srclist overlap message for exposure 1 of trigger 927839
uvot_overlap.pl vrs. 2010-12-20b fem started at 191005d01h37m50s081529usUT
The observation of trigger 927839 started 2019-10-04T21:35:14.3
Examining file ./927839_g92_uvot_sky_srclist.fits
The exposure ID is 591917714
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (49.2124,-39.6375) with a roll angle of 131.7
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 (49.1770,-39.6130) with a radius of 3.000 arc min
This is 2.198 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 25.61 sq. arc min or 0.91 of the BAT error circle
The XRT error circle is centered at (49.2040,-39.6350) with a radius of 0.033 arc min
This is 0.414 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 1 of trigger 927839
find_uvot_ag.pl vrs. 2017-02-17 fem started at 191005d01h37m52s518728usUT
Observation start time is 2019-10-04T21:35:14.3
Examining file ./927839_g92_uvot_catalog_srclist.fits
The exposure ID is 591917714
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 22 detected source(s) for 927839_g92
Aspect correction adds 0.00079 degrees (0.189 sec of time = 2.18 arc sec) to RA
Aspect correction adds -0.00071 degrees (-2.56 arcsec) to Dec
Total aspect correction is 3.36 arcsec
Star catalogs centered at 49.2002 , -39.6334 with radius 5.65 arc min.
n_usno: 382 n_gsc: 0
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 9.99494
RA DEC Mag Color
bright star 0: 49.17014 (03:16:40.83) -39.57413 (-39:34:26.9) 10.91 USNO-V
bright star 1: 49.11448 (03:16:27.48) -39.65113 (-39:39:04.1) 9.99 USNO-V
Mean distance difference (CAT_DELTA) for 19 matched entries is 0.716" for 927839_g92
Mean and std. dev of mag. difference (MAG_DELTA) are 1.479 and 1.588 for 927839_g92
Found 4 entries without IDs and 4 entries that are acceptable afterglow candidates for 927839_g92.
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=49.1770 (03:16:42.48) DEC=-39.6130 (-39:36:46.8)
XRT distances are from RA=49.2040 (03:16:48.96) DEC=-39.6350 (-39:38:06.1)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 927839_g92 with 5x5 stamp
ra=49.20484 (03:16:49.16) dec=-39.63450 (-39:38:04.2) +/- 1.1" mag=18.95+/-0.35
dist=3.0 REFID=9
src: 0 distr. of nearby unmatched sources: 1 0 0 0 0
Found 2 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
49.1979 -39.6357 19.7 -1 USNO-B1 99.99 20.36 99.99
49.2030 -39.6298 17.8 -1 USNO-B1 21.16 20.20 20.63
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
-----------------
Entry 1 in the list of sources is a candidate afterglow for 927839_g92 with 5x5 stamp
ra=49.20495 (03:16:49.19) dec=-39.63435 (-39:38:03.6) +/- 1.1" mag=18.80+/-0.35
dist=3.6 REFID=17
src: 1 distr. of nearby unmatched sources: 1 0 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
49.2030 -39.6298 17.4 -1 USNO-B1 21.16 20.20 20.63
49.2031 -39.6291 19.7 -1 USNO-B1 20.46 20.61 20.54
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
-----------------
Entry 5 in the list of sources is a candidate afterglow for 927839_g92 with 5x5 stamp
ra=49.22660 (03:16:54.38) dec=-39.63046 (-39:37:49.7) +/- 1.1" mag=20.88+/-0.35
dist=64.8 REFID=22
*** The position of this source is inconsistent with the XRT position.
The position is 151.2 arc sec from the BAT position.
src: 5 distr. of nearby unmatched sources: 0 0 0 0 0
Found 1 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
49.2267 -39.6282 8.0 -1 USNO-B1 17.84 16.77 17.25
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 7 in the list of sources is a candidate afterglow for 927839_g92 with 5x5 stamp
ra=49.17296 (03:16:41.51) dec=-39.64011 (-39:38:24.4) +/- 1.1" mag=20.96+/-0.35
dist=88.0 REFID=21
*** The position of this source is inconsistent with the XRT position.
The position is 98.2 arc sec from the BAT position.
src: 7 distr. of nearby unmatched sources: 0 0 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
49.1733 -39.6363 13.6 -1 USNO-B1 21.40 20.85 21.09
49.1703 -39.6414 8.5 -1 USNO-B1 21.30 19.61 20.36
*** If XRT position is correct, then this is NOT the afterglow
separation of 0 and 1 is 0.6 arc sec
Eliminate candidate 0 -- it is only 0.6 arc sec from candidate 1 and dimmer
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=49.20484 (03:16:49.16) dec=-39.63450 (-39:38:04.2) +/- 1.1" mag=18.95+/-0.35 dist=3.0 REFID=9
Unmatched source ra=49.20495 (03:16:49.19) dec=-39.63435 (-39:38:03.6) +/- 1.1" mag=18.80+/-0.35 dist=3.6 REFID=17
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 927839
------ Start for Possible Stand-alone Circular ----
In response to GRB191004 (Swift/BAT trigger 927839) at 21:33:41 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 68 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 03:16:49.10 = 49.20458
DEC(J2000) = -39:38:03.3 = -39.63425
with a 90%-confidence error radius of about 0.62 arc sec. This position is 3.2
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.00 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.02.
------- notes for trigger 927839 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 191005d01h38m00s494443usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=927839
-expid=591917714 -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/927839/
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 591917714.25214 or about 2019:277:21:35:09 UT
Found 378 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 8% of the srclist region. Found 22 sources in
srclist catalog. Found 4 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 9 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 3 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.87 mag. Found 75 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 9% 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?
591917714 68 WHITE 49.20495 -39.63435 18.80/19.2 3.6 srclist Yes
591917714 68 WHITE 49.20458 -39.63425 18.00/20.9 3.2 image Yes
List afterglow candidates for other finding charts.
591917926 280 ? srclist data are not available.
591917926 280 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -39.63425
GRB_ERROR: 0.62
GRB_RA: 49.20458
IMAGE_START_TIME: 21:35:09
MAGNITUDE: 18.00
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT