image overlap message for exposure 1 of trigger 974827
uvot_overlap.pl vrs. 2010-12-20b fem started at 200528d14h45m48s927114usUT
The observation of trigger 974827 started 2020-05-28T10:29:09.1
Examining file ./974827_g105_uvot_sky_image.fits
The exposure ID is 612354549
The exposure time is 149.669 (seconds)
The filter is WHITE.
The uvot region is centered at (176.6296,58.1924) with a roll angle of 298.7
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 (176.6370,58.1470) with a radius of 3.000 arc min
This is 2.732 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 4.00 sq. arc min or 0.14 of the BAT error circle
The XRT error circle is centered at (176.6375,58.1926) with a radius of 0.030 arc min
This is 0.250 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 974827
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200528d14h45m52s509800usUT
Observation start time is 2020-05-28T10:29:09.1
Examining file ./974827_g105_uvot_catalog_image.fits
The exposure ID is 612354549
The exposure is 149.669 sec.
The bin size is 2 pixels
The filter is WHITE
There are 6 detected source(s) for 974827_g105
Aspect correction adds -0.00209 degrees (-0.501 sec of time = -3.97 arc sec) to RA
Aspect correction adds 0.00104 degrees ( 3.75 arcsec) to Dec
Total aspect correction is 5.46 arcsec
Star catalogs centered at 176.6443 , 58.1935 with radius 2.60 arc min.
n_usno: 70 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.14188
RA DEC Mag Color
bright star 0: 176.62662 (11:46:30.39) 58.16832 (+58:10:05.9) 11.14 USNO-V
Mean distance difference (CAT_DELTA) for 5 matched entries is 0.453" for 974827_g105
Mean and std. dev of mag. difference (MAG_DELTA) are 1.220 and 0.627 for 974827_g105
Found 1 entries without IDs and 0 entries that are acceptable afterglow candidates for 974827_g105.
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.
1 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=176.6370 (11:46:32.88) DEC=58.1470 (+58:08:49.2)
XRT distances are from RA=176.6375 (11:46:32.99) DEC=58.1926 (+58:11:33.3)
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 3:
ra=176.62175 dec= 58.17170 +/- 0.6" mag=13.65+/-0.14 dist=80.9 REFID=1 flag=16
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 42640.008 counts in the bkg source region of 6309.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 6.759 counts/pixel (5-sig UL in 4" is 20.31 mag) for 974827_g105
There are 1351.1578 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 6.756 counts/pixel for 974827_g105
There are 8464.4355 counts in the xrt_bkg source region of 1241.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 6.821 counts/pixel (5-sig UL in 4" is 20.31 mag) for 974827_g105
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 20.87, 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: 974827_612354549_200528d14h45m52s509800usUT_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(176.6296,58.1924,45")
Region file: 974827_612354549_200528d14h45m52s509800usUT_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(176.63746,58.19258,8")
Region file: 974827_612354549_200528d14h45m52s509800usUT_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(176.63746,58.19258,25")
fk5;-circle(176.63746,58.19258,15")
image paragraph message for exposure 1 of trigger 974827
------ Start for Possible Stand-alone Circular ----
In response to GRB200528 (Swift/BAT trigger 974827) at 10:27:23 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 80 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 974827 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200528d14h45m56s076272usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=974827
-expid=612354549 -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/974827/
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 612354549.05764 or about 2020:149:10:29:04 UT
Found 337 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 61 sources in
srclist catalog. Found 39 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 6 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 20.87 mag. Found 66 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 42640.0 counts in the large background region of 6309.0 pixels or a rate
of 6.759 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 20.31 mag. for a
4-arcsec aperture.
Found 1351.2 counts in the XRT position region of 200.0 pixels or a rate of
6.756 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.086 +/- 0.264 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.793 cps or 20.03 mag. The closest srclist
source has ra= 176.6686 dec= 58.1931 mag=16.88 sep=59.14". The closest Genie
source has ra= 176.6685 dec= 58.1929 mag=16.22 sep=58.86".
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?
612354549 80 WHITE srclist found no candidates.
612354549 80 WHITE image found no candidates.
List afterglow candidates for other finding charts.
612354760 291 ? srclist data are not available.
612354760 291 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 58.19258
GRB_ERROR: 5
GRB_RA: 176.63746
IMAGE_START_TIME: 10:29:04
MAGNITUDE: 20.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT