image overlap message for exposure 1 of trigger 982707
uvot_overlap.pl vrs. 2010-12-20b fem started at 200717d05h33m19s647553usUT
The observation of trigger 982707 started 2020-07-16T22:59:40.0
Examining file ./982707_g117_uvot_sky_image.fits
The exposure ID is 616633179
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (196.0063,29.6435) with a roll angle of 283.9
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 (196.0130,29.6300) with a radius of 3.000 arc min
This is 0.881 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 (196.0103,29.6441) with a radius of 0.025 arc min
This is 0.214 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 1 of trigger 982707
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200717d05h33m25s078265usUT
Observation start time is 2020-07-16T22:59:40.0
Examining file ./982707_g117_uvot_catalog_image.fits
The exposure ID is 616633179
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 3 detected source(s) for 982707_g117
Aspect correction adds -0.00035 degrees (-0.085 sec of time = -1.10 arc sec) to RA
Aspect correction adds -0.00017 degrees (-0.62 arcsec) to Dec
Total aspect correction is 1.27 arcsec
Star catalogs centered at 196.0099 , 29.6404 with radius 2.00 arc min.
n_usno: 28 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 3 matched entries is 0.749" for 982707_g117
Mean and std. dev of mag. difference (MAG_DELTA) are -0.815 and 1.997 for 982707_g117
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 982707_g117.
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=196.0130 (13:04:03.12) DEC=29.6300 (+29:37:48.0)
XRT distances are from RA=196.0103 (13:04:02.47) DEC=29.6441 (+29:38:38.6)
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
196.0098 29.6446 2.3 -1 USNO-B1 20.32 19.39 19.81
The closest star is 2.31" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=196.01011 (13:04:02.43) dec=29.64460 (+29:38:40.6) +/- 0.7" mag=16.34+/-0.14 dist=2.0 REFID=3 flag=0
There are 53255.582 counts in the bkg source region of 6112.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 8.713 counts/pixel (5-sig UL in 4" is 20.17 mag) for 982707_g117
There are 5423.0293 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 27.115 counts/pixel for 982707_g117
There are 11003.523 counts in the xrt_bkg source region of 1245.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 8.838 counts/pixel (5-sig UL in 4" is 20.17 mag) for 982707_g117
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 20.73, 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: 982707_616633179_200717d05h33m25s078265usUT_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(196.0063,29.6435,45")
fk5;-circle(196.010110075732,29.6445983642219,6")
fk5;-circle(196.009297296509,29.6546666184314,6")
Region file: 982707_616633179_200717d05h33m25s078265usUT_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(196.01029,29.64406,8")
Region file: 982707_616633179_200717d05h33m25s078265usUT_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(196.01029,29.64406,25")
fk5;-circle(196.01029,29.64406,15")
image paragraph message for exposure 1 of trigger 982707
1 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB200716 (Swift/BAT trigger 982707) at 22:57:41 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 93 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
0.01.
------- notes for trigger 982707 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200717d05h33m29s173030usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=982707
-expid=616633179 -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/982707/
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 616633179.9794 or about 2020:198:22:59:34 UT
Found 148 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 3% of the srclist region. Found 17 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
19.22 mag.
Found 3 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. 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
20.73 mag. Found 24 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 4% of the Genie image region.
Genie image analysis:
Found 53255.6 counts in the large background region of 6112.0 pixels or a rate
of 8.713 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 20.17 mag. for a
4-arcsec aperture.
Found 5423.0 counts in the XRT position region of 200.0 pixels or a rate of
27.115 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 24.369 +/- 0.504 (1-sigma) cps or
16.31 mag and a range from 16.29 to 16.34 mag. The 3-sigma UL at the XRT
position is 25.880 cps or 16.25 mag.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 196.0100 dec= 29.6446 mag=17.01 sep=2.18".
The closest srclist source has ra= 196.0100 dec= 29.6446 mag=17.01 sep=2.18".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 196.0101 dec= 29.6446 mag=16.34 sep=2.02". The closest Genie
source has ra= 196.0101 dec= 29.6446 mag=16.34 sep=2.02".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 93 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 13:04:02.43 = 196.01011
DEC(J2000) = +29:38:40.6 = 29.64460
with a 90%-confidence error radius of about 0.75 arc sec. This position is 2.02
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.34 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.01.
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?
616633179 92 WHITE srclist found no candidates.
616633179 92 WHITE image found no candidates.
List afterglow candidates for other finding charts.
616633392 305 U srclist found no candidates.
616633392 305 U image found no candidates.
616633947 860 WHITE srclist found no candidates.
616633947 860 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 29.64406
GRB_ERROR: 5
GRB_RA: 196.01029
IMAGE_START_TIME: 22:59:34
MAGNITUDE: 16.2
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT