image overlap message for exposure 2 of trigger 1329888
uvot_overlap.pl vrs. 2010-12-20b fem started at 250703d00h09m36s399714usUT
The observation of trigger 1329888 started 2025-07-02T21:12:28.5
Examining file ./1329888_g344_uvot_sky_image.fits
The exposure ID is 773183548
The exposure time is 205.432 (seconds)
The filter is U.
*** Warning -- no aspect solution was applied to the image.
consequently the calculated overlaps are questionable.
The uvot region is centered at (212.9327,16.7482) with a roll angle of 298.5
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 (212.9330,16.6990) with a radius of 3.000 arc min
This is 2.953 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 3.25 sq. arc min or 0.11 of the BAT error circle
The XRT error circle is centered at (212.9358,16.7491) with a radius of 0.037 arc min
This is 0.189 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 2 of trigger 1329888
find_uvot_ag.pl vrs. 2023-04-25a fem started at 250703d00h09m45s584420usUT
Observation start time is 2025-07-02T21:12:28.5
Examining file ./1329888_g344_uvot_sources_image.fits
The exposure ID is 773183548
The exposure is 205.432 sec.
The bin size is 2 pixels
The filter is U
There are 3 detected source(s) for 1329888_g344
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 212.9296 , 16.7536 with radius 2.02 arc min.
n_usno: 29 n_gsc: 23
Bright star catalog has no entries brighter than 12 mag
Found 3 entries without IDs and 2 entries that are acceptable afterglow candidates for 1329888_g344.
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=212.9330 (14:11:43.92) DEC=16.6990 (+16:41:56.4)
XRT distances are from RA=212.9358 (14:11:44.60) DEC=16.7491 (+16:44:56.7)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1329888_g344 with genie
ra=212.92174 (14:11:41.22) dec=16.73828 (+16:44:17.8) +/- 0.8" mag=18.61+/-0.17
dist=62.2 REFID=1 major=1.2 minor=1.1 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 146.6 arc sec from the BAT position.
Found 6 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
212.9205 16.7394 5.9 -1 USNO-B1 18.54 18.56 18.55 *
212.9197 16.7333 19.2 -1 USNO-B1 21.09 19.13 20.00
212.9192 16.7334 19.5 -1 USNO-B1 21.00 18.91 19.84
212.9204 16.7392 5.7 -1 GSC2.3 18.23 18.80 18.55 *
212.9265 16.7363 17.9 -1 GSC2.3 20.49 99.99 99.99
212.9194 16.7333 19.7 -1 GSC2.3 18.87 21.25 19.25
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 1329888_g344 with genie
ra=212.93743 (14:11:44.98) dec=16.74750 (+16:44:51.0) +/- 0.7" mag=15.02+/-0.14
dist=7.9 REFID=3 major=1.0 minor=1.0 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 175.3 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
212.9413 16.7494 15.0 -1 USNO-B1 20.25 19.05 19.59
212.9412 16.7493 14.6 -1 GSC2.3 18.86 20.60 19.08
*** If XRT position is correct, then this is NOT the afterglow
Found 2 entries in star catalog(s) within 20" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
212.9413 16.7494 18.9 -1 USNO-B1 20.25 19.05 19.59
212.9412 16.7493 18.7 -1 GSC2.3 18.86 20.60 19.08
The closest star is 18.66" away.
List UVOT sources within 20" of the XRT position:
Unmatched source ra=212.93743 (14:11:44.98) dec=16.74750 (+16:44:51.0) +/- 0.7" mag=15.02+/-0.14 dist=7.9 REFID=3 flag=0
There are 9958.4561 counts in the bkg source region of 6193.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 1.608 counts/pixel (5-sig UL in 4" is 19.99 mag) for 1329888_g344
There are 1960.6265 counts in the xrt source region of 199.00000 pixels.
Rate in xrt region with 8 arcsec radius is 9.852 counts/pixel for 1329888_g344
There are 2130.8679 counts in the xrt_bkg source region of 1243.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 1.714 counts/pixel (5-sig UL in 4" is 19.96 mag) for 1329888_g344
There are 1 candidate(s) outside XRT error circle with mag < 19.99
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.55, XRT distances < 5.5",
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: 1329888_773183548_250703d00h09m45s584420usUT_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(212.9327,16.7482,45")
fk5;-circle(212.937434324959,16.7475010369754,6")
Region file: 1329888_773183548_250703d00h09m45s584420usUT_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(212.93583,16.74908,8")
Region file: 1329888_773183548_250703d00h09m45s584420usUT_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(212.93583,16.74908,25")
fk5;-circle(212.93583,16.74908,15")
image paragraph message for exposure 2 of trigger 1329888
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 GRB250702 (Swift/BAT trigger 1329888) at 21:06:43 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 205 seconds with the U filter starting
309 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 0.017.
------- notes for trigger 1329888 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 250703d00h09m49s346541usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1329888
-expid=773183548 -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/1329888/
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 773183548.47904 or about 2025:184:21:12:23 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 3 source(s) in Genie image catalog. 1 source(s) are within 20.0" of the
xrt position. Found 3 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.55 mag. Found 25 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 4% of the Genie image region.
Found 1 Genie source(s) within 20.0" of the XRT position. The brightest such
source has ra= 212.9374 dec= 16.7475 mag=15.02 sep=7.93". The closest Genie
source has ra= 212.9374 dec= 16.7475 mag=15.02 sep=7.93".
This paragraph is only useful if the XRT position is grossly wrong. There are 1
candidate(s) in the image data with mag < 19.99 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=212.93743
(14:11:44.98), DEC=16.74750 (+16:44:51.0) (J2000). It has a mag of 15.02. It is
175.3" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 205 seconds with the U filter starting
309 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 14:11:44.98 = 212.93743
DEC(J2000) = +16:44:51.0 = 16.74750
with a 90%-confidence error radius of about 0.75 arc sec. The estimated
magnitude is 15.02 with a 1-sigma error of about 0.14. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.017.
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 205 seconds with the U filter starting
309 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 14:11:44.98 = 212.93743
DEC(J2000) = +16:44:51.0 = 16.74750
with a 90%-confidence error radius of about 0.75 arc sec. This position is 7.93
arc sec. from the center of the XRT error circle. The estimated magnitude is
15.02 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.017.
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?
773183548 308 U srclist data are not available.
773183548 308 U image found no candidates.
List afterglow candidates for other finding charts.
773183336 96 WHITE 212.93617 16.74852 16.33/19.2 2.3 srclist Yes
773183336 96 WHITE 212.93622 16.74861 15.85/20.8 2.2 image Yes
------- Tokens for Quick GCN -------