image overlap message for exposure 2 of trigger 973140
uvot_overlap.pl vrs. 2010-12-20b fem started at 200519d22h14m02s790495usUT
The observation of trigger 973140 started 2020-05-19T11:25:18.4
Examining file ./973140_g294_uvot_sky_image.fits
The exposure ID is 611580318
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (255.3377,-30.3791) with a roll angle of 117.6
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 (255.3340,-30.3800) with a radius of 3.000 arc min
This is 0.202 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
The XRT error circle is centered at (255.3332,-30.3783) with a radius of 0.030 arc min
This is 0.242 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 973140
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200519d22h14m38s114453usUT
Observation start time is 2020-05-19T11:25:18.4
Examining file ./973140_g294_uvot_catalog_image.fits
The exposure ID is 611580318
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 28 detected source(s) for 973140_g294
Aspect correction adds 0.00081 degrees (0.194 sec of time = 2.51 arc sec) to RA
Aspect correction adds -0.00034 degrees (-1.22 arcsec) to Dec
Total aspect correction is 2.80 arcsec
Star catalogs centered at 255.3370 , -30.3794 with radius 2.57 arc min.
n_usno: 1037 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 26 matched entries is 0.790" for 973140_g294
Mean and std. dev of mag. difference (MAG_DELTA) are 1.433 and 1.190 for 973140_g294
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 973140_g294.
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=255.3340 (17:01:20.16) DEC=-30.3800 (-30:22:48.0)
XRT distances are from RA=255.3332 (17:01:19.96) DEC=-30.3783 (-30:22:41.7)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 973140_g294 with genie
ra=255.33342 (17:01:20.02) dec=-30.37805 (-30:22:41.0) +/- 0.6" mag=16.18+/-0.14
dist=1.1 REFID=16 major=1.0 minor=1.0 flag=3 (neighbor+blended)
Found 18 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
255.3376 -30.3801 14.9 -1 USNO-B1 17.71 17.83 17.78
255.3367 -30.3809 14.4 -1 USNO-B1 18.05 20.55 19.44
255.3332 -30.3800 7.1 -1 USNO-B1 18.45 19.20 18.87
255.3355 -30.3828 18.4 -1 USNO-B1 18.10 19.88 19.09
255.3344 -30.3827 17.0 -1 USNO-B1 17.99 20.99 19.66
255.3355 -30.3756 10.8 -1 USNO-B1 15.04 13.68 14.28
255.3324 -30.3808 10.4 -1 USNO-B1 18.23 17.79 17.99
255.3312 -30.3797 8.9 -1 USNO-B1 17.92 19.14 18.60
255.3369 -30.3744 17.1 -1 USNO-B1 99.99 15.94 99.99
255.3317 -30.3832 19.1 -1 USNO-B1 99.99 25.62 99.99
255.3317 -30.3744 14.1 -1 USNO-B1 99.99 17.79 99.99
255.3320 -30.3741 14.8 -1 USNO-B1 99.99 17.45 99.99
255.3302 -30.3759 12.8 -1 USNO-B1 18.34 20.98 19.81
255.3284 -30.3798 16.8 -1 USNO-B1 99.99 18.56 99.99
255.3281 -30.3796 17.5 -1 USNO-B1 17.54 20.45 19.16
255.3289 -30.3758 16.2 -1 USNO-B1 18.18 20.46 19.45
255.3276 -30.3790 18.5 -1 USNO-B1 17.68 17.70 17.69
255.3282 -30.3753 19.0 -1 USNO-B1 26.88 23.33 24.91
uvot_check_outside found 14 of 14 good pixels
##### This source remains a candidate #####
It has no entries within 3.5" or brighter than 12 mag
-----------------
Entry 2 in the list of sources is a candidate afterglow for 973140_g294 with genie
ra=255.33155 (17:01:19.57) dec=-30.37134 (-30:22:16.8) +/- 0.7" mag=18.19+/-0.16
dist=25.4 REFID=12 major=1.9 minor=1.1 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 32.1 arc sec from the BAT position.
Found 20 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
255.3355 -30.3756 19.6 -1 USNO-B1 15.04 13.68 14.28
255.3375 -30.3731 19.6 -1 USNO-B1 16.79 16.08 16.40
255.3317 -30.3744 11.1 -1 USNO-B1 99.99 17.79 99.99
255.3320 -30.3741 10.1 -1 USNO-B1 99.99 17.45 99.99
255.3302 -30.3759 16.9 -1 USNO-B1 18.34 20.98 19.81
255.3289 -30.3758 18.0 -1 USNO-B1 18.18 20.46 19.45
255.3282 -30.3753 17.8 -1 USNO-B1 26.88 23.33 24.91
255.3359 -30.3701 14.1 -1 USNO-B1 18.53 15.68 16.95
255.3310 -30.3712 1.8 -1 USNO-B1 16.53 14.31 15.30 *
255.3348 -30.3698 11.6 -1 USNO-B1 17.92 17.62 17.75
255.3365 -30.3695 16.7 -1 USNO-B1 18.85 99.99 99.99
255.3330 -30.3697 7.5 -1 USNO-B1 17.59 18.48 18.08
255.3357 -30.3683 16.9 -1 USNO-B1 18.40 99.99 99.99
255.3258 -30.3735 19.6 -1 USNO-B1 17.73 23.23 20.79
255.3363 -30.3679 19.1 -1 USNO-B1 18.37 17.81 18.06
255.3293 -30.3696 9.4 -1 USNO-B1 16.45 16.16 16.29
255.3347 -30.3675 16.8 -1 USNO-B1 17.67 17.39 17.51
255.3277 -30.3683 16.2 -1 USNO-B1 17.81 17.96 17.90
255.3320 -30.3660 19.3 -1 USNO-B1 18.30 16.40 17.24
255.3289 -30.3671 17.3 -1 USNO-B1 19.68 17.44 18.43
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
Found 3 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
255.3332 -30.3800 6.3 -1 USNO-B1 18.45 19.20 18.87
255.3324 -30.3808 9.5 -1 USNO-B1 18.23 17.79 17.99
255.3312 -30.3797 7.9 -1 USNO-B1 17.92 19.14 18.60
The closest star is 6.33" away.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=255.33342 (17:01:20.02) dec=-30.37805 (-30:22:41.0) +/- 0.6" mag=16.18+/-0.14 dist=1.1 REFID=16 flag=3
There are 27015.254 counts in the bkg source region of 5145.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 5.251 counts/pixel (5-sig UL in 4" is 19.56 mag) for 973140_g294
There are 1600.0216 counts in the src source region of 50.000000 pixels.
Rate in src region with 4 arcsec radius is 32.000 counts/pixel for 973140_g294
There are 5819.6294 counts in the cand_src_bkg source region of 1141.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 5.100 counts/pixel (5-sig UL in 4" is 19.58 mag) for 973140_g294
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 20.12, 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: 973140_611580318_200519d22h14m38s114453usUT_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(255.3377,-30.3791,45")
fk5;-circle(255.333418856472,-30.3780468651239,6")
fk5;-circle(255.335460739604,-30.375724278025,6")
fk5;-circle(255.331552045462,-30.3713408527102,6")
fk5;-circle(255.324225029662,-30.3791638348655,6")
fk5;-circle(255.339732290597,-30.3723200238894,6")
fk5;-circle(255.338842061614,-30.3846244143393,6")
fk5;-circle(255.333531548732,-30.387182841645,6")
fk5;-circle(255.329487782856,-30.3690669615002,6")
fk5;-circle(255.34315789308,-30.3710530208966,6")
fk5;-circle(255.328881997544,-30.3671793832917,6")
fk5;-circle(255.331943727325,-30.3660752450735,6")
fk5;-circle(255.344195081043,-30.3675582044992,6")
fk5;-circle(255.340500301146,-30.3908609860894,6")
fk5;-circle(255.342134005188,-30.3912842156125,6")
fk5;-circle(255.348497210243,-30.3698475134209,6")
fk5;-circle(255.351619719909,-30.3810187911425,6")
fk5;-circle(255.350421813363,-30.3872259966522,6")
Region file: 973140_611580318_200519d22h14m38s114453usUT_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(255.333418856472,-30.3780468651239,4")
Region file: 973140_611580318_200519d22h14m38s114453usUT_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(255.333418856472,-30.3780468651239,25")
fk5;-circle(255.333418856472,-30.3780468651239,15")
fk5;-circle(255.335460739604,-30.375724278025,6")
fk5;-circle(255.331552045462,-30.3713408527102,6")
fk5;-circle(255.324225029662,-30.3791638348655,6")
fk5;-circle(255.339732290597,-30.3723200238894,6")
fk5;-circle(255.338842061614,-30.3846244143393,6")
image paragraph message for exposure 2 of trigger 973140
SRCLIST PROBLEM: access to all star catalogs failed
------ Start for Possible Stand-alone Circular ----
In response to GRB200519 (Swift/BAT trigger 973140) at 11:20:23 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) = 17:01:20.02 = 255.33342
DEC(J2000) = -30:22:41.0 = -30.37805
with a 90%-confidence error radius of about 0.62 arc sec. This position is 1.1
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.18 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.47.
------- notes for trigger 973140 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200519d22h14m42s108616usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=973140
-expid=611580318 -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/973140/
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 611580318.44804 or about 2020:140:11:25:13 UT
Found 5000 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 87% of the srclist region. Found 184 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 68 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 28 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
20.12 mag. Found 1033 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 108% 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?
611580318 269 U 255.33323 -30.37815 17.02/18.1 0.4 srclist Yes
611580318 269 U 255.33342 -30.37805 16.18/20.1 1.1 image Yes
List afterglow candidates for other finding charts.
611580106 57 WHITE 255.33332 -30.37797 16.46/19.2 1.1 srclist Yes
611580106 57 WHITE 255.33335 -30.37803 15.38/20.3 1.0 image Yes
611580918 869 WHITE srclist found no candidates.
611580918 869 WHITE 255.33333 -30.37807 17.17/20.0 2.0 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -30.37805
GRB_ERROR: 0.62
GRB_RA: 255.33342
IMAGE_START_TIME: 11:25:13
MAGNITUDE: 16.18
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT