image overlap message for exposure 3 of trigger 1016881
uvot_overlap.pl vrs. 2010-12-20b fem started at 210112d04h19m02s171938usUT
The observation of trigger 1016881 started 2021-01-12T01:52:02.2
Examining file ./1016881_g898_uvot_sky_image.fits
The exposure ID is 632109122
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (219.0117,33.0556) with a roll angle of 116.2
It is square with sides of 2.68 arc min. for an area of 7.17 sq arc min
The BAT error circle is centered at (218.9990,33.0700) with a radius of 3.000 arc min
This is 1.076 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 7.17 sq. arc min or 0.25 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 0.300 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
image afterglow message for exposure 3 of trigger 1016881
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210112d04h19m16s929611usUT
Observation start time is 2021-01-12T01:52:02.2
Examining file ./1016881_g898_uvot_catalog_image.fits
The exposure ID is 632109122
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 1 detected source(s) for 1016881_g898
Aspect correction adds 0.00105 degrees (0.252 sec of time = 3.16 arc sec) to RA
Aspect correction adds -0.00043 degrees (-1.55 arcsec) to Dec
Total aspect correction is 3.52 arcsec
Star catalogs centered at 219.0076 , 33.0594 with radius 2.00 arc min.
n_usno: 50 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 1 matched entries is 1.071" for 1016881_g898
Mean and std. dev of mag. difference (MAG_DELTA) are 1.038 and 0.000 for 1016881_g898
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1016881_g898.
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 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 1.3442092E+05 counts in the bkg source region of 6201.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 21.677 counts/pixel (5-sig UL in 4" is 19.68 mag) for 1016881_g898
There are 4455.2495 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 22.165 counts/pixel for 1016881_g898
There are 24586.959 counts in the xrt_bkg source region of 1140.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 21.568 counts/pixel (5-sig UL in 4" is 19.68 mag) for 1016881_g898
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 20.23, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1016881_632109122_210112d04h19m16s929611usUT_bkg.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(219.0117,33.0556,45")
fk5;-circle(219.006769276014,33.0597297013467,6")
Region file: 1016881_632109122_210112d04h19m16s929611usUT_xrt.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(219.00604,33.05417,8")
Region file: 1016881_632109122_210112d04h19m16s929611usUT_xrt_bkg.region
# Region file format: DS9 version 3.0
global color=red font="helvetica 10 normal" select=1 edit=1 move=1 delete=1 include=1 fixed=0 source
fk5;circle(219.00604,33.05417,25")
fk5;-circle(219.00604,33.05417,15")
fk5;-circle(219.006769276014,33.0597297013467,6")
image paragraph message for exposure 3 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 150 seconds with the White filter
starting 872 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
0.014.
------- notes for trigger 1016881 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210112d04h19m20s326231usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1016881
-expid=632109122 -meonly -msg_image
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 632109122.1603 or about 2021:012:01:51:57 UT
Found 723 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 44 sources in
srclist catalog. Found 9 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 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 20.23 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 134420.9 counts in the large background region of 6201.0 pixels or a rate
of 21.677 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 19.50 mag. for a
4-arcsec aperture.
Found 4455.2 counts in the XRT position region of 201.0 pixels or a rate of
22.165 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.801 +/- 0.482 (1-sigma) cps or
19.84 mag and a range from 19.33 to 20.84 mag. The 3-sigma UL at the XRT
position is 2.246 cps or 18.72 mag. The closest srclist source has ra= 219.0505
dec= 33.0547 mag=19.05 sep=134.06". The closest Genie source has ra= 219.0068
dec= 33.0597 mag=19.74 sep=20.14".
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?
632109122 871 WHITE srclist found no candidates.
632109122 871 WHITE 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
632108545 294 U srclist found no candidates.
632108545 294 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 33.05417
GRB_ERROR: 5
GRB_RA: 219.00604
IMAGE_START_TIME: 01:51:57
MAGNITUDE: 18.7
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT