image overlap message for exposure 3 of trigger 895503
uvot_overlap.pl vrs. 2010-12-20b fem started at 190327d23h36m42s381027usUT
The observation of trigger 895503 started 2019-03-27T23:30:56.0
Examining file 895503_g882_uvot_sky_image.fits
The exposure ID is 575422256
The exposure time is 72.511 (seconds)
The filter is WHITE.
The uvot region is centered at (297.8225,39.0695) with a roll angle of 101.7
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 (297.8160,39.0700) with a radius of 3.000 arc min
This is 0.307 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
Could not find the location of an XRT error circle
image afterglow message for exposure 3 of trigger 895503
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190327d23h36m43s489630usUT
Observation start time is 2019-03-27T23:30:56.0
Examining file 895503_g882_uvot_catalog_image.fits
The exposure ID is 575422256
The exposure is 72.511 sec.
The bin size is 2 pixels
The filter is WHITE
There are 51 detected source(s) for 895503_g882
Aspect correction adds 0.00099 degrees (0.238 sec of time = 2.77 arc sec) to RA
Aspect correction adds -0.00039 degrees (-1.39 arcsec) to Dec
Total aspect correction is 3.10 arcsec
Star catalogs centered at 297.8203 , 39.0673 with radius 2.71 arc min.
n_usno: 431 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.69986
RA DEC Mag Color
bright star 0: 297.83911 (19:51:21.39) 39.05924 (+39:03:33.2) 11.70 USNO-V
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 49 matched entries is 0.481" for 895503_g882
Mean and std. dev of mag. difference (MAG_DELTA) are 1.364 and 0.508 for 895503_g882
Found 3 entries without IDs and 3 entries that are acceptable afterglow candidates for 895503_g882.
Acceptable entries have no ID, BAT distance < 200" or XRT distance < 10", 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=297.8160 (19:51:15.84) DEC=39.0700 (+39:04:12.0)
XRT distances are as reported in catalog file.
-----------------
Entry 10 in the list of sources is a candidate afterglow for 895503_g882 with genie
ra=297.81460 (19:51:15.50) dec=39.05861 (+39:03:31.0) +/- 0.9" mag=19.43+/-0.25
dist=41.2 REFID=43 major=1.4 minor=0.9 flag=0
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
297.8169 39.0595 7.3 -1 USNO-B1 19.38 18.45 18.86
297.8137 39.0608 8.2 -1 USNO-B1 19.18 18.05 18.55
297.8147 39.0592 2.2 -1 USNO-B1 17.34 16.42 16.83 *
297.8126 39.0573 7.2 -1 USNO-B1 18.95 18.04 18.44
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 16 in the list of sources is a candidate afterglow for 895503_g882 with genie
ra=297.80438 (19:51:13.05) dec=39.07960 (+39:04:46.6) +/- 0.6" mag=16.99+/-0.15
dist=47.4 REFID=12 major=0.6 minor=0.4 flag=0
Found 6 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
297.8035 39.0797 2.5 -1 USNO-B1 14.54 99.99 99.99 *
297.8072 39.0824 12.8 -1 USNO-B1 17.83 16.73 17.22
297.8027 39.0804 5.7 -1 USNO-B1 99.99 12.30 99.99
297.8022 39.0801 6.2 -1 USNO-B1 18.35 12.70 15.21
297.8047 39.0844 17.3 -1 USNO-B1 19.72 18.23 18.89
297.8014 39.0838 17.3 -1 USNO-B1 19.06 18.08 18.51
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 25 in the list of sources is a candidate afterglow for 895503_g882 with genie
ra=297.80182 (19:51:12.44) dec=39.08083 (+39:04:51.0) +/- 0.6" mag=13.72+/-0.14
dist=55.6 REFID=11 major=0.6 minor=0.6 flag=0
This source is near the edge of image (0.885)
Found 7 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
297.8035 39.0797 6.3 -1 USNO-B1 14.54 99.99 99.99
297.8072 39.0824 16.0 -1 USNO-B1 17.83 16.73 17.22
297.8027 39.0804 2.8 -1 USNO-B1 99.99 12.30 99.99 *
297.8022 39.0801 2.9 -1 USNO-B1 18.35 12.70 15.21 *
297.8047 39.0844 15.2 -1 USNO-B1 19.72 18.23 18.89
297.8014 39.0838 10.9 -1 USNO-B1 19.06 18.08 18.51
297.7967 39.0847 19.9 -1 USNO-B1 17.71 16.48 17.03
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" or brighter than 12 mag
There are 81398.023 counts in the bkg source region of 4740.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 17.173 counts/pixel (5-sig UL in 4" is 19.02 mag) for 895503_g882
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.01, BAT distances < 200",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 895503_575422256_190327d23h36m43s489630usUT_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(297.8225,39.0695,45")
fk5;-circle(297.819016918762,39.0679037080113,6")
fk5;-circle(297.810683014299,39.0699424870727,6")
fk5;-circle(297.822284182306,39.069073852806,6")
fk5;-circle(297.810000384678,39.0644408454384,6")
fk5;-circle(297.81153904492,39.0766275864522,6")
fk5;-circle(297.806131182962,39.0707408017496,6")
fk5;-circle(297.824494226052,39.0753050355176,6")
fk5;-circle(297.80552581924,39.0672345387624,6")
fk5;-circle(297.813829305348,39.0791709436407,6")
fk5;-circle(297.825515992024,39.0634876533403,6")
fk5;-circle(297.814602912914,39.0586138963059,6")
fk5;-circle(297.830840919698,39.0676620663197,6")
fk5;-circle(297.827186651263,39.0780235143997,6")
fk5;-circle(297.831572791409,39.0726853963021,6")
fk5;-circle(297.832196395058,39.0655924372686,6")
fk5;-circle(297.83477848468,39.0695388442296,6")
fk5;-circle(297.831798950722,39.079194580083,6")
image paragraph message for exposure 3 of trigger 895503
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: partial overlap
SRCLIST PROBLEM: srclist filled telemetry buffer
See notes for more details.
------ Start for Possible Stand-alone Circular ----
In response to GRB190327 (Swift/BAT trigger 895503) at 23:16:13 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 73 seconds with the White filter
starting 859 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 25% of
the BAT error circle. The typical 3-sigma upper limit has been about 19.6 mag.
The 8'x8' region for the list of sources generated on-board covers 30% of the
BAT error circle. 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
0.25.
------- notes for trigger 895503 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190327d23h36m45s220644usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=895503
-expid=575422256 -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/895503/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
No XRT position found for srclist. No XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 575422256.04352 or about 2019:086:23:30:51 UT
Found 3097 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 39% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 15 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.66 mag.
Found 51 source(s) in Genie image catalog. Found 3 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 19.01 mag. Found 427 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
40% of the Genie image region.
Genie image analysis:
Found 81398.0 counts in the large background region of 4740.0 pixels or a rate
of 17.173 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 19.02 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 19.21 mag.
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?
575422256 859 WHITE srclist found no candidates.
575422256 859 WHITE image found no candidates.
List afterglow candidates for other finding charts.
575421465 68 WHITE 297.78402 39.03139 17.47/18.7 165.3 srclist Yes
575421465 68 WHITE 297.74823 39.05393 18.41/18.7 198.1 srclist Yes
575421465 68 WHITE 297.83484 39.07434 18.58/19.8 54.9 image Yes
575421677 280 U srclist found no candidates.
575421677 280 U image found no candidates.
------- Tokens for Quick GCN -------