image overlap message for exposure 1 of trigger 1220156
uvot_overlap.pl vrs. 2010-12-20b fem started at 240315d09h45m09s292213usUT
The observation of trigger 1220156 started 2024-03-15T09:26:54.5
Examining file 1220156_g135_uvot_sky_image.fits
The exposure ID is 732187614
The exposure time is 149.868 (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 (244.2352,-15.6791) with a roll angle of 97.9
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 (244.3110,-15.6820) with a radius of 3.000 arc min
This is 4.380 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 0.23 sq. arc min or 0.01 of the BAT error circle
The XRT error circle is centered at (244.2317,-15.6784) with a radius of 0.078 arc min
This is 0.208 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 1 of trigger 1220156
find_uvot_ag.pl vrs. 2023-04-25a fem started at 240315d09h45m11s026498usUT
Observation start time is 2024-03-15T09:26:54.5
Examining file 1220156_g135_uvot_sources_image.fits
The exposure ID is 732187614
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 6 detected source(s) for 1220156_g135
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 244.2435 , -15.6846 with radius 2.06 arc min.
n_usno: 91 n_gsc: 88
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 10.04134
RA DEC Mag Color
bright star 0: 244.22082 (16:16:53.00) -15.67142 (-15:40:17.1) 10.04 USNO-V
Found 6 entries without IDs and 1 entries that are acceptable afterglow candidates for 1220156_g135.
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=244.3110 (16:17:14.64) DEC=-15.6820 (-15:40:55.2)
XRT distances are from RA=244.2317 (16:16:55.61) DEC=-15.6784 (-15:40:42.2)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 1 in the list of sources is a candidate afterglow for 1220156_g135 with genie
ra=244.25892 (16:17:02.14) dec=-15.67523 (-15:40:30.8) +/- 0.8" mag=19.14+/-0.16
dist=95.0 REFID=2 major=3.5 minor=3.2 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 182.1 arc sec from the BAT position.
Found 8 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
244.2546 -15.6738 15.8 -1 USNO-B1 20.74 19.27 19.93
244.2583 -15.6701 18.6 -1 USNO-B1 99.99 19.09 99.99
244.2604 -15.6721 12.3 -1 USNO-B1 19.80 18.86 19.27 *
244.2632 -15.6724 18.1 -1 USNO-B1 20.54 18.93 19.64
244.2545 -15.6738 16.1 -1 GSC2.3 19.22 20.61 99.99
244.2581 -15.6701 18.7 -1 GSC2.3 18.88 20.97 99.99
244.2604 -15.6721 12.2 -1 GSC2.3 18.76 19.88 99.99 *
244.2631 -15.6724 17.8 -1 GSC2.3 18.73 20.37 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 5 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
244.2326 -15.6765 7.4 -1 USNO-B1 18.60 99.99 99.99
244.2314 -15.6750 12.2 -1 USNO-B1 15.91 13.74 14.71
244.2305 -15.6828 16.3 -1 GSC2.3 19.74 99.99 99.99
244.2322 -15.6763 7.9 -1 GSC2.3 99.99 99.99 99.99
244.2313 -15.6752 11.6 -1 GSC2.3 13.66 15.32 99.99
The closest star is 7.43" away.
List UVOT sources within 20" of the XRT position:
There are 63451.023 counts in the bkg source region of 6305.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 10.064 counts/pixel (5-sig UL in 4" is 20.10 mag) for 1220156_g135
There are 1342.4039 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 6.679 counts/pixel for 1220156_g135
There are 9788.9902 counts in the xrt_bkg source region of 1250.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 7.831 counts/pixel (5-sig UL in 4" is 20.23 mag) for 1220156_g135
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 20.65, 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: 1220156_732187614_240315d09h45m11s026498usUT_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(244.2352,-15.6791,45")
fk5;-circle(244.231434155135,-15.6926471957135,6")
fk5;-circle(244.235732963046,-15.6932290947339,6")
Region file: 1220156_732187614_240315d09h45m11s026498usUT_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(244.23171,-15.67839,8")
Region file: 1220156_732187614_240315d09h45m11s026498usUT_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(244.23171,-15.67839,25")
fk5;-circle(244.23171,-15.67839,15")
image paragraph message for exposure 1 of trigger 1220156
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 GRB240315 (Swift/BAT trigger 1220156) at 09:24:38 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 102 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 0.267.
------- notes for trigger 1220156 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 240315d09h45m12s799436usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1220156
-expid=732187614 -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/1220156/
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.
*** Warning -- BAT and XRT error circles do NOT overlap.
UVOT exposure began at MET 732187614.45048 or about 2024:075:09:26:49 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 6 source(s) in Genie image catalog. Found 6 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.65 mag. Found 87 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 14% of the
Genie image region. The closest Genie source has ra= 244.2314 dec= -15.6927
mag=18.71 sep=51.33".
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?
732187614 102 WHITE srclist data are not available.
732187614 102 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------