image overlap message for exposure 1 of trigger 959431
uvot_overlap.pl vrs. 2010-12-20b fem started at 200303d07h28m52s503424usUT
The observation of trigger 959431 started 2020-03-03T02:36:58.1
Examining file ./959431_g120_uvot_sky_image.fits
The exposure ID is 604895818
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (212.7214,51.3637) with a roll angle of 59.2
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 (212.6980,51.3600) with a radius of 3.000 arc min
This is 0.905 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 (212.7190,51.3593) with a radius of 0.028 arc min
This is 0.281 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 959431
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200303d07h28m57s152341usUT
Observation start time is 2020-03-03T02:36:58.1
Examining file ./959431_g120_uvot_catalog_image.fits
The exposure ID is 604895818
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 8 detected source(s) for 959431_g120
Aspect correction adds 0.00079 degrees (0.190 sec of time = 1.78 arc sec) to RA
Aspect correction adds 0.00016 degrees ( 0.56 arcsec) to Dec
Total aspect correction is 1.86 arcsec
Star catalogs centered at 212.7155 , 51.3643 with radius 2.55 arc min.
n_usno: 41 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 7 matched entries is 1.016" for 959431_g120
Mean and std. dev of mag. difference (MAG_DELTA) are 0.864 and 0.444 for 959431_g120
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 959431_g120.
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=212.6980 (14:10:47.52) DEC=51.3600 (+51:21:36.0)
XRT distances are from RA=212.7190 (14:10:52.55) DEC=51.3593 (+51:21:33.5)
-----------------
Entry 7 in the list of sources is a candidate afterglow for 959431_g120 with genie
ra=212.68954 (14:10:45.49) dec=51.38450 (+51:23:04.2) +/- 1.3" mag=21.66+/-0.39
dist=112.2 REFID=2 major=0.8 minor=0.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 90.2 arc sec from the BAT position.
This source is near the edge of image (1.000)
Found 2 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
212.6877 51.3808 13.9 -1 USNO-B1 21.74 20.09 20.82
212.6900 51.3847 1.2 -1 USNO-B1 21.37 19.85 20.53 *
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 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 35905.414 counts in the bkg source region of 6253.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 5.742 counts/pixel (5-sig UL in 4" is 20.40 mag) for 959431_g120
There are 1188.5603 counts in the xrt source region of 199.00000 pixels.
Rate in xrt region with 8 arcsec radius is 5.973 counts/pixel for 959431_g120
There are 7043.8159 counts in the xrt_bkg source region of 1245.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 5.658 counts/pixel (5-sig UL in 4" is 20.41 mag) for 959431_g120
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 20.96, 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: 959431_604895818_200303d07h28m57s152341usUT_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(212.7214,51.3637,45")
fk5;-circle(212.716355123578,51.376268796377,6")
fk5;-circle(212.736149855263,51.3732319401375,6")
Region file: 959431_604895818_200303d07h28m57s152341usUT_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(212.71896,51.35931,8")
Region file: 959431_604895818_200303d07h28m57s152341usUT_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(212.71896,51.35931,25")
fk5;-circle(212.71896,51.35931,15")
image paragraph message for exposure 1 of trigger 959431
------ Start for Possible Stand-alone Circular ----
In response to GRB200303 (Swift/BAT trigger 959431) at 02:34:57 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 96 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 959431 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200303d07h29m00s742102usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=959431
-expid=604895818 -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/959431/
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 604895818.14634 or about 2020:063:02:36:53 UT
Found 136 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 3% of the srclist region. Found 9 sources in
srclist catalog. Found 3 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 8 source(s) in Genie image catalog. Found 1 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.96 mag. Found 37 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 35905.4 counts in the large background region of 6253.0 pixels or a rate
of 5.742 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 20.40 mag. for a
4-arcsec aperture.
Found 1188.6 counts in the XRT position region of 199.0 pixels or a rate of
5.973 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.418 +/- 0.247 (1-sigma) cps or
20.73 mag and a range from 20.22 to 21.69 mag. The 3-sigma UL at the XRT
position is 1.158 cps or 19.62 mag. The closest srclist source has ra= 212.7438
dec= 51.3590 mag=19.29 sep=55.73". The closest Genie source has ra= 212.7034
dec= 51.3502 mag=21.09 sep=47.99".
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?
604895818 96 WHITE srclist found no candidates.
604895818 96 WHITE image found no candidates.
List afterglow candidates for other finding charts.
604896030 308 U srclist found no candidates.
604896030 308 U image found no candidates.
604896585 863 WHITE srclist found no candidates.
604896585 863 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 51.35931
GRB_ERROR: 5
GRB_RA: 212.71896
IMAGE_START_TIME: 02:36:53
MAGNITUDE: 19.6
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT