image overlap message for exposure 2 of trigger 965484
uvot_overlap.pl vrs. 2010-12-20b fem started at 200409d08h51m38s738596usUT
The observation of trigger 965484 started 2020-04-09T03:25:15.8
Examining file ./965484_g315_uvot_sky_image.fits
The exposure ID is 608095515
The exposure time is 249.946 (seconds)
The filter is U.
*** Warning -- found 1352 null pixels in the image.
The uvot region is centered at (60.5446,-50.2460) with a roll angle of 314.2
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 (60.5530,-50.2470) with a radius of 3.000 arc min
This is 0.327 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 (60.5363,-50.2250) with a radius of 0.027 arc min
This is 1.300 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 2 of trigger 965484
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200409d08h51m50s434687usUT
Observation start time is 2020-04-09T03:25:15.8
Examining file ./965484_g315_uvot_catalog_image.fits
The exposure ID is 608095515
The exposure is 249.946 sec.
The bin size is 2 pixels
The filter is U
There are 4 detected source(s) for 965484_g315
Aspect correction adds -0.00222 degrees (-0.532 sec of time = -5.10 arc sec) to RA
Aspect correction adds 0.00078 degrees ( 2.80 arcsec) to Dec
Total aspect correction is 5.82 arcsec
Star catalogs centered at 60.5604 , -50.2461 with radius 2.17 arc min.
n_usno: 31 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 4 matched entries is 0.674" for 965484_g315
Mean and std. dev of mag. difference (MAG_DELTA) are 1.181 and 1.186 for 965484_g315
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 965484_g315.
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=60.5530 (04:02:12.72) DEC=-50.2470 (-50:14:49.2)
XRT distances are from RA=60.5363 (04:02:08.72) DEC=-50.2250 (-50:13:29.9)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 10123.216 counts in the bkg source region of 6206.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 1.631 counts/pixel (5-sig UL in 4" is 20.20 mag) for 965484_g315
There are 170.68991 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 0.853 counts/pixel for 965484_g315
XRT source is too far (78.0652539148553") 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 20.75, 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: 965484_608095515_200409d08h51m50s434687usUT_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(60.5446,-50.2460,45")
fk5;-circle(60.5373907773468,-50.2547445233239,6")
Region file: 965484_608095515_200409d08h51m50s434687usUT_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(60.53633,-50.22497,8")
image paragraph message for exposure 2 of trigger 965484
------ Start for Possible Stand-alone Circular ----
In response to GRB200409 (Swift/BAT trigger 965484) at 03:19:59 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
291 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 19.2 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 18.0 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.01.
------- notes for trigger 965484 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200409d08h51m54s286871usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=965484
-expid=608095515 -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/965484/
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 608095515.78764 or about 2020:100:03:25:10 UT
Found 519 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 93 sources in
srclist catalog. Found 43 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.12 mag.
Found 4 source(s) in Genie image catalog. 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 20.75 mag. Found 27 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 3% of the
Genie image region. The Genie image is INCOMPLETE with 1352 null pixels.
Genie image analysis:
Found 10123.2 counts in the large background region of 6206.0 pixels or a rate
of 1.631 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 20.24 mag. for a
4-arcsec aperture.
Found 170.7 counts in the XRT position region of 200.0 pixels or a rate of
0.853 counts/pixel in a radius of 8.0 arcsec. The net count rate (using large
background region) at the XRT position is -0.622 +/- 0.054 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.162 cps or 20.36 mag. The closest srclist
source has ra= 60.5495 dec= -50.2171 mag=16.66 sep=41.63". The closest Genie
source has ra= 60.5374 dec= -50.2547 mag=18.57 sep=107.22".
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?
608095515 290 U srclist found no candidates.
608095515 290 U image found no candidates.
List afterglow candidates for other finding charts.
608095302 77 WHITE 60.53629 -50.22454 19.32/19.2 1.6 srclist Yes
608095302 77 WHITE 60.53646 -50.22455 19.14/20.8 1.5 image Yes
608096093 868 ? srclist data are not available.
608096093 868 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -50.22497
GRB_ERROR: 5
GRB_RA: 60.53633
IMAGE_START_TIME: 03:25:10
MAGNITUDE: 20.4
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT