image overlap message for exposure 1 of trigger 1220155
uvot_overlap.pl vrs. 2010-12-20b fem started at 240315d09h42m58s832784usUT
The observation of trigger 1220155 started 2024-03-15T09:23:22.3
Examining file 1220155_g331_uvot_sky_image.fits
The exposure ID is 732187402
The exposure time is 181.498 (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 (244.6604,-15.7407) with a roll angle of 97.8
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 (244.7360,-15.7720) with a radius of 3.000 arc min
This is 4.751 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 0.00 sq. arc min or 0.00 of the BAT error circle
The XRT error circle is centered at (244.6558,-15.7397) with a radius of 0.078 arc min
This is 0.275 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 1220155
find_uvot_ag.pl vrs. 2023-04-25a fem started at 240315d09h42m59s965894usUT
Observation start time is 2024-03-15T09:23:22.3
Examining file 1220155_g331_uvot_sources_image.fits
The exposure ID is 732187402
The exposure is 181.498 sec.
The bin size is 2 pixels
The filter is U
There are 6 detected source(s) for 1220155_g331
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 244.6663 , -15.7414 with radius 2.27 arc min.
n_usno: 99 n_gsc: 101
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.22006
RA DEC Mag Color
bright star 0: 244.65531 (16:18:37.27) -15.75472 (-15:45:17.0) 11.22 USNO-V
Found 6 entries without IDs and 1 entries that are acceptable afterglow candidates for 1220155_g331.
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=244.7360 (16:18:56.64) DEC=-15.7720 (-15:46:19.2)
XRT distances are from RA=244.6558 (16:18:37.39) DEC=-15.7397 (-15:44:22.9)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 5 in the list of sources is a candidate afterglow for 1220155_g331 with genie
ra=244.68759 (16:18:45.02) dec=-15.73927 (-15:44:21.4) +/- 0.8" mag=18.81+/-0.19
dist=110.2 REFID=6 major=1.2 minor=0.9 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 205.0 arc sec from the BAT position.
This source is near the edge of image (0.914)
Found 0 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)
*** If XRT position is correct, then this is NOT the afterglow
Found 8 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
244.6586 -15.7395 9.9 -1 USNO-B1 18.46 17.23 17.78
244.6591 -15.7361 17.4 -1 USNO-B1 20.79 19.64 20.15
244.6569 -15.7407 5.2 -1 USNO-B1 20.55 19.54 19.99
244.6572 -15.7347 18.5 -1 USNO-B1 20.56 19.56 20.01
244.6586 -15.7395 9.7 -1 GSC2.3 17.21 18.40 99.99
244.6592 -15.7360 17.7 -1 GSC2.3 19.85 21.03 99.99
244.6568 -15.7408 5.2 -1 GSC2.3 19.50 20.63 99.99
244.6572 -15.7348 18.2 -1 GSC2.3 19.32 20.89 99.99
The closest star is 5.19" away.
List UVOT sources within 20" of the XRT position:
Unmatched source ra=244.65920 (16:18:38.21) dec=-15.73731 (-15:44:14.3) +/- 0.9" mag=19.06+/-0.21 dist=14.6 REFID=3 flag=0
There are 19360.854 counts in the bkg source region of 5971.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 3.242 counts/pixel (5-sig UL in 4" is 19.48 mag) for 1220155_g331
There are 598.30640 counts in the xrt source region of 197.00000 pixels.
Rate in xrt region with 8 arcsec radius is 3.037 counts/pixel for 1220155_g331
There are 3874.7683 counts in the xrt_bkg source region of 1139.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 3.402 counts/pixel (5-sig UL in 4" is 19.45 mag) for 1220155_g331
There are 1 candidate(s) outside XRT error circle with mag < 19.47
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.03, 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: 1220155_732187402_240315d09h42m59s965894usUT_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(244.6604,-15.7407,45")
fk5;-circle(244.667611938589,-15.74661425853,6")
fk5;-circle(244.659201446944,-15.7373083117266,6")
fk5;-circle(244.662884817592,-15.7375332484872,6")
Region file: 1220155_732187402_240315d09h42m59s965894usUT_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(244.65579,-15.73969,8")
Region file: 1220155_732187402_240315d09h42m59s965894usUT_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(244.65579,-15.73969,25")
fk5;-circle(244.65579,-15.73969,15")
fk5;-circle(244.659201446944,-15.7373083117266,6")
fk5;-circle(244.662884817592,-15.7375332484872,6")
image paragraph message for exposure 1 of trigger 1220155
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 GRB240315 (Swift/BAT trigger 1220155) at 09:17:50 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 182 seconds with the U filter starting
298 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 0.243.
------- notes for trigger 1220155 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 240315d09h43m03s339732usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1220155
-expid=732187402 -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/1220155/
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 732187402.2764 or about 2024:075:09:23:17 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. 1 source(s) are within 20.0" of the
xrt position. 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
20.03 mag. Found 99 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 13% of the Genie image region.
Found 1 Genie source(s) within 20.0" of the XRT position. The brightest such
source has ra= 244.6592 dec= -15.7373 mag=19.06 sep=14.60". The closest Genie
source has ra= 244.6592 dec= -15.7373 mag=19.06 sep=14.60".
This paragraph is only useful if the XRT position is grossly wrong. There are 1
candidate(s) in the image data with mag < 19.47 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=244.68759
(16:18:45.02), DEC=-15.73927 (-15:44:21.4) (J2000). It has a mag of 18.81. It
is 205.0" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 182 seconds with the U filter starting
298 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 16:18:45.02 = 244.68759
DEC(J2000) = -15:44:21.4 = -15.73927
with a 90%-confidence error radius of about 0.84 arc sec. The estimated
magnitude is 18.81 with a 1-sigma error of about 0.19. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.243.
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?
732187402 298 U srclist data are not available.
732187402 298 U image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------