image overlap message for exposure 3 of trigger 1267921
uvot_overlap.pl vrs. 2010-12-20b fem started at 241116d21h31m21s334796usUT
The observation of trigger 1267921 started 2024-11-15T13:33:40.1
Examining file ./1267921_g914_uvot_sky_image.fits
The exposure ID is 753370420
The exposure time is 149.868 (seconds)
The filter is WHITE.
*** Warning -- found 3824 null pixels in the image.
The uvot region is centered at (86.7708,-0.6662) with a roll angle of 120.9
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 (86.7650,-0.6620) with a radius of 3.000 arc min
This is 0.429 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 (86.7710,-0.6746) with a radius of 0.037 arc min
This is 0.504 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 1267921
find_uvot_ag.pl vrs. 2023-04-25a fem started at 241116d21h31m47s111380usUT
Observation start time is 2024-11-15T13:33:40.1
Examining file ./1267921_g914_uvot_catalog_image.fits
The exposure ID is 753370420
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 2 detected source(s) for 1267921_g914
Aspect correction adds -0.00014 degrees (-0.035 sec of time = -0.52 arc sec) to RA
Aspect correction adds -0.00148 degrees (-5.32 arcsec) to Dec
Total aspect correction is 5.35 arcsec
Star catalogs centered at 86.7636 , -0.6730 with radius 2.07 arc min.
n_usno: 34 n_gsc: 38
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 1 matched entries is 0.430" for 1267921_g914
Mean and std. dev of mag. difference (MAG_DELTA) are 2.868 and 0.000 for 1267921_g914
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1267921_g914.
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=86.7650 (05:47:03.60) DEC=-0.6620 (-00:39:43.2)
XRT distances are from RA=86.7710 (05:47:05.03) DEC=-0.6746 (-00:40:28.6)
*** WARNING 50 per cent of entries have no IDs.
-----------------
Entry 1 in the list of sources is a candidate afterglow for 1267921_g914 with genie
ra=86.76827 (05:47:04.39) dec=-0.68982 (-00:41:23.3) +/- 1.1" mag=20.48+/-0.29
dist=55.6 REFID=1 major=1.3 minor=0.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 97.3 arc sec from the BAT position.
This source is near the edge of image (0.861)
Found 6 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
86.7678 -0.6855 15.8 -1 USNO-B1 99.99 19.21 99.99
86.7718 -0.6903 13.0 -1 USNO-B1 19.93 18.05 18.89
86.7694 -0.6918 8.2 -1 USNO-B1 18.70 16.44 17.44
86.7678 -0.6855 15.7 -1 GSC2.3 20.14 99.99 99.99
86.7719 -0.6903 13.0 -1 GSC2.3 17.95 20.52 99.99
86.7694 -0.6918 8.1 -1 GSC2.3 16.43 19.18 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 1.4476181E+05 counts in the bkg source region of 6193.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 23.375 counts/pixel (5-sig UL in 4" is 19.64 mag) for 1267921_g914
There are 4810.3794 counts in the xrt source region of 203.00000 pixels.
Rate in xrt region with 8 arcsec radius is 23.696 counts/pixel for 1267921_g914
There are 29498.580 counts in the xrt_bkg source region of 1248.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 23.637 counts/pixel (5-sig UL in 4" is 19.63 mag) for 1267921_g914
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.19, 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: 1267921_753370420_241116d21h31m47s111380usUT_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(86.7708,-0.6662,45")
fk5;-circle(86.7694623264015,-0.656226889296251,6")
Region file: 1267921_753370420_241116d21h31m47s111380usUT_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(86.77096,-0.67461,8")
Region file: 1267921_753370420_241116d21h31m47s111380usUT_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(86.77096,-0.67461,25")
fk5;-circle(86.77096,-0.67461,15")
image paragraph message for exposure 3 of trigger 1267921
------ Start for Possible Stand-alone Circular ----
In response to GRB241115 (Swift/BAT trigger 1267921) at 13:18:25 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 880 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
1.029.
------- notes for trigger 1267921 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 241116d21h31m55s146974usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1267921
-expid=753370420 -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/1267921/
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 753370420.1293 or about 2024:320:13:33:35 UT
Found 461 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 23 sources in
srclist catalog. Found 4 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 2 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 20.19 mag. Found 38 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 6% of the
Genie image region. The Genie image is INCOMPLETE with 3824 null pixels.
Genie image analysis:
Found 144761.8 counts in the large background region of 6193.0 pixels or a rate
of 23.375 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 19.46 mag. for a
4-arcsec aperture.
Found 4810.4 counts in the XRT position region of 203.0 pixels or a rate of
23.697 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.081 +/- 0.498 (1-sigma) cps or
22.33 mag and a range from 20.20 to 99.99 mag. The 3-sigma UL at the XRT
position is 1.576 cps or 19.11 mag. The closest srclist source has ra= 86.7565
dec= -0.6829 mag=19.54 sep=60.11". The closest Genie source has ra= 86.7683
dec= -0.6898 mag=20.48 sep=55.59".
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?
753370420 880 WHITE srclist found no candidates.
753370420 880 WHITE image found no candidates.
List afterglow candidates for other finding charts.
753369653 113 WHITE srclist found no candidates.
753369653 113 WHITE image found no candidates.
753369865 325 ? srclist data are not available.
753369865 325 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -0.67461
GRB_ERROR: 5.5
GRB_RA: 86.77096
IMAGE_START_TIME: 13:33:35
MAGNITUDE: 19.1
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT