image overlap message for exposure 1 of trigger 1016881
uvot_overlap.pl vrs. 2010-12-20b fem started at 210112d04h19m00s837340usUT
The observation of trigger 1016881 started 2021-01-12T01:38:53.0
Examining file ./1016881_g109_uvot_sky_image.fits
The exposure ID is 632108333
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (219.0104,33.0524) 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 1.199 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 0.241 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 1 of trigger 1016881
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210112d04h19m04s559931usUT
Observation start time is 2021-01-12T01:38:53.0
Examining file ./1016881_g109_uvot_catalog_image.fits
The exposure ID is 632108333
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 5 detected source(s) for 1016881_g109
Aspect correction adds 0.00090 degrees (0.216 sec of time = 2.71 arc sec) to RA
Aspect correction adds 0.00002 degrees ( 0.08 arcsec) to Dec
Total aspect correction is 2.71 arcsec
Star catalogs centered at 219.0140 , 33.0535 with radius 2.68 arc min.
n_usno: 96 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 4 matched entries is 0.537" for 1016881_g109
Mean and std. dev of mag. difference (MAG_DELTA) are 0.870 and 0.196 for 1016881_g109
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1016881_g109.
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)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1016881_g109 with genie
ra=219.00606 (14:36:01.45) dec=33.05428 (+33:03:15.4) +/- 0.7" mag=19.52+/-0.16
dist=0.4 REFID=3 major=1.0 minor=0.9 flag=0
Found 1 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
219.0064 33.0598 20.0 -1 USNO-B1 18.34 18.52 18.44
uvot_check_outside found 14 of 14 good pixels
##### This source remains a candidate #####
It has no entries within 3.5" or brighter than 12 mag
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=219.00606 (14:36:01.45) dec=33.05428 (+33:03:15.4) +/- 0.7" mag=19.52+/-0.16 dist=0.4 REFID=3 flag=0
There are 44984.578 counts in the bkg source region of 5990.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 7.510 counts/pixel (5-sig UL in 4" is 20.26 mag) for 1016881_g109
There are 604.54974 counts in the src source region of 50.000000 pixels.
Rate in src region with 4 arcsec radius is 12.091 counts/pixel for 1016881_g109
There are 8397.0908 counts in the cand_src_bkg source region of 1142.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 7.353 counts/pixel (5-sig UL in 4" is 20.27 mag) for 1016881_g109
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 20.81, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
Region file: 1016881_632108333_210112d04h19m04s559931usUT_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(219.0104,33.0524,45")
fk5;-circle(219.006058205456,33.0542753825851,6")
fk5;-circle(219.006466307287,33.0597030906278,6")
fk5;-circle(219.022307359261,33.0477998030166,6")
Region file: 1016881_632108333_210112d04h19m04s559931usUT_cand_src.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(219.006058205456,33.0542753825851,4")
Region file: 1016881_632108333_210112d04h19m04s559931usUT_cand_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(219.006058205456,33.0542753825851,25")
fk5;-circle(219.006058205456,33.0542753825851,15")
fk5;-circle(219.006466307287,33.0597030906278,6")
image paragraph message for exposure 1 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 82 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 14:36:01.45 = 219.00606
DEC(J2000) = +33:03:15.4 = 33.05428
with a 90%-confidence error radius of about 0.66 arc sec. This position is 0.4
arc sec. from the center of the XRT error circle. The estimated magnitude is
19.52 with a 1-sigma error of about 0.16. 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 210112d04h19m07s958251usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1016881
-expid=632108333 -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 632108333.03072 or about 2021:012:01:38:48 UT
Found 305 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 7% of the srclist region. Found 24 sources in
srclist catalog. Found 4 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 5 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 1 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.81 mag. Found 92 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 8% of the Genie image region.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 219.0064 dec= 33.0542 mag=19.77 sep=1.03".
The closest srclist source has ra= 219.0064 dec= 33.0542 mag=19.77 sep=1.03".
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?
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
List afterglow candidates for other finding charts.
632108545 294 U srclist found no candidates.
632108545 294 U image found no candidates.
632109122 871 WHITE srclist found no candidates.
632109122 871 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 33.05428
GRB_ERROR: 0.66
GRB_RA: 219.00606
IMAGE_START_TIME: 01:38:48
MAGNITUDE: 19.52
MAG_ERROR: 0.16
MESSAGE_TYPE: ACK
SOURCE: XRT