image overlap message for exposure 1 of trigger 1246989
uvot_overlap.pl vrs. 2010-12-20b fem started at 240805d23h23m22s923736usUT
The observation of trigger 1246989 started 2024-08-05T14:30:56.0
Examining file ./1246989_g121_uvot_sky_image.fits
The exposure ID is 744561056
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (254.2078,18.3205) with a roll angle of 296.2
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 (254.2390,18.3230) with a radius of 3.000 arc min
This is 1.784 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 6.68 sq. arc min or 0.24 of the BAT error circle
The XRT error circle is centered at (254.2125,18.3196) with a radius of 0.052 arc min
This is 0.275 arc min from the center of the uvot region
The area of the XRT error circle is 0.008 sq. arc min
The UVOT/XRT overlap is 0.008 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1246989
find_uvot_ag.pl vrs. 2023-04-25a fem started at 240805d23h23m27s039029usUT
Observation start time is 2024-08-05T14:30:56.0
Examining file ./1246989_g121_uvot_catalog_image.fits
The exposure ID is 744561056
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 15 detected source(s) for 1246989_g121
Aspect correction adds -0.00232 degrees (-0.557 sec of time = -7.94 arc sec) to RA
Aspect correction adds 0.00111 degrees ( 4.00 arcsec) to Dec
Total aspect correction is 8.89 arcsec
Star catalogs centered at 254.2118 , 18.3203 with radius 2.51 arc min.
n_usno: 76 n_gsc: 73
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 11 matched entries is 0.398" for 1246989_g121
Mean and std. dev of mag. difference (MAG_DELTA) are 0.653 and 0.497 for 1246989_g121
Found 4 entries without IDs and 4 entries that are acceptable afterglow candidates for 1246989_g121.
Acceptable entries have no ID, XRT distances < 7.75", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
Magnitude criteria will be applied later.
BAT distances are from RA=254.2390 (16:56:57.36) DEC=18.3230 (+18:19:22.8)
XRT distances are from RA=254.2125 (16:56:51.01) DEC=18.3196 (+18:19:10.5)
*** WARNING 26 per cent of entries have no IDs.
-----------------
Entry 4 in the list of sources is a candidate afterglow for 1246989_g121 with genie
ra=254.22903 (16:56:54.97) dec=18.32328 (+18:19:23.8) +/- 0.7" mag=19.91+/-0.19
dist=57.9 REFID=11 major=3.2 minor=1.6 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 34.1 arc sec from the BAT position.
Found 6 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
254.2278 18.3272 14.7 -1 USNO-B1 14.12 11.79 12.82 *
254.2309 18.3228 6.5 -1 USNO-B1 21.01 19.78 20.33
254.2329 18.3271 18.9 -1 USNO-B1 99.99 19.69 99.99
254.2278 18.3272 14.6 -1 GSC2.3 11.77 12.85 12.31 *
254.2310 18.3228 7.1 -1 GSC2.3 19.63 20.45 99.99
254.2332 18.3271 19.8 -1 GSC2.3 19.99 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
-----------------
Entry 6 in the list of sources is a candidate afterglow for 1246989_g121 with genie
ra=254.23067 (16:56:55.36) dec=18.32349 (+18:19:24.5) +/- 0.7" mag=19.71+/-0.18
dist=63.5 REFID=10 major=2.9 minor=2.4 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 28.5 arc sec from the BAT position.
Found 6 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
254.2278 18.3272 16.5 -1 USNO-B1 14.12 11.79 12.82 *
254.2309 18.3228 2.6 -1 USNO-B1 21.01 19.78 20.33 *
254.2329 18.3271 14.9 -1 USNO-B1 99.99 19.69 99.99
254.2278 18.3272 16.4 -1 GSC2.3 11.77 12.85 12.31 *
254.2310 18.3228 2.8 -1 GSC2.3 19.63 20.45 99.99 *
254.2332 18.3271 15.6 -1 GSC2.3 19.99 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
-----------------
Entry 7 in the list of sources is a candidate afterglow for 1246989_g121 with genie
ra=254.22638 (16:56:54.33) dec=18.33058 (+18:19:50.1) +/- 0.7" mag=19.64+/-0.17
dist=61.7 REFID=5 major=2.4 minor=1.6 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 51.1 arc sec from the BAT position.
This source is near the edge of image (0.872)
Found 5 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
254.2226 18.3283 15.4 -1 USNO-B1 20.89 19.63 20.19
254.2237 18.3273 14.9 -1 USNO-B1 19.27 18.35 18.76
254.2278 18.3272 13.2 -1 USNO-B1 14.12 11.79 12.82 *
254.2238 18.3273 14.8 -1 GSC2.3 17.97 17.69 19.07
254.2278 18.3272 13.3 -1 GSC2.3 11.77 12.85 12.31 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" or brighter than 12 mag
-----------------
Entry 8 in the list of sources is a candidate afterglow for 1246989_g121 with genie
ra=254.23151 (16:56:55.56) dec=18.32661 (+18:19:35.8) +/- 1.0" mag=20.77+/-0.28
dist=69.6 REFID=9 major=0.9 minor=0.5 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 28.7 arc sec from the BAT position.
This source is near the edge of image (0.947)
Found 6 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
254.2278 18.3272 12.8 -1 USNO-B1 14.12 11.79 12.82 *
254.2309 18.3228 13.9 -1 USNO-B1 21.01 19.78 20.33
254.2329 18.3271 4.9 -1 USNO-B1 99.99 19.69 99.99 *
254.2278 18.3272 12.7 -1 GSC2.3 11.77 12.85 12.31 *
254.2310 18.3228 13.9 -1 GSC2.3 19.63 20.45 99.99
254.2332 18.3271 6.0 -1 GSC2.3 19.99 99.99 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" 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
254.2127 18.3215 7.0 -1 USNO-B1 99.99 20.00 99.99
The closest star is 6.96" away.
List UVOT sources within 10" of the XRT position:
There are 81210.203 counts in the bkg source region of 6099.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 13.315 counts/pixel (5-sig UL in 4" is 19.94 mag) for 1246989_g121
There are 2699.5901 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 13.431 counts/pixel for 1246989_g121
There are 15611.009 counts in the xrt_bkg source region of 1175.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 13.286 counts/pixel (5-sig UL in 4" is 19.95 mag) for 1246989_g121
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 20.50, XRT distances < 7.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1246989_744561056_240805d23h23m27s039029usUT_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(254.2078,18.3205,45")
fk5;-circle(254.213255690122,18.3261305730306,6")
fk5;-circle(254.209548786675,18.3114056453577,6")
Region file: 1246989_744561056_240805d23h23m27s039029usUT_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(254.21254,18.31958,8")
Region file: 1246989_744561056_240805d23h23m27s039029usUT_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(254.21254,18.31958,25")
fk5;-circle(254.21254,18.31958,15")
fk5;-circle(254.213255690122,18.3261305730306,6")
image paragraph message for exposure 1 of trigger 1246989
------ Start for Possible Stand-alone Circular ----
In response to GRB240805 (Swift/BAT trigger 1246989) at 14:28:54 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 87 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
0.088.
------- notes for trigger 1246989 ------
uvot_gcn_auto.pl vrs. 2023-03-28 fem at 240805d23h23m29s975817usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1246989
-expid=744561056 -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/1246989/
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 744561056.01726 or about 2024:218:14:30:51 UT
Found 522 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 9% of the srclist region. Found 81 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 15 source(s) in Genie image catalog. Found 4 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.50 mag. Found 73 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 81210.2 counts in the large background region of 6099.0 pixels or a rate
of 13.315 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 19.77 mag. for a
4-arcsec aperture.
Found 2699.6 counts in the XRT position region of 201.0 pixels or a rate of
13.431 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.194 +/- 0.375 (1-sigma) cps or
21.38 mag and a range from 20.22 to 99.99 mag. The 3-sigma UL at the XRT
position is 1.318 cps or 19.31 mag. The closest srclist source has ra= 254.2132
dec= 18.3262 mag=18.23 sep=23.98". The closest Genie source has ra= 254.2133
dec= 18.3261 mag=17.73 sep=23.71".
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?
744561056 87 WHITE srclist found no candidates.
744561056 87 WHITE image found no candidates.
List afterglow candidates for other finding charts.
744561268 299 U srclist found no candidates.
744561268 299 U image found no candidates.
744561846 877 WHITE srclist found no candidates.
744561846 877 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 18.31958
GRB_ERROR: 7.75
GRB_RA: 254.21254
IMAGE_START_TIME: 14:30:51
MAGNITUDE: 19.3
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT