image overlap message for exposure 2 of trigger 913302
uvot_overlap.pl vrs. 2010-12-20b fem started at 190706d15h30m55s857327usUT
The observation of trigger 913302 started 2019-07-06T12:46:25.4
Examining file ./913302_g334_uvot_sky_image.fits
The exposure ID is 584109985
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (107.4467,-29.5802) with a roll angle of 357.6
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 (107.4490,-29.5840) with a radius of 3.000 arc min
This is 0.254 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 (107.4621,-29.5529) with a radius of 0.030 arc min
This is 1.826 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 0.000 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 913302
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190706d15h31m12s467328usUT
Observation start time is 2019-07-06T12:46:25.4
Examining file ./913302_g334_uvot_catalog_image.fits
The exposure ID is 584109985
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 33 detected source(s) for 913302_g334
Aspect correction adds 0.00053 degrees (0.128 sec of time = 1.67 arc sec) to RA
Aspect correction adds 0.00072 degrees ( 2.58 arcsec) to Dec
Total aspect correction is 3.08 arcsec
Star catalogs centered at 107.4446 , -29.5788 with radius 2.69 arc min.
n_usno: 291 n_gsc: 0
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 10.50646
RA DEC Mag Color
bright star 0: 107.46158 (07:09:50.78) -29.59597 (-29:35:45.5) 10.51 USNO-V
bright star 1: 107.41026 (07:09:38.46) -29.59754 (-29:35:51.2) 11.40 USNO-V
Mean distance difference (CAT_DELTA) for 33 matched entries is 0.656" for 913302_g334
Mean and std. dev of mag. difference (MAG_DELTA) are 0.739 and 0.832 for 913302_g334
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 913302_g334.
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=107.4490 (07:09:47.76) DEC=-29.5840 (-29:35:02.4)
XRT distances are from RA=107.4621 (07:09:50.91) DEC=-29.5529 (-29:33:10.5)
-----------------
Entry 13 in the list of sources is a candidate afterglow for 913302_g334 with genie
ra=107.44314 (07:09:46.35) dec=-29.57251 (-29:34:21.0) +/- 0.6" mag=16.43+/-0.14
dist=92.3 REFID=15 major=1.1 minor=0.9 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 45.2 arc sec from the BAT position.
Found 3 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
107.4444 -29.5721 4.1 -1 USNO-B1 15.37 14.25 14.75
107.4446 -29.5720 5.1 -1 USNO-B1 15.68 14.90 15.24
107.4449 -29.5710 7.8 -1 USNO-B1 19.68 17.99 18.74
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 24 in the list of sources is a candidate afterglow for 913302_g334 with genie
ra=107.46757 (07:09:52.22) dec=-29.57048 (-29:34:13.7) +/- 0.6" mag=17.41+/-0.15
dist=65.5 REFID=10 major=5.7 minor=4.0 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 75.8 arc sec from the BAT position.
Found 8 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
107.4638 -29.5745 18.9 -1 USNO-B1 19.01 18.44 18.69
107.4650 -29.5743 15.9 -1 USNO-B1 20.63 18.70 19.56
107.4644 -29.5713 10.3 -1 USNO-B1 18.12 17.19 17.61
107.4624 -29.5676 19.2 -1 USNO-B1 18.90 18.55 18.71
107.4627 -29.5671 19.4 -1 USNO-B1 21.10 18.87 19.86
107.4681 -29.5678 9.6 -1 USNO-B1 12.16 12.31 12.24
107.4715 -29.5686 14.2 -1 USNO-B1 17.95 16.93 17.39
107.4731 -29.5699 17.4 -1 USNO-B1 19.76 19.52 19.63
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 5.7
Found 2 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
107.4611 -29.5554 9.6 -1 USNO-B1 19.55 18.66 19.05
107.4594 -29.5525 8.7 -1 USNO-B1 20.46 19.96 20.18
The closest star is 8.68" away.
List UVOT sources within 10" of the XRT position:
There are 24385.438 counts in the bkg source region of 5128.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 4.755 counts/pixel (5-sig UL in 4" is 19.62 mag) for 913302_g334
Do not compute counts in XRT region because position is too far from center.
There are 1 candidate(s) outside XRT error circle with mag < 19.61
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.17, 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: 913302_584109985_190706d15h31m12s467328usUT_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(107.4467,-29.5802,45")
fk5;-circle(107.450145710886,-29.5865665189331,6")
fk5;-circle(107.449416757724,-29.5793912230676,6")
fk5;-circle(107.449199279565,-29.5891224862794,6")
fk5;-circle(107.442392495643,-29.585475854008,6")
fk5;-circle(107.452098173942,-29.5772514128117,6")
fk5;-circle(107.446363237159,-29.5922870319878,6")
fk5;-circle(107.439248819005,-29.580794254926,6")
fk5;-circle(107.443183225657,-29.5936256057284,6")
fk5;-circle(107.457765165936,-29.5754421520301,6")
fk5;-circle(107.445215009188,-29.5720437544045,6")
fk5;-circle(107.44313577058,-29.5725127269488,6")
fk5;-circle(107.434698075874,-29.577143097297,6")
fk5;-circle(107.452471012318,-29.5680456437694,6")
fk5;-circle(107.4553615393,-29.5684625202672,6")
fk5;-circle(107.435941167055,-29.5701799951822,6")
image paragraph message for exposure 2 of trigger 913302
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no overlap
SRCLIST PROBLEM: srclist filled telemetry buffer
See notes for more details.
------ Start for Possible Stand-alone Circular ----
In response to GRB190706 (Swift/BAT trigger 913302) at 12:40:50 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
312 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 none of the
XRT error circle. The 8'x8' region for the list of sources generated on-board
covers 100% of the XRT error circle. The limiting magnitude for the list of
sources is expected to be about 17.8. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.15.
------- notes for trigger 913302 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190706d15h31m16s197616usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=913302
-expid=584109985 -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/913302/
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 584109985.41372 or about 2019:187:12:46:20 UT
Found 2975 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 25% 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 18.12 mag.
Found 33 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 20.17 mag. Found 287 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
27% of the Genie image region.
Genie image analysis:
Found 24385.4 counts in the large background region of 5128.0 pixels or a rate
of 4.755 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 19.66 mag. for a
4-arcsec aperture. The number of srclist sources filled the available
telemetry. The weakest source detected was 17.89 mag. The closest srclist
source has ra= 107.4505 dec= -29.5582 mag=16.26 sep=41.12". The closest Genie
source has ra= 107.4504 dec= -29.5582 mag=15.83 sep=41.32".
This paragraph is only useful if the XRT position is grossly wrong. There are 1
candidate(s) in the image data with mag < 19.61 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=107.44314
(07:09:46.35), DEC=-29.57251 (-29:34:21.0) (J2000). It has a mag of 16.43. It
is 45.2" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 250 seconds with the U filter starting
312 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 07:09:46.35 = 107.44314
DEC(J2000) = -29:34:21.0 = -29.57251
with a 90%-confidence error radius of about 0.62 arc sec. The estimated
magnitude is 16.43 with a 1-sigma error of about 0.14. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.15.
This paragraph is only useful if the XRT position is grossly wrong. There are 1
candidate(s) in the srclist data with mag < 17.56 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=107.44295
(07:09:46.31), DEC=-29.57257 (-29:34:21.3) (J2000). It has a mag of 16.88. It
is 45.3" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 250 seconds with the U filter starting
312 seconds after the BAT trigger. There is a candidate afterglow in the list
of sources generated on-board at
RA(J2000) = 07:09:46.31 = 107.44295
DEC(J2000) = -29:34:21.3 = -29.57257
with a 90%-confidence error radius of about 1.10 arc sec. The estimated
magnitude is 16.88 with a 1-sigma error of about 0.35. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.15.
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?
584109985 311 U srclist found no candidates.
584109985 311 U image found no candidates.
List afterglow candidates for other finding charts.
584109773 99 WHITE srclist found no candidates.
584109773 99 WHITE image found no candidates.
584110541 867 WHITE srclist found no candidates.
584110541 867 WHITE image found no candidates.
------- Tokens for Quick GCN -------