srclist overlap message for exposure 1 of trigger 1071993
uvot_overlap.pl vrs. 2010-12-20b fem started at 210905d02h28m08s257875usUT
The observation of trigger 1071993 started 2021-09-05T00:15:46.0
Examining file ./1071993_g183_uvot_sky_srclist.fits
The exposure ID is 652493745
The exposure time is undefined.
The filter is U.
The uvot region is centered at (309.0353,-44.4673) with a roll angle of 229.6
It is square with sides of 17.13 arc min. for an area of 293.61 sq arc min
The BAT error circle is centered at (309.0620,-44.4310) with a radius of 3.000 arc min
This is 2.460 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 (309.0482,-44.4396) with a radius of 0.043 arc min
This is 1.754 arc min from the center of the uvot region
The area of the XRT error circle is 0.006 sq. arc min
The UVOT/XRT overlap is 0.006 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 1 of trigger 1071993
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210905d02h28m10s895614usUT
Observation start time is 2021-09-05T00:15:46.0
Examining file ./1071993_g183_uvot_catalog_srclist.fits
The exposure ID is 652493745
The exposure is 249.924 sec.
The bin size is 2 pixels
The filter is U
There are 190 detected source(s) for 1071993_g183
*** 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 1071993_g183 has mag 19.58
Aspect correction adds 0.00080 degrees (0.192 sec of time = 2.06 arc sec) to RA
Aspect correction adds -0.00046 degrees (-1.64 arcsec) to Dec
Total aspect correction is 2.64 arcsec
Star catalogs centered at 309.0374 , -44.4418 with radius 9.44 arc min.
n_usno: 1243 n_gsc: 0
*** WARNING -- bright star catalog has 6 entries brighter than 12 mag
The brightest has mag 6.41886
RA DEC Mag Color
bright star 0: 308.89544 (20:35:34.90) -44.48149 (-44:28:53.3) 10.41 USNO-V
bright star 1: 308.97057 (20:35:52.94) -44.33769 (-44:20:15.7) 11.50 USNO-V
bright star 2: 308.89730 (20:35:35.35) -44.37519 (-44:22:30.7) 11.71 USNO-V
bright star 3: 308.94920 (20:35:47.81) -44.33761 (-44:20:15.4) 6.42 USNO-V
bright star 4: 308.85839 (20:35:26.01) -44.44094 (-44:26:27.4) 11.85 USNO-V
bright star 5: 308.92934 (20:35:43.04) -44.33766 (-44:20:15.6) 10.98 USNO-R
Mean distance difference (CAT_DELTA) for 121 matched entries is 0.923" for 1071993_g183
Mean and std. dev of mag. difference (MAG_DELTA) are 1.342 and 1.192 for 1071993_g183
Found 73 entries without IDs and 12 entries that are acceptable afterglow candidates for 1071993_g183.
Acceptable entries have no ID, XRT distances < 6.5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
6 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=309.0620 (20:36:14.88) DEC=-44.4310 (-44:25:51.6)
XRT distances are from RA=309.0482 (20:36:11.58) DEC=-44.4396 (-44:26:22.4)
*** WARNING 38 per cent of entries have no IDs.
-----------------
Entry 1 in the list of sources is a candidate afterglow for 1071993_g183 with 1x1 stamp
ra=309.03823 (20:36:09.17) dec=-44.44182 (-44:26:30.6) +/- 1.1" mag=18.79+/-0.35
dist=27.0 REFID=170
*** The position of this source is inconsistent with the XRT position.
The position is 72.5 arc sec from the BAT position.
src: 1 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
309.0343 -44.4419 10.2 -1 USNO-B1 14.80 13.82 14.26
309.0408 -44.4420 6.7 -1 USNO-B1 16.36 15.25 15.74
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 11 in the list of sources is a candidate afterglow for 1071993_g183 with 1x1 stamp
ra=309.09337 (20:36:22.41) dec=-44.44155 (-44:26:29.6) +/- 1.1" mag=18.96+/-0.35
dist=116.2 REFID=109
*** The position of this source is inconsistent with the XRT position.
The position is 89.1 arc sec from the BAT position.
src: 11 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
309.0877 -44.4442 17.5 -1 USNO-B1 20.40 21.08 20.78
309.0931 -44.4421 2.0 -1 USNO-B1 18.71 18.60 18.65 *
309.0953 -44.4365 18.9 -1 USNO-B1 19.21 17.87 18.46
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 15 in the list of sources is a candidate afterglow for 1071993_g183 with 1x1 stamp
ra=309.02622 (20:36:06.29) dec=-44.40530 (-44:24:19.1) +/- 1.1" mag=18.96+/-0.35
dist=135.7 REFID=168
*** The position of this source is inconsistent with the XRT position.
The position is 130.5 arc sec from the BAT position.
src: 15 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
309.0264 -44.4060 2.4 -1 USNO-B1 17.86 16.57 17.14 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 18 in the list of sources is a candidate afterglow for 1071993_g183 with 1x1 stamp
ra=309.09588 (20:36:23.01) dec=-44.45531 (-44:27:19.1) +/- 1.1" mag=18.96+/-0.35
dist=134.9 REFID=146
*** The position of this source is inconsistent with the XRT position.
The position is 123.4 arc sec from the BAT position.
src: 18 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
309.0900 -44.4586 19.3 -1 USNO-B1 20.29 20.18 20.23
309.0970 -44.4555 3.0 -1 USNO-B1 16.97 15.89 16.37 *
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 1071993_g183 with 1x1 stamp
ra=309.09633 (20:36:23.12) dec=-44.45553 (-44:27:19.9) +/- 1.1" mag=18.79+/-0.35
dist=136.3 REFID=147
*** The position of this source is inconsistent with the XRT position.
The position is 124.8 arc sec from the BAT position.
src: 19 srclist_match has ID
src: 19 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
309.0900 -44.4586 19.8 -1 USNO-B1 20.29 20.18 20.23
309.0970 -44.4555 1.8 -1 USNO-B1 16.97 15.89 16.37 *
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 1071993_g183 with 1x1 stamp
ra=309.09292 (20:36:22.30) dec=-44.46458 (-44:27:52.5) +/- 1.1" mag=18.96+/-0.35
dist=145.9 REFID=128
*** The position of this source is inconsistent with the XRT position.
The position is 144.7 arc sec from the BAT position.
src: 23 distr. of nearby unmatched sources: 1 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
309.0937 -44.4646 2.1 -1 USNO-B1 17.52 16.39 16.89 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 24 in the list of sources is a candidate afterglow for 1071993_g183 with 1x1 stamp
ra=309.09370 (20:36:22.49) dec=-44.46388 (-44:27:50.0) +/- 1.1" mag=18.96+/-0.35
dist=146.0 REFID=154
*** The position of this source is inconsistent with the XRT position.
The position is 143.7 arc sec from the BAT position.
src: 24 distr. of nearby unmatched sources: 1 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
309.0937 -44.4646 2.7 -1 USNO-B1 17.52 16.39 16.89 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 31 in the list of sources is a candidate afterglow for 1071993_g183 with 1x1 stamp
ra=309.07431 (20:36:17.84) dec=-44.48110 (-44:28:51.9) +/- 1.1" mag=18.96+/-0.35
dist=163.8 REFID=171
*** The position of this source is inconsistent with the XRT position.
The position is 183.1 arc sec from the BAT position.
src: 31 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
309.0705 -44.4794 11.6 -1 USNO-B1 18.78 17.35 17.98
309.0759 -44.4791 8.2 -1 USNO-B1 20.42 20.42 20.42
309.0735 -44.4833 8.3 -1 USNO-B1 19.67 19.54 19.60
309.0777 -44.4826 10.1 -1 USNO-B1 20.14 19.85 19.98
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 33 in the list of sources is a candidate afterglow for 1071993_g183 with 1x1 stamp
ra=309.11263 (20:36:27.03) dec=-44.44115 (-44:26:28.1) +/- 1.1" mag=18.96+/-0.35
dist=165.6 REFID=155
*** The position of this source is inconsistent with the XRT position.
The position is 135.2 arc sec from the BAT position.
src: 33 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
309.1130 -44.4420 3.1 -1 USNO-B1 18.36 17.40 17.83 *
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 1071993_g183 with 1x1 stamp
ra=309.09282 (20:36:22.28) dec=-44.40419 (-44:24:15.1) +/- 1.1" mag=18.96+/-0.35
dist=171.3 REFID=187
*** The position of this source is inconsistent with the XRT position.
The position is 124.9 arc sec from the BAT position.
src: 35 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
309.0881 -44.4011 16.4 -1 USNO-B1 16.97 16.21 16.55
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 61 in the list of sources is a candidate afterglow for 1071993_g183 with 1x1 stamp
ra=309.12442 (20:36:29.86) dec=-44.46037 (-44:27:37.3) +/- 1.1" mag=18.96+/-0.35
dist=209.6 REFID=150
*** The position of this source is inconsistent with the XRT position.
The position is 192.1 arc sec from the BAT position.
src: 61 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
309.1175 -44.4605 17.8 -1 USNO-B1 20.45 20.51 20.48
309.1205 -44.4566 17.0 -1 USNO-B1 19.76 20.01 19.90
309.1286 -44.4612 11.1 -1 USNO-B1 20.32 19.82 20.04
309.1293 -44.4647 20.0 -1 USNO-B1 20.36 20.34 20.35
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 69 in the list of sources is a candidate afterglow for 1071993_g183 with 3x3 stamp
ra=309.06263 (20:36:15.03) dec=-44.37642 (-44:22:35.1) +/- 1.1" mag=19.36+/-0.35
dist=230.3 REFID=94
*** The position of this source is inconsistent with the XRT position.
The position is 196.5 arc sec from the BAT position.
src: 69 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
309.0657 -44.3808 17.7 -1 USNO-B1 16.85 15.62 16.17
309.0621 -44.3768 2.1 -1 USNO-B1 17.28 15.93 16.53 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Found 2 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
309.0484 -44.4368 9.8 -1 USNO-B1 19.55 20.36 20.00
309.0490 -44.4372 8.8 -1 USNO-B1 19.38 18.95 19.14
The closest star is 8.76" away.
List UVOT sources within 10" of the XRT position:
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.12, XRT distances < 6.5",
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 1 of trigger 1071993
SRCLIST PROBLEM: srclist filled telemetry buffer
------ Start for Possible Stand-alone Circular ----
In response to GRB210905 (Swift/BAT trigger 1071993) at 00:12:41 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
156 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. The typical 3-sigma upper limit has been about 19.2 mag. 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 expected extinction corresponding to E(B-V) of
0.034.
------- notes for trigger 1071993 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210905d02h28m19s898374usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1071993
-expid=652493745 -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/1071993/
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 652493745.96298 or about 2021:248:00:15:40 UT
Found 1239 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 9% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 73 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 14 source(s) in Genie image catalog. Found 0 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.54 mag. Found 72 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
9% of the Genie image region.
Genie image analysis:
Found 13883.6 counts in the large background region of 5695.0 pixels or a rate
of 2.438 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 19.83 mag. for a
4-arcsec aperture.
Found 458.8 counts in the XRT position region of 200.0 pixels or a rate of
2.294 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.014 +/- 0.094 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.281 cps or 19.56 mag. The number of srclist
sources filled the available telemetry. The weakest source detected was 19.58
mag. The closest srclist source has ra= 309.0410 dec= -44.4421 mag=17.29
sep=20.70". The closest Genie source has ra= 309.0420 dec= -44.4365 mag=20.29
sep=19.44".
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?
652493745 156 U srclist found no candidates.
652493745 156 U image found no candidates.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -44.43956
GRB_ERROR: 6.5
GRB_RA: 309.04825
IMAGE_START_TIME: 00:15:40
MAGNITUDE: 19.6
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT