image overlap message for exposure 1 of trigger 1277277
uvot_overlap.pl vrs. 2010-12-20b fem started at 241228d08h15m46s517214usUT
The observation of trigger 1277277 started 2024-12-27T03:59:30.9
Examining file ./1277277_g134_uvot_sky_image.fits
The exposure ID is 757051170
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (344.8169,18.5983) with a roll angle of 240.1
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 (344.8240,18.6040) with a radius of 3.000 arc min
This is 0.529 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 (344.8019,18.6106) with a radius of 0.038 arc min
This is 1.130 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
image afterglow message for exposure 1 of trigger 1277277
find_uvot_ag.pl vrs. 2023-04-25a fem started at 241228d08h15m49s977154usUT
Observation start time is 2024-12-27T03:59:30.9
Examining file ./1277277_g134_uvot_catalog_image.fits
The exposure ID is 757051170
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 7 detected source(s) for 1277277_g134
Aspect correction adds -0.00040 degrees (-0.097 sec of time = -1.38 arc sec) to RA
Aspect correction adds -0.00038 degrees (-1.38 arcsec) to Dec
Total aspect correction is 1.95 arcsec
Star catalogs centered at 344.8232 , 18.5995 with radius 2.43 arc min.
n_usno: 61 n_gsc: 56
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 9 matched entries is 0.516" for 1277277_g134
Mean and std. dev of mag. difference (MAG_DELTA) are 0.653 and 0.773 for 1277277_g134
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1277277_g134.
Acceptable entries have no ID, XRT distances < 5.75", 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=344.8240 (22:59:17.76) DEC=18.6040 (+18:36:14.4)
XRT distances are from RA=344.8019 (22:59:12.45) DEC=18.6106 (+18:36:38.3)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 78115.469 counts in the bkg source region of 6319.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 12.362 counts/pixel (5-sig UL in 4" is 19.98 mag) for 1277277_g134
There are 2475.4961 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 12.316 counts/pixel for 1277277_g134
XRT source is too far (67.8223739517647") 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 20.54, XRT distances < 5.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1277277_757051170_241228d08h15m49s977154usUT_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(344.8169,18.5983,45")
fk5;-circle(344.802664628842,18.5940789676406,6")
Region file: 1277277_757051170_241228d08h15m49s977154usUT_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(344.80188,18.61064,8")
image paragraph message for exposure 1 of trigger 1277277
------ Start for Possible Stand-alone Circular ----
In response to GRB241228 (Swift/BAT trigger 1277277) at 03:57:15 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 100 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
0.092.
------- notes for trigger 1277277 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 241228d08h15m55s756015usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1277277
-expid=757051170 -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/1277277/
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 757051170.8877 or about 2024:363:03:59:25 UT
Found 372 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 37 sources in
srclist catalog. Found 0 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 7 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 20.54 mag. Found 57 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 6% of the
Genie image region.
Genie image analysis:
Found 78115.5 counts in the large background region of 6319.0 pixels or a rate
of 12.362 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 19.81 mag. for a
4-arcsec aperture.
Found 2475.5 counts in the XRT position region of 201.0 pixels or a rate of
12.316 counts/pixel in a radius of 8.0 arcsec. The net count rate (using large
background region) at the XRT position is -0.062 +/- 0.337 (1-sigma) cps. The
3-sigma UL at the XRT position is 1.011 cps or 19.59 mag. The closest srclist
source has ra= 344.8040 dec= 18.6280 mag=19.01 sep=62.83". The closest Genie
source has ra= 344.8027 dec= 18.5941 mag=21.05 sep=59.68".
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?
757051170 100 WHITE srclist found no candidates.
757051170 100 WHITE image found no candidates.
List afterglow candidates for other finding charts.
757051384 314 U srclist found no candidates.
757051384 314 U image found no candidates.
757051937 867 WHITE srclist found no candidates.
757051937 867 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 18.61064
GRB_ERROR: 5.75
GRB_RA: 344.80188
IMAGE_START_TIME: 03:59:25
MAGNITUDE: 19.6
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT