image overlap message for exposure 3 of trigger 1080859
uvot_overlap.pl vrs. 2010-12-20b fem started at 211024d06h46m02s105149usUT
The observation of trigger 1080859 started 2021-10-23T21:20:43.9
Examining file ./1080859_g890_uvot_sky_image.fits
The exposure ID is 656716843
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (170.3079,39.1342) with a roll angle of 136.6
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 (170.3020,39.1370) with a radius of 3.000 arc min
This is 0.323 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 (170.3087,39.1353) with a radius of 0.045 arc min
This is 0.080 arc min from the center of the uvot region
The area of the XRT error circle is 0.006 sq. arc min
The UVOT/XRT overlap is 0.006 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 3 of trigger 1080859
find_uvot_ag.pl vrs. 2020-10-30 fem started at 211024d06h46m18s992838usUT
Observation start time is 2021-10-23T21:20:43.9
Examining file ./1080859_g890_uvot_catalog_image.fits
The exposure ID is 656716843
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 2 detected source(s) for 1080859_g890
Aspect correction adds -0.00006 degrees (-0.015 sec of time = -0.18 arc sec) to RA
Aspect correction adds -0.00047 degrees (-1.69 arcsec) to Dec
Total aspect correction is 1.70 arcsec
Star catalogs centered at 170.2949 , 39.1361 with radius 2.08 arc min.
n_usno: 23 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 2 matched entries is 0.133" for 1080859_g890
Mean and std. dev of mag. difference (MAG_DELTA) are 0.755 and 0.141 for 1080859_g890
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1080859_g890.
Acceptable entries have no ID, XRT distances < 6.75", 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=170.3020 (11:21:12.48) DEC=39.1370 (+39:08:13.2)
XRT distances are from RA=170.3087 (11:21:14.09) DEC=39.1353 (+39:08:07.2)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 89849.180 counts in the bkg source region of 6202.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 14.487 counts/pixel (5-sig UL in 4" is 19.90 mag) for 1080859_g890
There are 3025.8345 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 15.054 counts/pixel for 1080859_g890
There are 17969.992 counts in the xrt_bkg source region of 1246.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 14.422 counts/pixel (5-sig UL in 4" is 19.90 mag) for 1080859_g890
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 20.45, XRT distances < 6.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1080859_656716843_211024d06h46m18s992838usUT_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(170.3079,39.1342,45")
fk5;-circle(170.301948568153,39.1437336829978,6")
Region file: 1080859_656716843_211024d06h46m18s992838usUT_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(170.30871,39.13533,8")
Region file: 1080859_656716843_211024d06h46m18s992838usUT_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(170.30871,39.13533,25")
fk5;-circle(170.30871,39.13533,15")
image paragraph message for exposure 3 of trigger 1080859
------ Start for Possible Stand-alone Circular ----
In response to GRB211023 (Swift/BAT trigger 1080859) at 21:05:52 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 863 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
0.024.
------- notes for trigger 1080859 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 211024d06h46m23s330937usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1080859
-expid=656716843 -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/1080859/
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 656716843.88792 or about 2021:296:21:20:38 UT
Found 438 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 3% of the srclist region. Found 67 sources in
srclist catalog. Found 34 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 2 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 20.45 mag. Found 19 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 3% of the
Genie image region.
Genie image analysis:
Found 89849.2 counts in the large background region of 6202.0 pixels or a rate
of 14.487 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 19.72 mag. for a
4-arcsec aperture.
Found 3025.8 counts in the XRT position region of 201.0 pixels or a rate of
15.054 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.846 +/- 0.394 (1-sigma) cps or
19.79 mag and a range from 19.37 to 20.47 mag. The 3-sigma UL at the XRT
position is 2.028 cps or 18.84 mag. The closest srclist source has ra= 170.3021
dec= 39.1436 mag=17.74 sep=35.06". The closest Genie source has ra= 170.3020
dec= 39.1437 mag=17.25 sep=35.66".
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?
656716843 862 WHITE srclist found no candidates.
656716843 862 WHITE image found no candidates.
List afterglow candidates for other finding charts.
656716077 96 WHITE srclist found no candidates.
656716077 96 WHITE 170.30963 39.13578 19.32/20.4 3.0 image Yes
656716290 309 U srclist found no candidates.
656716290 309 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 39.13533
GRB_ERROR: 6.75
GRB_RA: 170.30871
IMAGE_START_TIME: 21:20:38
MAGNITUDE: 18.8
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT