image overlap message for exposure 1 of trigger 1013852
uvot_overlap.pl vrs. 2010-12-20b fem started at 201221d18h59m42s424861usUT
The observation of trigger 1013852 started 2020-12-21T07:11:49.0
Examining file ./1013852_g167_uvot_sky_image.fits
The exposure ID is 630227509
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (214.4865,-45.4108) 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 0.402 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 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 0.420 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 1 of trigger 1013852
find_uvot_ag.pl vrs. 2020-10-30 fem started at 201221d18h59m46s409033usUT
Observation start time is 2020-12-21T07:11:49.0
Examining file ./1013852_g167_uvot_catalog_image.fits
The exposure ID is 630227509
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 30 detected source(s) for 1013852_g167
Aspect correction adds 0.00114 degrees (0.273 sec of time = 2.88 arc sec) to RA
Aspect correction adds -0.00003 degrees (-0.11 arcsec) to Dec
Total aspect correction is 2.88 arcsec
Star catalogs centered at 214.4849 , -45.4123 with radius 2.71 arc min.
n_usno: 308 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 29 matched entries is 0.541" for 1013852_g167
Mean and std. dev of mag. difference (MAG_DELTA) are 1.195 and 0.337 for 1013852_g167
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1013852_g167.
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)
-----------------
Entry 23 in the list of sources is a candidate afterglow for 1013852_g167 with genie
ra=214.51081 (14:18:02.60) dec=-45.40980 (-45:24:35.3) +/- 0.6" mag=18.73+/-0.16
dist=80.8 REFID=18 major=1.0 minor=0.9 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 83.0 arc sec from the BAT position.
Found 7 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
214.5041 -45.4077 18.7 -1 USNO-B1 19.90 18.64 19.20
214.5073 -45.4126 13.6 -1 USNO-B1 20.49 19.04 19.68
214.5085 -45.4126 11.8 -1 USNO-B1 21.48 99.99 99.99
214.5111 -45.4092 2.3 -1 USNO-B1 16.14 15.93 16.02 *
214.5112 -45.4085 4.8 -1 USNO-B1 16.81 15.49 16.08
214.5095 -45.4047 18.7 -1 USNO-B1 17.78 16.37 17.00
214.5184 -45.4094 19.2 -1 USNO-B1 18.30 17.37 17.78
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 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 1.4329439E+05 counts in the bkg source region of 5497.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 26.068 counts/pixel (5-sig UL in 4" is 19.58 mag) for 1013852_g167
There are 5232.3003 counts in the xrt source region of 199.00000 pixels.
Rate in xrt region with 8 arcsec radius is 26.293 counts/pixel for 1013852_g167
There are 29797.170 counts in the xrt_bkg source region of 1156.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 25.776 counts/pixel (5-sig UL in 4" is 19.59 mag) for 1013852_g167
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 20.13, 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_630227509_201221d18h59m46s409033usUT_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(214.4865,-45.4108,45")
fk5;-circle(214.490185088003,-45.4128175118861,6")
fk5;-circle(214.492176301282,-45.4074739396407,6")
fk5;-circle(214.482513775196,-45.4007653714808,6")
fk5;-circle(214.493492413031,-45.4113052265014,6")
fk5;-circle(214.485813360844,-45.4012667795787,6")
fk5;-circle(214.485100357627,-45.421872639479,6")
fk5;-circle(214.498270515376,-45.4058808251529,6")
fk5;-circle(214.502506224499,-45.4057348190793,6")
Region file: 1013852_630227509_201221d18h59m46s409033usUT_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_630227509_201221d18h59m46s409033usUT_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(214.490185088003,-45.4128175118861,6")
fk5;-circle(214.485100357627,-45.421872639479,6")
fk5;-circle(214.478706961088,-45.4241999708559,6")
image paragraph message for exposure 1 of trigger 1013852
------ 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 150 seconds with the White filter
starting 141 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 201221d18h59m49s401404usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1013852
-expid=630227509 -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 630227509.03758 or about 2020:356:07:11:44 UT
Found 1675 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 31% of the srclist region. Found 177 sources in
srclist catalog. Found 22 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 30 source(s) in Genie image catalog. Found 1 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.13 mag. Found 304 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 143294.4 counts in the large background region of 5497.0 pixels or a rate
of 26.068 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 19.40 mag. for a
4-arcsec aperture.
Found 5232.3 counts in the XRT position region of 199.0 pixels or a rate of
26.293 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.686 +/- 0.521 (1-sigma) cps or
20.01 mag and a range from 19.40 to 21.56 mag. The 3-sigma UL at the XRT
position is 2.250 cps or 18.72 mag. The closest srclist source has ra= 214.4852
dec= -45.4222 mag=18.43 sep=25.16". The closest Genie source has ra= 214.4851
dec= -45.4219 mag=17.98 sep=23.95".
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?
630227509 141 WHITE srclist found no candidates.
630227509 141 WHITE image found no candidates.
List afterglow candidates for other finding charts.
630227667 299 U srclist found no candidates.
630227667 299 U 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: white
GRB_DEC: -45.41619
GRB_ERROR: 5
GRB_RA: 214.48017
IMAGE_START_TIME: 07:11:44
MAGNITUDE: 18.7
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT