srclist overlap message for exposure 3 of trigger 811561
uvot_overlap.pl vrs. 2010-12-20b fem started at 180225d00h59m20s704800usUT
The observation of trigger 811561 started 2018-02-24T22:36:03.6
Examining file ./811561_g895_uvot_sky_srclist.fits
The exposure ID is 541204563
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (202.6645,38.0910) with a roll angle of 66.1
It is square with sides of 12.05 arc min. for an area of 145.15 sq arc min
The BAT error circle is centered at (202.6610,38.0880) with a radius of 3.000 arc min
This is 0.245 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 28.27 sq. arc min or 1.00 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 1.172 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
srclist afterglow message for exposure 3 of trigger 811561
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180225d00h59m34s410995usUT
Observation start time is 2018-02-24T22:36:03.6
Examining file ./811561_g895_uvot_catalog_srclist.fits
The exposure ID is 541204563
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 31 detected source(s) for 811561_g895
Aspect correction adds 0.00035 degrees (0.085 sec of time = 1.00 arc sec) to RA
Aspect correction adds 0.00001 degrees ( 0.05 arcsec) to Dec
Total aspect correction is 1.00 arcsec
Star catalogs centered at 202.6555 , 38.0969 with radius 7.05 arc min.
n_usno: 328 n_gsc: 286
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 10.40246
RA DEC Mag Color
bright star 0: 202.64026 (13:30:33.66) 38.20191 (+38:12:06.9) 10.40 USNO-V
Mean distance difference (CAT_DELTA) for 29 matched entries is 0.507" for 811561_g895
Mean and std. dev of mag. difference (MAG_DELTA) are 1.020 and 1.048 for 811561_g895
Found 2 entries without IDs and 2 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.
0 sources matched bright stars.
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)
-----------------
Entry 9 in the list of sources is a candidate afterglow for 811561_g895 with 5x5 stamp
ra=202.70049 (13:30:48.12) dec=38.11129 (+38:06:40.6) +/- 1.1" mag=19.84+/-0.35
dist=126.3 REFID=30
*** The position of this source is inconsistent with the XRT position.
The position is 139.8 arc sec from the BAT position.
src: 9 distr. of nearby unmatched sources: 0 1 1 0 2
Found 10 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
202.6971 38.1104 10.1 -1 USNO-B1 20.64 19.96 20.26
202.6955 38.1136 16.4 -1 USNO-B1 19.26 18.88 19.05
202.6971 38.1137 13.0 -1 USNO-B1 19.56 17.63 18.49
202.6998 38.1124 4.5 -1 USNO-B1 12.89 12.31 12.57 *
202.7000 38.1158 16.3 -1 USNO-B1 18.81 19.25 19.06
202.7002 38.1155 15.2 -1 USNO-B1 19.91 18.73 19.25
202.7029 38.1112 7.0 -1 USNO-B1 20.17 19.34 19.71
202.7053 38.1133 15.6 -1 USNO-B1 19.66 15.62 17.41
202.6993 38.1075 13.9 -1 GSC2.3 99.99 21.97 99.99
202.6998 38.1125 4.7 -1 GSC2.3 12.96 13.33 14.32 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 11 in the list of sources is a candidate afterglow for 811561_g895 with 5x5 stamp
ra=202.70081 (13:30:48.19) dec=38.11354 (+38:06:48.7) +/- 1.1" mag=19.82+/-0.35
dist=134.2 REFID=31
*** The position of this source is inconsistent with the XRT position.
The position is 145.5 arc sec from the BAT position.
src: 11 distr. of nearby unmatched sources: 0 1 2 1 0
Found 9 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
202.6971 38.1104 15.3 -1 USNO-B1 20.64 19.96 20.26
202.6955 38.1136 15.0 -1 USNO-B1 19.26 18.88 19.05
202.6971 38.1137 10.6 -1 USNO-B1 19.56 17.63 18.49
202.6998 38.1124 4.8 -1 USNO-B1 12.89 12.31 12.57 *
202.7000 38.1158 8.5 -1 USNO-B1 18.81 19.25 19.06
202.7002 38.1155 7.3 -1 USNO-B1 19.91 18.73 19.25
202.7029 38.1112 10.4 -1 USNO-B1 20.17 19.34 19.71
202.7053 38.1133 12.9 -1 USNO-B1 19.66 15.62 17.41
202.6998 38.1125 4.8 -1 GSC2.3 12.96 13.33 14.32 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
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 19.22, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
srclist 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 180225d00h59m36s091103usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=811561
-expid=541204563 -meonly -msg_srclist
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