srclist overlap message for exposure 3 of trigger 906654
uvot_overlap.pl vrs. 2010-12-20b fem started at 190604d18h46m00s174364usUT
The observation of trigger 906654 started 2019-06-04T15:12:08.3
Examining file ./906654_g892_uvot_sky_srclist.fits
The exposure ID is 581353928
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (297.5575,-32.9782) with a roll angle of 92.9
It is square with sides of 12.05 arc min. for an area of 145.15 sq arc min
The BAT error circle is centered at (297.5870,-32.9320) with a radius of 3.000 arc min
This is 3.146 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 28.10 sq. arc min or 0.99 of the BAT error circle
The XRT error circle is centered at (297.5406,-32.9780) with a radius of 0.032 arc min
This is 0.850 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 0.003 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 3 of trigger 906654
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190604d18h46m26s071656usUT
Observation start time is 2019-06-04T15:12:08.3
Examining file ./906654_g892_uvot_catalog_srclist.fits
The exposure ID is 581353928
The exposure is 149.967 sec.
The bin size is 2 pixels
The filter is WHITE
There are 189 detected source(s) for 906654_g892
Aspect correction adds 0.00303 degrees (0.727 sec of time = 9.15 arc sec) to RA
Aspect correction adds -0.00147 degrees (-5.28 arcsec) to Dec
Total aspect correction is 10.56 arcsec
Star catalogs centered at 297.5564 , -32.9774 with radius 8.71 arc min.
n_usno: 2071 n_gsc: 0
*** WARNING -- bright star catalog has 6 entries brighter than 12 mag
The brightest has mag 11.03604
RA DEC Mag Color
bright star 0: 297.51590 (19:50:03.82) -32.97606 (-32:58:33.8) 11.04 USNO-V
bright star 1: 297.48800 (19:49:57.12) -33.00852 (-33:00:30.7) 11.56 USNO-V
bright star 2: 297.49436 (19:49:58.65) -33.06478 (-33:03:53.2) 11.43 USNO-V
bright star 3: 297.64006 (19:50:33.61) -32.87091 (-32:52:15.3) 11.19 USNO-V
bright star 4: 297.52654 (19:50:06.37) -33.11508 (-33:06:54.3) 11.62 USNO-V
bright star 5: 297.71423 (19:50:51.42) -33.03283 (-33:01:58.2) 11.92 USNO-V
Mean distance difference (CAT_DELTA) for 188 matched entries is 0.720" for 906654_g892
Mean and std. dev of mag. difference (MAG_DELTA) are 1.316 and 0.670 for 906654_g892
Found 6 entries without IDs and 1 entries that are acceptable afterglow candidates for 906654_g892.
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.
2 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=297.5870 (19:50:20.88) DEC=-32.9320 (-32:55:55.2)
XRT distances are from RA=297.5406 (19:50:09.74) DEC=-32.9780 (-32:58:40.9)
-----------------
Entry 103 in the list of sources is a candidate afterglow for 906654_g892 with 1x1 stamp
ra=297.59763 (19:50:23.43) dec=-32.91866 (-32:55:07.2) +/- 1.1" mag=18.88+/-0.35
dist=274.6 REFID=144
*** The position of this source is inconsistent with the XRT position.
The position is 60.8 arc sec from the BAT position.
src: 103 distr. of nearby unmatched sources: 0 0 0 0 0
Found 3 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
297.5982 -32.9206 7.2 -1 USNO-B1 21.03 99.99 99.99
297.5963 -32.9187 3.9 -1 USNO-B1 16.24 15.39 15.76 *
297.6007 -32.9203 11.1 -1 USNO-B1 19.98 19.15 19.52
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
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 19.22, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
srclist paragraph message for exposure 3 of trigger 906654
SRCLIST PROBLEM: srclist filled telemetry buffer
------ Start for Possible Stand-alone Circular ----
In response to GRB190604 (Swift/BAT trigger 906654) at 14:57:15 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 869 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 coverage of the XRT error circle by the 8'x8' region for the list of
sources generated on-board is uncertain because the large number of sources
filled the available telemetry. 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 0.15.
------- notes for trigger 906654 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190604d18h46m31s628413usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=906654
-expid=581353928 -meonly -msg_srclist
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/906654/
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.
*** Warning -- BAT and XRT error circles do NOT overlap.
UVOT exposure began at MET 581353928.33504 or about 2019:155:15:12:03 UT
Found 2067 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 18% of the srclist region. Found 189 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 6 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 21 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 20.54 mag. Found 169 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
16% of the Genie image region.
Genie image analysis:
Found 65190.4 counts in the large background region of 5259.0 pixels or a rate
of 12.396 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 19.98 mag. for a
4-arcsec aperture.
Found 2494.4 counts in the XRT position region of 199.0 pixels or a rate of
12.535 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.066 +/- 0.365 (1-sigma) cps. The
3-sigma UL at the XRT position is 1.096 cps or 19.68 mag. The number of srclist
sources filled the available telemetry. The weakest source detected was 19.21
mag. The closest srclist source has ra= 297.5428 dec= -32.9813 mag=17.85
sep=13.55". The closest Genie source has ra= 297.5427 dec= -32.9812 mag=17.22
sep=13.20".
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?
581353928 869 WHITE srclist found no candidates.
581353928 869 WHITE image found no candidates.
List afterglow candidates for other finding charts.
581353185 126 WHITE srclist found no candidates.
581353185 126 WHITE image found no candidates.
581353397 338 U srclist found no candidates.
581353397 338 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -32.97803
GRB_ERROR: 5
GRB_RA: 297.54058
IMAGE_START_TIME: 15:12:03
MAGNITUDE: 19.7
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT