image overlap message for exposure 2 of trigger 819490
uvot_overlap.pl vrs. 2010-12-20b fem started at 180329d19h47m06s377066usUT
The observation of trigger 819490 started 2018-03-29T14:13:14.4
Examining file ./819490_g290_uvot_sky_image.fits
The exposure ID is 544025594
The exposure time is 249.946 (seconds)
The filter is U.
The uvot region is centered at (82.8996,-23.6913) with a roll angle of 279.5
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 (82.9160,-23.7080) with a radius of 3.000 arc min
This is 1.346 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 7.16 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (82.9038,-23.6909) with a radius of 0.028 arc min
This is 0.229 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 819490
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180329d19h47m16s476223usUT
Observation start time is 2018-03-29T14:13:14.4
Examining file ./819490_g290_uvot_catalog_image.fits
The exposure ID is 544025594
The exposure is 249.946 sec.
The bin size is 2 pixels
The filter is U
There are 4 detected source(s) for 819490_g290
Aspect correction adds 0.00051 degrees (0.123 sec of time = 1.69 arc sec) to RA
Aspect correction adds 0.00008 degrees ( 0.30 arcsec) to Dec
Total aspect correction is 1.72 arcsec
Star catalogs centered at 82.8982 , -23.6908 with radius 2.07 arc min.
n_usno: 52 n_gsc: 54
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.92876
RA DEC Mag Color
bright star 0: 82.89076 (05:31:33.78) -23.68728 (-23:41:14.2) 11.93 USNO-V
Mean distance difference (CAT_DELTA) for 3 matched entries is 0.501" for 819490_g290
Mean and std. dev of mag. difference (MAG_DELTA) are 0.808 and 1.043 for 819490_g290
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 819490_g290.
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.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=82.9160 (05:31:39.84) DEC=-23.7080 (-23:42:28.8)
XRT distances are from RA=82.9038 (05:31:36.90) DEC=-23.6909 (-23:41:27.1)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 819490_g290 with genie
ra=82.90380 (05:31:36.91) dec=-23.69052 (-23:41:25.9) +/- 0.7" mag=16.35+/-0.14
dist=1.2 REFID=4 major=1.1 minor=1.0 flag=2 (blended)
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
82.9010 -23.6881 12.5 -1 USNO-B1 21.01 19.20 20.00
82.9014 -23.6942 15.5 -1 USNO-B1 21.36 19.74 20.46
82.8986 -23.6889 18.1 -1 GSC2.3 99.99 22.52 99.99
82.8986 -23.6883 18.9 -1 GSC2.3 99.99 22.52 99.99
82.9052 -23.6942 14.0 -1 GSC2.3 99.99 22.35 99.99
uvot_check_outside found 12 of 12 good pixels
##### This source remains a candidate #####
It has no entries within 3.5" or brighter than 12 mag
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=82.90380 (05:31:36.91) dec=-23.69052 (-23:41:25.9) +/- 0.7" mag=16.35+/-0.14 dist=1.2 REFID=4 flag=2
There are 16245.227 counts in the bkg source region of 5851.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 2.776 counts/pixel (5-sig UL in 4" is 19.91 mag) for 819490_g290
There are 1231.4323 counts in the src source region of 51.000000 pixels.
Rate in src region with 4 arcsec radius is 24.146 counts/pixel for 819490_g290
There are 3085.2983 counts in the cand_src_bkg source region of 1108.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 2.785 counts/pixel (5-sig UL in 4" is 19.91 mag) for 819490_g290
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 20.47, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
Region file: 819490_544025594_180329d19h47m16s476223usUT_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(82.8996,-23.6913,45")
fk5;-circle(82.9038043362384,-23.6905202214467,6")
fk5;-circle(82.901498080457,-23.6836373051397,6")
fk5;-circle(82.8987327868507,-23.6942851176628,6")
fk5;-circle(82.8908882767337,-23.6871351725332,6")
Region file: 819490_544025594_180329d19h47m16s476223usUT_cand_src.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(82.9038043362384,-23.6905202214467,4")
Region file: 819490_544025594_180329d19h47m16s476223usUT_cand_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(82.9038043362384,-23.6905202214467,25")
fk5;-circle(82.9038043362384,-23.6905202214467,15")
fk5;-circle(82.901498080457,-23.6836373051397,6")
fk5;-circle(82.8987327868507,-23.6942851176628,6")
image paragraph message for exposure 2 of trigger 819490
------ Start for Possible Stand-alone Circular ----
In response to GRB180329 (Swift/BAT trigger 819490) at 14:08:23 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
269 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 05:31:36.91 = 82.90380
DEC(J2000) = -23:41:25.9 = -23.69052
with a 90%-confidence error radius of about 0.75 arc sec. This position is 1.2
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.35 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.04.
------- notes for trigger 819490 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180329d19h47m19s505547usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=819490
-expid=544025594 -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/819490/
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 544025594.3968 or about 2018:088:14:13:09 UT
Found 353 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 64 sources in
srclist catalog. Found 21 srclist source(s) without IDs. There are 1 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.12 mag.
Found 4 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 1 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.47 mag. Found 54 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 8% of the Genie image region.
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?
544025594 269 U 82.90370 -23.69066 17.07/18.1 0.7 srclist Yes
544025594 269 U 82.90380 -23.69052 16.35/20.5 1.2 image Yes
List afterglow candidates for other finding charts.
544025436 111 WHITE 82.90396 -23.69059 18.24/19.2 1.2 srclist Yes
544025436 111 WHITE 82.90376 -23.69052 17.65/20.7 1.2 image Yes
544026195 870 WHITE 82.90380 -23.69053 17.56/19.2 3.0 srclist Yes
544026195 870 WHITE 82.90388 -23.69049 16.95/20.7 3.1 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -23.69052
GRB_ERROR: 0.75
GRB_RA: 82.90380
IMAGE_START_TIME: 14:13:09
MAGNITUDE: 16.35
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT