srclist overlap message for exposure 1 of trigger 999948
uvot_overlap.pl vrs. 2010-12-20b fem started at 201013d08h45m18s946313usUT
The observation of trigger 999948 started 2020-10-13T03:48:10.1
Examining file ./999948_g99_uvot_sky_srclist.fits
The exposure ID is 624253690
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (107.4028,57.0358) with a roll angle of 93.2
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 (107.3880,57.0360) with a radius of 3.000 arc min
This is 0.482 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 (107.3942,57.0342) with a radius of 0.032 arc min
This is 0.293 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 1 of trigger 999948
find_uvot_ag.pl vrs. 2017-02-17 fem started at 201013d08h45m23s673590usUT
Observation start time is 2020-10-13T03:48:10.1
Examining file ./999948_g99_uvot_catalog_srclist.fits
The exposure ID is 624253690
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 92 detected source(s) for 999948_g99
Aspect correction adds 0.00209 degrees (0.502 sec of time = 4.09 arc sec) to RA
Aspect correction adds -0.00087 degrees (-3.11 arcsec) to Dec
Total aspect correction is 5.14 arcsec
Star catalogs centered at 107.3957 , 57.0416 with radius 5.65 arc min.
n_usno: 532 n_gsc: 0
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 8.69072
RA DEC Mag Color
bright star 0: 107.43117 (07:09:43.48) 57.01833 (+57:01:06.0) 11.18 USNO-V
bright star 1: 107.34346 (07:09:22.43) 57.10908 (+57:06:32.7) 8.69 USNO-V
Mean distance difference (CAT_DELTA) for 62 matched entries is 0.910" for 999948_g99
Mean and std. dev of mag. difference (MAG_DELTA) are 1.864 and 0.573 for 999948_g99
Found 33 entries without IDs and 3 entries that are acceptable afterglow candidates for 999948_g99.
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.
28 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=107.3880 (07:09:33.12) DEC=57.0360 (+57:02:09.6)
XRT distances are from RA=107.3942 (07:09:34.62) DEC=57.0342 (+57:02:03.2)
*** WARNING 35 per cent of entries have no IDs.
-----------------
Entry 23 in the list of sources is a candidate afterglow for 999948_g99 with 3x3 stamp
ra=107.33121 (07:09:19.49) dec=57.04540 (+57:02:43.4) +/- 1.1" mag=20.07+/-0.35
dist=129.9 REFID=88
*** The position of this source is inconsistent with the XRT position.
The position is 116.3 arc sec from the BAT position.
src: 23 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
107.3354 57.0464 9.0 -1 USNO-B1 20.61 99.99 99.99
107.3315 57.0466 4.4 -1 USNO-B1 13.24 11.54 12.29 *
107.3309 57.0438 5.9 -1 USNO-B1 99.99 19.44 99.99
107.3318 57.0491 13.3 -1 USNO-B1 20.90 18.96 19.82
107.3275 57.0470 9.3 -1 USNO-B1 19.83 20.15 20.01
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 29 in the list of sources is a candidate afterglow for 999948_g99 with 3x3 stamp
ra=107.44027 (07:09:45.66) dec=57.00449 (+57:00:16.2) +/- 1.1" mag=19.46+/-0.35
dist=140.0 REFID=54
*** The position of this source is inconsistent with the XRT position.
The position is 152.8 arc sec from the BAT position.
src: 29 srclist_match has ID
src: 29 distr. of nearby unmatched sources: 1 0 0 0 1
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
107.4384 57.0049 3.9 -1 USNO-B1 19.41 19.07 19.22 *
107.4394 57.0046 1.8 -1 USNO-B1 16.69 15.25 15.89 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 35 in the list of sources is a candidate afterglow for 999948_g99 with 3x3 stamp
ra=107.45166 (07:09:48.40) dec=57.00607 (+57:00:21.8) +/- 1.1" mag=20.03+/-0.35
dist=151.5 REFID=84
*** The position of this source is inconsistent with the XRT position.
The position is 164.9 arc sec from the BAT position.
src: 35 distr. of nearby unmatched sources: 0 0 0 0 1
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
107.4544 57.0092 12.7 -1 USNO-B1 19.82 18.60 19.14
107.4563 57.0094 15.0 -1 USNO-B1 19.95 20.29 20.14
107.4518 57.0069 3.1 -1 USNO-B1 19.21 16.87 17.91 *
107.4526 57.0038 8.3 -1 USNO-B1 21.42 19.88 20.56
107.4525 57.0035 9.5 -1 USNO-B1 20.85 99.99 99.99
107.4569 57.0053 10.6 -1 USNO-B1 20.84 19.75 20.23
107.4572 57.0046 12.0 -1 USNO-B1 21.13 19.55 20.25
107.4516 57.0012 17.6 -1 USNO-B1 99.99 20.41 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
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
107.3935 57.0342 1.5 -1 USNO-B1 16.24 16.19 16.21
The closest star is 1.47" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=107.39371 (07:09:34.49) dec=57.03418 (+57:02:03.0) +/- 1.1" mag=17.48+/-0.35 dist=1.1 REFID=18
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 19.22, 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 1 of trigger 999948
1 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB201013 (Swift/BAT trigger 999948) at 03:46:30 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 73 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 19.6 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 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.05.
------- notes for trigger 999948 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 201013d08h45m32s584602usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=999948
-expid=624253690 -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/999948/
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 624253690.12788 or about 2020:287:03:48:05 UT
Found 528 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 11% of the srclist region. Found 92 sources in
srclist catalog. Found 33 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
Found 12 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. 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
20.82 mag. Found 104 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 11% of the Genie image region.
Genie image analysis:
Found 43394.4 counts in the large background region of 5892.0 pixels or a rate
of 7.365 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 20.27 mag. for a
4-arcsec aperture.
Found 4741.2 counts in the XRT position region of 199.0 pixels or a rate of
23.825 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 21.616 +/- 0.471 (1-sigma) cps or
16.44 mag and a range from 16.42 to 16.47 mag. The 3-sigma UL at the XRT
position is 23.028 cps or 16.37 mag.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 107.3937 dec= 57.0342 mag=17.48 sep=1.07".
The closest srclist source has ra= 107.3937 dec= 57.0342 mag=17.48 sep=1.07".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 107.3935 dec= 57.0341 mag=16.50 sep=1.50". The closest Genie
source has ra= 107.3935 dec= 57.0341 mag=16.50 sep=1.50".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 73 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 07:09:34.44 = 107.39350
DEC(J2000) = +57:02:02.9 = 57.03414
with a 90%-confidence error radius of about 0.61 arc sec. This position is 1.50
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.50 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.05.
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?
624253690 73 WHITE srclist found no candidates.
624253690 73 WHITE image found no candidates.
List afterglow candidates for other finding charts.
624253902 285 U srclist found no candidates.
624253902 285 U image found no candidates.
624254481 864 WHITE srclist found no candidates.
624254481 864 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 57.03422
GRB_ERROR: 5
GRB_RA: 107.39425
IMAGE_START_TIME: 03:48:05
MAGNITUDE: 16.4
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT