srclist overlap message for exposure 2 of trigger 1057131
uvot_overlap.pl vrs. 2010-12-20b fem started at 210621d17h27m14s002628usUT
The observation of trigger 1057131 started 2021-06-21T17:09:21.7
Examining file ./1057131_g284_uvot_sky_srclist.fits
The exposure ID is 645988161
The exposure time is undefined.
The filter is U.
The uvot region is centered at (238.8062,-54.0673) with a roll angle of 230.5
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 (238.8120,-54.0630) with a radius of 3.000 arc min
This is 0.329 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 (238.7865,-54.0614) with a radius of 0.032 arc min
This is 0.783 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 1057131
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210621d17h27m41s516053usUT
Observation start time is 2021-06-21T17:09:21.7
Examining file ./1057131_g284_uvot_catalog_srclist.fits
The exposure ID is 645988161
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 190 detected source(s) for 1057131_g284
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 1.000
srclist_overlap returned: xrt_overlap 1.000
Dimmest detected source in 1057131_g284 has mag 18.21
Aspect correction adds -0.00037 degrees (-0.089 sec of time = -0.78 arc sec) to RA
Aspect correction adds -0.00021 degrees (-0.76 arcsec) to Dec
Total aspect correction is 1.09 arcsec
Star catalogs centered at 238.8122 , -54.0646 with radius 8.59 arc min.
n_usno: 3736 n_gsc: 0
*** WARNING -- bright star catalog has 13 entries brighter than 12 mag
The brightest has mag 9.25418
RA DEC Mag Color
bright star 0: 238.80655 (15:55:13.57) -54.06409 (-54:03:50.7) 11.70 USNO-R
bright star 1: 238.79818 (15:55:11.56) -54.07666 (-54:04:36.0) 10.71 USNO-V
bright star 2: 238.85814 (15:55:25.95) -54.07434 (-54:04:27.6) 11.40 USNO-V
bright star 3: 238.76109 (15:55:02.66) -54.00243 (-54:00:08.7) 9.25 USNO-V
bright star 4: 238.89704 (15:55:35.29) -54.12468 (-54:07:28.9) 10.56 USNO-V
bright star 5: 238.95935 (15:55:50.24) -54.05451 (-54:03:16.2) 11.43 USNO-V
bright star 6: 238.65697 (15:54:37.67) -54.02573 (-54:01:32.6) 9.59 USNO-V
bright star 7: 238.89021 (15:55:33.65) -53.96363 (-53:57:49.1) 10.44 USNO-V
bright star 8: 238.71014 (15:54:50.43) -53.96361 (-53:57:49.0) 10.29 USNO-V
bright star 9: 238.67187 (15:54:41.25) -53.97750 (-53:58:39.0) 11.80 USNO-V
bright star 10: 239.01626 (15:56:03.90) -54.08814 (-54:05:17.3) 11.49 USNO-V
bright star 11: 238.77552 (15:55:06.13) -53.92856 (-53:55:42.8) 11.01 USNO-V
bright star 12: 239.03749 (15:56:09.00) -54.02342 (-54:01:24.3) 11.02 USNO-V
Mean distance difference (CAT_DELTA) for 127 matched entries is 0.854" for 1057131_g284
Mean and std. dev of mag. difference (MAG_DELTA) are 2.198 and 0.802 for 1057131_g284
Found 65 entries without IDs and 7 entries that are acceptable afterglow candidates for 1057131_g284.
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.
42 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=238.8120 (15:55:14.88) DEC=-54.0630 (-54:03:46.8)
XRT distances are from RA=238.7865 (15:55:08.75) DEC=-54.0614 (-54:03:40.9)
*** WARNING 34 per cent of entries have no IDs.
-----------------
Entry 22 in the list of sources is a candidate afterglow for 1057131_g284 with 1x1 stamp
ra=238.75107 (15:55:00.26) dec=-54.07760 (-54:04:39.4) +/- 1.1" mag=18.12+/-0.35
dist=94.9 REFID=184
*** The position of this source is inconsistent with the XRT position.
The position is 139.0 arc sec from the BAT position.
src: 22 distr. of nearby unmatched sources: 0 0 0 0 0
Found 9 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
238.7554 -54.0739 16.3 -1 USNO-B1 17.09 14.26 15.51
238.7580 -54.0782 14.8 -1 USNO-B1 14.63 13.89 14.22
238.7491 -54.0722 19.9 -1 USNO-B1 19.85 18.23 18.95
238.7542 -54.0816 16.0 -1 USNO-B1 99.99 18.17 99.99
238.7518 -54.0791 5.5 -1 USNO-B1 17.15 16.04 16.53
238.7510 -54.0785 3.1 -1 USNO-B1 15.45 14.17 14.74 *
238.7510 -54.0797 7.6 -1 USNO-B1 15.11 14.11 14.55
238.7458 -54.0772 11.3 -1 USNO-B1 19.65 18.16 18.82
238.7440 -54.0771 15.0 -1 USNO-B1 16.91 15.64 16.20
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 1057131_g284 with 3x3 stamp
ra=238.88383 (15:55:32.12) dec=-54.05660 (-54:03:23.8) +/- 1.1" mag=17.10+/-0.35
dist=206.5 REFID=65
*** The position of this source is inconsistent with the XRT position.
The position is 153.5 arc sec from the BAT position.
src: 23 srclist_match has ID
src: 23 distr. of nearby unmatched sources: 1 0 0 0 0
Found 9 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
238.8757 -54.0581 17.9 -1 USNO-B1 20.34 19.09 19.64
238.8775 -54.0535 17.5 -1 USNO-B1 19.60 18.33 18.89
238.8784 -54.0552 12.5 -1 USNO-B1 99.99 18.24 99.99
238.8827 -54.0592 9.6 -1 USNO-B1 19.13 17.17 18.04
238.8836 -54.0555 3.8 -1 USNO-B1 18.90 11.28 14.66 *
238.8841 -54.0562 1.4 -1 USNO-B1 13.62 11.14 12.24 *
238.8847 -54.0529 13.3 -1 USNO-B1 99.99 18.77 99.99
238.8872 -54.0549 9.4 -1 USNO-B1 99.99 18.80 99.99
238.8917 -54.0566 16.6 -1 USNO-B1 18.95 17.82 18.32
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 25 in the list of sources is a candidate afterglow for 1057131_g284 with 3x3 stamp
ra=238.75045 (15:55:00.11) dec=-54.03598 (-54:02:09.5) +/- 1.1" mag=16.91+/-0.35
dist=118.9 REFID=54
*** The position of this source is inconsistent with the XRT position.
The position is 162.4 arc sec from the BAT position.
src: 25 distr. of nearby unmatched sources: 0 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
238.7567 -54.0364 13.3 -1 USNO-B1 19.02 17.33 18.08
238.7498 -54.0365 2.4 -1 USNO-B1 14.74 13.79 14.21 *
238.7448 -54.0401 19.0 -1 USNO-B1 18.43 17.56 17.95
238.7451 -54.0380 13.6 -1 USNO-B1 16.33 14.95 15.56
238.7439 -54.0369 14.2 -1 USNO-B1 17.58 17.15 17.34
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 26 in the list of sources is a candidate afterglow for 1057131_g284 with 3x3 stamp
ra=238.75483 (15:55:01.16) dec=-54.09386 (-54:05:37.9) +/- 1.1" mag=16.25+/-0.35
dist=134.7 REFID=68
*** The position of this source is inconsistent with the XRT position.
The position is 164.1 arc sec from the BAT position.
src: 26 distr. of nearby unmatched sources: 2 0 0 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
238.7575 -54.0887 19.5 -1 USNO-B1 19.57 18.41 18.93
238.7498 -54.0893 19.4 -1 USNO-B1 16.71 15.69 16.14
238.7577 -54.0961 10.1 -1 USNO-B1 99.99 18.11 99.99
238.7544 -54.0948 3.6 -1 USNO-B1 12.86 12.38 12.59 *
238.7467 -54.0918 18.8 -1 USNO-B1 20.45 18.42 19.32
238.7481 -54.0941 14.3 -1 USNO-B1 19.64 18.62 19.07
238.7538 -54.0985 16.9 -1 USNO-B1 99.99 19.53 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 27 in the list of sources is a candidate afterglow for 1057131_g284 with 3x3 stamp
ra=238.75494 (15:55:01.19) dec=-54.09417 (-54:05:39.0) +/- 1.1" mag=15.26+/-0.35
dist=135.6 REFID=16
*** The position of this source is inconsistent with the XRT position.
The position is 164.7 arc sec from the BAT position.
src: 27 distr. of nearby unmatched sources: 2 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
238.7577 -54.0961 9.1 -1 USNO-B1 99.99 18.11 99.99
238.7544 -54.0948 2.7 -1 USNO-B1 12.86 12.38 12.59 *
238.7467 -54.0918 19.5 -1 USNO-B1 20.45 18.42 19.32
238.7481 -54.0941 14.5 -1 USNO-B1 19.64 18.62 19.07
238.7538 -54.0985 15.8 -1 USNO-B1 99.99 19.53 99.99
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 1057131_g284 with 1x1 stamp
ra=238.86707 (15:55:28.10) dec=-54.10347 (-54:06:12.5) +/- 1.1" mag=17.70+/-0.35
dist=227.9 REFID=166
*** The position of this source is inconsistent with the XRT position.
The position is 186.4 arc sec from the BAT position.
src: 35 distr. of nearby unmatched sources: 0 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
238.8665 -54.0980 19.6 -1 USNO-B1 20.30 19.96 20.11
238.8661 -54.1032 2.3 -1 USNO-B1 15.73 14.88 15.26 *
238.8721 -54.1020 11.8 -1 USNO-B1 17.70 16.56 17.07
238.8738 -54.1046 14.8 -1 USNO-B1 17.14 16.08 16.55
238.8686 -54.1079 16.2 -1 USNO-B1 15.56 14.83 15.15
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 40 in the list of sources is a candidate afterglow for 1057131_g284 with 1x1 stamp
ra=238.89114 (15:55:33.87) dec=-54.03319 (-54:01:59.5) +/- 1.1" mag=17.65+/-0.35
dist=243.5 REFID=120
*** The position of this source is inconsistent with the XRT position.
The position is 198.7 arc sec from the BAT position.
src: 40 distr. of nearby unmatched sources: 0 0 0 0 0
Found 8 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
238.8886 -54.0385 19.8 -1 USNO-B1 17.51 17.71 17.62
238.8867 -54.0319 10.6 -1 USNO-B1 20.78 19.54 20.09
238.8891 -54.0332 4.3 -1 USNO-B1 17.17 16.23 16.65
238.8901 -54.0332 2.2 -1 USNO-B1 15.87 15.00 15.39 *
238.8914 -54.0298 12.2 -1 USNO-B1 20.59 19.79 20.15
238.8990 -54.0356 18.8 -1 USNO-B1 16.23 15.48 15.81
238.8975 -54.0337 13.5 -1 USNO-B1 19.57 18.12 18.77
238.8997 -54.0310 19.7 -1 USNO-B1 19.20 18.24 18.67
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
238.7890 -54.0616 5.4 -1 USNO-B1 18.27 17.10 17.62
The closest star is 5.39" away.
List UVOT sources within 10" of the XRT position:
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: 0 good candidate(s) found.
srclist paragraph message for exposure 2 of trigger 1057131
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: high density of stars
SRCLIST PROBLEM: srclist filled telemetry buffer
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB210621 (Swift/BAT trigger 1057131) at 17:04:36 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
257 seconds after the BAT trigger. No credible afterglow candidate has been
found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the
XRT error circle. Because of the density of catalogued stars, further analysis
is required to report an upper limit for any afterglow in the sub-image. The
8'x8' region for the list of sources generated on-board covers 100% of the XRT
error circle. The list of sources is typically complete to about 18.0 mag. No
correction has been made for the large, but uncertain, extinction expected.
------- notes for trigger 1057131 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210621d17h27m47s662102usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1057131
-expid=645988161 -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/1057131/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for bat position. Unreliable extinction found for
xrt position. XRT position found for srclist. XRT position found for Genie
image. BAT position found.
UVOT exposure began at MET 645988161.68692 or about 2021:172:17:09:16 UT
Found 3732 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 35% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 65 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.12 mag.
Found 19 source(s) in Genie image catalog. Found 8 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.12 mag. Found 376 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
41% of the Genie image region.
Genie image analysis:
Found 29253.4 counts in the large background region of 5539.0 pixels or a rate
of 5.281 counts/pixel in a radius of 45.0 arcsec. Based on this background, the
typical 5-sigma UL at a random point in the Genie image is 19.41 mag. for a
4-arcsec aperture.
Found 862.4 counts in the XRT position region of 198.0 pixels or a rate of
4.356 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.185 +/- 0.127 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.381 cps or 19.23 mag. The number of srclist
sources filled the available telemetry. The weakest source detected was 18.21
mag. The closest srclist source has ra= 238.8033 dec= -54.0628 mag=17.36
sep=35.87". The closest Genie source has ra= 238.7818 dec= -54.0693 mag=18.87
sep=30.26".
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?
645988161 257 U srclist found no candidates.
645988161 257 U image found no candidates.
List afterglow candidates for other finding charts.
645987948 44 WHITE srclist found no candidates.
645987948 44 WHITE image found no candidates.
645988765 861 WHITE srclist found no candidates.
645988765 861 ? image data are not available.
------- Tokens for Quick GCN -------