image overlap message for exposure 1 of trigger 1118357
uvot_overlap.pl vrs. 2010-12-20b fem started at 220801d14h09m50s687915usUT
The observation of trigger 1118357 started 2022-07-30T15:51:16.0
Examining file ./1118357_g141_uvot_sky_image.fits
The exposure ID is 680889076
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (224.9980,-69.4984) with a roll angle of 271.9
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 (225.0210,-69.4970) with a radius of 3.000 arc min
This is 0.491 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 (225.0143,-69.4959) with a radius of 0.110 arc min
This is 0.373 arc min from the center of the uvot region
The area of the XRT error circle is 0.038 sq. arc min
The UVOT/XRT overlap is 0.038 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1118357
find_uvot_ag.pl vrs. 2020-10-30 fem started at 220801d14h09m55s257311usUT
Observation start time is 2022-07-30T15:51:16.0
Examining file ./1118357_g141_uvot_catalog_image.fits
The exposure ID is 680889076
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 69 detected source(s) for 1118357_g141
Aspect correction adds -0.00553 degrees (-1.327 sec of time = -6.98 arc sec) to RA
Aspect correction adds 0.00045 degrees ( 1.64 arcsec) to Dec
Total aspect correction is 7.16 arcsec
Star catalogs centered at 224.9998 , -69.4980 with radius 2.76 arc min.
n_usno: 418 n_gsc: 0
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 10.62934
RA DEC Mag Color
bright star 0: 225.08209 (15:00:19.70) -69.48644 (-69:29:11.2) 10.63 USNO-V
bright star 1: 224.90781 (14:59:37.87) -69.49775 (-69:29:51.9) 11.36 USNO-V
Mean distance difference (CAT_DELTA) for 70 matched entries is 0.621" for 1118357_g141
Mean and std. dev of mag. difference (MAG_DELTA) are 1.490 and 0.569 for 1118357_g141
Found 2 entries without IDs and 1 entries that are acceptable afterglow candidates for 1118357_g141.
Acceptable entries have no ID, XRT distances < 15", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
1 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=225.0210 (15:00:05.04) DEC=-69.4970 (-69:29:49.2)
XRT distances are from RA=225.0143 (15:00:03.43) DEC=-69.4959 (-69:29:45.4)
-----------------
Entry 17 in the list of sources is a candidate afterglow for 1118357_g141 with genie
ra=225.06213 (15:00:14.91) dec=-69.49542 (-69:29:43.5) +/- 0.6" mag=16.54+/-0.14
dist=60.3 REFID=29 major=1.6 minor=1.2 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 52.2 arc sec from the BAT position.
Found 12 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
225.0564 -69.4973 10.0 -1 USNO-B1 15.17 17.59 16.52
225.0578 -69.4966 7.0 -1 USNO-B1 18.27 18.00 18.12
225.0586 -69.4975 8.7 -1 USNO-B1 17.67 17.01 17.30
225.0601 -69.4979 9.2 -1 USNO-B1 17.50 17.56 17.53
225.0639 -69.4987 12.0 -1 USNO-B1 18.81 18.25 18.50
225.0633 -69.4949 2.4 -1 USNO-B1 15.07 14.37 14.68 *
225.0638 -69.4934 7.5 -1 USNO-B1 18.94 99.99 99.99
225.0622 -69.4912 15.1 -1 USNO-B1 18.04 17.73 17.87
225.0629 -69.4918 13.2 -1 USNO-B1 18.98 18.16 18.52
225.0654 -69.4941 6.2 -1 USNO-B1 18.03 14.47 16.05
225.0695 -69.4945 9.8 -1 USNO-B1 18.72 17.86 18.24
225.0732 -69.4966 14.7 -1 USNO-B1 17.24 16.69 16.93
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 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
225.0217 -69.4951 9.8 -1 USNO-B1 16.21 15.36 15.73
The closest star is 9.84" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=225.02169 (15:00:05.21) dec=-69.49513 (-69:29:42.5) +/- 0.6" mag=16.67+/-0.14 dist=9.8 REFID=30 flag=0
There are 48024.316 counts in the bkg source region of 4395.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 10.927 counts/pixel (5-sig UL in 4" is 20.05 mag) for 1118357_g141
There are 2251.0498 counts in the xrt source region of 198.00000 pixels.
Rate in xrt region with 8 arcsec radius is 11.369 counts/pixel for 1118357_g141
There are 8844.2227 counts in the xrt_bkg source region of 831.00000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 10.643 counts/pixel (5-sig UL in 4" is 20.07 mag) for 1118357_g141
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 20.61, XRT distances < 15",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1118357_680889076_220801d14h09m55s257311usUT_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(224.9980,-69.4984,45")
fk5;-circle(225.021693528148,-69.4951319503212,6")
fk5;-circle(225.017277982986,-69.5009808336511,6")
fk5;-circle(225.009072111871,-69.4984445660938,6")
fk5;-circle(225.034135076563,-69.5016113562255,6")
fk5;-circle(225.009410548045,-69.4913762947888,6")
fk5;-circle(225.000359514784,-69.498674965845,6")
fk5;-circle(224.999818233514,-69.4934646005821,6")
fk5;-circle(225.029753227865,-69.5064943734276,6")
fk5;-circle(225.008756227853,-69.4869908879038,6")
fk5;-circle(224.997446052182,-69.5046143636846,6")
fk5;-circle(224.993949855755,-69.4905655261053,6")
fk5;-circle(224.988561088268,-69.4952330447762,6")
fk5;-circle(225.023559163602,-69.5093320142397,6")
fk5;-circle(225.008027839079,-69.5092426078919,6")
fk5;-circle(224.980008526237,-69.5008004468089,6")
fk5;-circle(224.977526409462,-69.4966257566633,6")
fk5;-circle(224.979835421937,-69.4914365200106,6")
fk5;-circle(224.980870561216,-69.5041381919346,6")
fk5;-circle(224.981296657819,-69.5067640613698,6")
fk5;-circle(224.996841587218,-69.5125335040405,6")
fk5;-circle(224.969515912468,-69.4977827578571,6")
fk5;-circle(224.986933524462,-69.5116077803047,6")
fk5;-circle(224.966889976115,-69.4895146630758,6")
fk5;-circle(224.96232014182,-69.5026794653856,6")
Region file: 1118357_680889076_220801d14h09m55s257311usUT_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(225.01429,-69.49594,8")
Region file: 1118357_680889076_220801d14h09m55s257311usUT_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(225.01429,-69.49594,25")
fk5;-circle(225.01429,-69.49594,15")
fk5;-circle(225.021693528148,-69.4951319503212,6")
fk5;-circle(225.017277982986,-69.5009808336511,6")
fk5;-circle(225.009072111871,-69.4984445660938,6")
fk5;-circle(225.009410548045,-69.4913762947888,6")
fk5;-circle(225.000359514784,-69.498674965845,6")
fk5;-circle(224.999818233514,-69.4934646005821,6")
image paragraph message for exposure 1 of trigger 1118357
SRCLIST PROBLEM: srclist filled telemetry buffer
1 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB220730 (Swift/BAT trigger 1118357) at 15:48:54 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 111 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
0.161.
------- notes for trigger 1118357 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 220801d14h09m59s731707usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1118357
-expid=680889076 -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/1118357/
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 680889076.0109 or about 2022:211:15:51:11 UT
Found 1981 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 36% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 11 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 69 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 2 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.61 mag. Found 414 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 37% of the Genie image region.
Genie image analysis:
Found 48024.3 counts in the large background region of 4395.0 pixels or a rate
of 10.927 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 19.88 mag. for a
4-arcsec aperture.
Found 2251.0 counts in the XRT position region of 198.0 pixels or a rate of
11.369 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.958 +/- 0.350 (1-sigma) cps or
19.65 mag and a range from 19.31 to 20.14 mag. The 3-sigma UL at the XRT
position is 2.008 cps or 18.85 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.88 mag.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 225.0215 dec= -69.4952 mag=17.41 sep=9.44".
The closest srclist source has ra= 225.0215 dec= -69.4952 mag=17.41 sep=9.44".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 225.0217 dec= -69.4951 mag=16.67 sep=9.78". The closest Genie
source has ra= 225.0217 dec= -69.4951 mag=16.67 sep=9.78".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 111 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 15:00:05.21 = 225.02169
DEC(J2000) = -69:29:42.5 = -69.49513
with a 90%-confidence error radius of about 0.61 arc sec. This position is 9.78
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.67 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.161.
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?
680889076 111 WHITE srclist found no candidates.
680889076 111 WHITE image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -69.49594
GRB_ERROR: 15
GRB_RA: 225.01429
IMAGE_START_TIME: 15:51:11
MAGNITUDE: 18.9
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT