srclist overlap message for exposure 1 of trigger 990358
uvot_overlap.pl vrs. 2010-12-20b fem started at 200817d01h59m13s409840usUT
The observation of trigger 990358 started 2020-08-17T01:55:14.0
Examining file 990358_g112_uvot_sky_srclist.fits
The exposure ID is 619322114
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (154.1298,-33.9155) with a roll angle of 350.5
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 (154.1310,-33.9210) with a radius of 3.000 arc min
This is 0.336 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
Could not find the location of an XRT error circle
srclist afterglow message for exposure 1 of trigger 990358
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200817d01h59m14s573992usUT
Observation start time is 2020-08-17T01:55:14.0
Examining file 990358_g112_uvot_catalog_srclist.fits
The exposure ID is 619322114
The exposure is 150.000 sec.
The bin size is 2 pixels
The filter is WHITE
There are 141 detected source(s) for 990358_g112
Aspect correction adds -0.00047 degrees (-0.113 sec of time = -1.41 arc sec) to RA
Aspect correction adds 0.00045 degrees ( 1.61 arcsec) to Dec
Total aspect correction is 2.14 arcsec
Star catalogs centered at 154.1323 , -33.9170 with radius 6.45 arc min.
n_usno: 686 n_gsc: 0
*** WARNING -- bright star catalog has 5 entries brighter than 12 mag
The brightest has mag 10.07854
RA DEC Mag Color
bright star 0: 154.16239 (10:16:38.97) -33.91751 (-33:55:03.1) 10.08 USNO-V
bright star 1: 154.17156 (10:16:41.17) -33.93304 (-33:55:59.0) 11.36 USNO-V
bright star 2: 154.19356 (10:16:46.45) -33.91610 (-33:54:58.0) 11.29 USNO-V
bright star 3: 154.06854 (10:16:16.45) -33.92523 (-33:55:30.8) 11.64 USNO-V
bright star 4: 154.11331 (10:16:27.20) -33.98837 (-33:59:18.1) 11.35 USNO-V
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 104 matched entries is 0.731" for 990358_g112
Mean and std. dev of mag. difference (MAG_DELTA) are 1.323 and 0.777 for 990358_g112
Found 43 entries without IDs and 3 entries that are acceptable afterglow candidates for 990358_g112.
Acceptable entries have no ID, BAT distance < 200" or XRT distance < 10", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
40 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=154.1310 (10:16:31.44) DEC=-33.9210 (-33:55:15.6)
XRT distances are as reported in catalog file.
*** WARNING 30 per cent of entries have no IDs.
-----------------
Entry 40 in the list of sources is a candidate afterglow for 990358_g112 with 3x3 stamp
ra=154.11399 (10:16:27.36) dec=-33.94625 (-33:56:46.5) +/- 1.1" mag=17.95+/-0.35
dist=104.1 REFID=71
src: 40 distr. of nearby unmatched sources: 1 1 0 0 0
Found 5 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
154.1198 -33.9462 17.3 -1 USNO-B1 20.85 18.39 19.48
154.1138 -33.9457 2.1 -1 USNO-B1 15.24 13.98 14.54 *
154.1126 -33.9457 4.6 -1 USNO-B1 99.99 13.75 99.99
154.1188 -33.9487 16.8 -1 USNO-B1 18.53 18.28 18.39
154.1194 -33.9489 18.7 -1 USNO-B1 18.59 18.68 18.64
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 42 in the list of sources is a candidate afterglow for 990358_g112 with 3x3 stamp
ra=154.11141 (10:16:26.74) dec=-33.94544 (-33:56:43.6) +/- 1.1" mag=18.55+/-0.35
dist=105.7 REFID=52
src: 42 distr. of nearby unmatched sources: 1 1 0 0 0
Found 2 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
154.1138 -33.9457 7.2 -1 USNO-B1 15.24 13.98 14.54
154.1126 -33.9457 3.7 -1 USNO-B1 99.99 13.75 99.99 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 85 in the list of sources is a candidate afterglow for 990358_g112 with 3x3 stamp
ra=154.08397 (10:16:20.15) dec=-33.89213 (-33:53:31.7) +/- 1.1" mag=18.48+/-0.35
dist=174.8 REFID=76
src: 85 srclist_match has ID
src: 85 distr. of nearby unmatched sources: 0 0 0 0 0
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
154.0876 -33.8932 11.6 -1 USNO-B1 16.97 15.00 15.88
154.0836 -33.8922 1.0 -1 USNO-B1 18.17 16.89 17.46 *
154.0817 -33.8925 7.0 -1 USNO-B1 16.24 14.70 15.38
154.0814 -33.8925 7.7 -1 USNO-B1 16.52 15.14 15.75
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.66, BAT distances < 200",
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 1 of trigger 990358
------ Start for Possible Stand-alone Circular ----
In response to GRB200817 (Swift/BAT trigger 990358) at 01:53:21 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of nominal 150.000 seconds with the White
filter starting 87 seconds after the BAT trigger. No credible afterglow
candidate has been found in the initial data products. Data from the 2.7'x2.7'
sub-image are not available at this time. The 8'x8' region for the list of
sources generated on-board covers 100% of the BAT 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 0.10.
------- notes for trigger 990358 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200817d01h59m16s863447usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=990358
-expid=619322114 -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/990358/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
*** Warning -- no exposure found, using srclist assumed value.
No XRT position found for srclist. BAT position found.
UVOT exposure began at MET 619322114.0348 or about 2020:230:01:55:09 UT
Found 682 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 11% of the srclist region. Found 141 sources in
srclist catalog. Found 43 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.66 mag.
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?
619322114 87 WHITE srclist found no candidates.
619322114 87 ? image data are not available.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -33.92100
GRB_ERROR: 200
GRB_RA: 154.13100
IMAGE_START_TIME: 01:55:09
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: BAT