srclist overlap message for exposure 2 of trigger 1059881
uvot_overlap.pl vrs. 2010-12-20b fem started at 210712d18h33m29s145423usUT
The observation of trigger 1059881 started 2021-07-12T09:48:42.7
Examining file ./1059881_g330_uvot_sky_srclist.fits
The exposure ID is 647776122
The exposure time is undefined.
The filter is U.
The uvot region is centered at (97.3308,-35.3687) with a roll angle of 15.8
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 (97.3370,-35.3930) with a radius of 3.000 arc min
This is 1.491 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 28.00 sq. arc min or 0.99 of the BAT error circle
The XRT error circle is centered at (97.3318,-35.3717) with a radius of 0.035 arc min
This is 0.187 arc min from the center of the uvot region
The area of the XRT error circle is 0.004 sq. arc min
The UVOT/XRT overlap is 0.004 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 2 of trigger 1059881
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210712d18h33m44s215783usUT
Observation start time is 2021-07-12T09:48:42.7
Examining file ./1059881_g330_uvot_catalog_srclist.fits
The exposure ID is 647776122
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 54 detected source(s) for 1059881_g330
Aspect correction adds 0.00081 degrees (0.195 sec of time = 2.38 arc sec) to RA
Aspect correction adds 0.00083 degrees ( 2.97 arcsec) to Dec
Total aspect correction is 3.81 arcsec
Star catalogs centered at 97.3375 , -35.3676 with radius 5.88 arc min.
n_usno: 475 n_gsc: 0
*** WARNING -- bright star catalog has 3 entries brighter than 12 mag
The brightest has mag 11.68914
RA DEC Mag Color
bright star 0: 97.33486 (06:29:20.37) -35.35759 (-35:21:27.3) 11.88 USNO-V
bright star 1: 97.37185 (06:29:29.24) -35.42296 (-35:25:22.6) 11.69 USNO-V
bright star 2: 97.40089 (06:29:36.21) -35.44027 (-35:26:25.0) 11.88 USNO-V
Mean distance difference (CAT_DELTA) for 48 matched entries is 0.572" for 1059881_g330
Mean and std. dev of mag. difference (MAG_DELTA) are 1.259 and 0.508 for 1059881_g330
Found 6 entries without IDs and 3 entries that are acceptable afterglow candidates for 1059881_g330.
Acceptable entries have no ID, XRT distances < 5.25", and are > 0.8*(80 - 10*(mag-6))" from any bright star
from any bright star and >21.6" from other rejected sources.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=97.3370 (06:29:20.88) DEC=-35.3930 (-35:23:34.8)
XRT distances are from RA=97.3318 (06:29:19.63) DEC=-35.3717 (-35:22:18.0)
-----------------
Entry 1 in the list of sources is a candidate afterglow for 1059881_g330 with 3x3 stamp
ra=97.34355 (06:29:22.45) dec=-35.36570 (-35:21:56.5) +/- 1.1" mag=18.87+/-0.35
dist=40.7 REFID=53
*** The position of this source is inconsistent with the XRT position.
The position is 100.1 arc sec from the BAT position.
src: 1 distr. of nearby unmatched sources: 0 0 1 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
97.3476 -35.3640 13.5 -1 USNO-B1 16.63 16.08 16.32
97.3487 -35.3630 17.9 -1 USNO-B1 17.99 17.02 17.45
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 4 in the list of sources is a candidate afterglow for 1059881_g330 with 3x3 stamp
ra=97.32622 (06:29:18.29) dec=-35.39523 (-35:23:42.8) +/- 1.1" mag=18.67+/-0.35
dist=86.4 REFID=51
*** The position of this source is inconsistent with the XRT position.
The position is 32.6 arc sec from the BAT position.
src: 4 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
97.3279 -35.3923 11.7 -1 USNO-B1 16.34 15.11 15.66
97.3252 -35.3951 3.1 -1 USNO-B1 16.78 16.00 16.35 *
97.3210 -35.3940 16.0 -1 USNO-B1 21.94 19.94 20.83
97.3233 -35.3954 8.5 -1 USNO-B1 19.33 18.43 18.83
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
-----------------
Entry 9 in the list of sources is a candidate afterglow for 1059881_g330 with 3x3 stamp
ra=97.36657 (06:29:27.98) dec=-35.37773 (-35:22:39.8) +/- 1.1" mag=18.87+/-0.35
dist=104.4 REFID=52
*** The position of this source is inconsistent with the XRT position.
The position is 102.7 arc sec from the BAT position.
src: 9 distr. of nearby unmatched sources: 0 0 0 0 1
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
Found 0 entries in star catalog(s) within 10" of the XRT position.
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 < 5.25",
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 1059881
------ Start for Possible Stand-alone Circular ----
In response to GRB210712 (Swift/BAT trigger 1059881) at 09:43:11 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
303 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
0.076.
------- notes for trigger 1059881 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210712d18h33m47s440779usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1059881
-expid=647776122 -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/1059881/
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 647776122.68754 or about 2021:193:09:48:37 UT
Found 471 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 9% of the srclist region. Found 54 sources in
srclist catalog. Found 6 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 10 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 19.73 mag. Found 82 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
10% of the Genie image region.
Genie image analysis:
Found 65698.2 counts in the large background region of 6097.0 pixels or a rate
of 10.775 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 19.02 mag. for a
4-arcsec aperture.
Found 2009.5 counts in the XRT position region of 197.0 pixels or a rate of
10.201 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is -0.102 +/- 0.193 (1-sigma) cps. The
3-sigma UL at the XRT position is 0.579 cps or 18.78 mag. The closest srclist
source has ra= 97.3435 dec= -35.3657 mag=18.87 sep=40.66". The closest Genie
source has ra= 97.3278 dec= -35.3620 mag=17.85 sep=36.76".
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?
647776122 302 U srclist found no candidates.
647776122 302 U image found no candidates.
List afterglow candidates for other finding charts.
647775909 89 WHITE srclist found no candidates.
647775909 89 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -35.37167
GRB_ERROR: 5.25
GRB_RA: 97.33179
IMAGE_START_TIME: 09:48:37
MAGNITUDE: 18.8
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT