srclist overlap message for exposure 2 of trigger 924641
uvot_overlap.pl vrs. 2010-12-20b fem started at 190910d07h14m37s497161usUT
The observation of trigger 924641 started 2019-09-10T07:07:16.9
Examining file 924641_g286_uvot_sky_srclist.fits
The exposure ID is 589792036
The exposure time is undefined.
The filter is U.
The uvot region is centered at (272.0280,13.2503) with a roll angle of 278.2
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 (272.0700,13.2580) with a radius of 3.000 arc min
This is 2.494 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 24.18 sq. arc min or 0.86 of the BAT error circle
The XRT error circle is centered at (272.0331,13.2514) with a radius of 0.092 arc min
This is 0.303 arc min from the center of the uvot region
The area of the XRT error circle is 0.026 sq. arc min
The UVOT/XRT overlap is 0.026 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 2 of trigger 924641
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190910d07h14m39s019483usUT
Observation start time is 2019-09-10T07:07:16.9
Examining file 924641_g286_uvot_catalog_srclist.fits
The exposure ID is 589792036
The exposure is 250.000 sec.
The bin size is 2 pixels
The filter is U
There are 190 detected source(s) for 924641_g286
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 0.746
srclist_overlap returned: xrt_overlap 1.000
Dimmest detected source in 924641_g286 has mag 18.96
Aspect correction adds -0.00146 degrees (-0.349 sec of time = -5.10 arc sec) to RA
Aspect correction adds -0.00039 degrees (-1.42 arcsec) to Dec
Total aspect correction is 5.29 arcsec
Star catalogs centered at 272.0292 , 13.2510 with radius 6.17 arc min.
n_usno: 1366 n_gsc: 0
*** WARNING -- bright star catalog has 3 entries brighter than 12 mag
The brightest has mag 10.72072
RA DEC Mag Color
bright star 0: 272.03770 (18:08:09.05) 13.20838 (+13:12:30.2) 11.91 USNO-V
bright star 1: 272.07927 (18:08:19.02) 13.29288 (+13:17:34.4) 10.72 USNO-V
bright star 2: 272.08467 (18:08:20.32) 13.18783 (+13:11:16.2) 11.47 USNO-V
Mean distance difference (CAT_DELTA) for 144 matched entries is 0.838" for 924641_g286
Mean and std. dev of mag. difference (MAG_DELTA) are 2.118 and 0.771 for 924641_g286
Found 49 entries without IDs and 4 entries that are acceptable afterglow candidates for 924641_g286.
Acceptable entries have no ID, XRT distances < 13.75", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
32 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=272.0700 (18:08:16.80) DEC=13.2580 (+13:15:28.8)
XRT distances are from RA=272.0331 (18:08:07.94) DEC=13.2514 (+13:15:05.0)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 924641_g286 with 3x3 stamp
ra=272.03139 (18:08:07.53) dec=13.25172 (+13:15:06.2) +/- 1.1" mag=16.52+/-0.35
dist=6.1 REFID=14
src: 0 distr. of nearby unmatched sources: 0 0 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
272.0269 13.2519 15.7 -1 USNO-B1 18.66 19.11 18.91
272.0299 13.2546 11.5 -1 USNO-B1 17.02 16.11 16.51
272.0273 13.2541 16.9 -1 USNO-B1 20.23 19.08 19.59
272.0290 13.2472 18.3 -1 USNO-B1 20.51 18.96 19.65
272.0322 13.2536 7.4 -1 USNO-B1 19.34 18.41 18.82
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
-----------------
Entry 13 in the list of sources is a candidate afterglow for 924641_g286 with 1x1 stamp
ra=272.01427 (18:08:03.42) dec=13.24937 (+13:14:57.7) +/- 1.1" mag=18.65+/-0.35
dist=66.4 REFID=143
*** The position of this source is inconsistent with the XRT position.
The position is 197.7 arc sec from the BAT position.
src: 13 distr. of nearby unmatched sources: 0 0 0 0 0
Found 6 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
272.0166 13.2498 8.3 -1 USNO-B1 16.33 15.29 15.75
272.0156 13.2476 8.0 -1 USNO-B1 20.06 99.99 99.99
272.0151 13.2496 2.9 -1 USNO-B1 16.88 16.01 16.40 *
272.0126 13.2536 16.3 -1 USNO-B1 20.34 18.93 19.56
272.0107 13.2511 14.1 -1 USNO-B1 19.64 18.31 18.90
272.0094 13.2509 17.9 -1 USNO-B1 18.73 17.61 18.10
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 56 in the list of sources is a candidate afterglow for 924641_g286 with 1x1 stamp
ra=272.08004 (18:08:19.21) dec=13.24153 (+13:14:29.5) +/- 1.1" mag=18.65+/-0.35
dist=168.3 REFID=135
*** The position of this source is inconsistent with the XRT position.
The position is 68.9 arc sec from the BAT position.
src: 56 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
272.0750 13.2427 18.1 -1 USNO-B1 20.41 18.57 19.39
272.0749 13.2411 18.1 -1 USNO-B1 99.99 18.86 99.99
272.0789 13.2454 14.5 -1 USNO-B1 99.99 19.02 99.99
272.0796 13.2428 4.7 -1 USNO-B1 14.47 13.66 14.02
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 75 in the list of sources is a candidate afterglow for 924641_g286 with 1x1 stamp
ra=272.07254 (18:08:17.41) dec=13.21089 (+13:12:39.2) +/- 1.1" mag=18.65+/-0.35
dist=201.0 REFID=190
*** The position of this source is inconsistent with the XRT position.
The position is 169.8 arc sec from the BAT position.
src: 75 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
272.0730 13.2126 6.5 -1 USNO-B1 18.61 17.28 17.87
272.0723 13.2116 2.7 -1 USNO-B1 16.54 15.05 15.71 *
272.0697 13.2076 15.4 -1 USNO-B1 19.91 18.55 19.15
272.0770 13.2093 16.7 -1 USNO-B1 19.28 18.20 18.68
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 1 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
272.0322 13.2536 8.5 -1 USNO-B1 19.34 18.41 18.82
The closest star is 8.49" away.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=272.03139 (18:08:07.53) dec=13.25172 (+13:15:06.2) +/- 1.1" mag=16.52+/-0.35 dist=6.1 REFID=14
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.12, XRT distances < 13.75",
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 2 of trigger 924641
------ Start for Possible Stand-alone Circular ----
In response to GRB190910 (Swift/BAT trigger 924641) at 07:02:29 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of nominal 250.000 seconds with the U filter
starting 263 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 18:08:07.53 = 272.03139
DEC(J2000) = +13:15:06.2 = 13.25172
with a 90%-confidence error radius of about 1.10 arc sec. This position is 6.1
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.52. No correction has been made for the expected extinction corresponding to
E(B-V) of 0.15.
------- notes for trigger 924641 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 190910d07h14m42s071652usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=924641
-expid=589792036 -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/924641/
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.
XRT position found for srclist. BAT position found.
UVOT exposure began at MET 589792036.92882 or about 2019:253:07:07:11 UT
Found 1362 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 24% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 49 srclist
source(s) without IDs. There are 1 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.12 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?
589792036 263 U 272.03139 13.25172 16.52/18.1 6.1 srclist Yes
589792036 263 ? image data are not available.
List afterglow candidates for other finding charts.
589791877 104 WHITE 272.03134 13.25146 17.00/19.2 6.2 srclist Yes
589791877 104 WHITE 272.03143 13.25159 16.17/20.7 5.9 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: 13.25172
GRB_ERROR: 1.10
GRB_RA: 272.03139
IMAGE_START_TIME: 07:07:11
MAGNITUDE: 16.52
MAG_ERROR: 0.4
MESSAGE_TYPE: ACK
SOURCE: XRT