image overlap message for exposure 2 of trigger 1209370
uvot_overlap.pl vrs. 2010-12-20b fem started at 240117d08h06m02s227549usUT
The observation of trigger 1209370 started 2024-01-17T07:53:24.0
Examining file 1209370_g292_uvot_sky_image.fits
The exposure ID is 727170804
The exposure time is 249.946 (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 (245.5771,-15.9090) with a roll angle of 104.1
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 (245.5490,-15.8770) with a radius of 3.000 arc min
This is 2.512 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 4.62 sq. arc min or 0.16 of the BAT error circle
The XRT error circle is centered at (245.5730,-15.9101) with a radius of 0.078 arc min
This is 0.245 arc min from the center of the uvot region
The area of the XRT error circle is 0.019 sq. arc min
The UVOT/XRT overlap is 0.019 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1209370
find_uvot_ag.pl vrs. 2023-04-25a fem started at 240117d08h06m03s366130usUT
Observation start time is 2024-01-17T07:53:24.0
Examining file 1209370_g292_uvot_sources_image.fits
The exposure ID is 727170804
The exposure is 249.946 sec.
The bin size is 2 pixels
The filter is U
There are 2 detected source(s) for 1209370_g292
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 245.5683 , -15.8923 with radius 2.00 arc min.
n_usno: 69 n_gsc: 75
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.81946
RA DEC Mag Color
bright star 0: 245.57727 (16:22:18.55) -15.87690 (-15:52:36.8) 11.82 USNO-V
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 1209370_g292.
Acceptable entries have no ID, XRT distances < 11.75", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=245.5490 (16:22:11.76) DEC=-15.8770 (-15:52:37.2)
XRT distances are from RA=245.5730 (16:22:17.52) DEC=-15.9101 (-15:54:36.4)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1209370_g292 with genie
ra=245.56924 (16:22:16.62) dec=-15.89319 (-15:53:35.5) +/- 0.9" mag=18.84+/-0.21
dist=62.2 REFID=1 major=1.3 minor=0.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 91.2 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
245.5684 -15.8896 13.2 -1 USNO-B1 20.94 19.46 20.12 *
245.5725 -15.8895 17.4 -1 USNO-B1 19.06 17.63 18.27
245.5684 -15.8896 13.2 -1 GSC2.3 19.51 21.00 99.99 *
245.5725 -15.8895 17.4 -1 GSC2.3 17.60 18.89 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 1 in the list of sources is a candidate afterglow for 1209370_g292 with genie
ra=245.56737 (16:22:16.17) dec=-15.89150 (-15:53:29.4) +/- 0.8" mag=17.74+/-0.16
dist=69.7 REFID=2 major=1.5 minor=1.3 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 82.3 arc sec from the BAT position.
Found 6 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
245.5684 -15.8896 7.7 -1 USNO-B1 20.94 19.46 20.12 *
245.5670 -15.8877 13.6 -1 USNO-B1 21.13 19.16 20.03
245.5725 -15.8895 19.2 -1 USNO-B1 19.06 17.63 18.27
245.5684 -15.8896 7.6 -1 GSC2.3 19.51 21.00 99.99 *
245.5669 -15.8878 13.4 -1 GSC2.3 18.95 21.14 99.99 *
245.5725 -15.8895 19.2 -1 GSC2.3 17.60 18.89 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 6 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
245.5768 -15.9068 17.8 -1 USNO-B1 19.89 17.36 18.48
245.5762 -15.9093 11.4 -1 USNO-B1 16.55 15.52 15.98
245.5737 -15.9137 13.1 -1 USNO-B1 20.60 19.16 19.80
245.5768 -15.9067 17.8 -1 GSC2.3 17.56 19.72 99.99
245.5762 -15.9093 11.3 -1 GSC2.3 15.38 16.37 99.99
245.5738 -15.9138 13.5 -1 GSC2.3 19.09 20.76 99.99
The closest star is 11.35" away.
List UVOT sources within 20" of the XRT position:
There are 69812.906 counts in the bkg source region of 6309.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 11.066 counts/pixel (5-sig UL in 4" is 19.16 mag) for 1209370_g292
There are 2084.8972 counts in the xrt source region of 197.00000 pixels.
Rate in xrt region with 8 arcsec radius is 10.583 counts/pixel for 1209370_g292
There are 13538.772 counts in the xrt_bkg source region of 1243.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 10.892 counts/pixel (5-sig UL in 4" is 19.17 mag) for 1209370_g292
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 19.71, XRT distances < 11.75",
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: 1209370_727170804_240117d08h06m03s366130usUT_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(245.5771,-15.9090,45")
Region file: 1209370_727170804_240117d08h06m03s366130usUT_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(245.5730,-15.9101,8")
Region file: 1209370_727170804_240117d08h06m03s366130usUT_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(245.5730,-15.9101,25")
fk5;-circle(245.5730,-15.9101,15")
image paragraph message for exposure 2 of trigger 1209370
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.
------ Start for Possible Stand-alone Circular ----
In response to GRB240117 (Swift/BAT trigger 1209370) at 07:48:31 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
260 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 0.401.
------- notes for trigger 1209370 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 240117d08h06m05s997375usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1209370
-expid=727170804 -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/1209370/
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 727170804.0416 or about 2024:017:07:53:19 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 2 source(s) in Genie image catalog. Found 2 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 19.71 mag. Found 72 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 12% of the
Genie image region. The closest Genie source has ra= 245.5692 dec= -15.8932
mag=18.84 sep=62.24".
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?
727170804 260 U srclist data are not available.
727170804 260 U image found no candidates.
List afterglow candidates for other finding charts.
727170646 102 ? srclist data are not available.
727170646 102 WHITE image found no candidates.
------- Tokens for Quick GCN -------