srclist overlap message for exposure 1 of trigger 1275005
uvot_overlap.pl vrs. 2010-12-20b fem started at 241218d03h29m52s668501usUT
The observation of trigger 1275005 started 2024-12-18T00:11:57.4
Examining file ./1275005_g185_uvot_sky_srclist.fits
The exposure ID is 756173517
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (185.6907,29.9866) with a roll angle of 114.8
It is square with sides of 8.03 arc min. for an area of 64.51 sq arc min
The BAT error circle is centered at (185.6820,29.9910) with a radius of 3.000 arc min
This is 0.521 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 28.27 sq. arc min or 1.00 of the BAT error circle
The XRT error circle is centered at (185.6817,29.9732) with a radius of 0.040 arc min
This is 0.931 arc min from the center of the uvot region
The area of the XRT error circle is 0.005 sq. arc min
The UVOT/XRT overlap is 0.005 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 1 of trigger 1275005
find_uvot_ag.pl vrs. 2023-04-25a fem started at 241218d03h29m56s741964usUT
Observation start time is 2024-12-18T00:11:57.4
Examining file ./1275005_g185_uvot_catalog_srclist.fits
The exposure ID is 756173517
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 15 detected source(s) for 1275005_g185
Aspect correction adds -0.00003 degrees (-0.008 sec of time = -0.10 arc sec) to RA
Aspect correction adds -0.00171 degrees (-6.16 arcsec) to Dec
Total aspect correction is 6.16 arcsec
Star catalogs centered at 185.6837 , 29.9897 with radius 5.59 arc min.
n_usno: 161 n_gsc: 200
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 13 matched entries is 0.606" for 1275005_g185
Mean and std. dev of mag. difference (MAG_DELTA) are 1.115 and 0.525 for 1275005_g185
Found 2 entries without IDs and 0 entries that are acceptable afterglow candidates for 1275005_g185.
Acceptable entries have no ID, XRT distances < 6", 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=185.6820 (12:22:43.68) DEC=29.9910 (+29:59:27.6)
XRT distances are from RA=185.6817 (12:22:43.60) DEC=29.9732 (+29:58:23.5)
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 6:
ra=185.68268 dec= 29.91741 +/- 1.1" mag=20.07+/-0.35 dist=200.8 REFID=15
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
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 19.22, XRT distances < 6",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
srclist paragraph message for exposure 1 of trigger 1275005
------ Start for Possible Stand-alone Circular ----
In response to GRB241218 (Swift/BAT trigger 1275005) at 00:08:51 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 151 seconds after the BAT trigger. No credible afterglow candidate has
been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of
the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag.
The 8'x8' region for the list of sources generated on-board covers 100% of the
XRT error circle. The list of sources is typically complete to about 18 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.024.
------- notes for trigger 1275005 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 241218d03h29m59s087215usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1275005
-expid=756173517 -meonly -msg_srclist
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/1275005/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
XRT position found for srclist. XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 756173517.3634 or about 2024:353:00:11:52 UT
Found 200 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 15 sources in
srclist catalog. Found 2 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
Found 1 source(s) in Genie image catalog. Found 1 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.60 mag. Found 19 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 3% of the
Genie image region.
Genie image analysis:
Found 70041.7 counts in the large background region of 6313.0 pixels or a rate
of 11.095 counts/pixel in a radius of 45.0 arcsec. Based on this background,
the typical 5-sigma UL at a random point in the Genie image is 19.87 mag. for a
4-arcsec aperture.
Found 2114.3 counts in the XRT position region of 198.0 pixels or a rate of
10.678 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.561 +/- 0.331 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.993 cps or 19.61 mag. The closest srclist
source has ra= 185.7072 dec= 29.9553 mag=17.47 sep=102.38". The closest Genie
source has ra= 185.6692 dec= 29.9553 mag=20.37 sep=75.26".
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?
756173517 151 WHITE srclist found no candidates.
756173517 151 WHITE image found no candidates.
List afterglow candidates for other finding charts.
756173675 309 U srclist found no candidates.
756173675 309 U image found no candidates.
756174230 864 WHITE srclist found no candidates.
756174230 864 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 29.97319
GRB_ERROR: 6
GRB_RA: 185.68167
IMAGE_START_TIME: 00:11:52
MAGNITUDE: 19.6
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT