srclist overlap message for exposure 1 of trigger 924641
uvot_overlap.pl vrs. 2010-12-20b fem started at 190910d07h08m29s486076usUT
The observation of trigger 924641 started 2019-09-10T07:04:38.0
Examining file 924641_g127_uvot_sky_srclist.fits
The exposure ID is 589791877
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (272.0274,13.2492) 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 2.544 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 23.96 sq. arc min or 0.85 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 0.359 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 1 of trigger 924641
find_uvot_ag.pl vrs. 2017-02-17 fem started at 190910d07h08m31s278027usUT
Observation start time is 2019-09-10T07:04:38.0
Examining file 924641_g127_uvot_catalog_srclist.fits
The exposure ID is 589791877
The exposure is 150.000 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 924641_g127
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 0.727
srclist_overlap returned: xrt_overlap 1.000
Dimmest detected source in 924641_g127 has mag 19.35
Aspect correction adds -0.00158 degrees (-0.380 sec of time = -5.55 arc sec) to RA
Aspect correction adds -0.00011 degrees (-0.40 arcsec) to Dec
Total aspect correction is 5.56 arcsec
Star catalogs centered at 272.0272 , 13.2480 with radius 6.35 arc min.
n_usno: 1453 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 180 matched entries is 0.690" for 924641_g127
Mean and std. dev of mag. difference (MAG_DELTA) are 1.838 and 0.526 for 924641_g127
Found 17 entries without IDs and 2 entries that are acceptable afterglow candidates for 924641_g127.
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.
4 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_g127 with 3x3 stamp
ra=272.03134 (18:08:07.52) dec=13.25146 (+13:15:05.2) +/- 1.1" mag=17.00+/-0.35
dist=6.2 REFID=29
src: 0 distr. of nearby unmatched sources: 0 0 0 0 0
Found 6 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
272.0290 13.2472 17.4 -1 USNO-B1 20.51 18.96 19.65
272.0269 13.2519 15.6 -1 USNO-B1 18.66 19.11 18.91
272.0273 13.2541 17.2 -1 USNO-B1 20.23 19.08 19.59
272.0334 13.2463 19.9 -1 USNO-B1 18.69 17.62 18.09
272.0299 13.2546 12.3 -1 USNO-B1 17.02 16.11 16.51
272.0322 13.2536 8.3 -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 9 in the list of sources is a candidate afterglow for 924641_g127 with 3x3 stamp
ra=272.02131 (18:08:05.11) dec=13.24251 (+13:14:33.0) +/- 1.1" mag=18.27+/-0.35
dist=52.3 REFID=72
*** The position of this source is inconsistent with the XRT position.
The position is 179.5 arc sec from the BAT position.
src: 9 distr. of nearby unmatched sources: 1 0 0 0 0
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
272.0229 13.2432 6.2 -1 USNO-B1 18.10 17.77 17.91
272.0219 13.2427 2.1 -1 USNO-B1 16.59 16.01 16.27 *
272.0242 13.2396 14.7 -1 USNO-B1 19.77 18.69 19.17
272.0184 13.2415 10.7 -1 USNO-B1 99.99 18.74 99.99
272.0158 13.2437 19.7 -1 USNO-B1 17.36 16.41 16.83
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=272.03134 (18:08:07.52) dec=13.25146 (+13:15:05.2) +/- 1.1" mag=17.00+/-0.35 dist=6.2 REFID=29
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 < 13.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
Region file: /Home/eud/uvot_tdrss/swift/uvot_gcn/src_924641_XRT.reg
# Region file format: DS9 version 3.0
# find_uvot_ag.pl vrs. 2017-02-17 fem XRT
global font="helvetica 12 bold" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source=1
fk5;circle(272.0331,+13.2514,5.5") # color=red dash=0
point(272.03152,13.25129) # point=diamond 10 color=red width=2
srclist paragraph message for exposure 1 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 150.000 seconds with the White
filter starting 105 seconds after the BAT trigger. There is a candidate
afterglow in the list of sources generated on-board at
RA(J2000) = 18:08:07.52 = 272.03134
DEC(J2000) = +13:15:05.3 = 13.25146
with a 90%-confidence error radius of about 1.10 arc sec. This position is 6.2
arc sec. from the center of the XRT error circle. The estimated magnitude is
17.00. 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 190910d07h08m35s714096usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=924641
-expid=589791877 -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 589791877.97756 or about 2019:253:07:04:32 UT
Found 1449 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 17 srclist
source(s) without IDs. There are 1 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 19.22 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?
589791877 104 WHITE 272.03134 13.25146 17.00/19.2 6.2 srclist Yes
589791877 104 ? image data are not available.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 13.25146
GRB_ERROR: 1.10
GRB_RA: 272.03134
IMAGE_START_TIME: 07:04:32
MAGNITUDE: 17.00
MAG_ERROR: 0.4
MESSAGE_TYPE: ACK
SOURCE: XRT