srclist overlap message for exposure 2 of trigger 1223072
uvot_overlap.pl vrs. 2010-12-20b fem started at 240419d17h45m16s843342usUT
The observation of trigger 1223072 started 2024-04-19T12:28:42.3
Examining file ./1223072_g349_uvot_sky_srclist.fits
The exposure ID is 735222522
The exposure time is undefined.
The filter is U.
The uvot region is centered at (325.8995,4.2373) with a roll angle of 79.3
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 (325.8770,4.2340) with a radius of 3.000 arc min
This is 1.359 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 27.99 sq. arc min or 0.99 of the BAT error circle
The XRT error circle is centered at (325.8968,4.2348) with a radius of 0.042 arc min
This is 0.219 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 2 of trigger 1223072
find_uvot_ag.pl vrs. 2023-04-25a fem started at 240419d17h45m24s923089usUT
Observation start time is 2024-04-19T12:28:42.3
Examining file ./1223072_g349_uvot_catalog_srclist.fits
The exposure ID is 735222522
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 31 detected source(s) for 1223072_g349
Aspect correction adds 0.00199 degrees (0.477 sec of time = 7.13 arc sec) to RA
Aspect correction adds -0.00019 degrees (-0.68 arcsec) to Dec
Total aspect correction is 7.16 arcsec
Star catalogs centered at 325.9038 , 4.2353 with radius 5.76 arc min.
n_usno: 267 n_gsc: 318
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 10.5047
RA DEC Mag Color
bright star 0: 325.92068 (21:43:40.96) 4.22406 (+04:13:26.6) 10.50 USNO-V
Mean distance difference (CAT_DELTA) for 26 matched entries is 0.608" for 1223072_g349
Mean and std. dev of mag. difference (MAG_DELTA) are 1.939 and 0.553 for 1223072_g349
Found 5 entries without IDs and 0 entries that are acceptable afterglow candidates for 1223072_g349.
Acceptable entries have no ID, XRT distances < 6.25", 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=325.8770 (21:43:30.48) DEC= 4.2340 (+04:14:02.4)
XRT distances are from RA=325.8968 (21:43:35.23) DEC= 4.2348 (+04:14:05.2)
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 5:
ra=325.92020 dec= 4.22299 +/- 1.1" mag=18.82+/-0.35 dist=94.2 REFID=28
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 18.12, XRT distances < 6.25",
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 2 of trigger 1223072
------ Start for Possible Stand-alone Circular ----
In response to GRB240419 (Swift/BAT trigger 1223072) at 12:22:52 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
316 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 19.2 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 18.0 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.077.
------- notes for trigger 1223072 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 240419d17h45m28s026691usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1223072
-expid=735222522 -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/1223072/
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 735222522.277 or about 2024:110:12:28:37 UT
Found 318 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 31 sources in
srclist catalog. Found 5 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.12 mag.
Found 5 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 20.04 mag. Found 47 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 5% of the
Genie image region.
Genie image analysis:
Found 37485.0 counts in the large background region of 6199.0 pixels or a rate
of 6.047 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 19.30 mag. for a
4-arcsec aperture.
Found 1209.6 counts in the XRT position region of 200.0 pixels or a rate of
6.048 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.024 +/- 0.150 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.450 cps or 19.02 mag. The closest srclist
source has ra= 325.9069 dec= 4.2463 mag=18.05 sep=55.28". The closest Genie
source has ra= 325.9068 dec= 4.2463 mag=17.83 sep=55.00".
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?
735222522 316 U srclist found no candidates.
735222522 316 U image found no candidates.
List afterglow candidates for other finding charts.
735222364 158 WHITE srclist found no candidates.
735222364 158 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 4.23478
GRB_ERROR: 6.25
GRB_RA: 325.89679
IMAGE_START_TIME: 12:28:37
MAGNITUDE: 19.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT