image overlap message for exposure 2 of trigger 889748
uvot_overlap.pl vrs. 2010-12-20b fem started at 190220d03h12m37s566512usUT
The observation of trigger 889748 started 2019-02-19T19:43:48.0
Examining file ./889748_g289_uvot_sky_image.fits
The exposure ID is 572298228
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (189.6274,76.6145) with a roll angle of 39.2
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 (189.7570,76.6140) with a radius of 3.000 arc min
This is 1.800 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 6.65 sq. arc min or 0.24 of the BAT error circle
The XRT error circle is centered at (189.6265,76.6126) with a radius of 0.028 arc min
This is 0.113 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
image afterglow message for exposure 2 of trigger 889748
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190220d03h13m08s713093usUT
Observation start time is 2019-02-19T19:43:48.0
Examining file ./889748_g289_uvot_catalog_image.fits
The exposure ID is 572298228
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 6 detected source(s) for 889748_g289
Aspect correction adds 0.00182 degrees (0.437 sec of time = 1.52 arc sec) to RA
Aspect correction adds 0.00110 degrees ( 3.95 arcsec) to Dec
Total aspect correction is 4.23 arcsec
Star catalogs centered at 189.6101 , 76.6181 with radius 2.61 arc min.
n_usno: 52 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 8 matched entries is 0.981" for 889748_g289
Mean and std. dev of mag. difference (MAG_DELTA) are 1.404 and 1.072 for 889748_g289
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 889748_g289.
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.
Magnitude criteria will be applied later.
BAT distances are from RA=189.7570 (12:39:01.68) DEC=76.6140 (+76:36:50.4)
XRT distances are from RA=189.6265 (12:38:30.37) DEC=76.6126 (+76:36:45.4)
-----------------
Entry 8 in the list of sources is a candidate afterglow for 889748_g289 with genie
ra=189.66884 (12:38:40.52) dec=76.64124 (+76:38:28.5) +/- 0.8" mag=17.79+/-0.15
dist=108.9 REFID=2 major=3.5 minor=1.8 flag=16 (aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 122.5 arc sec from the BAT position.
This source is near the edge of image (0.962)
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
189.6641 76.6435 9.1 -1 USNO-B1 19.40 20.04 19.76
189.6614 76.6456 16.9 -1 USNO-B1 13.93 12.57 13.18
189.6765 76.6444 13.0 -1 USNO-B1 99.99 19.57 99.99
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 3.5
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
189.6291 76.6128 2.3 -1 USNO-B1 21.33 20.24 20.72
The closest star is 2.30" away.
List UVOT sources within 10" of the XRT position:
There are 9643.7910 counts in the bkg source region of 6205.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 1.554 counts/pixel (5-sig UL in 4" is 20.23 mag) for 889748_g289
There are 338.60535 counts in the xrt source region of 199.00000 pixels.
Rate in xrt region with 8 arcsec radius is 1.702 counts/pixel for 889748_g289
There are 1940.6389 counts in the xrt_bkg source region of 1251.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 1.551 counts/pixel (5-sig UL in 4" is 20.23 mag) for 889748_g289
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 20.78, 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: 889748_572298228_190220d03h13m08s713093usUT_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(189.6274,76.6145,45")
fk5;-circle(189.591671272984,76.6156411411554,6")
Region file: 889748_572298228_190220d03h13m08s713093usUT_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(189.62654,76.61261,8")
Region file: 889748_572298228_190220d03h13m08s713093usUT_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(189.62654,76.61261,25")
fk5;-circle(189.62654,76.61261,15")
image paragraph message for exposure 2 of trigger 889748
------ Start for Possible Stand-alone Circular ----
In response to GRB190219 (Swift/BAT trigger 889748) at 19:38:58 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
267 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
0.03.
------- notes for trigger 889748 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190220d03h13m15s900567usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=889748
-expid=572298228 -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/889748/
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 572298228.03016 or about 2019:050:19:43:43 UT
Found 250 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 19 sources in
srclist catalog. Found 6 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 6 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 20.78 mag. Found 48 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 4% of the
Genie image region.
Genie image analysis:
Found 9643.8 counts in the large background region of 6205.0 pixels or a rate
of 1.554 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 20.27 mag. for a
4-arcsec aperture.
Found 338.6 counts in the XRT position region of 199.0 pixels or a rate of
1.702 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.120 +/- 0.079 (1-sigma) cps or
20.69 mag and a range from 20.14 to 21.85 mag. The 3-sigma UL at the XRT
position is 0.356 cps or 19.50 mag. The closest srclist source has ra= 189.5922
dec= 76.6158 mag=17.01 sep=30.86". The closest Genie source has ra= 189.5917
dec= 76.6156 mag=16.26 sep=31.04".
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?
572298228 267 U srclist found no candidates.
572298228 267 U image found no candidates.
List afterglow candidates for other finding charts.
572298069 108 WHITE srclist found no candidates.
572298069 108 WHITE image found no candidates.
572298831 870 WHITE srclist found no candidates.
572298831 870 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 76.61261
GRB_ERROR: 5
GRB_RA: 189.62654
IMAGE_START_TIME: 19:43:43
MAGNITUDE: 19.5
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT