image overlap message for exposure 3 of trigger 965784
uvot_overlap.pl vrs. 2010-12-20b fem started at 200411d09h36m07s581061usUT
The observation of trigger 965784 started 2020-04-11T04:43:59.4
Examining file ./965784_g896_uvot_sky_image.fits
The exposure ID is 608273039
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (47.6644,-52.3030) with a roll angle of 329.7
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 (47.6590,-52.3140) with a radius of 3.000 arc min
This is 0.692 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 (47.6642,-52.3176) with a radius of 0.025 arc min
This is 0.881 arc min from the center of the uvot region
The area of the XRT error circle is 0.002 sq. arc min
The UVOT/XRT overlap is 0.002 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 3 of trigger 965784
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200411d09h36m20s127873usUT
Observation start time is 2020-04-11T04:43:59.4
Examining file ./965784_g896_uvot_catalog_image.fits
The exposure ID is 608273039
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 3 detected source(s) for 965784_g896
Aspect correction adds -0.00362 degrees (-0.868 sec of time = -7.96 arc sec) to RA
Aspect correction adds 0.00147 degrees ( 5.28 arcsec) to Dec
Total aspect correction is 9.56 arcsec
Star catalogs centered at 47.6657 , -52.3088 with radius 2.52 arc min.
n_usno: 59 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 1 matched entries is 0.312" for 965784_g896
Mean and std. dev of mag. difference (MAG_DELTA) are 0.449 and 0.000 for 965784_g896
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 965784_g896.
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.
Magnitude criteria will be applied later.
BAT distances are from RA=47.6590 (03:10:38.16) DEC=-52.3140 (-52:18:50.4)
XRT distances are from RA=47.6642 (03:10:39.40) DEC=-52.3176 (-52:19:03.5)
*** WARNING 66 per cent of entries have no IDs.
-----------------
Entry 1 in the list of sources is a candidate afterglow for 965784_g896 with genie
ra=47.63095 (03:10:31.43) dec=-52.32032 (-52:19:13.2) +/- 0.8" mag=18.81+/-0.15
dist=73.7 REFID=1 major=2.2 minor=1.1 flag=19 (neighbor+blended+aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 65.8 arc sec from the BAT position.
This source is near the edge of image (0.973)
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
47.6287 -52.3218 7.2 -1 USNO-B1 20.61 18.44 19.40
47.6265 -52.3217 11.0 -1 USNO-B1 21.83 18.03 19.72
47.6222 -52.3217 19.9 -1 USNO-B1 12.93 12.70 12.80
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 2.2
-----------------
Entry 2 in the list of sources is a candidate afterglow for 965784_g896 with genie
ra=47.63079 (03:10:31.39) dec=-52.32249 (-52:19:21.0) +/- 0.8" mag=18.65+/-0.15
dist=75.5 REFID=2 major=2.6 minor=1.7 flag=19 (neighbor+blended+aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 69.2 arc sec from the BAT position.
This source is near the edge of image (0.980)
Found 4 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
47.6287 -52.3218 5.4 -1 USNO-B1 20.61 18.44 19.40
47.6265 -52.3217 9.9 -1 USNO-B1 21.83 18.03 19.72
47.6222 -52.3217 19.1 -1 USNO-B1 12.93 12.70 12.80
47.6224 -52.3243 19.7 -1 USNO-B1 99.99 18.98 99.99
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 2.6
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 62377.656 counts in the bkg source region of 6192.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 10.074 counts/pixel (5-sig UL in 4" is 20.10 mag) for 965784_g896
There are 2029.3922 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 10.096 counts/pixel for 965784_g896
XRT source is too far (52.7064319215691") from center -- do not compute local background.
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 20.65, 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: 965784_608273039_200411d09h36m20s127873usUT_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(47.6644,-52.3030,45")
fk5;-circle(47.6709654816059,-52.3039906523492,6")
Region file: 965784_608273039_200411d09h36m20s127873usUT_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(47.66417,-52.31764,8")
image paragraph message for exposure 3 of trigger 965784
------ Start for Possible Stand-alone Circular ----
In response to GRB200411 (Swift/BAT trigger 965784) at 04:29:02 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 872 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
0.02.
------- notes for trigger 965784 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200411d09h36m24s073507usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=965784
-expid=608273039 -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/965784/
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 608273039.44142 or about 2020:102:04:43:54 UT
Found 787 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 40 sources in
srclist catalog. Found 4 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 3 source(s) in Genie image catalog. Found 2 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.65 mag. Found 55 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 6% of the
Genie image region.
Genie image analysis:
Found 62377.7 counts in the large background region of 6192.0 pixels or a rate
of 10.074 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 20.10 mag. for a
4-arcsec aperture.
Found 2029.4 counts in the XRT position region of 201.0 pixels or a rate of
10.097 counts/pixel in a radius of 8.0 arcsec. The net count rate (using large
background region) at the XRT position is 0.030 +/- 0.305 (1-sigma) cps or
23.58 mag and a range from 20.97 to 99.99 mag. The 3-sigma UL at the XRT
position is 0.946 cps or 19.84 mag. The closest srclist source has ra= 47.6711
dec= -52.3040 mag=16.97 sep=51.43". The closest Genie source has ra= 47.6710
dec= -52.3040 mag=16.00 sep=51.36".
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?
608273039 871 WHITE srclist found no candidates.
608273039 871 WHITE image found no candidates.
List afterglow candidates for other finding charts.
608272225 57 WHITE srclist found no candidates.
608272225 57 ? image data are not available.
608272437 269 ? srclist data are not available.
608272437 269 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -52.31764
GRB_ERROR: 5
GRB_RA: 47.66417
IMAGE_START_TIME: 04:43:54
MAGNITUDE: 19.8
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT