srclist overlap message for exposure 1 of trigger 1442056
uvot_overlap.pl vrs. 2010-12-20b fem started at 260118d11h40m02s938755usUT
The observation of trigger 1442056 started 2026-01-18T11:31:41.0
Examining file 1442056_g225_uvot_sky_srclist.fits
The exposure ID is 790428700
The exposure time is undefined.
The filter is U.
The uvot region is centered at (170.2502,-61.9260) with a roll angle of 134.4
It is square with sides of 17.13 arc min. for an area of 293.61 sq arc min
The BAT error circle is centered at (170.2300,-61.9090) with a radius of 3.000 arc min
This is 1.167 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 (170.2386,-61.9161) with a radius of 0.085 arc min
This is 0.677 arc min from the center of the uvot region
The area of the XRT error circle is 0.023 sq. arc min
The UVOT/XRT overlap is 0.023 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 1 of trigger 1442056
find_uvot_ag.pl vrs. 2023-04-25a fem started at 260118d11h40m05s857055usUT
Observation start time is 2026-01-18T11:31:41.0
Examining file 1442056_g225_uvot_catalog_srclist.fits
The exposure ID is 790428700
The exposure is 250.000 sec.
The bin size is 2 pixels
The filter is U
There are 190 detected source(s) for 1442056_g225
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 0.547
srclist_overlap returned: xrt_overlap 1.000
Dimmest detected source in 1442056_g225 has mag 18.52
Aspect correction adds 0.00056 degrees (0.135 sec of time = 0.96 arc sec) to RA
Aspect correction adds -0.00031 degrees (-1.12 arcsec) to Dec
Total aspect correction is 1.47 arcsec
Star catalogs centered at 170.2984 , -61.9105 with radius 7.66 arc min.
n_usno: 3320 n_gsc: 4589
*** WARNING -- bright star catalog has 30 entries brighter than 12 mag
The brightest has mag 8.22
RA DEC Mag Color
bright star 0: 170.30284 (11:21:12.68) -61.92093 (-61:55:15.4) 11.11 USNO-V
bright star 1: 170.23847 (11:20:57.23) -61.91621 (-61:54:58.3) 11.85 USNO-V
bright star 2: 170.19354 (11:20:46.45) -61.95970 (-61:57:34.9) 11.88 USNO-V
bright star 3: 170.44346 (11:21:46.43) -61.93583 (-61:56:09.0) 11.37 USNO-V
bright star 4: 170.13721 (11:20:32.93) -61.92166 (-61:55:18.0) 11.70 USNO-V
bright star 5: 170.42660 (11:21:42.38) -61.96172 (-61:57:42.2) 11.05 USNO-V
bright star 6: 170.18508 (11:20:44.42) -61.97381 (-61:58:25.7) 10.35 USNO-V
bright star 7: 170.32134 (11:21:17.12) -61.82640 (-61:49:35.1) 11.79 USNO-V
bright star 8: 170.44958 (11:21:47.90) -61.95998 (-61:57:35.9) 11.49 USNO-V
bright star 9: 170.11621 (11:20:27.89) -61.87689 (-61:52:36.8) 9.81 USNO-V
bright star 10: 170.46600 (11:21:51.84) -61.96013 (-61:57:36.5) 11.24 USNO-V
bright star 11: 170.16478 (11:20:39.55) -61.98206 (-61:58:55.4) 10.81 USNO-V
bright star 12: 170.15963 (11:20:38.31) -61.98588 (-61:59:09.2) 8.95 USNO-V
bright star 13: 170.15934 (11:20:38.24) -61.98756 (-61:59:15.2) 11.40 USNO-V
bright star 14: 170.15642 (11:20:37.54) -61.98761 (-61:59:15.4) 9.55 USNO-V
bright star 15: 170.16136 (11:20:38.73) -61.83078 (-61:49:50.8) 11.03 USNO-R
bright star 16: 170.51735 (11:22:04.16) -61.92836 (-61:55:42.1) 10.67 USNO-V
bright star 17: 170.23529 (11:20:56.47) -62.01040 (-62:00:37.4) 11.39 GSC-V
bright star 18: 170.52673 (11:22:06.42) -61.92407 (-61:55:26.6) 11.30 USNO-V
bright star 19: 170.07997 (11:20:19.19) -61.94581 (-61:56:44.9) 9.54 USNO-V
bright star 20: 170.23007 (11:20:55.22) -62.01569 (-62:00:56.5) 11.53 USNO-V
bright star 21: 170.52467 (11:22:05.92) -61.94620 (-61:56:46.3) 11.85 USNO-V
bright star 22: 170.54276 (11:22:10.26) -61.91027 (-61:54:37.0) 11.07 USNO-V
bright star 23: 170.42500 (11:21:42.00) -62.00925 (-62:00:33.3) 11.58 USNO-V
bright star 24: 170.48095 (11:21:55.43) -61.83131 (-61:49:52.7) 10.93 USNO-V
bright star 25: 170.04884 (11:20:11.72) -61.87153 (-61:52:17.5) 8.22 USNO-R
bright star 26: 170.54118 (11:22:09.88) -61.95998 (-61:57:35.9) 10.73 USNO-B
bright star 27: 170.16055 (11:20:38.53) -61.98492 (-61:59:05.7) 11.90 GSC-V
bright star 28: 170.44794 (11:21:47.50) -61.99522 (-61:59:42.8) 11.87 GSC-V
bright star 29: 170.36041 (11:21:26.50) -61.78644 (-61:47:11.2) 11.76 GSC-V
Mean distance difference (CAT_DELTA) for 156 matched entries is 0.907" for 1442056_g225
Mean and std. dev of mag. difference (MAG_DELTA) are 2.283 and 0.726 for 1442056_g225
Found 37 entries without IDs and 6 entries that are acceptable afterglow candidates for 1442056_g225.
Acceptable entries have no ID, XRT distances < 12.75", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
20 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=170.2300 (11:20:55.20) DEC=-61.9090 (-61:54:32.4)
XRT distances are from RA=170.2386 (11:20:57.26) DEC=-61.9161 (-61:54:58.0)
-----------------
Entry 13 in the list of sources is a candidate afterglow for 1442056_g225 with 3x3 stamp
ra=170.22251 (11:20:53.40) dec=-61.90585 (-61:54:21.1) +/- 1.1" mag=15.79+/-0.35
dist=45.9 REFID=60
*** The position of this source is inconsistent with the XRT position.
The position is 17.0 arc sec from the BAT position.
src: 13 srclist_match has ID
src: 13 distr. of nearby unmatched sources: 0 0 0 0 0
Found 10 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
170.2325 -61.9085 19.4 -1 USNO-B1 18.87 17.34 18.02
170.2230 -61.9064 2.1 -1 USNO-B1 13.36 12.77 13.03 *
170.2230 -61.9056 1.3 -1 USNO-B1 99.99 15.90 99.99 *
170.2226 -61.9006 19.0 -1 USNO-B1 99.99 18.62 99.99
170.2145 -61.9034 16.2 -1 USNO-B1 16.82 16.24 16.50
170.2320 -61.9085 18.7 -1 GSC2.3 99.99 99.99 99.99
170.2242 -61.9044 5.9 -1 GSC2.3 99.99 99.99 99.99
170.2227 -61.9065 2.2 -1 GSC2.3 12.58 99.99 12.79 *
170.2242 -61.9006 19.3 -1 GSC2.3 99.99 99.99 99.99
170.2142 -61.9033 16.8 -1 GSC2.3 16.70 99.99 17.03
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 37 in the list of sources is a candidate afterglow for 1442056_g225 with 3x3 stamp
ra=170.23941 (11:20:57.46) dec=-61.87538 (-61:52:31.4) +/- 1.1" mag=17.15+/-0.35
dist=146.6 REFID=75
*** The position of this source is inconsistent with the XRT position.
The position is 122.1 arc sec from the BAT position.
src: 37 srclist_match has ID
src: 37 distr. of nearby unmatched sources: 0 0 0 0 0
Found 8 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
170.2365 -61.8789 13.5 -1 USNO-B1 18.71 18.38 18.53
170.2354 -61.8768 8.5 -1 USNO-B1 17.21 16.79 16.98
170.2386 -61.8748 2.4 -1 USNO-B1 99.99 13.91 99.99 *
170.2389 -61.8729 8.9 -1 USNO-B1 16.10 14.18 15.03
170.2388 -61.8754 1.0 -1 GSC2.3 15.21 99.99 15.61 *
170.2349 -61.8767 9.1 -1 GSC2.3 17.18 99.99 99.99
170.2367 -61.8741 6.4 -1 GSC2.3 16.32 99.99 16.76
170.2389 -61.8726 10.1 -1 GSC2.3 14.81 99.99 15.44
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 38 in the list of sources is a candidate afterglow for 1442056_g225 with 1x1 stamp
ra=170.28291 (11:21:07.90) dec=-61.88036 (-61:52:49.3) +/- 1.1" mag=17.96+/-0.35
dist=149.0 REFID=139
*** The position of this source is inconsistent with the XRT position.
The position is 136.7 arc sec from the BAT position.
src: 38 srclist_match has ID
src: 38 distr. of nearby unmatched sources: 0 0 0 0 0
Found 8 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
170.2788 -61.8830 11.9 -1 USNO-B1 17.34 16.87 17.08
170.2885 -61.8814 10.2 -1 USNO-B1 18.73 17.89 18.27
170.2846 -61.8799 3.3 -1 USNO-B1 14.89 13.34 14.03 *
170.2798 -61.8779 10.4 -1 USNO-B1 17.43 16.95 17.17
170.2786 -61.8831 12.1 -1 GSC2.3 99.99 99.99 99.99
170.2828 -61.8805 0.6 -1 GSC2.3 15.26 99.99 16.05 *
170.2853 -61.8795 5.1 -1 GSC2.3 14.66 99.99 15.14
170.2792 -61.8776 11.8 -1 GSC2.3 17.40 99.99 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
-----------------
Entry 39 in the list of sources is a candidate afterglow for 1442056_g225 with 3x3 stamp
ra=170.22476 (11:20:53.94) dec=-61.87414 (-61:52:26.9) +/- 1.1" mag=16.87+/-0.35
dist=152.9 REFID=66
*** The position of this source is inconsistent with the XRT position.
The position is 125.8 arc sec from the BAT position.
src: 39 srclist_match has ID
src: 39 distr. of nearby unmatched sources: 0 0 0 0 0
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
170.2212 -61.8765 10.5 -1 USNO-B1 17.67 15.98 16.73
170.2239 -61.8746 2.2 -1 USNO-B1 14.57 13.30 13.87 *
170.2349 -61.8767 19.6 -1 GSC2.3 17.18 99.99 99.99
170.2219 -61.8756 7.2 -1 GSC2.3 15.45 99.99 15.96
170.2245 -61.8742 0.5 -1 GSC2.3 14.23 99.99 14.76 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 40 in the list of sources is a candidate afterglow for 1442056_g225 with 3x3 stamp
ra=170.28570 (11:21:08.57) dec=-61.87940 (-61:52:45.9) +/- 1.1" mag=17.15+/-0.35
dist=154.4 REFID=82
*** The position of this source is inconsistent with the XRT position.
The position is 142.4 arc sec from the BAT position.
src: 40 srclist_match has ID
src: 40 distr. of nearby unmatched sources: 0 0 0 0 0
Found 8 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
170.2788 -61.8830 17.5 -1 USNO-B1 17.34 16.87 17.08
170.2885 -61.8814 8.6 -1 USNO-B1 18.73 17.89 18.27
170.2846 -61.8799 2.6 -1 USNO-B1 14.89 13.34 14.03 *
170.2798 -61.8779 11.4 -1 USNO-B1 17.43 16.95 17.17
170.2786 -61.8831 17.8 -1 GSC2.3 99.99 99.99 99.99
170.2828 -61.8805 6.4 -1 GSC2.3 15.26 99.99 16.05
170.2853 -61.8795 0.7 -1 GSC2.3 14.66 99.99 15.14 *
170.2792 -61.8776 12.8 -1 GSC2.3 17.40 99.99 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
-----------------
Entry 46 in the list of sources is a candidate afterglow for 1442056_g225 with 3x3 stamp
ra=170.25645 (11:21:01.55) dec=-61.96218 (-61:57:43.8) +/- 1.1" mag=16.36+/-0.35
dist=168.6 REFID=46
*** The position of this source is inconsistent with the XRT position.
The position is 196.6 arc sec from the BAT position.
src: 46 srclist_match has ID
src: 46 distr. of nearby unmatched sources: 0 0 0 0 0
Found 11 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
170.2503 -61.9577 19.1 -1 USNO-B1 99.99 18.17 99.99
170.2639 -61.9617 12.7 -1 USNO-B1 18.28 17.35 17.76
170.2516 -61.9604 10.4 -1 USNO-B1 17.62 17.37 17.48
170.2581 -61.9628 3.5 -1 USNO-B1 14.55 13.52 13.97 *
170.2584 -61.9629 4.2 -1 USNO-B1 14.67 13.33 13.92
170.2639 -61.9639 14.1 -1 USNO-B1 15.20 14.43 14.77
170.2524 -61.9662 16.0 -1 USNO-B1 17.89 16.79 17.28
170.2514 -61.9603 10.8 -1 GSC2.3 99.99 99.99 99.99
170.2573 -61.9625 1.9 -1 GSC2.3 13.84 99.99 14.24 *
170.2635 -61.9640 13.5 -1 GSC2.3 15.06 99.99 15.44
170.2520 -61.9662 16.3 -1 GSC2.3 99.99 99.99 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 2 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
170.2385 -61.9162 0.4 -1 USNO-B1 12.61 11.24 11.85
170.2382 -61.9167 2.3 -1 GSC2.3 11.26 99.99 12.06
The closest star is 0.44" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=170.23856 (11:20:57.25) dec=-61.91660 (-61:54:59.8) +/- 1.1" mag=13.39+/-0.35 dist=1.8 REFID=43
Matched source ra=170.23747 (11:20:56.99) dec=-61.91632 (-61:54:58.8) +/- 1.1" mag=15.54+/-0.35 dist=2.1 REFID=134
Matched source ra=170.23803 (11:20:57.13) dec=-61.91667 (-61:55:00.0) +/- 1.1" mag=12.61+/-0.35 dist=2.3 REFID=31
Unmatched source ra=170.23917 (11:20:57.40) dec=-61.91683 (-61:55:00.6) +/- 1.1" mag=15.74+/-0.35 dist=2.8 REFID=77
Unmatched source ra=170.23755 (11:20:57.01) dec=-61.91660 (-61:54:59.7) +/- 1.1" mag=15.08+/-0.35 dist=2.5 REFID=85
Unmatched source ra=170.23769 (11:20:57.05) dec=-61.91672 (-61:55:00.2) +/- 1.1" mag=13.85+/-0.35 dist=2.7 REFID=32
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 18.12, XRT distances < 12.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: /Home/eud/uvot_tdrss/swift/uvot_gcn/src_1442056_XRT.reg
# Region file format: DS9 version 3.0
# find_uvot_ag.pl vrs. 2023-04-25a fem XRT
global font="helvetica 12 bold" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source=1
fk5;circle(170.2386,-61.9161,5.1") # color=red dash=0
point(170.23916,-61.91641) # point=diamond 10 color=red width=2
srclist paragraph message for exposure 1 of trigger 1442056
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no image afterglow info
SRCLIST PROBLEM: srclist filled telemetry buffer
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB260118 (Swift/BAT trigger 1442056) at 11:27:54 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
188 seconds after the BAT trigger. No credible afterglow candidate has been
found in the initial data products. Data from the 2.7'x2.7' sub-image are not
available at this time. 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 large, but
uncertain, extinction expected.
------- notes for trigger 1442056 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 260118d11h40m11s754104usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1442056
-expid=790428700 -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/1442056/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for bat position. Unreliable extinction found for
xrt position. XRT position found for srclist. BAT position found.
UVOT exposure began at MET 790428700.98796 or about 0000:11706:11:31:44 UT
Found 3316 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 39% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 37 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.12 mag.
The number of srclist sources filled the available telemetry. The weakest
source detected was 18.52 mag.
Found 6 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 170.2386 dec= -61.9166 mag=13.39 sep=1.80".
The closest srclist source has ra= 170.2386 dec= -61.9166 mag=13.39 sep=1.80".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 250 seconds with the U filter starting
188 seconds after the BAT trigger. There is a candidate afterglow in the list
of sources generated on-board at
RA(J2000) = 11:20:57.25 = 170.23856
DEC(J2000) = -61:54:59.8 = -61.91660
with a 90%-confidence error radius of about 1.10 arc sec. This position is 1.80
arc sec. from the center of the XRT error circle. The estimated magnitude is
13.39 with a 1-sigma error of about 0.35. No correction has been made for the
large, but uncertain, extinction expected.
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?
790428700 188 U srclist found no candidates.
790428700 188 ? image data are not available.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------