image overlap message for exposure 3 of trigger 1120270
uvot_overlap.pl vrs. 2010-12-20b fem started at 220814d02h21m20s519661usUT
The observation of trigger 1120270 started 2022-08-13T19:37:53.7
Examining file ./1120270_g889_uvot_sky_image.fits
The exposure ID is 682112273
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (81.5340,-33.0125) with a roll angle of 61.8
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 (81.5010,-32.9850) with a radius of 3.000 arc min
This is 2.342 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 5.26 sq. arc min or 0.19 of the BAT error circle
The XRT error circle is centered at (81.5315,-33.0169) with a radius of 0.033 arc min
This is 0.292 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 1120270
find_uvot_ag.pl vrs. 2020-10-30 fem started at 220814d02h21m40s394473usUT
Observation start time is 2022-08-13T19:37:53.7
Examining file ./1120270_g889_uvot_catalog_image.fits
The exposure ID is 682112273
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 6 detected source(s) for 1120270_g889
Aspect correction adds 0.00110 degrees (0.263 sec of time = 3.31 arc sec) to RA
Aspect correction adds 0.00049 degrees ( 1.76 arcsec) to Dec
Total aspect correction is 3.75 arcsec
Star catalogs centered at 81.5324 , -33.0162 with radius 2.36 arc min.
n_usno: 69 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.37116
RA DEC Mag Color
bright star 0: 81.57783 (05:26:18.68) -33.01153 (-33:00:41.5) 11.37 USNO-V
Mean distance difference (CAT_DELTA) for 5 matched entries is 0.306" for 1120270_g889
Mean and std. dev of mag. difference (MAG_DELTA) are 1.230 and 0.571 for 1120270_g889
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1120270_g889.
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.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=81.5010 (05:26:00.24) DEC=-32.9850 (-32:59:06.0)
XRT distances are from RA=81.5315 (05:26:07.55) DEC=-33.0169 (-33:01:00.8)
-----------------
Entry 2 in the list of sources is a candidate afterglow for 1120270_g889 with genie
ra=81.52080 (05:26:04.99) dec=-32.99784 (-32:59:52.2) +/- 0.6" mag=17.48+/-0.14
dist=75.7 REFID=2 major=2.1 minor=2.0 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 75.6 arc sec from the BAT position.
Found 4 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
81.5202 -32.9988 3.9 -1 USNO-B1 20.33 20.72 20.55
81.5211 -32.9978 0.9 -1 USNO-B1 13.97 14.93 14.50 *
81.5198 -32.9975 3.3 -1 USNO-B1 18.55 19.45 19.05 *
81.5207 -32.9965 4.7 -1 USNO-B1 19.07 99.99 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 78005.836 counts in the bkg source region of 6207.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 12.567 counts/pixel (5-sig UL in 4" is 19.98 mag) for 1120270_g889
There are 2632.3208 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 13.096 counts/pixel for 1120270_g889
There are 15351.588 counts in the xrt_bkg source region of 1245.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 12.331 counts/pixel (5-sig UL in 4" is 19.99 mag) for 1120270_g889
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 20.53, 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: 1120270_682112273_220814d02h21m40s394473usUT_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(81.5340,-33.0125,45")
fk5;-circle(81.5354422897565,-33.0020162399703,6")
Region file: 1120270_682112273_220814d02h21m40s394473usUT_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(81.53146,-33.01689,8")
Region file: 1120270_682112273_220814d02h21m40s394473usUT_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(81.53146,-33.01689,25")
fk5;-circle(81.53146,-33.01689,15")
image paragraph message for exposure 3 of trigger 1120270
SRCLIST PROBLEM: srclist filled telemetry buffer
------ Start for Possible Stand-alone Circular ----
In response to GRB220813 (Swift/BAT trigger 1120270) at 19:23:03 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 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
0.022.
------- notes for trigger 1120270 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 220814d02h21m44s417435usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1120270
-expid=682112273 -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/1120270/
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 682112273.73456 or about 2022:225:19:37:48 UT
Found 1084 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 9% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 93 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 20.53 mag. Found 65 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 78005.8 counts in the large background region of 6207.0 pixels or a rate
of 12.567 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 19.80 mag. for a
4-arcsec aperture.
Found 2632.3 counts in the XRT position region of 201.0 pixels or a rate of
13.096 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 1.026 +/- 0.367 (1-sigma) cps or
19.58 mag and a range from 19.25 to 20.06 mag. The 3-sigma UL at the XRT
position is 2.127 cps or 18.79 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 19.42 mag. The closest
srclist source has ra= 81.5355 dec= -33.0021 mag=15.75 sep=54.50". The closest
Genie source has ra= 81.5354 dec= -33.0020 mag=15.11 sep=54.88".
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?
682112273 859 WHITE srclist found no candidates.
682112273 859 WHITE image found no candidates.
List afterglow candidates for other finding charts.
682111513 99 WHITE 81.53153 -33.01664 19.90/19.2 0.9 srclist Yes
682111513 99 WHITE 81.53155 -33.01636 19.61/20.7 1.9 image Yes
682111671 257 U srclist found no candidates.
682111671 257 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -33.01689
GRB_ERROR: 5
GRB_RA: 81.53146
IMAGE_START_TIME: 19:37:48
MAGNITUDE: 18.8
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT