image overlap message for exposure 3 of trigger 1222955
uvot_overlap.pl vrs. 2010-12-20b fem started at 240419d08h17m34s553859usUT
The observation of trigger 1222955 started 2024-04-19T02:03:09.4
Examining file ./1222955_g907_uvot_sky_image.fits
The exposure ID is 735184989
The exposure time is 149.846 (seconds)
The filter is WHITE.
The uvot region is centered at (94.5583,-45.0094) with a roll angle of 294.3
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 (94.5680,-45.0110) with a radius of 3.000 arc min
This is 0.422 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 7.17 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (94.5340,-44.9995) with a radius of 0.037 arc min
This is 1.188 arc min from the center of the uvot region
The area of the XRT error circle is 0.004 sq. arc min
The UVOT/XRT overlap is 0.004 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 3 of trigger 1222955
find_uvot_ag.pl vrs. 2023-04-25a fem started at 240419d08h17m50s964117usUT
Observation start time is 2024-04-19T02:03:09.4
Examining file ./1222955_g907_uvot_catalog_image.fits
The exposure ID is 735184989
The exposure is 149.846 sec.
The bin size is 2 pixels
The filter is WHITE
There are 11 detected source(s) for 1222955_g907
Aspect correction adds -0.00255 degrees (-0.613 sec of time = -6.50 arc sec) to RA
Aspect correction adds 0.00095 degrees ( 3.41 arcsec) to Dec
Total aspect correction is 7.34 arcsec
Star catalogs centered at 94.5589 , -45.0092 with radius 2.64 arc min.
n_usno: 79 n_gsc: 84
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 12 matched entries is 0.354" for 1222955_g907
Mean and std. dev of mag. difference (MAG_DELTA) are 0.694 and 0.577 for 1222955_g907
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1222955_g907.
Acceptable entries have no ID, XRT distances < 5.5", 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=94.5680 (06:18:16.32) DEC=-45.0110 (-45:00:39.6)
XRT distances are from RA=94.5340 (06:18:08.17) DEC=-44.9995 (-44:59:58.3)
Found 2 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
94.5337 -44.9975 7.4 -1 USNO-B1 21.03 19.77 20.33
94.5336 -44.9974 7.9 -1 GSC2.3 19.49 21.52 99.99
The closest star is 7.36" away.
List UVOT sources within 10" of the XRT position:
There are 34395.535 counts in the bkg source region of 5871.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 5.859 counts/pixel (5-sig UL in 4" is 20.39 mag) for 1222955_g907
There are 1080.5251 counts in the xrt source region of 196.00000 pixels.
Rate in xrt region with 8 arcsec radius is 5.513 counts/pixel for 1222955_g907
XRT source is too far (71.2394559477398") from center -- do not compute local background.
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 20.94, XRT distances < 5.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1222955_735184989_240419d08h17m50s964117usUT_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(94.5583,-45.0094,45")
fk5;-circle(94.5725427864706,-45.0124907624185,6")
fk5;-circle(94.5626251964717,-45.0026061322675,6")
fk5;-circle(94.5547249043061,-45.0035894903871,6")
fk5;-circle(94.550709675259,-44.9991957891595,6")
fk5;-circle(94.5519170926277,-44.9966082177316,6")
Region file: 1222955_735184989_240419d08h17m50s964117usUT_xrt.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(94.53404,-44.99953,8")
image paragraph message for exposure 3 of trigger 1222955
SRCLIST PROBLEM: srclist filled telemetry buffer
------ Start for Possible Stand-alone Circular ----
In response to GRB240419 (Swift/BAT trigger 1222955) at 01:48:01 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 874 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
0.070.
------- notes for trigger 1222955 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 240419d08h17m54s245004usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1222955
-expid=735184989 -meonly -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/1222955/
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 735184989.4158 or about 2024:110:02:03:04 UT
Found 1006 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 9% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 38 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 20.94 mag. Found 84 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
8% of the Genie image region.
Genie image analysis:
Found 34395.5 counts in the large background region of 5871.0 pixels or a rate
of 5.859 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 20.22 mag. for a
4-arcsec aperture.
Found 1080.5 counts in the XRT position region of 196.0 pixels or a rate of
5.513 counts/pixel in a radius of 8.0 arcsec. The net count rate (using large
background region) at the XRT position is -0.452 +/- 0.223 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.669 cps or 20.04 mag. The number of srclist
sources filled the available telemetry. The weakest source detected was 19.60
mag. The closest srclist source has ra= 94.5294 dec= -44.9944 mag=19.43
sep=21.95". The closest Genie source has ra= 94.5275 dec= -45.0004 mag=19.53
sep=16.90".
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?
735184989 874 WHITE srclist found no candidates.
735184989 874 WHITE image found no candidates.
List afterglow candidates for other finding charts.
735184227 112 WHITE srclist found no candidates.
735184227 112 WHITE image found no candidates.
735184385 270 U srclist found no candidates.
735184385 270 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -44.99953
GRB_ERROR: 5.5
GRB_RA: 94.53404
IMAGE_START_TIME: 02:03:04
MAGNITUDE: 20.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT