image overlap message for exposure 1 of trigger 903845
uvot_overlap.pl vrs. 2010-12-20b fem started at 190515d19h53m55s901304usUT
The observation of trigger 903845 started 2019-05-15T16:06:16.6
Examining file ./903845_g114_uvot_sky_image.fits
The exposure ID is 579629176
The exposure time is 149.846 (seconds)
The filter is WHITE.
*** Warning -- found 9993 null pixels in the image.
The uvot region is centered at (98.8418,52.3132) with a roll angle of 245.4
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 (98.8400,52.2950) with a radius of 3.000 arc min
This is 1.095 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 at most 5.34 sq. arc min or 0.19 of the BAT error circle
The XRT error circle is centered at (98.8477,52.3166) with a radius of 0.038 arc min
This is 0.298 arc min from the center of the uvot region
The area of the XRT error circle is 0.005 sq. arc min
The UVOT/XRT overlap is 0.005 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 903845
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190515d19h54m01s949513usUT
Observation start time is 2019-05-15T16:06:16.6
Examining file ./903845_g114_uvot_catalog_image.fits
The exposure ID is 579629176
The exposure is 149.846 sec.
The bin size is 2 pixels
The filter is WHITE
There are 6 detected source(s) for 903845_g114
Aspect correction adds -0.00073 degrees (-0.176 sec of time = -1.62 arc sec) to RA
Aspect correction adds -0.00044 degrees (-1.58 arcsec) to Dec
Total aspect correction is 2.26 arcsec
Star catalogs centered at 98.8470 , 52.3154 with radius 2.53 arc min.
n_usno: 91 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 6 matched entries is 0.445" for 903845_g114
Mean and std. dev of mag. difference (MAG_DELTA) are 0.711 and 0.186 for 903845_g114
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 903845_g114.
Acceptable entries have no ID, XRT distances < 5.75", 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=98.8400 (06:35:21.60) DEC=52.2950 (+52:17:42.0)
XRT distances are from RA=98.8477 (06:35:23.45) DEC=52.3166 (+52:18:59.9)
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 95899.961 counts in the bkg source region of 4352.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 22.036 counts/pixel (5-sig UL in 4" is 19.67 mag) for 903845_g114
There are 3870.9446 counts in the xrt source region of 169.00000 pixels.
Rate in xrt region with 8 arcsec radius is 22.905 counts/pixel for 903845_g114
There are 15456.285 counts in the xrt_bkg source region of 700.00000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 22.080 counts/pixel (5-sig UL in 4" is 19.67 mag) for 903845_g114
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 20.23, XRT distances < 5.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 903845_579629176_190515d19h54m01s949513usUT_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(98.8418,52.3132,45")
fk5;-circle(98.8458610198043,52.3138530251046,6")
fk5;-circle(98.8459033616792,52.3063115173662,6")
fk5;-circle(98.8392923162162,52.303262574692,6")
Region file: 903845_579629176_190515d19h54m01s949513usUT_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(98.84771,52.31664,8")
Region file: 903845_579629176_190515d19h54m01s949513usUT_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(98.84771,52.31664,25")
fk5;-circle(98.84771,52.31664,15")
fk5;-circle(98.8458610198043,52.3138530251046,6")
image paragraph message for exposure 1 of trigger 903845
------ Start for Possible Stand-alone Circular ----
In response to GRB190515 (Swift/BAT trigger 903845) at 16:04:21 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 92 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
0.09.
------- notes for trigger 903845 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190515d19h54m05s311389usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=903845
-expid=579629176 -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/903845/
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 579629176.62064 or about 2019:135:16:06:11 UT
Found 479 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 9% of the srclist region. Found 76 sources in
srclist catalog. Found 8 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 0 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 20.23 mag. Found 87 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 9% of the
Genie image region. The Genie image is INCOMPLETE with 9993 null pixels.
Genie image analysis:
Found 95900.0 counts in the large background region of 4352.0 pixels or a rate
of 22.036 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 19.67 mag. for a
4-arcsec aperture.
Found 3870.9 counts in the XRT position region of 169.0 pixels or a rate of
22.905 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.929 +/- 0.461 (1-sigma) cps or
19.86 mag and a range from 19.42 to 20.60 mag. The 3-sigma UL at the XRT
position is 2.310 cps or 18.87 mag. The closest srclist source has ra= 98.8458
dec= 52.3137 mag=16.86 sep=11.25". The closest Genie source has ra= 98.8459
dec= 52.3139 mag=16.36 sep=10.83".
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?
579629176 91 WHITE srclist found no candidates.
579629176 91 WHITE image found no candidates.
List afterglow candidates for other finding charts.
579629389 304 U srclist found no candidates.
579629389 304 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 52.31664
GRB_ERROR: 5.75
GRB_RA: 98.84771
IMAGE_START_TIME: 16:06:11
MAGNITUDE: 18.9
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT