image overlap message for exposure 2 of trigger 1263840
uvot_overlap.pl vrs. 2010-12-20b fem started at 241030d23h40m15s982128usUT
The observation of trigger 1263840 started 2024-10-30T18:49:16.3
Examining file ./1263840_g895_uvot_sky_image.fits
The exposure ID is 752006956
The exposure time is 55.421 (seconds)
The filter is WHITE.
The uvot region is centered at (50.7930,34.4395) with a roll angle of 38.0
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 (50.7880,34.4320) with a radius of 3.000 arc min
This is 0.513 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 (50.7925,34.4470) with a radius of 0.040 arc min
This is 0.450 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 2 of trigger 1263840
find_uvot_ag.pl vrs. 2023-04-25a fem started at 241030d23h40m29s943450usUT
Observation start time is 2024-10-30T18:49:16.3
Examining file ./1263840_g895_uvot_catalog_image.fits
The exposure ID is 752006956
The exposure is 55.421 sec.
The bin size is 2 pixels
The filter is WHITE
There are 9 detected source(s) for 1263840_g895
Aspect correction adds 0.00128 degrees (0.307 sec of time = 3.80 arc sec) to RA
Aspect correction adds 0.00100 degrees ( 3.58 arcsec) to Dec
Total aspect correction is 5.22 arcsec
Star catalogs centered at 50.7864 , 34.4314 with radius 2.28 arc min.
n_usno: 64 n_gsc: 62
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 9 matched entries is 0.397" for 1263840_g895
Mean and std. dev of mag. difference (MAG_DELTA) are 0.985 and 0.378 for 1263840_g895
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1263840_g895.
Acceptable entries have no ID, XRT distances < 6", 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=50.7880 (03:23:09.12) DEC=34.4320 (+34:25:55.2)
XRT distances are from RA=50.7925 (03:23:10.19) DEC=34.4470 (+34:26:49.2)
Found 1 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
50.7957 34.4462 9.9 -1 GSC2.3 99.99 21.30 99.99
The closest star is 9.87" away.
List UVOT sources within 10" of the XRT position:
There are 30030.602 counts in the bkg source region of 5971.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 5.029 counts/pixel (5-sig UL in 4" is 19.39 mag) for 1263840_g895
There are 994.89917 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 4.950 counts/pixel for 1263840_g895
There are 6155.8008 counts in the xrt_bkg source region of 1241.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 4.960 counts/pixel (5-sig UL in 4" is 19.40 mag) for 1263840_g895
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 19.95, XRT distances < 6",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1263840_752006956_241030d23h40m29s943450usUT_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(50.7930,34.4395,45")
fk5;-circle(50.7922212200006,34.433072235228,6")
fk5;-circle(50.7891523569621,34.4391853669713,6")
fk5;-circle(50.7826782699995,34.4282836691713,6")
fk5;-circle(50.7810466370808,34.4404861683532,6")
Region file: 1263840_752006956_241030d23h40m29s943450usUT_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(50.79246,34.44700,8")
Region file: 1263840_752006956_241030d23h40m29s943450usUT_xrt_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(50.79246,34.44700,25")
fk5;-circle(50.79246,34.44700,15")
fk5;-circle(50.7891523569621,34.4391853669713,6")
image paragraph message for exposure 2 of trigger 1263840
SRCLIST PROBLEM: srclist filled telemetry buffer
------ Start for Possible Stand-alone Circular ----
In response to GRB241030 (Swift/BAT trigger 1263840) at 18:34:20 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 55 seconds with the White filter
starting 860 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
0.204.
------- notes for trigger 1263840 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 241030d23h40m34s536144usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1263840
-expid=752006956 -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/1263840/
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 752006956.34092 or about 2024:304:18:49:11 UT
Found 872 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 66 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.68 mag.
Found 9 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 19.95 mag. Found 62 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 30030.6 counts in the large background region of 5971.0 pixels or a rate
of 5.029 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 19.21 mag. for a
4-arcsec aperture.
Found 994.9 counts in the XRT position region of 201.0 pixels or a rate of
4.950 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.039 +/- 0.618 (1-sigma) cps. The
3-sigma UL at the XRT position is 1.855 cps or 18.93 mag. The number of srclist
sources filled the available telemetry. The weakest source detected was 19.90
mag. The closest srclist source has ra= 50.7892 dec= 34.4395 mag=19.60
sep=28.80". The closest Genie source has ra= 50.7891 dec= 34.4392 mag=18.45
sep=29.80".
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?
752006956 860 WHITE srclist found no candidates.
752006956 860 WHITE image found no candidates.
List afterglow candidates for other finding charts.
752006256 160 WHITE srclist found no candidates.
752006256 160 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 34.44700
GRB_ERROR: 6
GRB_RA: 50.79246
IMAGE_START_TIME: 18:49:11
MAGNITUDE: 18.9
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT