image overlap message for exposure 2 of trigger 1430212
uvot_overlap.pl vrs. 2010-12-20b fem started at 260104d14h51m41s391388usUT
The observation of trigger 1430212 started 2026-01-04T05:42:43.3
Examining file ./1430212_g340_uvot_sky_image.fits
The exposure ID is 789198163
The exposure time is 249.946 (seconds)
The filter is U.
The uvot region is centered at (337.4090,-21.2834) with a roll angle of 258.0
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 (337.4150,-21.2800) with a radius of 3.000 arc min
This is 0.393 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 (337.3992,-21.2955) with a radius of 0.033 arc min
This is 0.911 arc min from the center of the uvot region
The area of the XRT error circle is 0.003 sq. arc min
The UVOT/XRT overlap is 0.003 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1430212
find_uvot_ag.pl vrs. 2023-04-25a fem started at 260104d14h51m56s097136usUT
Observation start time is 2026-01-04T05:42:43.3
Examining file ./1430212_g340_uvot_catalog_image.fits
The exposure ID is 789198163
The exposure is 249.946 sec.
The bin size is 2 pixels
The filter is U
There are 4 detected source(s) for 1430212_g340
Aspect correction adds -0.00103 degrees (-0.247 sec of time = -3.45 arc sec) to RA
Aspect correction adds -0.00028 degrees (-1.01 arcsec) to Dec
Total aspect correction is 3.59 arcsec
Star catalogs centered at 337.4163 , -21.2813 with radius 2.28 arc min.
n_usno: 28 n_gsc: 27
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 4 matched entries is 0.464" for 1430212_g340
Mean and std. dev of mag. difference (MAG_DELTA) are 1.196 and 0.966 for 1430212_g340
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1430212_g340.
Acceptable entries have no ID, XRT distances < 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=337.4150 (22:29:39.60) DEC=-21.2800 (-21:16:48.0)
XRT distances are from RA=337.3992 (22:29:35.81) DEC=-21.2955 (-21:17:43.9)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 54263.750 counts in the bkg source region of 6279.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 8.642 counts/pixel (5-sig UL in 4" is 19.29 mag) for 1430212_g340
There are 1846.3824 counts in the xrt source region of 199.00000 pixels.
Rate in xrt region with 8 arcsec radius is 9.278 counts/pixel for 1430212_g340
XRT source is too far (54.6385866892183") 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 19.85, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1430212_789198163_260104d14h51m56s097136usUT_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(337.4090,-21.2834,45")
fk5;-circle(337.423068194056,-21.2832180023143,6")
Region file: 1430212_789198163_260104d14h51m56s097136usUT_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(337.39921,-21.29553,8")
image paragraph message for exposure 2 of trigger 1430212
------ Start for Possible Stand-alone Circular ----
In response to GRB260104 (Swift/BAT trigger 1430212) at 05:37:02 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
303 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
0.033.
------- notes for trigger 1430212 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 260104d14h52m00s693318usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1430212
-expid=789198163 -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/1430212/
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 789198163.31162 or about 0000:11692:05:42:47 UT
Found 401 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 3% of the srclist region. Found 26 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
18.12 mag.
Found 4 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 19.85 mag. Found 27 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 54263.8 counts in the large background region of 6279.0 pixels or a rate
of 8.642 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 19.08 mag. for a
4-arcsec aperture.
Found 1846.4 counts in the XRT position region of 199.0 pixels or a rate of
9.278 counts/pixel in a radius of 8.0 arcsec. The net count rate (using large
background region) at the XRT position is 0.506 +/- 0.174 (1-sigma) cps or
18.87 mag and a range from 18.55 to 19.33 mag. The 3-sigma UL at the XRT
position is 1.030 cps or 18.10 mag. The closest srclist source has ra= 337.3773
dec= -21.3104 mag=16.57 sep=90.79". The closest Genie source has ra= 337.4245
dec= -21.3004 mag=18.50 sep=86.52".
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?
789198163 303 U srclist found no candidates.
789198163 303 U image found no candidates.
List afterglow candidates for other finding charts.
789197950 90 WHITE srclist found no candidates.
789197950 90 WHITE image found no candidates.
789198717 857 WHITE srclist found no candidates.
789198717 857 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -21.29553
GRB_ERROR: 5
GRB_RA: 337.39921
MAGNITUDE: 18.1
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT