- 0.8" mag=19.36+/-0.16
dist=17.3 REFID=2 major=3.4 minor=2.9 flag=2 (blended)
*** The position of this source is inconsistent with the XRT position.
The position is 102.0 arc sec from the BAT position.
Found 5 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
179.9011 11.4415 11.4 -1 USNO-B1 20.86 20.15 20.46
179.8977 11.4429 2.0 -1 USNO-B1 20.38 20.00 20.17 *
179.8996 11.4456 10.3 -1 USNO-B1 21.05 99.99 99.99
179.8979 11.4428 1.7 -1 GSC2.3 20.25 21.15 99.99 *
179.9013 11.4416 11.9 -1 GSC2.3 20.01 20.84 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 5 in the list of sources is a candidate afterglow for 1429020_g112 with genie
ra=179.90192 (11:59:36.46) dec=11.43835 (+11:26:18.1) +/- 0.8" mag=19.64+/-0.17
dist=16.1 REFID=7 major=2.3 minor=1.9 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 88.6 arc sec from the BAT position.
Found 2 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
179.9011 11.4415 11.6 -1 USNO-B1 20.86 20.15 20.46
179.9013 11.4416 11.8 -1 GSC2.3 20.01 20.84 99.99
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 2.3
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=179.89760 (11:59:35.42) dec=11.43870 (+11:26:19.3) +/- 0.7" mag=13.74+/-0.14 dist=1.6 REFID=5 flag=0
There are 61422.672 counts in the bkg source region of 5654.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 10.864 counts/pixel (5-sig UL in 4" is 20.05 mag) for 1429020_g112
There are 13082.339 counts in the src source region of 49.000000 pixels.
Rate in src region with 4 arcsec radius is 266.987 counts/pixel for 1429020_g112
There are 11720.432 counts in the cand_src_bkg source region of 913.00000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 12.837 counts/pixel (5-sig UL in 4" is 19.96 mag) for 1429020_g112
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 < 5.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
Region file: 1429020_788750614_251230d08h04m47s950547usUT_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(179.9045,11.4359,45")
fk5;-circle(179.897596451689,11.4386966273312,6")
fk5;-circle(179.893111947531,11.4390327320508,6")
fk5;-circle(179.89542184176,11.4426315012714,6")
fk5;-circle(179.896260479997,11.4349611877546,6")
fk5;-circle(179.898288051637,11.4430227174308,6")
fk5;-circle(179.901919377427,11.4383533569211,6")
Region file: 1429020_788750614_251230d08h04m47s950547usUT_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(179.897596451689,11.4386966273312,4")
Region file: 1429020_788750614_251230d08h04m47s950547usUT_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(179.897596451689,11.4386966273312,25")
fk5;-circle(179.897596451689,11.4386966273312,15")
fk5;-circle(179.893111947531,11.4390327320508,6")
fk5;-circle(179.89542184176,11.4426315012714,6")
fk5;-circle(179.896260479997,11.4349611877546,6")
fk5;-circle(179.898288051637,11.4430227174308,6")
fk5;-circle(179.901919377427,11.4383533569211,6")
image paragraph message for exposure 1 of trigger 1429020
------ Start for Possible Stand-alone Circular ----
In response to GRB251230 (Swift/BAT trigger 1429020) at 01:21:41 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 76 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 11:59:35.42 = 179.89760
DEC(J2000) = +11:26:19.3 = 11.43870
with a 90%-confidence error radius of about 0.74 arc sec. This position is 1.6
arc sec. from the center of the XRT error circle. The estimated magnitude is
13.74 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.024.
------- notes for trigger 1429020 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 251230d08h04m54s435554usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1429020
-expid=788750614 -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/1429020/
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 788750614.35652 or about 2025:365:01:23:29 UT
Found 216 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 3% of the srclist region. Found 17 sources in
srclist catalog. Found 1 srclist source(s) without IDs. There are 1 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
Found 8 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 6 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.61 mag. Found 25 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 2% of the Genie image region.
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?
788750614 75 WHITE 179.89780 11.43891 15.17/19.2 2.6 srclist Yes
788750614 75 WHITE 179.89760 11.43870 13.74/20.6 1.6 image Yes
List afterglow candidates for other finding charts.
788750826 287 U 179.89752 11.43848 14.18/18.1 1.0 srclist Yes
788750826 287 U 179.89739 11.43848 13.71/20.4 1.3 image Yes
788751405 866 WHITE 179.89737 11.43856 15.96/19.2 1.6 srclist Yes
788751405 866 WHITE 179.89740 11.43854 15.62/20.4 1.4 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 11.43870
GRB_ERROR: 0.74
GRB_RA: 179.89760
IMAGE_START_TIME: 01:23:29
MAGNITUDE: 13.74
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT