image overlap message for exposure 3 of trigger 824063
uvot_overlap.pl vrs. 2010-12-20b fem started at 180410d11h11m06s372488usUT
The observation of trigger 824063 started 2018-04-10T08:17:49.9
Examining file ./824063_g889_uvot_sky_image.fits
The exposure ID is 545041069
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (95.9518,12.8098) with a roll angle of 275.1
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 (95.9810,12.8080) with a radius of 3.000 arc min
This is 1.714 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 6.79 sq. arc min or 0.24 of the BAT error circle
The XRT error circle is centered at (95.9572,12.8114) with a radius of 0.030 arc min
This is 0.330 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 3 of trigger 824063
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180410d11h11m44s834136usUT
Observation start time is 2018-04-10T08:17:49.9
Examining file ./824063_g889_uvot_catalog_image.fits
The exposure ID is 545041069
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 21 detected source(s) for 824063_g889
Aspect correction adds 0.00060 degrees (0.144 sec of time = 2.11 arc sec) to RA
Aspect correction adds -0.00015 degrees (-0.55 arcsec) to Dec
Total aspect correction is 2.18 arcsec
Star catalogs centered at 95.9467 , 12.8125 with radius 2.55 arc min.
n_usno: 219 n_gsc: 212
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 22 matched entries is 0.359" for 824063_g889
Mean and std. dev of mag. difference (MAG_DELTA) are 1.353 and 0.525 for 824063_g889
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 824063_g889.
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=95.9810 (06:23:55.44) DEC=12.8080 (+12:48:28.8)
XRT distances are from RA=95.9572 (06:23:49.72) DEC=12.8114 (+12:48:41.1)
Found 6 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
95.9573 12.8103 4.2 -1 USNO-B1 19.12 17.40 18.17
95.9586 12.8134 8.6 -1 USNO-B1 19.57 18.31 18.87
95.9588 12.8131 8.4 -1 USNO-B1 20.01 18.52 19.18
95.9593 12.8125 8.5 -1 USNO-B1 19.20 17.76 18.40
95.9573 12.8102 4.4 -1 GSC2.3 17.66 19.40 18.04
95.9593 12.8125 8.4 -1 GSC2.3 17.86 19.52 18.80
The closest star is 4.19" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=95.95716 (06:23:49.72) dec=12.81026 (+12:48:36.9) +/- 0.7" mag=19.46+/-0.17 dist=4.2 REFID=13 flag=0
Matched source ra=95.95951 (06:23:50.28) dec=12.81250 (+12:48:45.0) +/- 0.7" mag=19.43+/-0.17 dist=9.1 REFID=11 flag=0
There are 97145.359 counts in the bkg source region of 5693.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 17.064 counts/pixel (5-sig UL in 4" is 19.81 mag) for 824063_g889
There are 3679.7703 counts in the xrt source region of 199.00000 pixels.
Rate in xrt region with 8 arcsec radius is 18.491 counts/pixel for 824063_g889
There are 16870.660 counts in the xrt_bkg source region of 996.00000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 16.938 counts/pixel (5-sig UL in 4" is 19.81 mag) for 824063_g889
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 20.36, 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: 824063_545041069_180410d11h11m44s834136usUT_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(95.9518,12.8098,45")
fk5;-circle(95.9571597664142,12.8102562999746,6")
fk5;-circle(95.9595079953451,12.8124954464352,6")
fk5;-circle(95.9560887187741,12.8158368895784,6")
fk5;-circle(95.9603668261375,12.8167938344669,6")
fk5;-circle(95.9643074535258,12.8111730930571,6")
fk5;-circle(95.9642060239915,12.8146346287776,6")
fk5;-circle(95.9645756594495,12.807826601711,6")
fk5;-circle(95.9624041223104,12.8191688043084,6")
fk5;-circle(95.9488817920359,12.7968600304231,6")
Region file: 824063_545041069_180410d11h11m44s834136usUT_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(95.95717,12.81142,8")
Region file: 824063_545041069_180410d11h11m44s834136usUT_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(95.95717,12.81142,25")
fk5;-circle(95.95717,12.81142,15")
fk5;-circle(95.9595079953451,12.8124954464352,6")
fk5;-circle(95.9560887187741,12.8158368895784,6")
fk5;-circle(95.9603668261375,12.8167938344669,6")
fk5;-circle(95.9643074535258,12.8111730930571,6")
fk5;-circle(95.9642060239915,12.8146346287776,6")
fk5;-circle(95.9645756594495,12.807826601711,6")
image paragraph message for exposure 3 of trigger 824063
SRCLIST PROBLEM: srclist filled telemetry buffer
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
2 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB180410 (Swift/BAT trigger 824063) at 08:02:59 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 869 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 19.6 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 mag. No
correction has been made for the large, but uncertain, extinction expected.
------- notes for trigger 824063 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180410d11h11m51s263943usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=824063
-expid=545041069 -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/824063/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for xrt position. XRT position found for srclist.
XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 545041069.93508 or about 2018:100:08:17:44 UT
Found 2592 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 22% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 9 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 19.22 mag.
Found 21 source(s) in Genie image catalog. 2 source(s) are within 10.0" of the
xrt position. Found 0 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.36 mag. Found 215 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 22% of the Genie image region.
Genie image analysis:
Found 97145.4 counts in the large background region of 5693.0 pixels or a rate
of 17.064 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 19.81 mag. for a
4-arcsec aperture.
Found 3679.8 counts in the XRT position region of 199.0 pixels or a rate of
18.491 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 2.060 +/- 0.440 (1-sigma) cps or
19.00 mag and a range from 18.79 to 19.26 mag. The 3-sigma UL at the XRT
position is 3.380 cps or 18.46 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.48 mag. The closest
srclist source has ra= 95.9603 dec= 12.8167 mag=18.03 sep=21.83".
Found 2 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 95.9572 dec= 12.8103 mag=19.46 sep=4.19". The closest Genie
source has ra= 95.9572 dec= 12.8103 mag=19.46 sep=4.19".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 869 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 06:23:49.72 = 95.95716
DEC(J2000) = +12:48:36.9 = 12.81026
with a 90%-confidence error radius of about 0.68 arc sec. This position is 4.19
arc sec. from the center of the XRT error circle. The estimated magnitude is
19.46 with a 1-sigma error of about 0.17. No correction has been made for the
large, but uncertain, extinction expected.
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?
545041069 869 WHITE srclist found no candidates.
545041069 869 WHITE image found no candidates.
List afterglow candidates for other finding charts.
545040379 179 WHITE srclist found no candidates.
545040379 179 WHITE image found no candidates.
545040537 337 U srclist found no candidates.
545040537 337 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 12.81142
GRB_ERROR: 5
GRB_RA: 95.95717
IMAGE_START_TIME: 08:17:44
MAGNITUDE: 18.5
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT