image overlap message for exposure 1 of trigger 1209451
uvot_overlap.pl vrs. 2010-12-20b fem started at 240118d06h08m22s712937usUT
The observation of trigger 1209451 started 2024-01-18T06:02:42.3
Examining file 1209451_g3866_uvot_sky_image.fits
The exposure ID is 727250562
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (299.5830,35.1794) with a roll angle of 180.0
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 (299.6570,35.0070) with a radius of 3.000 arc min
This is 10.962 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
Could not find the location of an XRT error circle
image afterglow message for exposure 1 of trigger 1209451
find_uvot_ag.pl vrs. 2023-04-25a fem started at 240118d06h08m23s576049usUT
Observation start time is 2024-01-18T06:02:42.3
Examining file 1209451_g3866_uvot_catalog_image.fits
The exposure ID is 727250562
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 18 detected source(s) for 1209451_g3866
Aspect correction adds -0.00187 degrees (-0.449 sec of time = -5.51 arc sec) to RA
Aspect correction adds 0.00042 degrees ( 1.53 arcsec) to Dec
Total aspect correction is 5.72 arcsec
Star catalogs centered at 299.5870 , 35.1896 with radius 2.93 arc min.
n_usno: 392 n_gsc: 489
*** WARNING -- bright star catalog has 3 entries brighter than 12 mag
The brightest has mag 8.919
RA DEC Mag Color
bright star 0: 299.59032 (19:58:21.68) 35.20161 (+35:12:05.8) 8.92 USNO-V
bright star 1: 299.59017 (19:58:21.64) 35.21686 (+35:13:00.7) 10.03 USNO-V
bright star 2: 299.62599 (19:58:30.24) 35.16512 (+35:09:54.4) 11.43 USNO-V
Mean distance difference (CAT_DELTA) for 16 matched entries is 0.554" for 1209451_g3866
Mean and std. dev of mag. difference (MAG_DELTA) are 1.891 and 0.687 for 1209451_g3866
Found 2 entries without IDs and 0 entries that are acceptable afterglow candidates for 1209451_g3866.
Acceptable entries have no ID, XRT distances < 10", 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=299.6570 (19:58:37.68) DEC=35.0070 (+35:00:25.2)
XRT distances are as reported in catalog file.
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 0:
ra=299.58974 dec= 35.20058 +/- 0.6" mag=13.73+/-0.14 dist=13.0 REFID=4 flag=1
List UVOT sources within 10" of the XRT position:
There are 1.3805556E+05 counts in the bkg source region of 5600.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 24.653 counts/pixel (5-sig UL in 4" is 19.61 mag) for 1209451_g3866
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 20.16, XRT distances < 10",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1209451_727250562_240118d06h08m23s576049usUT_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(299.5830,35.1794,45")
fk5;-circle(299.582574882923,35.185289839313,6")
fk5;-circle(299.57257015052,35.1882452665141,6")
fk5;-circle(299.594174876437,35.1799748366112,6")
fk5;-circle(299.58255520531,35.1801559272775,6")
fk5;-circle(299.580217670279,35.1769571416703,6")
fk5;-circle(299.587544475724,35.1742685587731,6")
fk5;-circle(299.595305601122,35.173377744435,6")
image paragraph message for exposure 1 of trigger 1209451
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: overlap undefined
SRCLIST PROBLEM: no srclist afterglow info
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB240118 (Swift/BAT trigger 1209451) at 04:58:15 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 3834 seconds after the BAT trigger. No credible afterglow candidate
has been found in the initial data products. The overlap of the sub-image and
the XRT error circle is uncertain. Results from the list of sources generated
on-board are not available at this time. No correction has been made for the
large, but uncertain, extinction expected.
------- notes for trigger 1209451 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 240118d06h08m26s058977usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1209451
-expid=727250562 -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/1209451/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for bat position. XRT position found for Genie
image. BAT position found.
UVOT exposure began at MET 727250562.30254 or about 2024:018:06:02:37 UT
No information found about the number of stars in the star catalog for srclist
region.
Found 18 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 20.16 mag. Found 489 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
39% of the Genie image region. The closest Genie source has ra= 299.5897 dec=
35.2006 mag=13.73 sep=12.95".
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?
727250562 3834 WHITE srclist data are not available.
727250562 3834 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------