image overlap message for exposure 1 of trigger 995004
uvot_overlap.pl vrs. 2010-12-20b fem started at 200908d00h37m01s201220usUT
The observation of trigger 995004 started 2020-09-07T18:53:00.4
Examining file ./995004_g108_uvot_sky_image.fits
The exposure ID is 621197580
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (89.0176,6.9119) with a roll angle of 85.7
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 (89.0130,6.9110) with a radius of 3.000 arc min
This is 0.281 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 (89.0290,6.9062) with a radius of 0.030 arc min
This is 0.758 arc min from the center of the uvot region
The area of the XRT error circle is 0.003 sq. arc min
The UVOT/XRT overlap is 0.003 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 995004
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200908d00h37m08s615806usUT
Observation start time is 2020-09-07T18:53:00.4
Examining file ./995004_g108_uvot_catalog_image.fits
The exposure ID is 621197580
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 15 detected source(s) for 995004_g108
Aspect correction adds 0.00142 degrees (0.342 sec of time = 5.09 arc sec) to RA
Aspect correction adds -0.00108 degrees (-3.87 arcsec) to Dec
Total aspect correction is 6.40 arcsec
Star catalogs centered at 89.0193 , 6.9088 with radius 2.73 arc min.
n_usno: 241 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 15 matched entries is 0.603" for 995004_g108
Mean and std. dev of mag. difference (MAG_DELTA) are 0.746 and 0.349 for 995004_g108
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 995004_g108.
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=89.0130 (05:56:03.12) DEC= 6.9110 (+06:54:39.6)
XRT distances are from RA=89.0290 (05:56:06.97) DEC= 6.9062 (+06:54:22.5)
-----------------
Entry 6 in the list of sources is a candidate afterglow for 995004_g108 with genie
ra=88.99970 (05:55:59.93) dec=6.92130 (+06:55:16.7) +/- 1.2" mag=20.85+/-0.37
dist=118.0 REFID=4 major=0.8 minor=0.7 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 60.3 arc sec from the BAT position.
This source is near the edge of image (0.914)
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
89.0017 6.9257 17.4 -1 USNO-B1 20.71 19.64 20.12
89.0007 6.9260 17.4 -1 USNO-B1 20.13 19.18 19.60
88.9949 6.9220 17.4 -1 USNO-B1 18.80 16.96 17.78
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 11 in the list of sources is a candidate afterglow for 995004_g108 with genie
ra=89.03680 (05:56:08.83) dec=6.91046 (+06:54:37.7) +/- 0.6" mag=18.80+/-0.16
dist=31.6 REFID=11 major=2.9 minor=1.5 flag=2 (blended)
*** The position of this source is inconsistent with the XRT position.
The position is 85.1 arc sec from the BAT position.
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
89.0357 6.9134 11.1 -1 USNO-B1 99.99 19.46 99.99
89.0362 6.9133 10.3 -1 USNO-B1 99.99 19.64 99.99
89.0401 6.9083 14.2 -1 USNO-B1 20.27 19.06 19.60
89.0399 6.9130 14.5 -1 USNO-B1 14.70 11.89 13.14 *
89.0406 6.9130 16.3 -1 USNO-B1 13.24 12.84 13.02
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" 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
89.0293 6.9037 9.1 -1 USNO-B1 99.99 20.52 99.99
The closest star is 9.09" away.
List UVOT sources within 10" of the XRT position:
There are 1.2371100E+05 counts in the bkg source region of 5911.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 20.929 counts/pixel (5-sig UL in 4" is 19.70 mag) for 995004_g108
There are 4261.5000 counts in the xrt source region of 203.00000 pixels.
Rate in xrt region with 8 arcsec radius is 20.993 counts/pixel for 995004_g108
There are 22476.613 counts in the xrt_bkg source region of 1090.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 20.621 counts/pixel (5-sig UL in 4" is 19.71 mag) for 995004_g108
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.25, 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: 995004_621197580_200908d00h37m08s615806usUT_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(89.0176,6.9119,45")
fk5;-circle(89.0199401328259,6.91523589061405,6")
fk5;-circle(89.0164094590985,6.91888726950228,6")
fk5;-circle(89.0239789244671,6.90315775762408,6")
fk5;-circle(89.0300348552064,6.91291529667971,6")
Region file: 995004_621197580_200908d00h37m08s615806usUT_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(89.02904,6.90625,8")
Region file: 995004_621197580_200908d00h37m08s615806usUT_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(89.02904,6.90625,25")
fk5;-circle(89.02904,6.90625,15")
fk5;-circle(89.0239789244671,6.90315775762408,6")
fk5;-circle(89.0300348552064,6.91291529667971,6")
image paragraph message for exposure 1 of trigger 995004
------ Start for Possible Stand-alone Circular ----
In response to GRB200907 (Swift/BAT trigger 995004) at 18:51:11 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 83 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
0.61.
------- notes for trigger 995004 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200908d00h37m12s578470usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=995004
-expid=621197580 -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/995004/
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 621197580.38096 or about 2020:251:18:52:55 UT
Found 1197 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 19% of the srclist region. Found 80 sources in
srclist catalog. Found 6 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 2 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.25 mag. Found 237 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
22% of the Genie image region.
Genie image analysis:
Found 123711.0 counts in the large background region of 5911.0 pixels or a rate
of 20.929 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 19.70 mag. for a
4-arcsec aperture.
Found 4261.5 counts in the XRT position region of 203.0 pixels or a rate of
20.993 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.503 +/- 0.473 (1-sigma) cps or
20.53 mag and a range from 19.81 to 23.59 mag. The 3-sigma UL at the XRT
position is 1.923 cps or 19.07 mag. The closest srclist source has ra= 89.0301
dec= 6.9128 mag=18.26 sep=23.87". The closest Genie source has ra= 89.0240
dec= 6.9032 mag=19.64 sep=21.24".
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?
621197580 83 WHITE srclist found no candidates.
621197580 83 WHITE image found no candidates.
List afterglow candidates for other finding charts.
621197792 295 U srclist found no candidates.
621197792 295 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 6.90625
GRB_ERROR: 5
GRB_RA: 89.02904
IMAGE_START_TIME: 18:52:55
MAGNITUDE: 19.1
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT