srclist overlap message for exposure 1 of trigger 831816
uvot_overlap.pl vrs. 2010-12-20b fem started at 180511d00h23m28s065072usUT
The observation of trigger 831816 started 2018-05-10T21:05:16.9
Examining file ./831816_g2973_uvot_sky_srclist.fits
The exposure ID is 547679116
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (77.9872,-62.3310) with a roll angle of 331.2
It is square with sides of 8.03 arc min. for an area of 64.51 sq arc min
The BAT error circle is centered at (77.9890,-62.3350) with a radius of 3.000 arc min
This is 0.244 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 (77.9690,-62.3241) with a radius of 0.025 arc min
This is 0.655 arc min from the center of the uvot region
The area of the XRT error circle is 0.002 sq. arc min
The UVOT/XRT overlap is 0.002 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 1 of trigger 831816
find_uvot_ag.pl vrs. 2017-02-17 fem started at 180511d00h23m29s095667usUT
Observation start time is 2018-05-10T21:05:16.9
Examining file ./831816_g2973_uvot_catalog_srclist.fits
The exposure ID is 547679116
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 37 detected source(s) for 831816_g2973
Aspect correction adds 0.00077 degrees (0.185 sec of time = 1.29 arc sec) to RA
Aspect correction adds -0.00017 degrees (-0.63 arcsec) to Dec
Total aspect correction is 1.43 arcsec
Star catalogs centered at 77.9882 , -62.3307 with radius 5.62 arc min.
n_usno: 880 n_gsc: 811
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.54184
RA DEC Mag Color
bright star 0: 77.89352 (05:11:34.45) -62.35991 (-62:21:35.7) 11.54 USNO-V
Mean distance difference (CAT_DELTA) for 37 matched entries is 0.732" for 831816_g2973
Mean and std. dev of mag. difference (MAG_DELTA) are 1.372 and 0.945 for 831816_g2973
Found 6 entries without IDs and 4 entries that are acceptable afterglow candidates for 831816_g2973.
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.
1 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=77.9890 (05:11:57.36) DEC=-62.3350 (-62:20:06.0)
XRT distances are from RA=77.9690 (05:11:52.56) DEC=-62.3241 (-62:19:26.8)
-----------------
Entry 3 in the list of sources is a candidate afterglow for 831816_g2973 with 5x5 stamp
ra=77.96970 (05:11:52.73) dec=-62.32402 (-62:19:26.5) +/- 1.1" mag=18.75+/-0.35
dist=1.2 REFID=31
src: 3 distr. of nearby unmatched sources: 0 0 0 0 0
Found 7 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
77.9755 -62.3257 11.5 -1 USNO-B1 21.39 20.38 20.83
77.9795 -62.3233 16.5 -1 USNO-B1 14.70 14.03 14.33
77.9660 -62.3197 16.7 -1 USNO-B1 21.05 19.05 19.94
77.9598 -62.3229 17.0 -1 USNO-B1 21.64 20.13 20.80
77.9793 -62.3233 16.3 -1 GSC2.3 13.81 14.64 14.18
77.9671 -62.3204 13.9 -1 GSC2.3 20.23 21.76 99.99
77.9595 -62.3228 17.6 -1 GSC2.3 99.99 22.07 99.99
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
-----------------
Entry 17 in the list of sources is a candidate afterglow for 831816_g2973 with 5x5 stamp
ra=78.04749 (05:12:11.40) dec=-62.29077 (-62:17:26.8) +/- 1.1" mag=18.64+/-0.35
dist=178.0 REFID=34
*** The position of this source is inconsistent with the XRT position.
The position is 186.9 arc sec from the BAT position.
src: 17 srclist_match has ID
src: 17 distr. of nearby unmatched sources: 2 0 1 0 0
Found 16 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
78.0447 -62.2959 19.0 -1 USNO-B1 19.54 17.09 18.18
78.0404 -62.2941 16.9 -1 USNO-B1 99.99 18.96 99.99
78.0420 -62.2939 14.7 -1 USNO-B1 20.46 19.91 20.15
78.0464 -62.2939 11.5 -1 USNO-B1 19.38 18.47 18.87
78.0505 -62.2940 12.7 -1 USNO-B1 20.39 18.54 19.36
78.0467 -62.2902 2.5 -1 USNO-B1 16.75 15.05 15.80 *
78.0465 -62.2898 3.8 -1 USNO-B1 16.50 15.16 15.75 *
78.0460 -62.2881 10.1 -1 USNO-B1 19.46 14.93 16.94
78.0468 -62.2880 10.0 -1 USNO-B1 16.23 15.80 15.99
78.0470 -62.2878 10.7 -1 USNO-B1 16.30 15.70 15.96
78.0416 -62.2937 14.4 -1 GSC2.3 19.74 21.02 99.99
78.0462 -62.2938 11.3 -1 GSC2.3 18.65 19.72 99.99
78.0473 -62.2907 0.4 -1 GSC2.3 99.99 99.99 99.99 *
78.0466 -62.2901 2.7 -1 GSC2.3 15.08 15.86 16.22 *
78.0459 -62.2896 4.9 -1 GSC2.3 99.99 99.99 99.99
78.0471 -62.2877 11.2 -1 GSC2.3 15.62 16.75 16.26
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 18 in the list of sources is a candidate afterglow for 831816_g2973 with 5x5 stamp
ra=78.04594 (05:12:11.02) dec=-62.28928 (-62:17:21.4) +/- 1.1" mag=18.46+/-0.35
dist=179.8 REFID=22
*** The position of this source is inconsistent with the XRT position.
The position is 190.2 arc sec from the BAT position.
src: 18 srclist_match has ID
src: 18 distr. of nearby unmatched sources: 2 1 0 0 0
Found 15 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
78.0404 -62.2941 19.7 -1 USNO-B1 99.99 18.96 99.99
78.0420 -62.2939 18.1 -1 USNO-B1 20.46 19.91 20.15
78.0464 -62.2939 16.8 -1 USNO-B1 19.38 18.47 18.87
78.0505 -62.2940 18.7 -1 USNO-B1 20.39 18.54 19.36
78.0467 -62.2902 3.5 -1 USNO-B1 16.75 15.05 15.80 *
78.0465 -62.2898 2.2 -1 USNO-B1 16.50 15.16 15.75 *
78.0460 -62.2881 4.4 -1 USNO-B1 19.46 14.93 16.94
78.0468 -62.2880 4.8 -1 USNO-B1 16.23 15.80 15.99
78.0470 -62.2878 5.6 -1 USNO-B1 16.30 15.70 15.96
78.0416 -62.2937 17.5 -1 GSC2.3 19.74 21.02 99.99
78.0462 -62.2938 16.5 -1 GSC2.3 18.65 19.72 99.99
78.0473 -62.2907 5.6 -1 GSC2.3 99.99 99.99 99.99
78.0466 -62.2901 3.3 -1 GSC2.3 15.08 15.86 16.22 *
78.0459 -62.2896 1.2 -1 GSC2.3 99.99 99.99 99.99 *
78.0471 -62.2877 6.1 -1 GSC2.3 15.62 16.75 16.26
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 26 in the list of sources is a candidate afterglow for 831816_g2973 with 5x5 stamp
ra=78.04682 (05:12:11.24) dec=-62.28685 (-62:17:12.7) +/- 1.1" mag=18.91+/-0.35
dist=187.0 REFID=32
*** The position of this source is inconsistent with the XRT position.
The position is 198.5 arc sec from the BAT position.
src: 26 distr. of nearby unmatched sources: 0 0 2 0 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
78.0467 -62.2902 12.0 -1 USNO-B1 16.75 15.05 15.80
78.0465 -62.2898 10.7 -1 USNO-B1 16.50 15.16 15.75
78.0460 -62.2881 4.5 -1 USNO-B1 19.46 14.93 16.94
78.0468 -62.2880 4.1 -1 USNO-B1 16.23 15.80 15.99
78.0470 -62.2878 3.5 -1 USNO-B1 16.30 15.70 15.96 *
78.0473 -62.2907 13.9 -1 GSC2.3 99.99 99.99 99.99
78.0466 -62.2901 11.9 -1 GSC2.3 15.08 15.86 16.22
78.0459 -62.2896 10.0 -1 GSC2.3 99.99 99.99 99.99
78.0471 -62.2877 3.0 -1 GSC2.3 15.62 16.75 16.26 *
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:
Unmatched source ra=77.96970 (05:11:52.73) dec=-62.32402 (-62:19:26.5) +/- 1.1" mag=18.75+/-0.35 dist=1.2 REFID=31
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: 1 good candidate(s) found.
srclist paragraph message for exposure 1 of trigger 831816
------ Start for Possible Stand-alone Circular ----
In response to GRB180510 (Swift/BAT trigger 831816) at 20:15:42 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 2953 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 05:11:52.64 = 77.96932
DEC(J2000) = -62:19:26.3 = -62.32396
with a 90%-confidence error radius of about 0.76 arc sec. This position is 0.8
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.25 with a 1-sigma error of about 0.15. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.03.
------- notes for trigger 831816 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 180511d00h23m33s025952usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=831816
-expid=547679116 -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/831816/
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 547679116.92366 or about 2018:130:21:05:11 UT
Found 876 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 19% of the srclist region. Found 37 sources in
srclist catalog. Found 6 srclist source(s) without IDs. There are 1 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
Found 7 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 138 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 17% 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?
547679116 2952 WHITE 77.96970 -62.32402 18.75/19.2 1.2 srclist Yes
547679116 2952 WHITE 77.96932 -62.32396 18.25/20.1 0.8 image Yes
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -62.32396
GRB_ERROR: 0.76
GRB_RA: 77.96932
IMAGE_START_TIME: 21:05:11
MAGNITUDE: 18.25
MAG_ERROR: 0.15
MESSAGE_TYPE: ACK
SOURCE: XRT