srclist overlap message for exposure 3 of trigger 1275005
uvot_overlap.pl vrs. 2010-12-20b fem started at 241218d03h29m53s759317usUT
The observation of trigger 1275005 started 2024-12-18T00:23:50.4
Examining file ./1275005_g898_uvot_sky_srclist.fits
The exposure ID is 756174230
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (185.6815,29.9761) with a roll angle of 114.8
It is square with sides of 12.05 arc min. for an area of 145.15 sq arc min
The BAT error circle is centered at (185.6820,29.9910) with a radius of 3.000 arc min
This is 0.893 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 0.177 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 3 of trigger 1275005
find_uvot_ag.pl vrs. 2023-04-25a fem started at 241218d03h30m21s931565usUT
Observation start time is 2024-12-18T00:23:50.4
Examining file ./1275005_g898_uvot_catalog_srclist.fits
The exposure ID is 756174230
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 57 detected source(s) for 1275005_g898
Aspect correction adds -0.00024 degrees (-0.058 sec of time = -0.75 arc sec) to RA
Aspect correction adds -0.00171 degrees (-6.14 arcsec) to Dec
Total aspect correction is 6.19 arcsec
Star catalogs centered at 185.6928 , 29.9687 with radius 7.70 arc min.
n_usno: 286 n_gsc: 418
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.84832
RA DEC Mag Color
bright star 0: 185.63358 (12:22:32.06) 29.89560 (+29:53:44.1) 11.85 USNO-V
Mean distance difference (CAT_DELTA) for 24 matched entries is 0.545" for 1275005_g898
Mean and std. dev of mag. difference (MAG_DELTA) are 1.576 and 1.061 for 1275005_g898
Found 33 entries without IDs and 3 entries that are acceptable afterglow candidates for 1275005_g898.
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.
24 sources matched bright stars.
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)
*** WARNING 57 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1275005_g898 with 3x3 stamp
ra=185.68581 (12:22:44.59) dec=29.94870 (+29:56:55.3) +/- 1.1" mag=19.65+/-0.35
dist=89.1 REFID=55
*** The position of this source is inconsistent with the XRT position.
The position is 152.7 arc sec from the BAT position.
src: 0 distr. of nearby unmatched sources: 0 0 0 0 0
Found 0 entries in star catalog(s) within 20.0" of the candidate.
printing all entries
(Entries within 2 arc sec of a source list entry are considered a match)
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 4 in the list of sources is a candidate afterglow for 1275005_g898 with 3x3 stamp
ra=185.62529 (12:22:30.07) dec=29.97121 (+29:58:16.4) +/- 1.1" mag=19.25+/-0.35
dist=176.0 REFID=52
*** The position of this source is inconsistent with the XRT position.
The position is 190.7 arc sec from the BAT position.
src: 4 distr. of nearby unmatched sources: 0 0 0 0 0
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 6 in the list of sources is a candidate afterglow for 1275005_g898 with 3x3 stamp
ra=185.69823 (12:22:47.58) dec=30.03105 (+30:01:51.8) +/- 1.1" mag=19.38+/-0.35
dist=214.6 REFID=48
*** The position of this source is inconsistent with the XRT position.
The position is 152.8 arc sec from the BAT position.
src: 6 distr. of nearby unmatched sources: 0 0 0 0 0
Found 2 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
185.6963 30.0310 6.1 -1 USNO-B1 21.29 19.92 20.53
185.6962 30.0311 6.4 -1 GSC2.3 20.07 22.19 99.99
*** If XRT position is correct, then this is NOT the afterglow
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
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 3 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 864 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 241218d03h30m24s232010usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1275005
-expid=756174230 -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 756174230.40992 or about 2024:353:00:23:45 UT
Found 410 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 57 sources in
srclist catalog. Found 33 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 0 source(s) in Genie image catalog. Found 0 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.05 mag. Found 13 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 2% of the
Genie image region.
Genie image analysis:
Found 192139.8 counts in the large background region of 6307.0 pixels or a rate
of 30.465 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 19.32 mag. for a
4-arcsec aperture.
Found 6037.5 counts in the XRT position region of 200.0 pixels or a rate of
30.188 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.540 +/- 0.559 (1-sigma) cps. The
3-sigma UL at the XRT position is 1.676 cps or 19.04 mag. The closest srclist
source has ra= 185.6858 dec= 29.9487 mag=19.65 sep=89.10".
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?
756174230 864 WHITE srclist found no candidates.
756174230 864 WHITE image found no candidates.
List afterglow candidates for other finding charts.
756173517 151 WHITE srclist found no candidates.
756173517 151 WHITE image found no candidates.
756173675 309 U srclist found no candidates.
756173675 309 U 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: 00:23:45
MAGNITUDE: 19.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT