srclist overlap message for exposure 2 of trigger 1031728
uvot_overlap.pl vrs. 2010-12-20b fem started at 210210d08h00m56s450916usUT
The observation of trigger 1031728 started 2021-02-10T02:05:52.0
Examining file ./1031728_g324_uvot_sky_srclist.fits
The exposure ID is 634615552
The exposure time is undefined.
The filter is U.
The uvot region is centered at (262.8155,14.6460) with a roll angle of 112.9
It is square with sides of 12.05 arc min. for an area of 145.15 sq arc min
The BAT error circle is centered at (262.8110,14.6480) with a radius of 3.000 arc min
This is 0.288 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
The XRT error circle is centered at (262.7704,14.6626) with a radius of 0.028 arc min
This is 2.800 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 1031728
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210210d08h01m10s626234usUT
Observation start time is 2021-02-10T02:05:52.0
Examining file ./1031728_g324_uvot_catalog_srclist.fits
The exposure ID is 634615552
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 165 detected source(s) for 1031728_g324
Aspect correction adds -0.00059 degrees (-0.142 sec of time = -2.06 arc sec) to RA
Aspect correction adds -0.00092 degrees (-3.30 arcsec) to Dec
Total aspect correction is 3.89 arcsec
Star catalogs centered at 262.8122 , 14.6489 with radius 8.80 arc min.
n_usno: 1954 n_gsc: 0
*** WARNING -- bright star catalog has 4 entries brighter than 12 mag
The brightest has mag 9.84
RA DEC Mag Color
bright star 0: 262.80149 (17:31:12.36) 14.74999 (+14:44:60.0) 11.53 USNO-V
bright star 1: 262.74914 (17:30:59.79) 14.76231 (+14:45:44.3) 9.84 USNO-R
bright star 2: 262.70403 (17:30:48.97) 14.72652 (+14:43:35.5) 10.71 USNO-V
bright star 3: 262.67492 (17:30:41.98) 14.61800 (+14:37:04.8) 11.46 USNO-V
Mean distance difference (CAT_DELTA) for 136 matched entries is 0.794" for 1031728_g324
Mean and std. dev of mag. difference (MAG_DELTA) are 1.314 and 0.813 for 1031728_g324
Found 31 entries without IDs and 1 entries that are acceptable afterglow candidates for 1031728_g324.
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.
12 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=262.8110 (17:31:14.64) DEC=14.6480 (+14:38:52.8)
XRT distances are from RA=262.7704 (17:31:04.90) DEC=14.6626 (+14:39:45.2)
-----------------
Entry 21 in the list of sources is a candidate afterglow for 1031728_g324 with 3x3 stamp
ra=262.77112 (17:31:05.07) dec=14.66281 (+14:39:46.1) +/- 1.1" mag=16.69+/-0.35
dist=2.6 REFID=21
src: 21 distr. of nearby unmatched sources: 0 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
262.7736 14.6609 11.1 -1 USNO-B1 20.19 19.20 19.64
262.7733 14.6629 7.6 -1 USNO-B1 18.26 16.53 17.30
##### This source remains a candidate #####
It has no entries within 4" or brighter than 13 mag
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=262.77112 (17:31:05.07) dec=14.66281 (+14:39:46.1) +/- 1.1" mag=16.69+/-0.35 dist=2.6 REFID=21
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 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 1031728
------ Start for Possible Stand-alone Circular ----
In response to GRB210210 (Swift/BAT trigger 1031728) at 02:00:27 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
297 seconds after the BAT trigger. There is a candidate afterglow in the list
of sources generated on-board at
RA(J2000) = 17:31:05.07 = 262.77112
DEC(J2000) = +14:39:46.1 = 14.66281
with a 90%-confidence error radius of about 1.10 arc sec. This position is 2.6
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.69. No correction has been made for the expected extinction corresponding to
E(B-V) of 0.097.
------- notes for trigger 1031728 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210210d08h01m15s032372usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1031728
-expid=634615552 -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/1031728/
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 634615552.0442 or about 2021:041:02:05:47 UT
Found 1950 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 17% of the srclist region. Found 165 sources in
srclist catalog. Found 31 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 13 source(s) in Genie image catalog. Found 1 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.38 mag. Found 136 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
15% of the Genie image region. The XRT position was OUTSIDE the star catalog
search region. The closest Genie source has ra= 262.7959 dec= 14.6592
mag=16.47 sep=89.67".
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?
634615552 297 U 262.77112 14.66281 16.69/18.1 2.6 srclist Yes
634615552 297 U image found no candidates.
List afterglow candidates for other finding charts.
634615339 84 WHITE 262.77085 14.66272 17.06/19.2 1.6 srclist Yes
634615339 84 WHITE image found no candidates.
634616132 877 WHITE 262.77086 14.66293 16.97/19.2 3.9 srclist Yes
634616132 877 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: 14.66281
GRB_ERROR: 1.10
GRB_RA: 262.77112
IMAGE_START_TIME: 02:05:47
MAGNITUDE: 16.69
MAG_ERROR: 0.4
MESSAGE_TYPE: ACK
SOURCE: XRT