image overlap message for exposure 1 of trigger 887579
uvot_overlap.pl vrs. 2010-12-20b fem started at 190204d13h38m29s807123usUT
The observation of trigger 887579 started 2019-02-04T05:47:46.6
Examining file ./887579_g105_uvot_sky_image.fits
The exposure ID is 570952066
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (351.4791,54.8734) with a roll angle of 213.4
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 (351.5340,54.8830) with a radius of 3.000 arc min
This is 1.981 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 6.07 sq. arc min or 0.21 of the BAT error circle
The XRT error circle is centered at (351.4782,54.8764) with a radius of 0.025 arc min
This is 0.178 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 1 of trigger 887579
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190204d13h38m38s214871usUT
Observation start time is 2019-02-04T05:47:46.6
Examining file ./887579_g105_uvot_catalog_image.fits
The exposure ID is 570952066
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 46 detected source(s) for 887579_g105
Aspect correction adds -0.00104 degrees (-0.249 sec of time = -2.14 arc sec) to RA
Aspect correction adds -0.00037 degrees (-1.31 arcsec) to Dec
Total aspect correction is 2.52 arcsec
Star catalogs centered at 351.4786 , 54.8737 with radius 2.60 arc min.
n_usno: 320 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.71
RA DEC Mag Color
bright star 0: 351.47225 (23:25:53.34) 54.88890 (+54:53:20.0) 11.71 USNO-R
Mean distance difference (CAT_DELTA) for 52 matched entries is 0.554" for 887579_g105
Mean and std. dev of mag. difference (MAG_DELTA) are 1.019 and 0.647 for 887579_g105
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 887579_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.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=351.5340 (23:26:08.16) DEC=54.8830 (+54:52:58.8)
XRT distances are from RA=351.4782 (23:25:54.77) DEC=54.8764 (+54:52:34.9)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 887579_g105 with genie
ra=351.47703 (23:25:54.49) dec=54.87665 (+54:52:35.9) +/- 0.6" mag=16.23+/-0.14
dist=2.6 REFID=26 major=1.7 minor=1.1 flag=0
Found 5 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
351.4788 54.8718 17.9 -1 USNO-B1 18.76 17.98 18.33
351.4785 54.8713 19.4 -1 USNO-B1 99.99 18.60 99.99
351.4800 54.8771 6.4 -1 USNO-B1 19.90 18.66 19.21
351.4756 54.8774 4.0 -1 USNO-B1 17.64 16.75 17.15
351.4709 54.8758 13.1 -1 USNO-B1 20.39 18.55 19.37
*** unacceptable major profile of 1.7
Found 2 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
351.4800 54.8771 4.7 -1 USNO-B1 19.90 18.66 19.21
351.4756 54.8774 6.6 -1 USNO-B1 17.64 16.75 17.15
The closest star is 4.66" away.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=351.47703 (23:25:54.49) dec=54.87665 (+54:52:35.9) +/- 0.6" mag=16.23+/-0.14 dist=2.6 REFID=26 flag=0
There are 73274.281 counts in the bkg source region of 5419.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 13.522 counts/pixel (5-sig UL in 4" is 19.94 mag) for 887579_g105
There are 6282.8926 counts in the xrt source region of 198.00000 pixels.
Rate in xrt region with 8 arcsec radius is 31.732 counts/pixel for 887579_g105
There are 15697.326 counts in the xrt_bkg source region of 1146.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 13.697 counts/pixel (5-sig UL in 4" is 19.93 mag) for 887579_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 20.49, 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: 887579_570952066_190204d13h38m38s214871usUT_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(351.4791,54.8734,45")
fk5;-circle(351.477034229459,54.8766483518076,6")
fk5;-circle(351.478831584683,54.8718973714266,6")
fk5;-circle(351.49139260046,54.8760807957516,6")
fk5;-circle(351.475004227472,54.8866618291634,6")
fk5;-circle(351.492433116314,54.879615148353,6")
fk5;-circle(351.469796785211,54.8863504365981,6")
fk5;-circle(351.48054989264,54.8871068849933,6")
fk5;-circle(351.460216738249,54.8816445518132,6")
fk5;-circle(351.496854796768,54.8743319133141,6")
fk5;-circle(351.491532294617,54.8691134905758,6")
fk5;-circle(351.498593370208,54.8791395456651,6")
fk5;-circle(351.477439703035,54.8622612501621,6")
fk5;-circle(351.490139916256,54.8617341744225,6")
Region file: 887579_570952066_190204d13h38m38s214871usUT_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(351.47821,54.87636,8")
Region file: 887579_570952066_190204d13h38m38s214871usUT_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(351.47821,54.87636,25")
fk5;-circle(351.47821,54.87636,15")
fk5;-circle(351.478831584683,54.8718973714266,6")
fk5;-circle(351.49139260046,54.8760807957516,6")
image paragraph message for exposure 1 of trigger 887579
1 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB190204 (Swift/BAT trigger 887579) at 05:46:00 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. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 23:25:54.49 = 351.47704
DEC(J2000) = +54:52:35.3 = 54.87647
with a 90%-confidence error radius of about 1.10 arc sec. This position is 2.5
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.71. No correction has been made for the expected extinction corresponding to
E(B-V) of 0.38.
------- notes for trigger 887579 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190204d13h38m45s172157usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=887579
-expid=570952066 -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/887579/
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 570952066.62586 or about 2019:035:05:47:41 UT
Found 1865 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 31% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 7 srclist
source(s) without IDs. There are 1 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 19.22 mag.
Found 46 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. 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
20.49 mag. Found 316 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 32% of the Genie image region.
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 351.4770 dec= 54.8766 mag=16.23 sep=2.65". The closest Genie
source has ra= 351.4770 dec= 54.8766 mag=16.23 sep=2.65".
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?
570952066 82 WHITE 351.47704 54.87647 17.71/19.2 2.5 srclist Yes
570952066 82 WHITE image found no candidates.
List afterglow candidates for other finding charts.
570952278 294 U 351.47772 54.87631 18.21/18.1 1.1 srclist Yes
570952278 294 U 351.47742 54.87637 17.76/20.3 0.8 image Yes
570952857 873 WHITE srclist found no candidates.
570952857 873 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 54.87647
GRB_ERROR: 1.10
GRB_RA: 351.47704
IMAGE_START_TIME: 05:47:41
MAGNITUDE: 17.71
MAG_ERROR: 0.4
MESSAGE_TYPE: ACK
SOURCE: XRT