image overlap message for exposure 3 of trigger 1430212
uvot_overlap.pl vrs. 2010-12-20b fem started at 260104d14h51m42s044426usUT
The observation of trigger 1430212 started 2026-01-04T05:51:57.1
Examining file ./1430212_g894_uvot_sky_image.fits
The exposure ID is 789198717
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (337.4079,-21.2831) 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 0.436 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 0.892 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 3 of trigger 1430212
find_uvot_ag.pl vrs. 2023-04-25a fem started at 260104d14h52m06s885484usUT
Observation start time is 2026-01-04T05:51:57.1
Examining file ./1430212_g894_uvot_catalog_image.fits
The exposure ID is 789198717
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 6 detected source(s) for 1430212_g894
Aspect correction adds -0.00088 degrees (-0.212 sec of time = -2.96 arc sec) to RA
Aspect correction adds -0.00004 degrees (-0.14 arcsec) to Dec
Total aspect correction is 2.97 arcsec
Star catalogs centered at 337.4127 , -21.2813 with radius 2.45 arc min.
n_usno: 28 n_gsc: 31
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 5 matched entries is 0.354" for 1430212_g894
Mean and std. dev of mag. difference (MAG_DELTA) are 0.783 and 0.243 for 1430212_g894
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1430212_g894.
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)
-----------------
Entry 1 in the list of sources is a candidate afterglow for 1430212_g894 with genie
ra=337.40586 (22:29:37.41) dec=-21.28556 (-21:17:08.0) +/- 0.7" mag=19.40+/-0.18
dist=42.3 REFID=5 major=0.8 minor=0.7 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 36.6 arc sec from the BAT position.
Found 1 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
337.4051 -21.2826 11.0 -1 GSC2.3 99.99 21.93 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:
There are 1.6950869E+05 counts in the bkg source region of 6193.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 27.371 counts/pixel (5-sig UL in 4" is 19.55 mag) for 1430212_g894
There are 5496.9541 counts in the xrt source region of 199.00000 pixels.
Rate in xrt region with 8 arcsec radius is 27.623 counts/pixel for 1430212_g894
XRT source is too far (53.4053190295012") from center -- do not compute local background.
There are 1 candidate(s) outside XRT error circle with mag < 19.55
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.11, 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_789198717_260104d14h52m06s885484usUT_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(337.4079,-21.2831,45")
fk5;-circle(337.40586312126,-21.2855568133243,6")
Region file: 1430212_789198717_260104d14h52m06s885484usUT_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 3 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 150 seconds with the White filter
starting 857 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
0.033.
------- notes for trigger 1430212 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 260104d14h52m11s377299usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1430212
-expid=789198717 -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 789198717.10892 or about 0000:11692:05:52:01 UT
Found 393 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 3% of the srclist region. Found 48 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
19.22 mag.
Found 6 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 20.11 mag. Found 31 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 169508.7 counts in the large background region of 6193.0 pixels or a rate
of 27.371 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 19.38 mag. for a
4-arcsec aperture.
Found 5497.0 counts in the XRT position region of 199.0 pixels or a rate of
27.623 counts/pixel in a radius of 8.0 arcsec. The net count rate (using large
background region) at the XRT position is 0.334 +/- 0.502 (1-sigma) cps or
20.79 mag and a range from 19.80 to 99.99 mag. The 3-sigma UL at the XRT
position is 1.841 cps or 18.94 mag. The closest srclist source has ra= 337.4243
dec= -21.3005 mag=18.43 sep=85.96". The closest Genie source has ra= 337.4059
dec= -21.2856 mag=19.40 sep=42.27".
This paragraph is only useful if the XRT position is grossly wrong. There are 1
candidate(s) in the image data with mag < 19.55 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=337.40586
(22:29:37.41), DEC=-21.28556 (-21:17:08.0) (J2000). It has a mag of 19.40. It
is 36.6" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 857 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 22:29:37.41 = 337.40586
DEC(J2000) = -21:17:08.0 = -21.28556
with a 90%-confidence error radius of about 0.70 arc sec. The estimated
magnitude is 19.40 with a 1-sigma error of about 0.18. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.033.
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?
789198717 857 WHITE srclist found no candidates.
789198717 857 WHITE 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.
789198163 303 U srclist found no candidates.
789198163 303 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -21.29553
GRB_ERROR: 5
GRB_RA: 337.39921
MAGNITUDE: 18.9
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT