image overlap message for exposure 2 of trigger 1227767
uvot_overlap.pl vrs. 2010-12-20b fem started at 240512d13h57m29s009211usUT
The observation of trigger 1227767 started 2024-05-11T18:12:49.0
Examining file ./1227767_g355_uvot_sky_image.fits
The exposure ID is 737143969
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (336.6781,8.5141) with a roll angle of 73.7
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 (336.6640,8.5140) with a radius of 3.000 arc min
This is 0.835 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 (336.6760,8.5127) with a radius of 0.040 arc min
This is 0.151 arc min from the center of the uvot region
The area of the XRT error circle is 0.005 sq. arc min
The UVOT/XRT overlap is 0.005 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1227767
find_uvot_ag.pl vrs. 2023-04-25a fem started at 240512d13h57m38s061346usUT
Observation start time is 2024-05-11T18:12:49.0
Examining file ./1227767_g355_uvot_catalog_image.fits
The exposure ID is 737143969
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 1 detected source(s) for 1227767_g355
Aspect correction adds 0.00185 degrees (0.444 sec of time = 6.59 arc sec) to RA
Aspect correction adds -0.00011 degrees (-0.40 arcsec) to Dec
Total aspect correction is 6.60 arcsec
Star catalogs centered at 336.6849 , 8.5220 with radius 2.00 arc min.
n_usno: 35 n_gsc: 30
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.3363
RA DEC Mag Color
bright star 0: 336.70586 (22:26:49.41) 8.50781 (+08:30:28.1) 11.34 USNO-V
Mean distance difference (CAT_DELTA) for 1 matched entries is 0.271" for 1227767_g355
Mean and std. dev of mag. difference (MAG_DELTA) are 0.747 and 0.000 for 1227767_g355
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1227767_g355.
Acceptable entries have no ID, XRT distances < 6", 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=336.6640 (22:26:39.36) DEC= 8.5140 (+08:30:50.4)
XRT distances are from RA=336.6760 (22:26:42.23) DEC= 8.5127 (+08:30:45.8)
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
336.6772 8.5107 8.5 -1 USNO-B1 20.31 17.60 18.80
336.6777 8.5105 10.0 -1 GSC2.3 19.74 22.40 99.99
The closest star is 8.47" away.
List UVOT sources within 10" of the XRT position:
There are 29176.559 counts in the bkg source region of 6319.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 4.617 counts/pixel (5-sig UL in 4" is 19.63 mag) for 1227767_g355
There are 890.25787 counts in the xrt source region of 196.00000 pixels.
Rate in xrt region with 8 arcsec radius is 4.542 counts/pixel for 1227767_g355
There are 5828.7603 counts in the xrt_bkg source region of 1251.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 4.659 counts/pixel (5-sig UL in 4" is 19.63 mag) for 1227767_g355
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 20.19, XRT distances < 6",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1227767_737143969_240512d13h57m38s061346usUT_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(336.6781,8.5141,45")
Region file: 1227767_737143969_240512d13h57m38s061346usUT_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(336.67596,8.51272,8")
Region file: 1227767_737143969_240512d13h57m38s061346usUT_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(336.67596,8.51272,25")
fk5;-circle(336.67596,8.51272,15")
image paragraph message for exposure 2 of trigger 1227767
------ Start for Possible Stand-alone Circular ----
In response to GRB240511 (Swift/BAT trigger 1227767) at 18:06:53 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
322 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 19.2 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 18.0 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.098.
------- notes for trigger 1227767 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 240512d13h57m41s206000usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1227767
-expid=737143969 -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/1227767/
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 737143969.0065 or about 2024:132:18:12:44 UT
Found 242 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 12 sources in
srclist catalog. Found 2 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.12 mag.
Found 1 source(s) in Genie image catalog. 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 20.19 mag. Found 31 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 5% of the
Genie image region.
Genie image analysis:
Found 29176.6 counts in the large background region of 6319.0 pixels or a rate
of 4.617 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 19.44 mag. for a
4-arcsec aperture.
Found 890.3 counts in the XRT position region of 196.0 pixels or a rate of
4.542 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.092 +/- 0.129 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.386 cps or 19.18 mag. The closest srclist
source has ra= 336.6918 dec= 8.5253 mag=18.21 sep=72.33". The closest Genie
source has ra= 336.6919 dec= 8.5252 mag=17.89 sep=72.40".
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?
737143969 322 U srclist found no candidates.
737143969 322 U image found no candidates.
List afterglow candidates for other finding charts.
737143757 110 WHITE srclist found no candidates.
737143757 110 WHITE image found no candidates.
737144521 874 WHITE srclist found no candidates.
737144521 874 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 8.51272
GRB_ERROR: 6
GRB_RA: 336.67596
IMAGE_START_TIME: 18:12:44
MAGNITUDE: 19.2
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT