srclist overlap message for exposure 3 of trigger 1013852


uvot_overlap.pl vrs. 2010-12-20b fem started at 201221d18h59m42s037598usUT

The observation of trigger 1013852 started 2020-12-21T07:24:07.0
Examining file ./1013852_g905_uvot_sky_srclist.fits
The exposure ID is 630228247
The exposure time is undefined.
The filter is WHITE.

The uvot region is centered at (214.4865,-45.4118) with a roll angle of 83.1
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 (214.4770,-45.4110) with a radius of 3.000 arc min
This is 0.402 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 (214.4802,-45.4162) with a radius of 0.025 arc min
This is 0.375 arc min from the center of the uvot region
The area of the XRT error circle is 0.002 sq. arc min
The UVOT/XRT overlap is 0.002 sq. arc min or 1.00 of the XRT error circle



srclist afterglow message for exposure 3 of trigger 1013852


find_uvot_ag.pl vrs. 2020-10-30 fem started at 201221d18h59m59s277279usUT

Observation start time is 2020-12-21T07:24:07.0
Examining file ./1013852_g905_uvot_catalog_srclist.fits
The exposure ID is 630228247
The exposure is 71.683 sec.
The bin size is 2 pixels
The filter is WHITE
There are 190 detected source(s) for 1013852_g905
*** 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 1013852_g905 has mag 19.21
Aspect correction adds 0.00078 degrees (0.186 sec of time = 1.96 arc sec) to RA
Aspect correction adds -0.00044 degrees (-1.60 arcsec) to Dec
Total aspect correction is 2.53 arcsec
Star catalogs centered at 214.5033 , -45.3943 with radius 8.17 arc min.
n_usno: 3036 n_gsc: 0
*** WARNING -- bright star catalog has 3 entries brighter than 12 mag
The brightest has mag 9.35
                        RA                      DEC              Mag  Color
bright star  0: 214.50633 (14:18:01.52) -45.45834 (-45:27:30.0)  9.35 USNO-R
bright star  1: 214.45684 (14:17:49.64) -45.29397 (-45:17:38.3) 10.88 USNO-V
bright star  2: 214.50637 (14:18:01.53) -45.50512 (-45:30:18.4) 11.34 USNO-V
Mean distance difference (CAT_DELTA) for 192 matched entries is 0.760" for 1013852_g905
Mean and std. dev of mag. difference (MAG_DELTA) are 2.182 and 0.743 for 1013852_g905
Found 12 entries without IDs and 1 entries that are acceptable afterglow candidates for 1013852_g905.
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.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=214.4770 (14:17:54.48) DEC=-45.4110 (-45:24:39.6)
XRT distances are from RA=214.4802 (14:17:55.24) DEC=-45.4162 (-45:24:58.3)

-----------------
Entry 46 in the list of sources is a candidate afterglow for 1013852_g905 with 1x1 stamp
 ra=214.45801 (14:17:49.92) dec=-45.35989 (-45:21:35.6) +/- 1.1" mag=18.93+/-0.35
 dist=210.3 REFID=128
*** The position of this source is inconsistent with the XRT position.
    The position is 190.8 arc sec from the BAT position.
 src: 46 srclist_match has ID
 src: 46 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 
  214.4598 -45.3609   5.9    -1 USNO-B1  21.56  19.32  20.31
  214.4581 -45.3595   1.4    -1 USNO-B1  16.61  15.77  16.14 *
  214.4599 -45.3584   7.1    -1 USNO-B1  18.53  16.70  17.51
  214.4572 -45.3591   3.5    -1 USNO-B1  17.85  17.51  17.66 *
  214.4570 -45.3589   4.4    -1 USNO-B1  19.09  18.25  18.62
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
214.4814 -45.4181 7.6 -1 USNO-B1 20.87 19.66 20.19
The closest star is 7.63" away.

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 18.82, 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 3 of trigger 1013852


SRCLIST PROBLEM: srclist filled telemetry buffer

------ Start for Possible Stand-alone Circular ----

In response to GRB201221 (Swift/BAT trigger 1013852) at 07:09:01 UT,

---- UVOT paragraph for Joint or Stand-alone Circular ----

UVOT took a finding chart exposure of 72 seconds with the White filter
starting 879 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
0.11.

------- notes for trigger 1013852 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 201221d19h00m03s885748usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1013852
-expid=630228247 -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/1013852/
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 630228247.0074 or about 2020:356:07:24:02 UT

Found 3032 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 31% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 12 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.82 mag.

Found 19 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 19.50 mag. Found 267 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
28% of the Genie image region.

Genie image analysis:
Found 108300.4 counts in the large background region of 5630.0 pixels or a rate
of 19.236 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 18.77 mag. for a
4-arcsec aperture.
Found 3857.8 counts in the XRT position region of 198.0 pixels or a rate of
19.484 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.732 +/- 0.933 (1-sigma) cps or
19.94 mag and a range from 19.05 to 99.99 mag. The 3-sigma UL at the XRT
position is 3.531 cps or 18.23 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 19.21 mag. The closest
srclist source has ra= 214.4852 dec= -45.4219 mag=19.03 sep=24.14". The closest
Genie source has ra= 214.4851 dec= -45.4219 mag=17.94 sep=24.12".

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?
630228247  879 WHITE srclist found no candidates.
630228247  879 WHITE image found no candidates.
List afterglow candidates for other finding charts.
630227509  141 WHITE srclist found no candidates.
630227509  141 WHITE image found no candidates.
630227667  299 U srclist found no candidates.
630227667  299 U image found no candidates.

------- Tokens for Quick GCN -------

CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -45.41619
GRB_ERROR: 5
GRB_RA: 214.48017
IMAGE_START_TIME: 07:24:02
MAGNITUDE: 18.2
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT