image overlap message for exposure 2 of trigger 1236151
uvot_overlap.pl vrs. 2010-12-20b fem started at 260413d19h40m54s381084usUT
The observation of trigger 1236151 started 2024-06-10T07:51:49.3
Examining file 1236151_g912_uvot_sky_image.fits
The exposure ID is 739698709
The exposure time is 149.879 (seconds)
The filter is WHITE.
The uvot region is centered at (117.1256,-67.7507) with a roll angle of 325.2
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 (117.1750,-67.8040) with a radius of 3.000 arc min
This is 3.388 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 2.21 sq. arc min or 0.08 of the BAT error circle
The XRT error circle is centered at (117.1395,-67.7528) with a radius of 0.032 arc min
This is 0.339 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 2 of trigger 1236151
find_uvot_ag.pl vrs. 2023-04-25a fem started at 260413d19h40m55s136373usUT
Observation start time is 2024-06-10T07:51:49.3
Examining file 1236151_g912_uvot_catalog_image.fits
The exposure ID is 739698709
The exposure is 149.879 sec.
The bin size is 2 pixels
The filter is WHITE
There are 12 detected source(s) for 1236151_g912
Aspect correction adds -0.00112 degrees (-0.269 sec of time = -1.53 arc sec) to RA
Aspect correction adds 0.00076 degrees ( 2.73 arcsec) to Dec
Total aspect correction is 3.13 arcsec
Star catalogs centered at 117.1182 , -67.7547 with radius 2.24 arc min.
n_usno: 93 n_gsc: 81
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 10.36
RA DEC Mag Color
bright star 0: 117.12226 (07:48:29.34) -67.78542 (-67:47:07.5) 10.85 USNO-R
bright star 1: 117.12157 (07:48:29.18) -67.78876 (-67:47:19.5) 10.36 USNO-R
Mean distance difference (CAT_DELTA) for 12 matched entries is 0.361" for 1236151_g912
Mean and std. dev of mag. difference (MAG_DELTA) are 1.091 and 0.366 for 1236151_g912
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1236151_g912.
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=117.1750 (07:48:42.00) DEC=-67.8040 (-67:48:14.4)
XRT distances are from RA=117.1395 (07:48:33.48) DEC=-67.7528 (-67:45:10.1)
Found 2 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
117.1405 -67.7521 2.7 -1 USNO-B1 99.99 16.43 99.99
117.1404 -67.7521 2.9 -1 GSC2.3 17.11 99.99 99.99
The closest star is 2.73" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=117.14058 (07:48:33.74) dec=-67.75216 (-67:45:07.8) +/- 0.6" mag=16.75+/-0.14 dist=2.8 REFID=7 flag=0
There are 66500.680 counts in the bkg source region of 5959.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 11.160 counts/pixel (5-sig UL in 4" is 20.04 mag) for 1236151_g912
There are 4836.6143 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 24.063 counts/pixel for 1236151_g912
There are 14095.699 counts in the xrt_bkg source region of 1246.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 11.313 counts/pixel (5-sig UL in 4" is 20.03 mag) for 1236151_g912
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 20.59, 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: 1236151_739698709_260413d19h40m55s136373usUT_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(117.1256,-67.7507,45")
fk5;-circle(117.140577572159,-67.7521623754577,6")
fk5;-circle(117.137494064779,-67.7622924442854,6")
fk5;-circle(117.15894496533,-67.7467762623972,6")
fk5;-circle(117.115874528822,-67.750119801104,6")
fk5;-circle(117.149216598278,-67.7415619412538,6")
Region file: 1236151_739698709_260413d19h40m55s136373usUT_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(117.13950,-67.75281,8")
Region file: 1236151_739698709_260413d19h40m55s136373usUT_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(117.13950,-67.75281,25")
fk5;-circle(117.13950,-67.75281,15")
image paragraph message for exposure 2 of trigger 1236151
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 GRB240610 (Swift/BAT trigger 1236151) at 07:36:36 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 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 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
0.126.
------- notes for trigger 1236151 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 260413d19h40m56s338442usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1236151
-expid=739698709 -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/1236151/
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.
*** Warning -- BAT and XRT error circles do NOT overlap.
UVOT exposure began at MET 739698709.25668 or about 2024:162:07:51:44 UT
Found 2285 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 18% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 14 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 12 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. 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
20.59 mag. Found 89 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 12% of the Genie image region.
Genie image analysis:
Found 66500.7 counts in the large background region of 5959.0 pixels or a rate
of 11.160 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 19.87 mag. for a
4-arcsec aperture.
Found 4836.6 counts in the XRT position region of 201.0 pixels or a rate of
24.063 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 17.085 +/- 0.481 (1-sigma) cps or
16.52 mag and a range from 16.49 to 16.55 mag. The 3-sigma UL at the XRT
position is 18.528 cps or 16.44 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 19.35 mag.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 117.1406 dec= -67.7523 mag=17.22 sep=2.46".
The closest srclist source has ra= 117.1406 dec= -67.7523 mag=17.22 sep=2.46".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 117.1406 dec= -67.7522 mag=16.75 sep=2.76". The closest Genie
source has ra= 117.1406 dec= -67.7522 mag=16.75 sep=2.76".
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 879 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 07:48:33.74 = 117.14058
DEC(J2000) = -67:45:07.8 = -67.75216
with a 90%-confidence error radius of about 0.61 arc sec. This position is 2.76
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.75 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.126.
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?
739698709 878 WHITE srclist found no candidates.
739698709 878 WHITE image found no candidates.
List afterglow candidates for other finding charts.
739697918 87 WHITE srclist found no candidates.
739697918 87 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -67.75281
GRB_ERROR: 5
GRB_RA: 117.13950
IMAGE_START_TIME: 07:51:44
MAGNITUDE: 16.4
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT