srclist overlap message for exposure 1 of trigger 994165
uvot_overlap.pl vrs. 2010-12-20b fem started at 200901d14h53m04s045853usUT
The observation of trigger 994165 started 2020-09-01T07:12:47.5
Examining file ./994165_g200_uvot_sky_srclist.fits
The exposure ID is 620637167
The exposure time is undefined.
The filter is U.
The uvot region is centered at (217.8749,-38.7136) with a roll angle of 298.3
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 (217.8790,-38.7160) with a radius of 3.000 arc min
This is 0.240 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 (217.8591,-38.7115) with a radius of 0.070 arc min
This is 0.750 arc min from the center of the uvot region
The area of the XRT error circle is 0.015 sq. arc min
The UVOT/XRT overlap is 0.015 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 1 of trigger 994165
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200901d14h53m07s240577usUT
Observation start time is 2020-09-01T07:12:47.5
Examining file ./994165_g200_uvot_catalog_srclist.fits
The exposure ID is 620637167
The exposure is 249.924 sec.
The bin size is 2 pixels
The filter is U
There are 190 detected source(s) for 994165_g200
*** 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 994165_g200 has mag 18.75
Aspect correction adds -0.00033 degrees (-0.079 sec of time = -0.92 arc sec) to RA
Aspect correction adds -0.00023 degrees (-0.83 arcsec) to Dec
Total aspect correction is 1.24 arcsec
Star catalogs centered at 217.8758 , -38.7189 with radius 8.73 arc min.
n_usno: 2142 n_gsc: 0
*** WARNING -- bright star catalog has 7 entries brighter than 12 mag
The brightest has mag 10.63384
RA DEC Mag Color
bright star 0: 217.89782 (14:31:35.48) -38.72103 (-38:43:15.7) 11.95 USNO-R
bright star 1: 217.84867 (14:31:23.68) -38.69181 (-38:41:30.5) 11.85 USNO-V
bright star 2: 217.94843 (14:31:47.62) -38.77503 (-38:46:30.1) 10.63 USNO-V
bright star 3: 217.75154 (14:31:00.37) -38.68527 (-38:41:07.0) 11.58 USNO-V
bright star 4: 217.89597 (14:31:35.03) -38.82423 (-38:49:27.2) 11.68 USNO-V
bright star 5: 217.92765 (14:31:42.64) -38.62064 (-38:37:14.3) 11.54 USNO-R
bright star 6: 217.89107 (14:31:33.86) -38.83829 (-38:50:17.9) 11.88 USNO-V
Mean distance difference (CAT_DELTA) for 165 matched entries is 0.960" for 994165_g200
Mean and std. dev of mag. difference (MAG_DELTA) are 1.561 and 0.808 for 994165_g200
Found 32 entries without IDs and 9 entries that are acceptable afterglow candidates for 994165_g200.
Acceptable entries have no ID, XRT distances < 10.5", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
8 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=217.8790 (14:31:30.96) DEC=-38.7160 (-38:42:57.6)
XRT distances are from RA=217.8591 (14:31:26.19) DEC=-38.7115 (-38:42:41.3)
-----------------
Entry 3 in the list of sources is a candidate afterglow for 994165_g200 with 1x1 stamp
ra=217.85770 (14:31:25.85) dec=-38.70160 (-38:42:05.8) +/- 1.1" mag=17.54+/-0.35
dist=35.8 REFID=111
*** The position of this source is inconsistent with the XRT position.
The position is 79.2 arc sec from the BAT position.
src: 3 distr. of nearby unmatched sources: 0 0 1 0 0
Found 3 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
217.8531 -38.7051 18.2 -1 USNO-B1 19.81 18.34 18.99
217.8564 -38.7022 4.3 -1 USNO-B1 13.93 13.23 13.54
217.8545 -38.6994 11.8 -1 USNO-B1 17.28 16.56 16.88
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 5 in the list of sources is a candidate afterglow for 994165_g200 with 1x1 stamp
ra=217.85395 (14:31:24.95) dec=-38.69977 (-38:41:59.2) +/- 1.1" mag=18.21+/-0.35
dist=44.6 REFID=126
*** The position of this source is inconsistent with the XRT position.
The position is 91.5 arc sec from the BAT position.
src: 5 distr. of nearby unmatched sources: 0 0 1 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
217.8531 -38.7051 19.4 -1 USNO-B1 19.81 18.34 18.99
217.8564 -38.7022 11.1 -1 USNO-B1 13.93 13.23 13.54
217.8545 -38.6994 2.0 -1 USNO-B1 17.28 16.56 16.88 *
217.8490 -38.7021 16.2 -1 USNO-B1 19.59 18.24 18.84
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 9 in the list of sources is a candidate afterglow for 994165_g200 with 1x1 stamp
ra=217.87965 (14:31:31.12) dec=-38.70383 (-38:42:13.8) +/- 1.1" mag=18.04+/-0.35
dist=63.9 REFID=167
*** The position of this source is inconsistent with the XRT position.
The position is 43.8 arc sec from the BAT position.
src: 9 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
217.8791 -38.7043 2.4 -1 USNO-B1 15.93 14.35 15.05 *
217.8780 -38.7018 8.5 -1 USNO-B1 21.64 18.86 20.09
217.8777 -38.7001 14.4 -1 USNO-B1 21.15 19.36 20.15
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 15 in the list of sources is a candidate afterglow for 994165_g200 with 1x1 stamp
ra=217.82039 (14:31:16.89) dec=-38.71247 (-38:42:44.9) +/- 1.1" mag=18.12+/-0.35
dist=108.9 REFID=130
*** The position of this source is inconsistent with the XRT position.
The position is 165.1 arc sec from the BAT position.
src: 15 distr. of nearby unmatched sources: 1 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
217.8249 -38.7115 13.1 -1 USNO-B1 99.99 18.87 99.99
217.8241 -38.7164 17.4 -1 USNO-B1 19.49 17.88 18.59
217.8231 -38.7100 11.7 -1 USNO-B1 18.90 17.91 18.35
217.8190 -38.7125 4.0 -1 USNO-B1 16.40 15.28 15.77 *
217.8187 -38.7127 4.9 -1 USNO-B1 15.79 15.67 15.72
217.8180 -38.7127 6.7 -1 USNO-B1 99.99 16.65 99.99
217.8177 -38.7082 17.1 -1 USNO-B1 18.71 18.16 18.40
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 16 in the list of sources is a candidate afterglow for 994165_g200 with 3x3 stamp
ra=217.82010 (14:31:16.82) dec=-38.71339 (-38:42:48.2) +/- 1.1" mag=17.67+/-0.35
dist=109.9 REFID=47
*** The position of this source is inconsistent with the XRT position.
The position is 165.7 arc sec from the BAT position.
src: 16 distr. of nearby unmatched sources: 1 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
217.8249 -38.7115 15.0 -1 USNO-B1 99.99 18.87 99.99
217.8241 -38.7164 15.4 -1 USNO-B1 19.49 17.88 18.59
217.8231 -38.7100 14.9 -1 USNO-B1 18.90 17.91 18.35
217.8190 -38.7125 4.6 -1 USNO-B1 16.40 15.28 15.77
217.8187 -38.7127 4.8 -1 USNO-B1 15.79 15.67 15.72
217.8180 -38.7127 6.3 -1 USNO-B1 99.99 16.65 99.99
217.8177 -38.7082 19.8 -1 USNO-B1 18.71 18.16 18.40
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 43 in the list of sources is a candidate afterglow for 994165_g200 with 1x1 stamp
ra=217.82206 (14:31:17.29) dec=-38.74509 (-38:44:42.3) +/- 1.1" mag=17.96+/-0.35
dist=159.6 REFID=128
*** The position of this source is inconsistent with the XRT position.
The position is 191.1 arc sec from the BAT position.
src: 43 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
217.8229 -38.7438 5.2 -1 USNO-B1 99.99 18.20 99.99
217.8226 -38.7442 3.7 -1 USNO-B1 18.25 99.99 99.99 *
217.8224 -38.7445 2.4 -1 USNO-B1 17.54 16.71 17.08 *
217.8184 -38.7429 12.8 -1 USNO-B1 18.96 17.76 18.29
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 56 in the list of sources is a candidate afterglow for 994165_g200 with 1x1 stamp
ra=217.87978 (14:31:31.15) dec=-38.76130 (-38:45:40.7) +/- 1.1" mag=17.45+/-0.35
dist=188.5 REFID=121
*** The position of this source is inconsistent with the XRT position.
The position is 163.1 arc sec from the BAT position.
src: 56 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
217.8794 -38.7598 5.5 -1 USNO-B1 16.75 16.19 16.44
217.8787 -38.7621 4.1 -1 USNO-B1 13.78 12.93 13.31 *
217.8760 -38.7622 11.1 -1 USNO-B1 20.72 19.21 19.88
217.8800 -38.7641 10.0 -1 USNO-B1 99.99 18.87 99.99
217.8789 -38.7643 11.2 -1 USNO-B1 22.02 19.46 20.60
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 60 in the list of sources is a candidate afterglow for 994165_g200 with 1x1 stamp
ra=217.92704 (14:31:42.49) dec=-38.72792 (-38:43:40.5) +/- 1.1" mag=18.41+/-0.35
dist=199.7 REFID=183
*** The position of this source is inconsistent with the XRT position.
The position is 141.6 arc sec from the BAT position.
src: 60 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
217.9276 -38.7275 2.0 -1 USNO-B1 17.60 16.17 16.81 *
217.9309 -38.7250 15.1 -1 USNO-B1 99.99 20.31 99.99
217.9323 -38.7261 16.1 -1 USNO-B1 18.89 18.06 18.43
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 68 in the list of sources is a candidate afterglow for 994165_g200 with 3x3 stamp
ra=217.93013 (14:31:43.23) dec=-38.69331 (-38:41:35.9) +/- 1.1" mag=17.46+/-0.35
dist=209.9 REFID=78
*** The position of this source is inconsistent with the XRT position.
The position is 165.3 arc sec from the BAT position.
src: 68 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
217.9250 -38.6948 15.4 -1 USNO-B1 20.19 19.17 19.63
217.9253 -38.6945 14.2 -1 USNO-B1 21.61 18.42 19.84
217.9292 -38.6940 3.6 -1 USNO-B1 13.80 12.68 13.18 *
217.9283 -38.6923 6.2 -1 USNO-B1 20.83 18.51 19.54
217.9279 -38.6918 8.4 -1 USNO-B1 99.99 18.80 99.99
217.9286 -38.6923 5.6 -1 USNO-B1 20.75 17.68 19.04
217.9322 -38.6941 6.3 -1 USNO-B1 16.72 14.93 15.73
217.9358 -38.6928 16.0 -1 USNO-B1 21.15 19.36 20.15
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
217.8604 -38.7128 5.9 -1 USNO-B1 21.47 19.56 20.41
The closest star is 5.94" away.
List UVOT sources within 10" of the XRT position:
There are 1 candidate(s) outside XRT error circle with mag < 17.56
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.12, XRT distances < 10.5",
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 994165
SRCLIST PROBLEM: srclist filled telemetry buffer
------ Start for Possible Stand-alone Circular ----
In response to GRB200901 (Swift/BAT trigger 994165) at 07:09:26 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
175 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
0.09.
------- notes for trigger 994165 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200901d14h53m16s403122usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=994165
-expid=620637167 -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/994165/
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 620637167.49734 or about 2020:245:07:12:42 UT
Found 2138 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 19% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 32 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 13 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 20.14 mag. Found 185 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
21% of the Genie image region.
Genie image analysis:
Found 29331.7 counts in the large background region of 5759.0 pixels or a rate
of 5.093 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 19.62 mag. for a
4-arcsec aperture.
Found 1099.1 counts in the XRT position region of 201.0 pixels or a rate of
5.468 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.407 +/- 0.143 (1-sigma) cps or
19.36 mag and a range from 19.03 to 19.83 mag. The 3-sigma UL at the XRT
position is 0.836 cps or 18.57 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.75 mag. The closest
srclist source has ra= 217.8574 dec= -38.7084 mag=17.93 sep=12.26". The closest
Genie source has ra= 217.8574 dec= -38.7084 mag=17.20 sep=11.93".
This paragraph is only useful if the XRT position is grossly wrong. There are 1
candidate(s) in the srclist data with mag < 17.56 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=217.85770
(14:31:25.85), DEC=-38.70160 (-38:42:05.8) (J2000). It has a mag of 17.54. It
is 79.2" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 250 seconds with the U filter starting
175 seconds after the BAT trigger. There is a candidate afterglow in the list
of sources generated on-board at
RA(J2000) = 14:31:25.85 = 217.85770
DEC(J2000) = -38:42:05.8 = -38.70160
with a 90%-confidence error radius of about 1.10 arc sec. The estimated
magnitude is 17.54 with a 1-sigma error of about 0.35. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.09.
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?
620637167 175 U srclist found no candidates.
620637167 175 U image found no candidates.
List afterglow candidates for other finding charts.
620637846 854 U srclist found no candidates.
620637846 854 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -38.71147
GRB_ERROR: 10.5
GRB_RA: 217.85913
IMAGE_START_TIME: 07:12:42
MAGNITUDE: 18.6
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT