image overlap message for exposure 2 of trigger 1148770
uvot_overlap.pl vrs. 2010-12-20b fem started at 230113d00h51m19s460373usUT
The observation of trigger 1148770 started 2023-01-13T00:42:59.4
Examining file 1148770_g909_uvot_sky_image.fits
The exposure ID is 695263379
The exposure time is 144.756 (seconds)
The filter is WHITE.
The uvot region is centered at (299.5174,35.1095) with a roll angle of 185.8
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 (299.5120,35.0750) with a radius of 3.000 arc min
This is 2.085 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 5.92 sq. arc min or 0.21 of the BAT error circle
Could not find the location of an XRT error circle
image afterglow message for exposure 2 of trigger 1148770
find_uvot_ag.pl vrs. 2020-10-30 fem started at 230113d00h51m20s439463usUT
Observation start time is 2023-01-13T00:42:59.4
Examining file 1148770_g909_uvot_catalog_image.fits
The exposure ID is 695263379
The exposure is 144.756 sec.
The bin size is 2 pixels
The filter is WHITE
There are 20 detected source(s) for 1148770_g909
Aspect correction adds -0.00024 degrees (-0.057 sec of time = -0.70 arc sec) to RA
Aspect correction adds 0.00065 degrees ( 2.33 arcsec) to Dec
Total aspect correction is 2.43 arcsec
Star catalogs centered at 299.5119 , 35.1091 with radius 2.63 arc min.
n_usno: 303 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 19 matched entries is 0.516" for 1148770_g909
Mean and std. dev of mag. difference (MAG_DELTA) are 1.613 and 0.708 for 1148770_g909
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1148770_g909.
Acceptable entries have no ID, XRT distances < 10", 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=299.5120 (19:58:02.88) DEC=35.0750 (+35:04:30.0)
XRT distances are as reported in catalog file.
-----------------
Entry 18 in the list of sources is a candidate afterglow for 1148770_g909 with genie
ra=299.48561 (19:57:56.55) dec=35.10340 (+35:06:12.3) +/- 0.7" mag=19.11+/-0.16
dist=470.7 REFID=13 major=1.7 minor=1.6 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 128.5 arc sec from the BAT position.
This source is near the edge of image (0.862)
Found 5 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
299.4917 35.1029 17.9 -1 USNO-B1 20.26 18.00 19.01
299.4895 35.1053 13.5 -1 USNO-B1 99.99 18.71 99.99
299.4859 35.0994 14.3 -1 USNO-B1 12.68 11.55 12.05 *
299.4819 35.1041 11.1 -1 USNO-B1 99.99 18.47 99.99
299.4809 35.1010 16.4 -1 USNO-B1 19.30 17.25 18.16
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" or brighter than 12 mag
List UVOT sources within 10" of the XRT position:
There are 99711.562 counts in the bkg source region of 5998.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 16.624 counts/pixel (5-sig UL in 4" is 19.79 mag) for 1148770_g909
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 20.34, XRT distances < 10",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1148770_695263379_230113d00h51m20s439463usUT_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(299.5174,35.1095,45")
fk5;-circle(299.509292821636,35.1187437534642,6")
fk5;-circle(299.528963965833,35.1037173151689,6")
fk5;-circle(299.508540230222,35.1049901188911,6")
image paragraph message for exposure 2 of trigger 1148770
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: overlap undefined
SRCLIST PROBLEM: overlap is unknown
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB230113 (Swift/BAT trigger 1148770) at 00:27:49 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 145 seconds with the White filter
starting 879 seconds after the BAT trigger. No credible afterglow candidate has
been found in the initial data products. The overlap of the sub-image and the
XRT error circle is uncertain. The overlap of the 8'x8' region for the list of
sources generated on-board and the XRT error circle is uncertain. No correction
has been made for the large, but uncertain, extinction expected.
------- notes for trigger 1148770 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 230113d00h51m21s853252usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1148770
-expid=695263379 -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/1148770/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for bat position. XRT position found for srclist.
XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 695263379.41806 or about 2023:013:00:42:54 UT
Found 3836 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 29% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 15 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 20 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 20.34 mag. Found 299 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
30% of the Genie image region. The closest srclist source has ra= 299.5726 dec=
35.1943 mag=17.57 sep=62.13". The closest Genie source has ra= 299.5267 dec=
35.1301 mag=17.22 sep=319.58".
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?
695263379 878 WHITE srclist found no candidates.
695263379 878 WHITE image found no candidates.
List afterglow candidates for other finding charts.
695263070 569 ? srclist data are not available.
695263070 569 WHITE image found no candidates.
------- Tokens for Quick GCN -------