image overlap message for exposure 1 of trigger 1036227
uvot_overlap.pl vrs. 2010-12-20b fem started at 210308d12h50m12s701415usUT
The observation of trigger 1036227 started 2021-03-08T06:39:58.0
Examining file ./1036227_g121_uvot_sky_image.fits
The exposure ID is 636878398
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (67.0686,37.4287) with a roll angle of 259.0
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 (67.0880,37.4110) with a radius of 3.000 arc min
This is 1.406 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 7.09 sq. arc min or 0.25 of the BAT error circle
The XRT error circle is centered at (67.0746,37.4341) with a radius of 0.037 arc min
This is 0.430 arc min from the center of the uvot region
The area of the XRT error circle is 0.004 sq. arc min
The UVOT/XRT overlap is 0.004 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 1 of trigger 1036227
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210308d12h50m08s221306usUT
Observation start time is 2021-03-08T06:39:58.0
Examining file ./1036227_g121_uvot_catalog_image.fits
The exposure ID is 636878398
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 9 detected source(s) for 1036227_g121
Aspect correction adds -0.00095 degrees (-0.229 sec of time = -2.73 arc sec) to RA
Aspect correction adds -0.00104 degrees (-3.73 arcsec) to Dec
Total aspect correction is 4.62 arcsec
Star catalogs centered at 67.0675 , 37.4309 with radius 2.64 arc min.
n_usno: 110 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 8 matched entries is 0.384" for 1036227_g121
Mean and std. dev of mag. difference (MAG_DELTA) are 1.039 and 0.365 for 1036227_g121
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1036227_g121.
Acceptable entries have no ID, XRT distances < 15", 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=67.0880 (04:28:21.12) DEC=37.4110 (+37:24:39.6)
XRT distances are from RA=67.0767 (04:28:18.41) DEC=37.4346 (+37:26:04.6)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1036227_g121 with genie
ra=67.07388 (04:28:17.73) dec=37.43388 (+37:26:02.0) +/- 0.6" mag=18.57+/-0.15
dist=8.5 REFID=4 major=1.0 minor=0.9 flag=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
67.0682 37.4331 16.4 -1 USNO-B1 99.99 19.66 99.99
67.0731 37.4312 9.9 -1 USNO-B1 99.99 19.77 99.99
67.0680 37.4354 17.7 -1 USNO-B1 99.99 20.14 99.99
67.0680 37.4357 18.0 -1 USNO-B1 99.99 19.66 99.99
67.0794 37.4311 18.7 -1 USNO-B1 19.97 18.18 18.98
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=67.07388 (04:28:17.73) dec=37.43388 (+37:26:02.0) +/- 0.6" mag=18.57+/-0.15 dist=8.5 REFID=4 flag=0
There are 92104.078 counts in the bkg source region of 6093.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 15.116 counts/pixel (5-sig UL in 4" is 19.88 mag) for 1036227_g121
There are 1247.6499 counts in the src source region of 50.000000 pixels.
Rate in src region with 4 arcsec radius is 24.953 counts/pixel for 1036227_g121
There are 18825.508 counts in the cand_src_bkg source region of 1244.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 15.133 counts/pixel (5-sig UL in 4" is 19.87 mag) for 1036227_g121
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 20.43, XRT distances < 15",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 1 good candidate(s) found.
Region file: 1036227_636878398_210308d12h50m08s221306usUT_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(67.0686,37.4287,45")
fk5;-circle(67.0738805064258,37.4338773099888,6")
fk5;-circle(67.0674890996053,37.4249717781432,6")
Region file: 1036227_636878398_210308d12h50m08s221306usUT_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(67.0738805064258,37.4338773099888,4")
Region file: 1036227_636878398_210308d12h50m08s221306usUT_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(67.0738805064258,37.4338773099888,25")
fk5;-circle(67.0738805064258,37.4338773099888,15")
image paragraph message for exposure 1 of trigger 1036227
------ Start for Possible Stand-alone Circular ----
In response to GRB210308 (Swift/BAT trigger 1036227) at 06:37:56 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 94 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 04:28:17.73 = 67.07388
DEC(J2000) = +37:26:02.0 = 37.43388
with a 90%-confidence error radius of about 0.63 arc sec. This position is 8.5
arc sec. from the center of the XRT error circle. The estimated magnitude is
18.57 with a 1-sigma error of about 0.15. No correction has been made for the
expected extinction corresponding to E(B-V) of 1.296.
------- notes for trigger 1036227 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210308d12h50m27s963984usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1036227
-expid=636878398 -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/1036227/
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 636878398.04814 or about 2021:067:06:39:53 UT
Found 762 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 11% of the srclist region. Found 54 sources in
srclist catalog. Found 2 srclist source(s) without IDs. There are 1 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
Found 9 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
20.43 mag. Found 106 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 10% of the Genie image region.
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?
636878398 94 WHITE 67.07372 37.43386 18.95/19.2 2.6 srclist Yes
636878398 94 WHITE 67.07388 37.43388 18.57/20.4 8.5 image Yes
List afterglow candidates for other finding charts.
636878610 306 ? srclist data are not available.
636878610 306 U image found no candidates.
636879163 859 WHITE srclist found no candidates.
636879163 859 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 37.43388
GRB_ERROR: 0.63
GRB_RA: 67.07388
IMAGE_START_TIME: 06:39:53
MAGNITUDE: 18.57
MAG_ERROR: 0.15
MESSAGE_TYPE: ACK
SOURCE: XRT