image overlap message for exposure 1 of trigger 899979
uvot_overlap.pl vrs. 2010-12-20b fem started at 190423d02h44m36s766271usUT
The observation of trigger 899979 started 2019-04-22T23:04:44.0
Examining file ./899979_g553_uvot_sky_image.fits
The exposure ID is 577667083
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (182.1241,-60.2429) with a roll angle of 215.8
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 (182.1240,-60.2380) with a radius of 3.000 arc min
This is 0.295 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 (182.0345,-60.2242) with a radius of 0.030 arc min
This is 2.894 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 0.000 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 899979
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190423d02h44m42s245576usUT
Observation start time is 2019-04-22T23:04:44.0
Examining file ./899979_g553_uvot_catalog_image.fits
The exposure ID is 577667083
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 57 detected source(s) for 899979_g553
Aspect correction adds -0.00162 degrees (-0.390 sec of time = -2.90 arc sec) to RA
Aspect correction adds -0.00147 degrees (-5.31 arcsec) to Dec
Total aspect correction is 6.05 arcsec
Star catalogs centered at 182.1187 , -60.2433 with radius 2.80 arc min.
n_usno: 449 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.9133
RA DEC Mag Color
bright star 0: 182.15575 (12:08:37.38) -60.20486 (-60:12:17.5) 11.91 USNO-V
Mean distance difference (CAT_DELTA) for 57 matched entries is 0.569" for 899979_g553
Mean and std. dev of mag. difference (MAG_DELTA) are 1.781 and 0.727 for 899979_g553
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 899979_g553.
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=182.1240 (12:08:29.76) DEC=-60.2380 (-60:14:16.8)
XRT distances are from RA=182.0345 (12:08:08.28) DEC=-60.2242 (-60:13:27.3)
-----------------
Entry 23 in the list of sources is a candidate afterglow for 899979_g553 with genie
ra=182.10957 (12:08:26.30) dec=-60.22488 (-60:13:29.6) +/- 0.9" mag=20.51+/-0.26
dist=134.2 REFID=8 major=1.2 minor=1.0 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 53.8 arc sec from the BAT position.
This source is near the edge of image (0.881)
Found 4 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
182.1114 -60.2254 3.8 -1 USNO-B1 17.81 16.24 16.94 *
182.1101 -60.2251 1.3 -1 USNO-B1 17.51 16.46 16.93 *
182.1101 -60.2244 2.1 -1 USNO-B1 99.99 17.93 99.99 *
182.0990 -60.2247 18.9 -1 USNO-B1 18.17 17.28 17.68
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" or brighter than 12 mag
Found 1 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
182.0344 -60.2257 5.3 -1 USNO-B1 15.62 14.81 15.17
The closest star is 5.30" away.
List UVOT sources within 10" of the XRT position:
There are 63061.848 counts in the bkg source region of 4394.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 14.352 counts/pixel (5-sig UL in 4" is 19.90 mag) for 899979_g553
Do not compute counts in XRT region because position is too far from center.
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 20.46, 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: 899979_577667083_190423d02h44m42s245576usUT_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(182.1241,-60.2429,45")
fk5;-circle(182.123871300479,-60.2376178394988,6")
fk5;-circle(182.130011885516,-60.2399896862846,6")
fk5;-circle(182.120634697911,-60.2344979403686,6")
fk5;-circle(182.117000334408,-60.2400382144386,6")
fk5;-circle(182.114066017783,-60.2354759200283,6")
fk5;-circle(182.112276714944,-60.2397783912746,6")
fk5;-circle(182.132712030558,-60.2436799850341,6")
fk5;-circle(182.106655059423,-60.2370361004472,6")
fk5;-circle(182.11858536137,-60.2292992029746,6")
fk5;-circle(182.106715698637,-60.2347799308577,6")
fk5;-circle(182.145613074271,-60.2401022332714,6")
fk5;-circle(182.136014143435,-60.2472326277275,6")
fk5;-circle(182.107353779201,-60.2460329678907,6")
fk5;-circle(182.130166555344,-60.249182940697,6")
fk5;-circle(182.103402998277,-60.2435170314121,6")
fk5;-circle(182.147688479618,-60.2369791345626,6")
fk5;-circle(182.118689999562,-60.2510396017368,6")
fk5;-circle(182.099825275513,-60.2438462211414,6")
fk5;-circle(182.148957532683,-60.2436642769747,6")
fk5;-circle(182.120228282663,-60.2530760324706,6")
fk5;-circle(182.148895638575,-60.2471132597728,6")
fk5;-circle(182.102692221694,-60.2497330421601,6")
image paragraph message for exposure 1 of trigger 899979
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no overlap
SRCLIST PROBLEM: srclist filled telemetry buffer
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB190422 (Swift/BAT trigger 899979) at 22:55:29 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 531 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 none of
the XRT error circle. 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 large, but
uncertain, extinction expected.
------- notes for trigger 899979 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190423d02h44m46s298578usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=899979
-expid=577667083 -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/899979/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Large extinction of 5.23 found for bat position. Unreliable extinction found
for xrt position. XRT position found for srclist. XRT position found for Genie
image. BAT position found.
UVOT exposure began at MET 577667083.97362 or about 2019:112:23:04:38 UT
Found 2094 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 38% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 23 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 57 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 20.46 mag. Found 445 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
39% of the Genie image region.
Genie image analysis:
Found 63061.8 counts in the large background region of 4394.0 pixels or a rate
of 14.352 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 19.90 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 18.79 mag.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 182.0347 dec= -60.2259 mag=17.44 sep=5.94".
The closest srclist source has ra= 182.0347 dec= -60.2259 mag=17.44 sep=5.94".
The closest Genie source has ra= 182.0754 dec= -60.2320 mag=19.23 sep=78.22".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 531 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 12:08:08.32 = 182.03467
DEC(J2000) = -60:13:33.2 = -60.22590
with a 90%-confidence error radius of about 1.10 arc sec. This position is 5.94
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.44 with a 1-sigma error of about 0.35. No correction has been made for the
large, but uncertain, extinction expected.
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?
577667083 531 WHITE srclist found no candidates.
577667083 531 WHITE image found no candidates.
List afterglow candidates for other finding charts.
577667417 865 WHITE srclist found no candidates.
577667417 865 WHITE image found no candidates.
------- Tokens for Quick GCN -------