image overlap message for exposure 2 of trigger 895503
uvot_overlap.pl vrs. 2010-12-20b fem started at 190327d23h32m37s023974usUT
The observation of trigger 895503 started 2019-03-27T23:21:18.0
Examining file 895503_g303_uvot_sky_image.fits
The exposure ID is 575421677
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (297.8220,39.0701) 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 0.282 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 2 of trigger 895503
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190327d23h32m38s051866usUT
Observation start time is 2019-03-27T23:21:18.0
Examining file 895503_g303_uvot_catalog_image.fits
The exposure ID is 575421677
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 45 detected source(s) for 895503_g303
Aspect correction adds 0.00147 degrees (0.352 sec of time = 4.10 arc sec) to RA
Aspect correction adds -0.00034 degrees (-1.21 arcsec) to Dec
Total aspect correction is 4.28 arcsec
Star catalogs centered at 297.8200 , 39.0673 with radius 2.72 arc min.
n_usno: 436 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 44 matched entries is 0.553" for 895503_g303
Mean and std. dev of mag. difference (MAG_DELTA) are 1.792 and 0.787 for 895503_g303
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 895503_g303.
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 20 in the list of sources is a candidate afterglow for 895503_g303 with genie
ra=297.80177 (19:51:12.43) dec=39.08099 (+39:04:51.6) +/- 0.6" mag=14.59+/-0.14
dist=56.1 REFID=9 major=1.1 minor=1.0 flag=3 (neighbor+blended)
This source is near the edge of image (0.863)
Found 7 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
297.8035 39.0797 6.7 -1 USNO-B1 14.54 99.99 99.99
297.8072 39.0824 15.9 -1 USNO-B1 17.83 16.73 17.22
297.8027 39.0804 3.2 -1 USNO-B1 99.99 12.30 99.99 *
297.8022 39.0801 3.4 -1 USNO-B1 18.35 12.70 15.21 *
297.8047 39.0844 14.8 -1 USNO-B1 19.72 18.23 18.89
297.8014 39.0838 10.3 -1 USNO-B1 19.06 18.08 18.51
297.7967 39.0847 19.4 -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
-----------------
Entry 43 in the list of sources is a candidate afterglow for 895503_g303 with genie
ra=297.85167 (19:51:24.40) dec=39.07991 (+39:04:47.7) +/- 0.7" mag=18.77+/-0.19
dist=105.9 REFID=12 major=0.7 minor=0.4 flag=0
This source is near the edge of image (0.978)
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
297.8482 39.0772 13.7 -1 USNO-B1 17.17 16.41 16.74
297.8522 39.0806 2.8 -1 USNO-B1 15.52 13.73 14.52 *
297.8497 39.0837 14.6 -1 USNO-B1 18.27 17.45 17.82
297.8531 39.0797 4.1 -1 USNO-B1 99.99 17.80 99.99 *
297.8546 39.0773 12.5 -1 USNO-B1 17.08 15.43 16.17
297.8542 39.0840 16.2 -1 USNO-B1 20.05 18.86 19.39
297.8584 39.0785 19.6 -1 USNO-B1 19.62 18.10 18.77
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 43069.391 counts in the bkg source region of 4930.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 8.736 counts/pixel (5-sig UL in 4" is 19.29 mag) for 895503_g303
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.28, 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_575421677_190327d23h32m38s051866usUT_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(297.8220,39.0701,45")
fk5;-circle(297.810715833155,39.0699630526749,6")
fk5;-circle(297.822225217381,39.0690231328672,6")
fk5;-circle(297.810082583133,39.0645972163991,6")
fk5;-circle(297.811624779632,39.0766615342214,6")
fk5;-circle(297.806146997677,39.0707046970338,6")
fk5;-circle(297.805518961541,39.0672574976964,6")
fk5;-circle(297.813807156917,39.0790990122986,6")
fk5;-circle(297.825372907303,39.0629804624124,6")
fk5;-circle(297.830801879255,39.067621400256,6")
fk5;-circle(297.827123296517,39.0780183438258,6")
fk5;-circle(297.831614200394,39.072707039864,6")
fk5;-circle(297.832195289757,39.0655235543528,6")
fk5;-circle(297.834756850734,39.0695176488194,6")
fk5;-circle(297.831811416126,39.0791740104693,6")
fk5;-circle(297.837724674416,39.0772582004691,6")
image paragraph message for exposure 2 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 250 seconds with the U filter starting
281 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 19.2 mag. The
8'x8' region for the list of sources generated on-board covers 100% of the BAT
error circle. The limiting magnitude for the list of sources is expected to be
about 17.7. 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 190327d23h32m39s306915usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=895503
-expid=575421677 -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 575421677.96276 or about 2019:086:23:21:12 UT
Found 3777 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 29 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 17.56 mag.
Found 45 source(s) in Genie image catalog. Found 2 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 19.28 mag. Found 432 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 43069.4 counts in the large background region of 4930.0 pixels or a rate
of 8.736 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 19.33 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 17.83 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?
575421677 280 U srclist found no candidates.
575421677 280 U 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
------- Tokens for Quick GCN -------