image overlap message for exposure 1 of trigger 1400467
uvot_overlap.pl vrs. 2010-12-20b fem started at 251001d18h12m19s690309usUT
The observation of trigger 1400467 started 2025-10-01T14:19:55.8
Examining file ./1400467_g154_uvot_sky_image.fits
The exposure ID is 781021195
The exposure time is 149.857 (seconds)
The filter is WHITE.
*** Warning -- no aspect solution was applied to the image.
consequently the calculated overlaps are questionable.
The uvot region is centered at (42.6724,-23.0209) with a roll angle of 123.5
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 (42.6650,-23.0200) with a radius of 3.000 arc min
This is 0.415 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 7.17 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (42.6509,-23.0205) with a radius of 0.035 arc min
This is 1.192 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 1400467
find_uvot_ag.pl vrs. 2023-04-25a fem started at 251001d18h12m21s143377usUT
Observation start time is 2025-10-01T14:19:55.8
Examining file ./1400467_g154_uvot_sources_image.fits
The exposure ID is 781021195
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 8 detected source(s) for 1400467_g154
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 42.6778 , -23.0253 with radius 2.52 arc min.
n_usno: 81 n_gsc: 100
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 7.55098
RA DEC Mag Color
bright star 0: 42.70897 (02:50:50.15) -23.02755 (-23:01:39.2) 7.55 USNO-V
Found 8 entries without IDs and 6 entries that are acceptable afterglow candidates for 1400467_g154.
Acceptable entries have no ID, XRT distances < 5.25", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
2 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=42.6650 (02:50:39.60) DEC=-23.0200 (-23:01:12.0)
XRT distances are from RA=42.6509 (02:50:36.21) DEC=-23.0205 (-23:01:13.7)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 1 in the list of sources is a candidate afterglow for 1400467_g154 with genie
ra=42.68635 (02:50:44.72) dec=-23.03300 (-23:01:58.8) +/- 0.7" mag=15.31+/-0.14
dist=125.9 REFID=2 major=8.8 minor=6.8 flag=2 (blended)
*** The position of this source is inconsistent with the XRT position.
The position is 84.8 arc sec from the BAT position.
Found 4 entries in star catalog(s) within 20.0" of the candidate.
printing all entries
(Entries within 12 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
42.6866 -23.0316 5.3 -1 GSC2.3 99.99 21.89 99.99 *
42.6911 -23.0319 16.1 -1 GSC2.3 99.99 22.43 99.99
42.6915 -23.0335 17.1 -1 GSC2.3 99.99 22.03 99.99
42.6888 -23.0365 14.9 -1 GSC2.3 99.99 20.33 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 13.5" or brighter than 12 mag
-----------------
Entry 2 in the list of sources is a candidate afterglow for 1400467_g154 with genie
ra=42.69097 (02:50:45.83) dec=-23.03377 (-23:02:01.6) +/- 0.7" mag=17.12+/-0.14
dist=141.2 REFID=3 major=3.6 minor=3.5 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 99.3 arc sec from the BAT position.
This source is near the edge of image (0.878)
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
42.6866 -23.0316 16.5 -1 GSC2.3 99.99 21.89 99.99 *
42.6911 -23.0319 6.8 -1 GSC2.3 99.99 22.43 99.99 *
42.6915 -23.0335 2.1 -1 GSC2.3 99.99 22.03 99.99 *
42.6888 -23.0365 12.1 -1 GSC2.3 99.99 20.33 99.99 *
42.6960 -23.0308 19.8 -1 GSC2.3 19.72 99.99 99.99 *
42.6960 -23.0320 17.7 -1 GSC2.3 19.26 99.99 99.99 *
42.6964 -23.0329 18.2 -1 GSC2.3 20.32 99.99 99.99 *
42.6950 -23.0368 17.2 -1 GSC2.3 99.99 22.45 99.99 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 20.25" or brighter than 12 mag
-----------------
Entry 3 in the list of sources is a candidate afterglow for 1400467_g154 with genie
ra=42.67944 (02:50:43.07) dec=-23.01551 (-23:00:55.8) +/- 0.7" mag=17.70+/-0.14
dist=96.3 REFID=4 major=1.0 minor=1.0 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 50.5 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
42.6792 -23.0169 5.1 -1 USNO-B1 17.43 16.72 17.03 *
42.6810 -23.0105 18.7 -1 USNO-B1 20.00 18.57 19.20
42.6793 -23.0169 5.1 -1 GSC2.3 16.73 17.32 99.99 *
42.6815 -23.0148 7.3 -1 GSC2.3 99.99 22.40 99.99 *
42.6811 -23.0105 18.8 -1 GSC2.3 18.32 20.06 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 13.5" or brighter than 12 mag
-----------------
Entry 4 in the list of sources is a candidate afterglow for 1400467_g154 with genie
ra=42.68736 (02:50:44.97) dec=-23.03045 (-23:01:49.6) +/- 0.8" mag=18.27+/-0.15
dist=126.1 REFID=5 major=8.7 minor=7.6 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 83.1 arc sec from the BAT position.
Found 12 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
42.6842 -23.0272 15.7 -1 USNO-B1 19.08 19.41 19.26
42.6860 -23.0273 12.3 -1 USNO-B1 19.03 19.54 19.31 *
42.6877 -23.0257 17.1 -1 USNO-B1 19.02 19.04 19.03
42.6879 -23.0273 11.5 -1 USNO-B1 18.44 19.22 18.87 *
42.6894 -23.0270 14.1 -1 USNO-B1 19.33 19.46 19.40
42.6906 -23.0272 15.9 -1 USNO-B1 18.55 18.20 18.36
42.6922 -23.0272 19.8 -1 USNO-B1 18.26 19.36 18.87
42.6874 -23.0272 11.6 -1 GSC2.3 17.95 99.99 99.99 *
42.6866 -23.0316 4.7 -1 GSC2.3 99.99 21.89 99.99 *
42.6905 -23.0272 15.7 -1 GSC2.3 99.99 99.99 99.99
42.6911 -23.0319 13.3 -1 GSC2.3 99.99 22.43 99.99 *
42.6915 -23.0335 17.5 -1 GSC2.3 99.99 22.03 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 13.5" or brighter than 12 mag
-----------------
Entry 5 in the list of sources is a candidate afterglow for 1400467_g154 with genie
ra=42.65133 (02:50:36.32) dec=-23.01846 (-23:01:06.5) +/- 0.8" mag=18.95+/-0.15
dist=7.4 REFID=6 major=0.9 minor=0.7 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 45.6 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
-----------------
Entry 7 in the list of sources is a candidate afterglow for 1400467_g154 with genie
ra=42.66423 (02:50:39.41) dec=-23.03504 (-23:02:06.1) +/- 0.7" mag=16.70+/-0.14
dist=68.6 REFID=8 major=1.0 minor=0.9 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 54.2 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
42.6642 -23.0365 5.3 -1 USNO-B1 16.23 14.94 15.51 *
42.6645 -23.0383 11.6 -1 USNO-B1 20.17 19.27 19.67 *
42.6642 -23.0365 5.3 -1 GSC2.3 15.05 15.97 99.99 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 13.5" or brighter than 12 mag
Found 0 entries in star catalog(s) within 20" of the XRT position.
List UVOT sources within 20" of the XRT position:
Unmatched source ra=42.65133 (02:50:36.32) dec=-23.01846 (-23:01:06.5) +/- 0.8" mag=18.95+/-0.15 dist=7.4 REFID=6 flag=0
There are 51922.574 counts in the bkg source region of 6191.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 8.387 counts/pixel (5-sig UL in 4" is 20.19 mag) for 1400467_g154
There are 1720.7212 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 8.561 counts/pixel for 1400467_g154
XRT source is too far (71.3522323865243") from center -- do not compute local background.
There are 1 candidate(s) outside XRT error circle with mag < 20.19
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.75, XRT distances < 5.25",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Results are questionable because aspect solution FAILED.
Region file: 1400467_781021195_251001d18h12m21s143377usUT_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(42.6724,-23.0209,45")
fk5;-circle(42.6794397659556,-23.0155097105629,6")
Region file: 1400467_781021195_251001d18h12m21s143377usUT_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(42.65087,-23.02047,8")
image paragraph message for exposure 1 of trigger 1400467
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no aspect solution
SRCLIST PROBLEM: no srclist afterglow info
See notes for more details.
1 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB251001 (Swift/BAT trigger 1400467) at 14:17:20 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 118 seconds after the BAT trigger. No credible afterglow candidate has
been found in the initial data products. The 2.7'x2.7' sub-image processing
FAILED because of no aspect solution. Results from the list of sources
generated on-board are not available at this time. No correction has been made
for the expected extinction corresponding to E(B-V) of 0.023.
------- notes for trigger 1400467 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 251001d18h12m22s980767usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1400467
-expid=781021195 -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/1400467/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 781021195.7793 or about 2025:275:14:19:50 UT
No information found about the number of stars in the star catalog for srclist
region.
THERE IS NO ASPECT SOLUTION for the image data.
Found 8 source(s) in Genie image catalog. 1 source(s) are within 20.0" of the
xrt position. Found 8 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.75 mag. Found 100 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 10% of the Genie image region.
Found 1 Genie source(s) within 20.0" of the XRT position. The brightest such
source has ra= 42.6513 dec= -23.0185 mag=18.95 sep=7.38". The closest Genie
source has ra= 42.6513 dec= -23.0185 mag=18.95 sep=7.38".
This paragraph is only useful if the XRT position is grossly wrong. There are 1
candidate(s) in the image data with mag < 20.19 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=42.65133
(02:50:36.32), DEC=-23.01846 (-23:01:06.5) (J2000). It has a mag of 18.95. It
is 45.6" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 118 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 02:50:36.32 = 42.65133
DEC(J2000) = -23:01:06.5 = -23.01846
with a 90%-confidence error radius of about 0.76 arc sec. The estimated
magnitude is 18.95 with a 1-sigma error of about 0.15. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.023.
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 150 seconds with the White filter
starting 118 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 02:50:36.32 = 42.65133
DEC(J2000) = -23:01:06.5 = -23.01846
with a 90%-confidence error radius of about 0.76 arc sec. This position is 7.38
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.95 with a 1-sigma error of about 0.15. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.023.
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?
781021195 118 WHITE srclist data are not available.
781021195 118 WHITE image found no candidates.
List afterglow candidates for other finding charts.
781021937 860 WHITE srclist found no candidates.
781021937 860 WHITE image found no candidates.
------- Tokens for Quick GCN -------