srclist overlap message for exposure 1 of trigger 1015615
uvot_overlap.pl vrs. 2010-12-20b fem started at 210102d01h47m36s684267usUT
The observation of trigger 1015615 started 2021-01-02T01:23:18.5
Examining file 1015615_g3965_uvot_sky_srclist.fits
The exposure ID is 631243398
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (234.7519,-84.1858) with a roll angle of 50.1
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 (234.7030,-84.1890) with a radius of 3.000 arc min
This is 0.353 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 1015615
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210102d01h47m38s104644usUT
Observation start time is 2021-01-02T01:23:18.5
Examining file 1015615_g3965_uvot_catalog_srclist.fits
The exposure ID is 631243398
The exposure is 149.870 sec.
The bin size is 2 pixels
The filter is WHITE
There are 73 detected source(s) for 1015615_g3965
Aspect correction adds 0.00399 degrees (0.958 sec of time = 1.45 arc sec) to RA
Aspect correction adds -0.00043 degrees (-1.56 arcsec) to Dec
Total aspect correction is 2.13 arcsec
Star catalogs centered at 234.7595 , -84.1881 with radius 6.23 arc min.
n_usno: 733 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.4459
RA DEC Mag Color
bright star 0: 235.44074 (15:41:45.78) -84.22035 (-84:13:13.3) 11.45 USNO-V
Mean distance difference (CAT_DELTA) for 64 matched entries is 0.673" for 1015615_g3965
Mean and std. dev of mag. difference (MAG_DELTA) are 1.380 and 0.430 for 1015615_g3965
Found 10 entries without IDs and 7 entries that are acceptable afterglow candidates for 1015615_g3965.
Acceptable entries have no ID, XRT distances < 10", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
2 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=234.7030 (15:38:48.72) DEC=-84.1890 (-84:11:20.4)
XRT distances are as reported in catalog file.
-----------------
Entry 6 in the list of sources is a candidate afterglow for 1015615_g3965 with 3x3 stamp
ra=234.63403 (15:38:32.17) dec=-84.23862 (-84:14:19.0) +/- 1.1" mag=18.37+/-0.35
dist=598.8 REFID=34
*** The position of this source is inconsistent with the XRT position.
The position is 180.4 arc sec from the BAT position.
src: 6 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
234.6275 -84.2341 16.5 -1 USNO-B1 99.99 19.30 99.99
234.6059 -84.2347 17.4 -1 USNO-B1 12.64 12.04 12.30 *
234.6863 -84.2379 19.1 -1 USNO-B1 18.46 16.98 17.64
234.5963 -84.2372 14.5 -1 USNO-B1 99.99 18.68 99.99
234.6373 -84.2392 2.3 -1 USNO-B1 17.20 16.00 16.54 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 23 in the list of sources is a candidate afterglow for 1015615_g3965 with 3x3 stamp
ra=235.09068 (15:40:21.76) dec=-84.19235 (-84:11:32.5) +/- 1.1" mag=18.97+/-0.35
dist=751.9 REFID=70
*** The position of this source is inconsistent with the XRT position.
The position is 141.8 arc sec from the BAT position.
src: 23 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
235.0604 -84.1951 14.9 -1 USNO-B1 21.21 19.84 20.45
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 29 in the list of sources is a candidate afterglow for 1015615_g3965 with 3x3 stamp
ra=234.38508 (15:37:32.42) dec=-84.19364 (-84:11:37.1) +/- 1.1" mag=19.15+/-0.35
dist=778.0 REFID=71
*** The position of this source is inconsistent with the XRT position.
The position is 117.0 arc sec from the BAT position.
src: 29 distr. of nearby unmatched sources: 0 0 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
234.3730 -84.1947 5.8 -1 USNO-B1 21.99 19.59 20.66
234.3600 -84.1917 11.5 -1 USNO-B1 20.32 19.80 20.03
234.3573 -84.1919 11.9 -1 USNO-B1 99.99 19.66 99.99
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 31 in the list of sources is a candidate afterglow for 1015615_g3965 with 3x3 stamp
ra=234.28133 (15:37:07.52) dec=-84.19585 (-84:11:45.1) +/- 1.1" mag=19.22+/-0.35
dist=781.7 REFID=72
*** The position of this source is inconsistent with the XRT position.
The position is 155.6 arc sec from the BAT position.
src: 31 distr. of nearby unmatched sources: 0 0 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
234.3117 -84.1925 16.4 -1 USNO-B1 99.99 20.63 99.99
234.2575 -84.1947 9.5 -1 USNO-B1 17.68 16.60 17.08
234.2586 -84.2004 18.5 -1 USNO-B1 21.23 19.52 20.28
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 47 in the list of sources is a candidate afterglow for 1015615_g3965 with 3x3 stamp
ra=235.00912 (15:40:02.19) dec=-84.14929 (-84:08:57.4) +/- 1.1" mag=19.27+/-0.35
dist=906.2 REFID=73
*** The position of this source is inconsistent with the XRT position.
The position is 181.6 arc sec from the BAT position.
src: 47 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
235.0369 -84.1511 12.1 -1 USNO-B1 20.83 19.79 20.25
235.0302 -84.1467 12.0 -1 USNO-B1 19.68 18.69 19.13
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 52 in the list of sources is a candidate afterglow for 1015615_g3965 with 5x5 stamp
ra=234.78197 (15:39:07.67) dec=-84.14019 (-84:08:24.7) +/- 1.1" mag=13.86+/-0.35
dist=942.1 REFID=3
*** The position of this source is inconsistent with the XRT position.
The position is 178.1 arc sec from the BAT position.
src: 52 distr. of nearby unmatched sources: 0 0 0 0 1
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
234.7432 -84.1410 14.6 -1 USNO-B1 21.72 20.71 21.16
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 54 in the list of sources is a candidate afterglow for 1015615_g3965 with 3x3 stamp
ra=234.81532 (15:39:15.68) dec=-84.13505 (-84:08:06.2) +/- 1.1" mag=18.31+/-0.35
dist=959.7 REFID=47
*** The position of this source is inconsistent with the XRT position.
The position is 198.5 arc sec from the BAT position.
src: 54 distr. of nearby unmatched sources: 0 0 0 0 1
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
234.8443 -84.1381 15.3 -1 USNO-B1 21.03 19.36 20.10
*** If XRT position is correct, then this is NOT the afterglow
List UVOT sources within 10" of the XRT position:
There are 2 candidate(s) outside XRT error circle with mag < 18.66
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.22, XRT distances < 10",
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 1015615
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no image afterglow info
SRCLIST PROBLEM: overlap is unknown
See notes for more details.
------ Start for Possible Stand-alone Circular ----
In response to GRB210102 (Swift/BAT trigger 1015615) at 00:17:12 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 3939 seconds after the BAT trigger. No credible afterglow candidate
has been found in the initial data products. Results from the 2.7'x2.7'
sub-image are not available at this time. The overlap of the 8'x8' region for
the list of sources generated on-board and the XRT error circle is uncertain.
No correction has been made for the expected extinction corresponding to E(B-V)
of 0.12.
------- notes for trigger 1015615 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210102d01h47m39s973957usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1015615
-expid=631243398 -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/1015615/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
XRT position found for srclist. BAT position found.
UVOT exposure began at MET 631243398.51992 or about 2021:002:01:23:13 UT
Found 729 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 13% of the srclist region. Found 73 sources in
srclist catalog. Found 10 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
The closest srclist source has ra= 234.4957 dec= -84.2572 mag=18.92
sep=547.49".
This paragraph is only useful if the XRT position is grossly wrong. There are 2
candidate(s) in the srclist data with mag < 18.66 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=234.78197
(15:39:07.67), DEC=-84.14019 (-84:08:24.7) (J2000). It has a mag of 13.86. It
is 178.1" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 3939 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 15:39:07.67 = 234.78197
DEC(J2000) = -84:08:24.7 = -84.14019
with a 90%-confidence error radius of about 1.10 arc sec. The estimated
magnitude is 13.86 with a 1-sigma error of about 0.35. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.12.
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?
631243398 3939 WHITE srclist found no candidates.
631243398 3939 WHITE image data are not available.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------