srclist overlap message for exposure 1 of trigger 1014012
uvot_overlap.pl vrs. 2010-12-20b fem started at 201221d18h57m30s670392usUT
The observation of trigger 1014012 started 2020-12-21T18:44:16.0
Examining file 1014012_g162_uvot_sky_srclist.fits
The exposure ID is 630269056
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (278.2028,34.4055) with a roll angle of 188.4
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 (278.2050,34.4110) with a radius of 3.000 arc min
This is 0.349 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
Could not find the location of an XRT error circle
srclist afterglow message for exposure 1 of trigger 1014012
find_uvot_ag.pl vrs. 2020-10-30 fem started at 201221d18h57m31s686732usUT
Observation start time is 2020-12-21T18:44:16.0
Examining file 1014012_g162_uvot_catalog_srclist.fits
The exposure ID is 630269056
The exposure is 149.860 sec.
The bin size is 2 pixels
The filter is WHITE
There are 115 detected source(s) for 1014012_g162
Aspect correction adds 0.00014 degrees (0.033 sec of time = 0.41 arc sec) to RA
Aspect correction adds 0.00041 degrees ( 1.47 arcsec) to Dec
Total aspect correction is 1.53 arcsec
Star catalogs centered at 278.1991 , 34.4045 with radius 6.22 arc min.
n_usno: 836 n_gsc: 0
*** WARNING -- bright star catalog has 2 entries brighter than 12 mag
The brightest has mag 11.45206
RA DEC Mag Color
bright star 0: 278.12208 (18:32:29.30) 34.44694 (+34:26:49.0) 11.45 USNO-V
bright star 1: 278.26305 (18:33:03.13) 34.49151 (+34:29:29.4) 11.48 USNO-V
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 114 matched entries is 0.660" for 1014012_g162
Mean and std. dev of mag. difference (MAG_DELTA) are 1.514 and 0.515 for 1014012_g162
Found 3 entries without IDs and 1 entries that are acceptable afterglow candidates for 1014012_g162.
Acceptable entries have no ID, BAT distance < 200" or XRT distance < 10", 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=278.2050 (18:32:49.20) DEC=34.4110 (+34:24:39.6)
XRT distances are as reported in catalog file.
-----------------
Entry 33 in the list of sources is a candidate afterglow for 1014012_g162 with 3x3 stamp
ra=278.15750 (18:32:37.80) dec=34.40897 (+34:24:32.3) +/- 1.1" mag=19.87+/-0.35
dist=141.3 REFID=115
src: 33 distr. of nearby unmatched sources: 0 0 0 0 0
Found 4 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
278.1605 34.4092 9.0 -1 USNO-B1 99.99 19.88 99.99
278.1581 34.4097 3.2 -1 USNO-B1 18.29 16.90 17.51 *
278.1542 34.4122 15.3 -1 USNO-B1 18.88 16.65 17.64
278.1534 34.4105 13.4 -1 USNO-B1 17.04 15.77 16.33
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 4" or brighter than 13 mag
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.66, BAT distances < 200",
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 1014012
------ Start for Possible Stand-alone Circular ----
In response to GRB201221 (Swift/BAT trigger 1014012) at 18:41:33 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 136 seconds after the BAT trigger. No credible afterglow candidate has
been found in the initial data products. Results from the 2.7'x2.7' sub-image
are not available at this time. The 8'x8' region for the list of sources
generated on-board covers 100% of the BAT 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 0.07.
------- notes for trigger 1014012 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 201221d18h57m35s090057usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1014012
-expid=630269056 -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/1014012/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
No XRT position found for srclist. BAT position found.
UVOT exposure began at MET 630269056.047 or about 2020:356:18:44:11 UT
Found 832 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 14% of the srclist region. Found 115 sources in
srclist catalog. Found 3 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.66 mag.
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?
630269056 136 WHITE srclist found no candidates.
630269056 136 WHITE image data are not available.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: 34.41100
GRB_ERROR: 200
GRB_RA: 278.20500
IMAGE_START_TIME: 18:44:11
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: BAT