image overlap message for exposure 2 of trigger 1013852
uvot_overlap.pl vrs. 2010-12-20b fem started at 201221d18h59m42s977786usUT
The observation of trigger 1013852 started 2020-12-21T07:14:27.1
Examining file ./1013852_g325_uvot_sky_image.fits
The exposure ID is 630227667
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (214.4845,-45.4096) with a roll angle of 83.1
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 (214.4770,-45.4110) with a radius of 3.000 arc min
This is 0.328 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 (214.4802,-45.4162) with a radius of 0.025 arc min
This is 0.435 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
image afterglow message for exposure 2 of trigger 1013852
find_uvot_ag.pl vrs. 2020-10-30 fem started at 201221d18h59m54s469956usUT
Observation start time is 2020-12-21T07:14:27.1
Examining file ./1013852_g325_uvot_catalog_image.fits
The exposure ID is 630227667
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 19 detected source(s) for 1013852_g325
Aspect correction adds 0.00103 degrees (0.246 sec of time = 2.59 arc sec) to RA
Aspect correction adds -0.00036 degrees (-1.28 arcsec) to Dec
Total aspect correction is 2.89 arcsec
Star catalogs centered at 214.4832 , -45.4066 with radius 2.59 arc min.
n_usno: 270 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 19 matched entries is 0.556" for 1013852_g325
Mean and std. dev of mag. difference (MAG_DELTA) are 1.581 and 0.743 for 1013852_g325
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1013852_g325.
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=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)
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 62001.137 counts in the bkg source region of 5756.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 10.772 counts/pixel (5-sig UL in 4" is 19.17 mag) for 1013852_g325
There are 2141.1172 counts in the xrt source region of 198.00000 pixels.
Rate in xrt region with 8 arcsec radius is 10.814 counts/pixel for 1013852_g325
There are 12167.188 counts in the xrt_bkg source region of 1145.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 10.626 counts/pixel (5-sig UL in 4" is 19.18 mag) for 1013852_g325
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 19.73, 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: 1013852_630227667_201221d18h59m54s469956usUT_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(214.4845,-45.4096,45")
fk5;-circle(214.490175373666,-45.4129021142434,6")
fk5;-circle(214.492390747579,-45.4077089853867,6")
fk5;-circle(214.482668467624,-45.4007115326858,6")
fk5;-circle(214.469592834757,-45.4014488779671,6")
fk5;-circle(214.485161900624,-45.4217993944093,6")
fk5;-circle(214.498353523766,-45.4059252856932,6")
fk5;-circle(214.502597037194,-45.4059156425869,6")
Region file: 1013852_630227667_201221d18h59m54s469956usUT_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(214.48017,-45.41619,8")
Region file: 1013852_630227667_201221d18h59m54s469956usUT_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(214.48017,-45.41619,25")
fk5;-circle(214.48017,-45.41619,15")
fk5;-circle(214.490175373666,-45.4129021142434,6")
fk5;-circle(214.485161900624,-45.4217993944093,6")
fk5;-circle(214.478741885936,-45.4242595187213,6")
image paragraph message for exposure 2 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 250 seconds with the U filter starting
299 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
0.11.
------- notes for trigger 1013852 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 201221d18h59m57s441242usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1013852
-expid=630227667 -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/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 630227667.0731 or about 2020:356:07:14:22 UT
Found 3674 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 48 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 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 19.73 mag. Found 266 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
27% of the Genie image region.
Genie image analysis:
Found 62001.1 counts in the large background region of 5756.0 pixels or a rate
of 10.772 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 19.03 mag. for a
4-arcsec aperture.
Found 2141.1 counts in the XRT position region of 198.0 pixels or a rate of
10.814 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.148 +/- 0.200 (1-sigma) cps or
20.27 mag and a range from 19.34 to 99.99 mag. The 3-sigma UL at the XRT
position is 0.749 cps or 18.51 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.23 mag. The closest
srclist source has ra= 214.4904 dec= -45.4128 mag=17.89 sep=28.39". The closest
Genie source has ra= 214.4852 dec= -45.4218 mag=19.39 sep=23.81".
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?
630227667 299 U srclist found no candidates.
630227667 299 U 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.
630228247 879 WHITE srclist found no candidates.
630228247 879 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -45.41619
GRB_ERROR: 5
GRB_RA: 214.48017
IMAGE_START_TIME: 07:14:22
MAGNITUDE: 18.5
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT