srclist overlap message for exposure 2 of trigger 945521
uvot_overlap.pl vrs. 2010-12-20b fem started at 191222d03h16m03s621408usUT
The observation of trigger 945521 started 2019-12-21T20:44:41.3
Examining file ./945521_g327_uvot_sky_srclist.fits
The exposure ID is 598653881
The exposure time is undefined.
The filter is U.
The uvot region is centered at (154.8344,-38.1594) with a roll angle of 123.5
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 (154.8320,-38.1410) with a radius of 3.000 arc min
This is 1.110 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 28.43 sq. arc min or 1.01 of the BAT error circle
The XRT error circle is centered at (154.8299,-38.1576) with a radius of 0.028 arc min
This is 0.237 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 2 of trigger 945521
find_uvot_ag.pl vrs. 2017-02-17 fem started at 191222d03h16m18s188586usUT
Observation start time is 2019-12-21T20:44:41.3
Examining file ./945521_g327_uvot_catalog_srclist.fits
The exposure ID is 598653881
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 105 detected source(s) for 945521_g327
Aspect correction adds 0.00122 degrees (0.293 sec of time = 3.46 arc sec) to RA
Aspect correction adds -0.00073 degrees (-2.64 arcsec) to Dec
Total aspect correction is 4.35 arcsec
Star catalogs centered at 154.8296 , -38.1607 with radius 6.42 arc min.
n_usno: 963 n_gsc: 0
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 11.74034
RA DEC Mag Color
bright star 0: 154.84424 (10:19:22.62) -38.24657 (-38:14:47.6) 11.93 USNO-V
bright star 1: 154.70379 (10:18:48.91) -38.19244 (-38:11:32.8) 11.74 USNO-V
Mean distance difference (CAT_DELTA) for 94 matched entries is 0.809" for 945521_g327
Mean and std. dev of mag. difference (MAG_DELTA) are 1.361 and 0.668 for 945521_g327
Found 12 entries without IDs and 10 entries that are acceptable afterglow candidates for 945521_g327.
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=154.8320 (10:19:19.68) DEC=-38.1410 (-38:08:27.6)
XRT distances are from RA=154.8299 (10:19:19.18) DEC=-38.1576 (-38:09:27.3)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 945521_g327 with 5x5 stamp
ra=154.82976 (10:19:19.14) dec=-38.15802 (-38:09:28.9) +/- 1.1" mag=14.87+/-0.35
dist=1.6 REFID=12
src: 0 distr. of nearby unmatched sources: 4 1 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
154.8308 -38.1598 7.1 -1 USNO-B1 16.83 16.12 16.43
154.8313 -38.1604 9.6 -1 USNO-B1 16.93 16.49 16.69
##### 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 945521_g327 with 3x3 stamp
ra=154.82957 (10:19:19.10) dec=-38.15746 (-38:09:26.8) +/- 1.1" mag=16.16+/-0.35
dist=1.1 REFID=36
src: 1 distr. of nearby unmatched sources: 2 3 0 0 0
Found 3 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
154.8308 -38.1598 9.2 -1 USNO-B1 16.83 16.12 16.43
154.8313 -38.1604 11.7 -1 USNO-B1 16.93 16.49 16.69
154.8275 -38.1525 18.8 -1 USNO-B1 19.40 17.63 18.42
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
-----------------
Entry 2 in the list of sources is a candidate afterglow for 945521_g327 with 3x3 stamp
ra=154.82793 (10:19:18.70) dec=-38.15803 (-38:09:28.9) +/- 1.1" mag=18.57+/-0.35
dist=5.9 REFID=84
*** The position of this source is inconsistent with the XRT position.
The position is 62.4 arc sec from the BAT position.
src: 2 distr. of nearby unmatched sources: 1 4 0 0 0
Found 3 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
154.8308 -38.1598 10.4 -1 USNO-B1 16.83 16.12 16.43
154.8313 -38.1604 12.8 -1 USNO-B1 16.93 16.49 16.69
154.8275 -38.1525 19.9 -1 USNO-B1 19.40 17.63 18.42
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 3 in the list of sources is a candidate afterglow for 945521_g327 with 5x5 stamp
ra=154.83010 (10:19:19.22) dec=-38.15783 (-38:09:28.2) +/- 1.1" mag=13.06+/-0.35
dist=1.0 REFID=2
src: 3 distr. of nearby unmatched sources: 3 2 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
154.8308 -38.1598 7.4 -1 USNO-B1 16.83 16.12 16.43
154.8313 -38.1604 9.9 -1 USNO-B1 16.93 16.49 16.69
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
-----------------
Entry 4 in the list of sources is a candidate afterglow for 945521_g327 with 3x3 stamp
ra=154.82865 (10:19:18.88) dec=-38.15906 (-38:09:32.6) +/- 1.1" mag=19.06+/-0.35
dist=6.4 REFID=75
*** The position of this source is inconsistent with the XRT position.
The position is 65.7 arc sec from the BAT position.
src: 4 distr. of nearby unmatched sources: 2 3 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
154.8308 -38.1598 6.7 -1 USNO-B1 16.83 16.12 16.43
154.8313 -38.1604 8.9 -1 USNO-B1 16.93 16.49 16.69
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 5 in the list of sources is a candidate afterglow for 945521_g327 with 3x3 stamp
ra=154.83094 (10:19:19.43) dec=-38.15877 (-38:09:31.6) +/- 1.1" mag=18.51+/-0.35
dist=5.2 REFID=71
*** The position of this source is inconsistent with the XRT position.
The position is 64.1 arc sec from the BAT position.
src: 5 distr. of nearby unmatched sources: 2 3 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
154.8308 -38.1598 3.8 -1 USNO-B1 16.83 16.12 16.43 *
154.8313 -38.1604 6.0 -1 USNO-B1 16.93 16.49 16.69
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 19 in the list of sources is a candidate afterglow for 945521_g327 with 3x3 stamp
ra=154.84390 (10:19:22.54) dec=-38.13348 (-38:08:00.5) +/- 1.1" mag=18.26+/-0.35
dist=95.4 REFID=56
*** The position of this source is inconsistent with the XRT position.
The position is 43.2 arc sec from the BAT position.
src: 19 srclist_match has ID
src: 19 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
154.8434 -38.1334 1.4 -1 USNO-B1 17.79 16.07 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
-----------------
Entry 35 in the list of sources is a candidate afterglow for 945521_g327 with 3x3 stamp
ra=154.87479 (10:19:29.95) dec=-38.13887 (-38:08:19.9) +/- 1.1" mag=17.26+/-0.35
dist=143.8 REFID=46
*** The position of this source is inconsistent with the XRT position.
The position is 121.4 arc sec from the BAT position.
src: 35 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
154.8748 -38.1409 7.1 -1 USNO-B1 99.99 18.59 99.99
154.8731 -38.1386 5.0 -1 USNO-B1 18.05 19.88 19.07
154.8751 -38.1396 2.9 -1 USNO-B1 13.67 12.83 13.20 *
154.8754 -38.1370 7.1 -1 USNO-B1 18.65 20.13 19.47
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 37 in the list of sources is a candidate afterglow for 945521_g327 with 3x3 stamp
ra=154.78333 (10:19:08.00) dec=-38.13752 (-38:08:15.1) +/- 1.1" mag=19.43+/-0.35
dist=150.4 REFID=104
*** The position of this source is inconsistent with the XRT position.
The position is 138.4 arc sec from the BAT position.
src: 37 distr. of nearby unmatched sources: 0 0 1 0 0
Found 10 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
154.7898 -38.1361 19.0 -1 USNO-B1 21.83 99.99 99.99
154.7895 -38.1362 18.1 -1 USNO-B1 19.40 18.60 18.96
154.7842 -38.1384 4.0 -1 USNO-B1 21.80 17.97 19.67
154.7841 -38.1356 7.4 -1 USNO-B1 13.34 12.38 12.80 *
154.7799 -38.1388 10.9 -1 USNO-B1 17.48 18.73 18.18
154.7842 -38.1329 16.8 -1 USNO-B1 99.99 19.61 99.99
154.7806 -38.1354 10.8 -1 USNO-B1 99.99 18.17 99.99
154.7803 -38.1349 12.8 -1 USNO-B1 99.99 19.90 99.99
154.7798 -38.1353 12.8 -1 USNO-B1 21.00 19.15 19.97
154.7764 -38.1380 19.8 -1 USNO-B1 18.71 17.77 18.19
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 41 in the list of sources is a candidate afterglow for 945521_g327 with 3x3 stamp
ra=154.78221 (10:19:07.73) dec=-38.13411 (-38:08:02.8) +/- 1.1" mag=19.29+/-0.35
dist=159.3 REFID=103
*** The position of this source is inconsistent with the XRT position.
The position is 143.1 arc sec from the BAT position.
src: 41 distr. of nearby unmatched sources: 0 0 1 0 0
Found 7 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
154.7842 -38.1384 16.4 -1 USNO-B1 21.80 17.97 19.67
154.7841 -38.1356 7.5 -1 USNO-B1 13.34 12.38 12.80 *
154.7799 -38.1388 18.2 -1 USNO-B1 17.48 18.73 18.18
154.7842 -38.1329 7.2 -1 USNO-B1 99.99 19.61 99.99
154.7806 -38.1354 6.4 -1 USNO-B1 99.99 18.17 99.99
154.7803 -38.1349 6.2 -1 USNO-B1 99.99 19.90 99.99
154.7798 -38.1353 8.1 -1 USNO-B1 21.00 19.15 19.97
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
separation of 0 and 1 is 2.1 arc sec
Eliminate candidate 1 -- it is only 2.1 arc sec from candidate 0 and dimmer
separation of 0 and 3 is 1.2 arc sec
Eliminate candidate 0 -- it is only 1.2 arc sec from candidate 3 and dimmer
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
154.8308 -38.1598 8.5 -1 USNO-B1 16.83 16.12 16.43
The closest star is 8.46" away.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=154.82976 (10:19:19.14) dec=-38.15802 (-38:09:28.9) +/- 1.1" mag=14.87+/-0.35 dist=1.6 REFID=12
Unmatched source ra=154.82957 (10:19:19.10) dec=-38.15746 (-38:09:26.8) +/- 1.1" mag=16.16+/-0.35 dist=1.1 REFID=36
Unmatched source ra=154.82793 (10:19:18.70) dec=-38.15803 (-38:09:28.9) +/- 1.1" mag=18.57+/-0.35 dist=5.9 REFID=84
Unmatched source ra=154.83010 (10:19:19.22) dec=-38.15783 (-38:09:28.2) +/- 1.1" mag=13.06+/-0.35 dist=1.0 REFID=2
Unmatched source ra=154.82865 (10:19:18.88) dec=-38.15906 (-38:09:32.6) +/- 1.1" mag=19.06+/-0.35 dist=6.4 REFID=75
Unmatched source ra=154.83094 (10:19:19.43) dec=-38.15877 (-38:09:31.6) +/- 1.1" mag=18.51+/-0.35 dist=5.2 REFID=71
Matched source ra=154.83108 (10:19:19.46) dec=-38.15992 (-38:09:35.7) +/- 1.1" mag=19.01+/-0.35 dist=9.0 REFID=94
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.12, 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 2 of trigger 945521
------ Start for Possible Stand-alone Circular ----
In response to GRB191221 (Swift/BAT trigger 945521) at 20:39:13 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
303 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 10:19:19.25 = 154.83020
DEC(J2000) = -38:09:27.5 = -38.15765
with a 90%-confidence error radius of about 0.61 arc sec. This position is 0.8
arc sec. from the center of the XRT error circle. The estimated magnitude is
11.74 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.08.
------- notes for trigger 945521 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 191222d03h16m21s479527usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=945521
-expid=598653881 -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/945521/
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 598653881.26466 or about 2019:355:20:44:36 UT
Found 959 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 16% of the srclist region. Found 105 sources in
srclist catalog. Found 12 srclist source(s) without IDs. There are 1 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.12 mag.
Found 16 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
20.34 mag. Found 171 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 15% 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?
598653881 303 U 154.83010 -38.15783 13.06/18.1 1.0 srclist Yes
598653881 303 U 154.83020 -38.15765 11.74/20.3 0.8 image Yes
List afterglow candidates for other finding charts.
598653668 90 WHITE 154.82986 -38.15849 15.43/19.2 3.3 srclist Yes
598653668 90 WHITE 154.82987 -38.15813 14.93/20.6 2.0 image Yes
598653668 90 WHITE 154.83092 -38.15736 15.72/20.6 2.9 image Yes
598654436 858 WHITE 154.82995 -38.15769 13.89/19.2 3.9 srclist Yes
598654436 858 WHITE 154.83018 -38.15763 13.74/20.4 4.6 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -38.15765
GRB_ERROR: 0.61
GRB_RA: 154.83020
IMAGE_START_TIME: 20:44:36
MAGNITUDE: 11.74
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT