srclist overlap message for exposure 1 of trigger 889785
uvot_overlap.pl vrs. 2010-12-20b fem started at 190220d15h15m48s708568usUT
The observation of trigger 889785 started 2019-02-20T03:01:23.7
Examining file ./889785_g108_uvot_sky_srclist.fits
The exposure ID is 572324483
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (330.1288,-76.6862) with a roll angle of 3.3
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 (330.1420,-76.6910) with a radius of 3.000 arc min
This is 0.339 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 28.27 sq. arc min or 1.00 of the BAT error circle
The XRT error circle is centered at (330.1637,-76.6813) with a radius of 0.025 arc min
This is 0.568 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
srclist afterglow message for exposure 1 of trigger 889785
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190220d15h15m54s953570usUT
Observation start time is 2019-02-20T03:01:23.7
Examining file ./889785_g108_uvot_catalog_srclist.fits
The exposure ID is 572324483
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 53 detected source(s) for 889785_g108
Aspect correction adds -0.00095 degrees (-0.228 sec of time = -0.78 arc sec) to RA
Aspect correction adds -0.00108 degrees (-3.88 arcsec) to Dec
Total aspect correction is 3.96 arcsec
Star catalogs centered at 330.1644 , -76.6814 with radius 6.12 arc min.
n_usno: 429 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.40392
RA DEC Mag Color
bright star 0: 330.30634 (22:01:13.52) -76.75395 (-76:45:14.2) 11.40 USNO-V
Mean distance difference (CAT_DELTA) for 49 matched entries is 0.625" for 889785_g108
Mean and std. dev of mag. difference (MAG_DELTA) are 1.159 and 0.526 for 889785_g108
Found 5 entries without IDs and 4 entries that are acceptable afterglow candidates for 889785_g108.
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.
1 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=330.1420 (22:00:34.08) DEC=-76.6910 (-76:41:27.6)
XRT distances are from RA=330.1637 (22:00:39.30) DEC=-76.6813 (-76:40:52.5)
-----------------
Entry 1 in the list of sources is a candidate afterglow for 889785_g108 with 3x3 stamp
ra=330.16463 (22:00:39.51) dec=-76.68097 (-76:40:51.5) +/- 1.1" mag=19.96+/-0.35
dist=1.2 REFID=52
src: 1 distr. of nearby unmatched sources: 1 0 0 0 0
Found 2 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
330.1731 -76.6853 17.0 -1 USNO-B1 19.17 18.02 18.53
330.1662 -76.6756 19.3 -1 USNO-B1 18.71 17.62 18.10
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
-----------------
Entry 2 in the list of sources is a candidate afterglow for 889785_g108 with 3x3 stamp
ra=330.16312 (22:00:39.15) dec=-76.68093 (-76:40:51.4) +/- 1.1" mag=19.62+/-0.35
dist=1.2 REFID=45
src: 2 distr. of nearby unmatched sources: 1 0 0 0 0
Found 2 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
330.1731 -76.6853 17.7 -1 USNO-B1 19.17 18.02 18.53
330.1662 -76.6756 19.3 -1 USNO-B1 18.71 17.62 18.10
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
-----------------
Entry 29 in the list of sources is a candidate afterglow for 889785_g108 with 3x3 stamp
ra=330.08034 (22:00:19.28) dec=-76.73076 (-76:43:50.7) +/- 1.1" mag=20.03+/-0.35
dist=191.1 REFID=51
*** The position of this source is inconsistent with the XRT position.
The position is 151.9 arc sec from the BAT position.
src: 29 distr. of nearby unmatched sources: 0 0 0 0 1
Found 3 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
330.0882 -76.7265 16.7 -1 USNO-B1 22.01 19.49 20.61
330.0891 -76.7267 16.2 -1 USNO-B1 20.74 19.22 19.89
330.0659 -76.7278 15.9 -1 USNO-B1 99.99 18.77 99.99
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 40 in the list of sources is a candidate afterglow for 889785_g108 with 3x3 stamp
ra=329.92362 (21:59:41.67) dec=-76.69608 (-76:41:45.9) +/- 1.1" mag=20.36+/-0.35
dist=206.0 REFID=53
*** The position of this source is inconsistent with the XRT position.
The position is 181.9 arc sec from the BAT position.
src: 40 distr. of nearby unmatched sources: 0 0 0 0 0
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
separation of 1 and 2 is 1.3 arc sec
Eliminate candidate 1 -- it is only 1.3 arc sec from candidate 2 and dimmer
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=330.16463 (22:00:39.51) dec=-76.68097 (-76:40:51.5) +/- 1.1" mag=19.96+/-0.35 dist=1.2 REFID=52
Unmatched source ra=330.16312 (22:00:39.15) dec=-76.68093 (-76:40:51.4) +/- 1.1" mag=19.62+/-0.35 dist=1.2 REFID=45
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 1 of trigger 889785
------ Start for Possible Stand-alone Circular ----
In response to GRB190220 (Swift/BAT trigger 889785) at 02:59:34 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 86 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 22:00:39.14 = 330.16309
DEC(J2000) = -76:40:50.4 = -76.68067
with a 90%-confidence error radius of about 0.66 arc sec. This position is 2.1
arc sec. from the center of the XRT error circle. The estimated magnitude is
19.29 with a 1-sigma error of about 0.16. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.13.
------- notes for trigger 889785 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190220d15h16m02s482168usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=889785
-expid=572324483 -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/889785/
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 572324483.73514 or about 2019:051:03:01:18 UT
Found 425 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 53 sources in
srclist catalog. Found 5 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 10 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 2 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.52 mag. Found 54 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 7% of the Genie image region.
Found 2 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 330.1646 dec= -76.6810 mag=19.96 sep=1.24".
The closest srclist source has ra= 330.1646 dec= -76.6810 mag=19.96 sep=1.24".
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?
572324483 85 WHITE 330.16312 -76.68093 19.62/19.2 1.2 srclist Yes
572324483 85 WHITE 330.16309 -76.68067 19.29/20.5 2.1 image Yes
List afterglow candidates for other finding charts.
572324695 297 U srclist found no candidates.
572324695 297 U image found no candidates.
572325273 875 WHITE srclist found no candidates.
572325273 875 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -76.68067
GRB_ERROR: 0.66
GRB_RA: 330.16309
IMAGE_START_TIME: 03:01:18
MAGNITUDE: 19.29
MAG_ERROR: 0.16
MESSAGE_TYPE: ACK
SOURCE: XRT