srclist overlap message for exposure 2 of trigger 1016881
uvot_overlap.pl vrs. 2010-12-20b fem started at 210112d04h19m00s042132usUT
The observation of trigger 1016881 started 2021-01-12T01:42:26.0
Examining file ./1016881_g321_uvot_sky_srclist.fits
The exposure ID is 632108545
The exposure time is undefined.
The filter is U.
The uvot region is centered at (219.0109,33.0561) with a roll angle of 116.2
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 (218.9990,33.0700) with a radius of 3.000 arc min
This is 1.024 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 28.45 sq. arc min or 1.01 of the BAT error circle
The XRT error circle is centered at (219.0060,33.0542) with a radius of 0.028 arc min
This is 0.271 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 1016881
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210112d04h19m10s215972usUT
Observation start time is 2021-01-12T01:42:26.0
Examining file ./1016881_g321_uvot_catalog_srclist.fits
The exposure ID is 632108545
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 12 detected source(s) for 1016881_g321
Aspect correction adds 0.00132 degrees (0.316 sec of time = 3.97 arc sec) to RA
Aspect correction adds -0.00007 degrees (-0.27 arcsec) to Dec
Total aspect correction is 3.98 arcsec
Star catalogs centered at 219.0165 , 33.0708 with radius 6.02 arc min.
n_usno: 388 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 10 matched entries is 0.504" for 1016881_g321
Mean and std. dev of mag. difference (MAG_DELTA) are 1.751 and 0.763 for 1016881_g321
Found 2 entries without IDs and 0 entries that are acceptable afterglow candidates for 1016881_g321.
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.
Magnitude criteria will be applied later.
BAT distances are from RA=218.9990 (14:35:59.76) DEC=33.0700 (+33:04:12.0)
XRT distances are from RA=219.0060 (14:36:01.45) DEC=33.0542 (+33:03:15.0)
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 2:
ra=219.03992 dec= 33.01012 +/- 1.1" mag=18.65+/-0.35 dist=188.7 REFID=12
Found 0 entries in star catalog(s) within 10" of the XRT position.
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 1016881
------ Start for Possible Stand-alone Circular ----
In response to GRB210112 (Swift/BAT trigger 1016881) at 01:37:03 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
295 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
0.014.
------- notes for trigger 1016881 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210112d04h19m12s014188usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1016881
-expid=632108545 -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/1016881/
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 632108545.96608 or about 2021:012:01:42:20 UT
Found 384 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 12 sources in
srclist catalog. Found 2 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 1 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 20.39 mag. Found 46 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 7% of the
Genie image region.
Genie image analysis:
Found 19896.3 counts in the large background region of 6210.0 pixels or a rate
of 3.204 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 19.69 mag. for a
4-arcsec aperture.
Found 666.4 counts in the XRT position region of 202.0 pixels or a rate of
3.299 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.106 +/- 0.112 (1-sigma) cps or
20.63 mag and a range from 19.85 to 99.99 mag. The 3-sigma UL at the XRT
position is 0.441 cps or 19.08 mag. The closest srclist source has ra= 219.0238
dec= 33.0885 mag=17.82 sep=134.88". The closest Genie source has ra= 219.0066
dec= 33.0596 mag=20.47 sep=19.54".
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?
632108545 294 U srclist found no candidates.
632108545 294 U image found no candidates.
List afterglow candidates for other finding charts.
632108333 82 WHITE 219.00638 33.05416 19.77/19.2 1.0 srclist Yes
632108333 82 WHITE 219.00606 33.05428 19.52/20.8 0.4 image Yes
632109122 871 WHITE srclist found no candidates.
632109122 871 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 33.05417
GRB_ERROR: 5
GRB_RA: 219.00604
IMAGE_START_TIME: 01:42:20
MAGNITUDE: 19.1
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT