srclist overlap message for exposure 3 of trigger 1227767
uvot_overlap.pl vrs. 2010-12-20b fem started at 240512d13h57m27s781027usUT
The observation of trigger 1227767 started 2024-05-11T18:22:01.8
Examining file ./1227767_g907_uvot_sky_srclist.fits
The exposure ID is 737144521
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (336.6792,8.5137) with a roll angle of 73.7
It is square with sides of 12.05 arc min. for an area of 145.15 sq arc min
The BAT error circle is centered at (336.6640,8.5140) with a radius of 3.000 arc min
This is 0.899 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 28.27 sq. arc min or 1.00 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 0.199 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
srclist afterglow message for exposure 3 of trigger 1227767
find_uvot_ag.pl vrs. 2023-04-25a fem started at 240512d13h57m43s407888usUT
Observation start time is 2024-05-11T18:22:01.8
Examining file ./1227767_g907_uvot_catalog_srclist.fits
The exposure ID is 737144521
The exposure is 149.846 sec.
The bin size is 2 pixels
The filter is WHITE
There are 54 detected source(s) for 1227767_g907
Aspect correction adds 0.00194 degrees (0.466 sec of time = 6.92 arc sec) to RA
Aspect correction adds -0.00019 degrees (-0.69 arcsec) to Dec
Total aspect correction is 6.95 arcsec
Star catalogs centered at 336.6813 , 8.5116 with radius 8.41 arc min.
n_usno: 625 n_gsc: 554
*** 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 43 matched entries is 0.658" for 1227767_g907
Mean and std. dev of mag. difference (MAG_DELTA) are 1.496 and 0.561 for 1227767_g907
Found 12 entries without IDs and 2 entries that are acceptable afterglow candidates for 1227767_g907.
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.
6 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)
-----------------
Entry 7 in the list of sources is a candidate afterglow for 1227767_g907 with 3x3 stamp
ra=336.70068 (22:26:48.16) dec=8.52996 (+08:31:47.8) +/- 1.1" mag=19.84+/-0.35
dist=107.7 REFID=50
*** The position of this source is inconsistent with the XRT position.
The position is 139.4 arc sec from the BAT position.
src: 7 distr. of nearby unmatched sources: 0 0 0 0 0
Found 3 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
336.7035 8.5300 10.0 -1 USNO-B1 20.19 19.68 19.90
336.7033 8.5285 10.9 -1 GSC2.3 99.99 21.92 99.99
336.7033 8.5337 16.3 -1 GSC2.3 19.75 22.15 99.99
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 12 in the list of sources is a candidate afterglow for 1227767_g907 with 3x3 stamp
ra=336.65605 (22:26:37.45) dec=8.54127 (+08:32:28.6) +/- 1.1" mag=19.06+/-0.35
dist=124.8 REFID=41
*** The position of this source is inconsistent with the XRT position.
The position is 103.2 arc sec from the BAT position.
src: 12 srclist_match has ID
src: 12 distr. of nearby unmatched sources: 0 0 0 0 0
Found 3 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
336.6558 8.5405 2.9 -1 USNO-B1 16.41 14.34 15.26 *
336.6558 8.5404 3.2 -1 GSC2.3 14.89 16.26 15.46 *
336.6561 8.5413 0.2 -1 GSC2.3 99.99 99.99 99.99 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
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:
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.22, XRT distances < 6",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
srclist paragraph message for exposure 3 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 150 seconds with the White filter
starting 875 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
0.098.
------- notes for trigger 1227767 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 240512d13h57m45s962798usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1227767
-expid=737144521 -meonly -msg_srclist
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 737144521.78872 or about 2024:132:18:21:56 UT
Found 621 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 54 sources in
srclist catalog. Found 12 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 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 20.38 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 103942.6 counts in the large background region of 6319.0 pixels or a rate
of 16.449 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 19.65 mag. for a
4-arcsec aperture.
Found 3222.5 counts in the XRT position region of 199.0 pixels or a rate of
16.193 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.274 +/- 0.408 (1-sigma) cps. The
3-sigma UL at the XRT position is 1.224 cps or 19.39 mag. The closest srclist
source has ra= 336.6919 dec= 8.5254 mag=18.17 sep=72.72". The closest Genie
source has ra= 336.6918 dec= 8.5253 mag=17.72 sep=72.20".
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?
737144521 874 WHITE srclist found no candidates.
737144521 874 WHITE 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.
737143969 322 U srclist found no candidates.
737143969 322 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 8.51272
GRB_ERROR: 6
GRB_RA: 336.67596
IMAGE_START_TIME: 18:21:56
MAGNITUDE: 19.4
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT