image overlap message for exposure 3 of trigger 811561
uvot_overlap.pl vrs. 2010-12-20b fem started at 180225d00h59m21s970124usUT
The observation of trigger 811561 started 2018-02-24T22:36:03.6
Examining file ./811561_g895_uvot_sky_image.fits
The exposure ID is 541204563
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (202.6653,38.0916) with a roll angle of 66.1
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 (202.6610,38.0880) with a radius of 3.000 arc min
This is 0.299 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 (202.6838,38.0787) with a radius of 0.028 arc min
This is 1.167 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 811561
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180225d00h59m35s199617usUT
Observation start time is 2018-02-24T22:36:03.6
Examining file ./811561_g895_uvot_catalog_image.fits
The exposure ID is 541204563
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 11 detected source(s) for 811561_g895
Aspect correction adds 0.00037 degrees (0.088 sec of time = 1.04 arc sec) to RA
Aspect correction adds 0.00009 degrees ( 0.33 arcsec) to Dec
Total aspect correction is 1.09 arcsec
Star catalogs centered at 202.6607 , 38.0900 with radius 2.39 arc min.
n_usno: 50 n_gsc: 45
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 6 matched entries is 0.203" for 811561_g895
Mean and std. dev of mag. difference (MAG_DELTA) are 0.599 and 0.460 for 811561_g895
Found 5 entries without IDs and 5 entries that are acceptable afterglow candidates for 811561_g895.
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=202.6610 (13:30:38.64) DEC=38.0880 (+38:05:16.8)
XRT distances are from RA=202.6838 (13:30:44.12) DEC=38.0787 (+38:04:43.5)
*** WARNING 45 per cent of entries have no IDs.
-----------------
Entry 4 in the list of sources is a candidate afterglow for 811561_g895 with genie
ra=202.64984 (13:30:35.96) dec=38.10091 (+38:06:03.3) +/- 0.6" mag=18.24+/-0.15
dist=125.0 REFID=7 major=6.6 minor=1.6 flag=2 (blended)
*** The position of this source is inconsistent with the XRT position.
The position is 56.2 arc sec from the BAT position.
Found 2 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
202.6474 38.1048 15.7 -1 USNO-B1 13.71 12.28 12.91
202.6474 38.1048 15.6 -1 GSC2.3 12.42 13.47 12.78
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 6.6
-----------------
Entry 5 in the list of sources is a candidate afterglow for 811561_g895 with genie
ra=202.64641 (13:30:35.14) dec=38.10074 (+38:06:02.6) +/- 0.7" mag=20.04+/-0.19
dist=132.3 REFID=8 major=3.6 minor=2.7 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 61.7 arc sec from the BAT position.
Found 3 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
202.6474 38.1048 15.0 -1 USNO-B1 13.71 12.28 12.91
202.6441 38.1047 15.6 -1 USNO-B1 21.04 19.69 20.29
202.6474 38.1048 14.9 -1 GSC2.3 12.42 13.47 12.78
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 3.6
-----------------
Entry 6 in the list of sources is a candidate afterglow for 811561_g895 with genie
ra=202.64524 (13:30:34.86) dec=38.10084 (+38:06:03.0) +/- 0.6" mag=17.83+/-0.14
dist=135.2 REFID=6 major=5.4 minor=2.5 flag=18 (blended+aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 64.3 arc sec from the BAT position.
Found 3 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
202.6474 38.1048 15.7 -1 USNO-B1 13.71 12.28 12.91
202.6441 38.1047 14.2 -1 USNO-B1 21.04 19.69 20.29
202.6474 38.1048 15.5 -1 GSC2.3 12.42 13.47 12.78
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 5.4
-----------------
Entry 8 in the list of sources is a candidate afterglow for 811561_g895 with genie
ra=202.64979 (13:30:35.95) dec=38.10906 (+38:06:32.6) +/- 0.6" mag=18.66+/-0.15
dist=145.6 REFID=4 major=6.6 minor=2.0 flag=18 (blended+aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 82.2 arc sec from the BAT position.
Found 4 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
202.6474 38.1048 16.6 -1 USNO-B1 13.71 12.28 12.91
202.6508 38.1118 10.4 -1 USNO-B1 17.74 15.59 16.54
202.6474 38.1048 16.8 -1 GSC2.3 12.42 13.47 12.78
202.6508 38.1118 10.1 -1 GSC2.3 15.86 17.46 99.99
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 6.6
-----------------
Entry 9 in the list of sources is a candidate afterglow for 811561_g895 with genie
ra=202.64489 (13:30:34.77) dec=38.10880 (+38:06:31.7) +/- 0.6" mag=18.11+/-0.15
dist=154.5 REFID=3 major=4.4 minor=2.5 flag=2 (blended)
*** The position of this source is inconsistent with the XRT position.
The position is 87.7 arc sec from the BAT position.
Found 5 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
202.6474 38.1048 16.0 -1 USNO-B1 13.71 12.28 12.91
202.6441 38.1047 15.0 -1 USNO-B1 21.04 19.69 20.29
202.6508 38.1118 19.9 -1 USNO-B1 17.74 15.59 16.54
202.6474 38.1048 16.1 -1 GSC2.3 12.42 13.47 12.78
202.6508 38.1118 19.8 -1 GSC2.3 15.86 17.46 99.99
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 4.4
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 55842.395 counts in the bkg source region of 5851.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 9.544 counts/pixel (5-sig UL in 4" is 20.12 mag) for 811561_g895
There are 1930.6938 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 9.605 counts/pixel for 811561_g895
XRT source is too far (69.9737923854808") from center -- do not compute local background.
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 20.68, 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: 811561_541204563_180225d00h59m35s199617usUT_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(202.6653,38.0916,45")
fk5;-circle(202.659104836481,38.0914312253885,6")
fk5;-circle(202.653715963994,38.0882691592216,6")
fk5;-circle(202.66729774493,38.0933670324071,6")
fk5;-circle(202.676437745735,38.0890245855849,6")
Region file: 811561_541204563_180225d00h59m35s199617usUT_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(202.68383,38.07875,8")
image paragraph message for exposure 3 of trigger 811561
------ Start for Possible Stand-alone Circular ----
In response to GRB180224 (Swift/BAT trigger 811561) at 22:21:07 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 875 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 expected extinction corresponding to E(B-V) of
0.01.
------- notes for trigger 811561 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180225d00h59m37s416300usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=811561
-expid=541204563 -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/811561/
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 541204563.5963 or about 2018:055:22:35:58 UT
Found 324 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 31 sources in
srclist catalog. Found 2 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 11 source(s) in Genie image catalog. Found 5 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.68 mag. Found 46 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
5% of the Genie image region.
Genie image analysis:
Found 55842.4 counts in the large background region of 5851.0 pixels or a rate
of 9.544 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 20.13 mag. for a
4-arcsec aperture.
Found 1930.7 counts in the XRT position region of 201.0 pixels or a rate of
9.605 counts/pixel in a radius of 8.0 arcsec. The net count rate (using large
background region) at the XRT position is 0.082 +/- 0.298 (1-sigma) cps or
22.49 mag and a range from 20.83 to 99.99 mag. The 3-sigma UL at the XRT
position is 0.976 cps or 19.81 mag. The closest srclist source has ra= 202.6827
dec= 38.0629 mag=14.87 sep=57.00". The closest Genie source has ra= 202.6764
dec= 38.0890 mag=20.90 sep=42.51".
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?
541204563 874 WHITE srclist found no candidates.
541204563 874 WHITE image found no candidates.
List afterglow candidates for other finding charts.
541203773 84 WHITE 202.68372 38.07918 19.43/19.2 1.6 srclist Yes
541203773 84 WHITE 202.68370 38.07906 18.94/20.9 1.2 image Yes
541203985 296 U srclist found no candidates.
541203985 296 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 38.07875
GRB_ERROR: 5
GRB_RA: 202.68383
IMAGE_START_TIME: 22:35:58
MAGNITUDE: 19.8
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT