srclist overlap message for exposure 1 of trigger 1270999
uvot_overlap.pl vrs. 2010-12-20b fem started at 241129d00h00m11s496433usUT
The observation of trigger 1270999 started 2024-11-28T17:19:48.4
Examining file ./1270999_g3913_uvot_sky_srclist.fits
The exposure ID is 754507188
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (273.7199,33.4293) with a roll angle of 210.5
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 (273.7240,33.4350) with a radius of 3.000 arc min
This is 0.401 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 (273.7235,33.4391) with a radius of 0.050 arc min
This is 0.620 arc min from the center of the uvot region
The area of the XRT error circle is 0.008 sq. arc min
The UVOT/XRT overlap is 0.008 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 1 of trigger 1270999
find_uvot_ag.pl vrs. 2023-04-25a fem started at 241129d00h00m14s686620usUT
Observation start time is 2024-11-28T17:19:48.4
Examining file ./1270999_g3913_uvot_catalog_srclist.fits
The exposure ID is 754507188
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 98 detected source(s) for 1270999_g3913
Aspect correction adds -0.00152 degrees (-0.365 sec of time = -4.56 arc sec) to RA
Aspect correction adds 0.00023 degrees ( 0.84 arcsec) to Dec
Total aspect correction is 4.64 arcsec
Star catalogs centered at 273.7178 , 33.4269 with radius 6.25 arc min.
n_usno: 867 n_gsc: 1450
*** WARNING -- bright star catalog has 4 entries brighter than 12 mag
The brightest has mag 9.8
RA DEC Mag Color
bright star 0: 273.67398 (18:14:41.75) 33.47513 (+33:28:30.5) 10.90 USNO-V
bright star 1: 273.78624 (18:15:08.70) 33.36199 (+33:21:43.2) 11.45 USNO-V
bright star 2: 273.82260 (18:15:17.42) 33.46319 (+33:27:47.5) 11.71 GSC-V
bright star 3: 273.79984 (18:15:11.96) 33.35205 (+33:21:07.4) 9.80 GSC-V
Mean distance difference (CAT_DELTA) for 97 matched entries is 0.713" for 1270999_g3913
Mean and std. dev of mag. difference (MAG_DELTA) are 2.177 and 0.487 for 1270999_g3913
Found 4 entries without IDs and 1 entries that are acceptable afterglow candidates for 1270999_g3913.
Acceptable entries have no ID, XRT distances < 7.5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
3 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=273.7240 (18:14:53.76) DEC=33.4350 (+33:26:06.0)
XRT distances are from RA=273.7235 (18:14:53.65) DEC=33.4391 (+33:26:20.9)
-----------------
Entry 33 in the list of sources is a candidate afterglow for 1270999_g3913 with 3x3 stamp
ra=273.68330 (18:14:43.99) dec=33.40459 (+33:24:16.5) +/- 1.1" mag=19.22+/-0.35
dist=173.5 REFID=94
*** The position of this source is inconsistent with the XRT position.
The position is 164.1 arc sec from the BAT position.
src: 33 distr. of nearby unmatched sources: 0 0 1 0 0
Found 12 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)
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
273.6823 33.4081 13.1 -1 USNO-B1 19.56 18.82 19.15
273.6870 33.4022 14.1 -1 USNO-B1 17.91 16.95 17.38
273.6837 33.4040 2.3 -1 USNO-B1 17.20 16.54 16.83 *
273.6843 33.4020 9.9 -1 USNO-B1 18.43 17.80 18.07
273.6824 33.4081 13.1 -1 GSC2.3 18.78 20.17 19.48
273.6823 33.4081 13.1 -1 GSC2.3 18.62 20.29 99.99
273.6871 33.4022 14.4 -1 GSC2.3 17.12 18.51 17.94
273.6870 33.4022 14.2 -1 GSC2.3 17.35 18.44 99.99
273.6837 33.4040 2.4 -1 GSC2.3 16.86 17.75 17.44 *
273.6837 33.4040 2.2 -1 GSC2.3 17.13 17.90 99.99 *
273.6844 33.4019 10.2 -1 GSC2.3 18.28 19.30 18.75
273.6843 33.4019 10.2 -1 GSC2.3 18.24 19.29 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 3 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
273.7251 33.4373 8.2 -1 USNO-B1 20.66 19.05 19.76
273.7252 33.4373 8.4 -1 GSC2.3 19.10 21.39 99.99
273.7253 33.4373 8.5 -1 GSC2.3 19.15 21.13 99.99
The closest star is 8.20" away.
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 < 7.5",
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 1270999
------ Start for Possible Stand-alone Circular ----
In response to GRB241128 (Swift/BAT trigger 1270999) at 16:14:34 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 3879 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 0.067.
------- notes for trigger 1270999 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 241129d00h00m19s691016usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1270999
-expid=754507188 -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/1270999/
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 754507188.43776 or about 2024:333:17:19:43 UT
Found 1441 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 25% of the srclist region. Found 98 sources in
srclist catalog. Found 4 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 11 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 20.10 mag. Found 222 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
22% of the Genie image region.
Genie image analysis:
Found 170812.8 counts in the large background region of 6120.0 pixels or a rate
of 27.911 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 19.37 mag. for a
4-arcsec aperture.
Found 5688.3 counts in the XRT position region of 198.0 pixels or a rate of
28.729 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.629 +/- 0.541 (1-sigma) cps or
20.11 mag and a range from 19.43 to 22.25 mag. The 3-sigma UL at the XRT
position is 2.252 cps or 18.72 mag. The closest srclist source has ra= 273.7188
dec= 33.4458 mag=15.53 sep=27.82". The closest Genie source has ra= 273.7188
dec= 33.4459 mag=14.78 sep=28.14".
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?
754507188 3879 WHITE srclist found no candidates.
754507188 3879 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 33.43914
GRB_ERROR: 7.5
GRB_RA: 273.72354
IMAGE_START_TIME: 17:19:43
MAGNITUDE: 18.7
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT