srclist overlap message for exposure 2 of trigger 887512
uvot_overlap.pl vrs. 2010-12-20b fem started at 190203d19h53m49s089215usUT
The observation of trigger 887512 started 2019-02-03T15:49:09.7
Examining file ./887512_g300_uvot_sky_srclist.fits
The exposure ID is 570901749
The exposure time is undefined.
The filter is U.
The uvot region is centered at (22.5917,55.7189) with a roll angle of 240.8
It is square with sides of 8.03 arc min. for an area of 64.51 sq arc min
The BAT error circle is centered at (22.5770,55.7380) with a radius of 3.000 arc min
This is 1.249 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 28.11 sq. arc min or 0.99 of the BAT error circle
The XRT error circle is centered at (22.5966,55.7222) with a radius of 0.045 arc min
This is 0.257 arc min from the center of the uvot region
The area of the XRT error circle is 0.006 sq. arc min
The UVOT/XRT overlap is 0.006 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 2 of trigger 887512
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190203d19h54m00s169563usUT
Observation start time is 2019-02-03T15:49:09.7
Examining file ./887512_g300_uvot_catalog_srclist.fits
The exposure ID is 570901749
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 102 detected source(s) for 887512_g300
Aspect correction adds -0.00246 degrees (-0.591 sec of time = -5.00 arc sec) to RA
Aspect correction adds 0.00072 degrees ( 2.58 arcsec) to Dec
Total aspect correction is 5.63 arcsec
Star catalogs centered at 22.5873 , 55.7238 with radius 5.75 arc min.
n_usno: 1043 n_gsc: 0
*** WARNING -- bright star catalog has 3 entries brighter than 12 mag
The brightest has mag 9.82508
RA DEC Mag Color
bright star 0: 22.59698 (01:30:23.27) 55.75489 (+55:45:17.6) 11.65 USNO-V
bright star 1: 22.65768 (01:30:37.84) 55.75087 (+55:45:03.1) 9.83 USNO-V
bright star 2: 22.51257 (01:30:03.02) 55.67796 (+55:40:40.6) 10.60 USNO-V
Mean distance difference (CAT_DELTA) for 58 matched entries is 0.719" for 887512_g300
Mean and std. dev of mag. difference (MAG_DELTA) are 2.084 and 0.718 for 887512_g300
Found 46 entries without IDs and 1 entries that are acceptable afterglow candidates for 887512_g300.
Acceptable entries have no ID, XRT distances < 6.75", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
44 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=22.5770 (01:30:18.48) DEC=55.7380 (+55:44:16.8)
XRT distances are from RA=22.5966 (01:30:23.18) DEC=55.7222 (+55:43:19.9)
*** WARNING 45 per cent of entries have no IDs.
-----------------
Entry 1 in the list of sources is a candidate afterglow for 887512_g300 with 3x3 stamp
ra=22.61035 (01:30:26.49) dec=55.70538 (+55:42:19.4) +/- 1.1" mag=18.83+/-0.35
dist=66.7 REFID=64
*** The position of this source is inconsistent with the XRT position.
The position is 135.5 arc sec from the BAT position.
src: 1 distr. of nearby unmatched sources: 0 1 0 0 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
22.6061 55.7060 8.9 -1 USNO-B1 17.53 15.49 16.40
22.6063 55.7047 8.7 -1 USNO-B1 18.10 18.76 18.47
22.6099 55.7043 4.0 -1 USNO-B1 12.91 12.61 12.74 *
22.6197 55.7069 19.7 -1 USNO-B1 19.71 18.43 19.00
22.6151 55.7041 10.7 -1 USNO-B1 20.38 19.28 19.77
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 18.12, XRT distances < 6.75",
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 2 of trigger 887512
------ Start for Possible Stand-alone Circular ----
In response to GRB190203 (Swift/BAT trigger 887512) at 15:44:08 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
278 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 19.2 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 18.0 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.64.
------- notes for trigger 887512 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190203d19h54m02s902691usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=887512
-expid=570901749 -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/887512/
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 570901749.66778 or about 2019:034:15:49:04 UT
Found 1039 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 21% of the srclist region. Found 102 sources in
srclist catalog. Found 46 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.12 mag.
Found 12 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 20.43 mag. Found 187 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
20% of the Genie image region.
Genie image analysis:
Found 17761.0 counts in the large background region of 6011.0 pixels or a rate
of 2.955 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 19.92 mag. for a
4-arcsec aperture.
Found 575.5 counts in the XRT position region of 201.0 pixels or a rate of
2.863 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.064 +/- 0.104 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.312 cps or 19.64 mag. The closest srclist
source has ra= 22.6162 dec= 55.7253 mag=18.64 sep=41.27". The closest Genie
source has ra= 22.5855 dec= 55.7193 mag=19.04 sep=24.78".
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?
570901749 278 U srclist found no candidates.
570901749 278 U image found no candidates.
List afterglow candidates for other finding charts.
570901591 120 WHITE 22.59634 55.72211 19.10/19.2 0.6 srclist Yes
570901591 120 WHITE 22.59662 55.72241 18.58/20.6 0.8 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 55.72219
GRB_ERROR: 6.75
GRB_RA: 22.59658
IMAGE_START_TIME: 15:49:04
MAGNITUDE: 19.6
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT