image overlap message for exposure 2 of trigger 889483
uvot_overlap.pl vrs. 2010-12-20b fem started at 190218d09h29m14s580548usUT
The observation of trigger 889483 started 2019-02-18T09:09:09.3
Examining file 889483_g899_uvot_sky_image.fits
The exposure ID is 572173749
The exposure time is 129.367 (seconds)
The filter is WHITE.
*** Warning -- found 20186 null pixels in the image.
The uvot region is centered at (284.6484,-8.2380) with a roll angle of 98.3
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 (284.6400,-8.2350) with a radius of 3.000 arc min
This is 0.528 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 (284.6439,-8.2374) with a radius of 0.065 arc min
This is 0.268 arc min from the center of the uvot region
The area of the XRT error circle is 0.013 sq. arc min
The UVOT/XRT overlap is 0.00 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 889483
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190218d09h29m16s402337usUT
Observation start time is 2019-02-18T09:09:09.3
Examining file 889483_g899_uvot_catalog_image.fits
The exposure ID is 572173749
The exposure is 129.367 sec.
The bin size is 2 pixels
The filter is WHITE
There are 9 detected source(s) for 889483_g899
Aspect correction adds 0.00107 degrees (0.256 sec of time = 3.80 arc sec) to RA
Aspect correction adds -0.00029 degrees (-1.04 arcsec) to Dec
Total aspect correction is 3.94 arcsec
Star catalogs centered at 284.6473 , -8.2325 with radius 2.21 arc min.
n_usno: 753 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 7 matched entries is 0.570" for 889483_g899
Mean and std. dev of mag. difference (MAG_DELTA) are 1.184 and 0.518 for 889483_g899
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 889483_g899.
Acceptable entries have no ID, XRT distances < 9.75", 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=284.6400 (18:58:33.60) DEC=-8.2350 (-08:14:06.0)
XRT distances are from RA=284.6439 (18:58:34.54) DEC=-8.2374 (-08:14:14.6)
-----------------
Entry 2 in the list of sources is a candidate afterglow for 889483_g899 with genie
ra=284.64941 (18:58:35.86) dec=-8.21780 (-08:13:04.1) +/- 0.6" mag=16.47+/-0.14
dist=73.3 REFID=5 major=0.8 minor=0.7 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 70.4 arc sec from the BAT position.
Found 17 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
284.6467 -8.2223 18.8 -1 USNO-B1 19.82 19.01 19.37
284.6483 -8.2222 16.3 -1 USNO-B1 20.01 19.37 19.65
284.6476 -8.2220 16.4 -1 USNO-B1 20.28 19.27 19.72
284.6516 -8.2215 15.5 -1 USNO-B1 16.67 15.07 15.78
284.6450 -8.2205 18.4 -1 USNO-B1 20.04 18.99 19.45
284.6503 -8.2199 8.0 -1 USNO-B1 20.33 18.36 19.23
284.6500 -8.2194 6.1 -1 USNO-B1 20.92 18.14 19.37
284.6537 -8.2201 17.4 -1 USNO-B1 20.23 19.14 19.63
284.6445 -8.2186 17.6 -1 USNO-B1 20.82 19.40 20.03
284.6460 -8.2171 12.5 -1 USNO-B1 17.15 15.23 16.09
284.6492 -8.2166 4.2 -1 USNO-B1 13.17 11.35 12.16 *
284.6449 -8.2165 16.8 -1 USNO-B1 18.66 16.96 17.71
284.6544 -8.2178 17.7 -1 USNO-B1 20.65 20.68 20.67
284.6480 -8.2159 8.4 -1 USNO-B1 15.12 19.62 17.62
284.6507 -8.2145 12.9 -1 USNO-B1 18.06 16.77 17.34
284.6503 -8.2141 13.5 -1 USNO-B1 19.36 17.90 18.55
284.6517 -8.2129 19.4 -1 USNO-B1 16.85 15.70 16.21
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 4 in the list of sources is a candidate afterglow for 889483_g899 with genie
ra=284.64969 (18:58:35.93) dec=-8.21620 (-08:12:58.3) +/- 0.6" mag=14.65+/-0.14
dist=79.1 REFID=4 major=1.4 minor=0.9 flag=2 (blended)
*** The position of this source is inconsistent with the XRT position.
The position is 76.0 arc sec from the BAT position.
Found 14 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
284.6503 -8.2199 13.3 -1 USNO-B1 20.33 18.36 19.23
284.6500 -8.2194 11.5 -1 USNO-B1 20.92 18.14 19.37
284.6460 -8.2171 13.7 -1 USNO-B1 17.15 15.23 16.09
284.6492 -8.2166 2.3 -1 USNO-B1 13.17 11.35 12.16 *
284.6449 -8.2165 17.2 -1 USNO-B1 18.66 16.96 17.71
284.6544 -8.2178 17.6 -1 USNO-B1 20.65 20.68 20.67
284.6480 -8.2159 6.2 -1 USNO-B1 15.12 19.62 17.62
284.6507 -8.2145 7.2 -1 USNO-B1 18.06 16.77 17.34
284.6547 -8.2157 17.9 -1 USNO-B1 20.80 19.55 20.11
284.6503 -8.2141 7.7 -1 USNO-B1 19.36 17.90 18.55
284.6517 -8.2129 13.9 -1 USNO-B1 16.85 15.70 16.21
284.6459 -8.2123 19.7 -1 USNO-B1 19.38 18.71 19.01
284.6516 -8.2121 16.3 -1 USNO-B1 17.02 16.09 16.50
284.6511 -8.2113 18.5 -1 USNO-B1 17.46 16.07 16.69
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
Found 4 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
284.6450 -8.2350 9.6 -1 USNO-B1 16.98 16.66 16.80
284.6440 -8.2357 6.3 -1 USNO-B1 16.05 15.07 15.51
284.6423 -8.2370 5.8 -1 USNO-B1 17.81 16.52 17.10
284.6444 -8.2386 4.9 -1 USNO-B1 18.81 17.37 18.01
The closest star is 4.88" away.
List UVOT sources within 10" of the XRT position:
There are 0.0000000 counts in the bkg source region of 0.0000000 pixels.
There are 0.0000000 counts in the xrt source region of 0.0000000 pixels.
There are 0.0000000 counts in the xrt_bkg source region of 0.0000000 pixels.
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 19.34, XRT distances < 9.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 889483_572173749_190218d09h29m16s402337usUT_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(284.6484,-8.2380,45")
fk5;-circle(284.65494479327,-8.22590292628176,6")
Region file: 889483_572173749_190218d09h29m16s402337usUT_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(284.6439,-8.2374,8")
Region file: 889483_572173749_190218d09h29m16s402337usUT_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(284.6439,-8.2374,25")
fk5;-circle(284.6439,-8.2374,15")
image paragraph message for exposure 2 of trigger 889483
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: damaged image (negative pixel value)
SRCLIST PROBLEM: srclist filled telemetry buffer
See notes for more details.
------ Start for Possible Stand-alone Circular ----
In response to GRB190218 (Swift/BAT trigger 889483) at 08:54:09 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 129 seconds with the White filter
starting 877 seconds after the BAT trigger. No credible afterglow candidate has
been found in the initial data products. The 2.7'x2.7' sub-image processing
FAILED because of damaged image (negative pixel value). The 8'x8' region for
the list of sources generated on-board covers 0.00% of the XRT error circle. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.26.
------- notes for trigger 889483 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190218d09h29m19s773047usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=889483
-expid=572173749 -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/889483/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
The Genie image appears to be DAMAGED with a min. value of -71.365829.
XRT position found for srclist. XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 572173749.2552 or about 2019:049:09:09:04 UT
Found 5000 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 66% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 60 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 9 source(s) in Genie image catalog. Found 2 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 19.34 mag. Found 749 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 106% of the
Genie image region. The Genie image is INCOMPLETE with 20186 null pixels.
The number of srclist sources filled the available telemetry. The weakest
source detected was 18.88 mag. The closest srclist source has ra= 284.6799 dec=
-8.1838 mag=16.60 sep=231.62". The closest Genie source has ra= 284.6549 dec=
-8.2259 mag=17.68 sep=57.11".
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?
572173749 877 WHITE srclist found no candidates.
572173749 877 WHITE image found no candidates.
List afterglow candidates for other finding charts.
572173415 543 WHITE 284.64550 -8.23749 17.42/19.2 5.7 srclist Yes
572173415 543 WHITE 284.64544 -8.23745 16.34/20.0 5.5 image Yes
------- Tokens for Quick GCN -------