image overlap message for exposure 2 of trigger 1035994
uvot_overlap.pl vrs. 2010-12-20b fem started at 210308d16h09m44s526202usUT
The observation of trigger 1035994 started 2021-03-06T03:59:21.0
Examining file ./1035994_g323_uvot_sky_image.fits
The exposure ID is 636695961
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (129.9523,60.2058) with a roll angle of 317.0
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 (129.9638,60.2032) with a radius of 1.000 arc min
This is 0.376 arc min from the center of the uvot region
The area of the BAT error circle is 3.14 sq. arc min
The UVOT/BAT overlap is 3.14 sq. arc min or 1.00 of the BAT error circle
The XRT error circle is centered at (129.9578,60.2052) with a radius of 0.023 arc min
This is 0.166 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 1035994
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210308d16h09m56s537492usUT
Observation start time is 2021-03-06T03:59:21.0
Examining file ./1035994_g323_uvot_catalog_image.fits
The exposure ID is 636695961
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 4 detected source(s) for 1035994_g323
Aspect correction adds -0.00289 degrees (-0.694 sec of time = -5.18 arc sec) to RA
Aspect correction adds 0.00075 degrees ( 2.70 arcsec) to Dec
Total aspect correction is 5.84 arcsec
Star catalogs centered at 129.9601 , 60.2073 with radius 2.32 arc min.
n_usno: 58 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 3 matched entries is 0.196" for 1035994_g323
Mean and std. dev of mag. difference (MAG_DELTA) are 0.839 and 0.355 for 1035994_g323
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1035994_g323.
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=129.9638 (08:39:51.30) DEC=60.2032 (+60:12:11.5)
XRT distances are from RA=129.9578 (08:39:49.86) DEC=60.2052 (+60:12:18.8)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1035994_g323 with genie
ra=129.95838 (08:39:50.01) dec=60.20549 (+60:12:19.8) +/- 0.6" mag=16.77+/-0.14
dist=1.5 REFID=3 major=1.1 minor=1.0 flag=0
Found 2 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
129.9528 60.2038 11.7 -1 USNO-B1 19.02 18.52 18.74
129.9519 60.2027 15.3 -1 USNO-B1 18.53 18.22 18.36
uvot_check_outside found 11 of 11 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=129.95838 (08:39:50.01) dec=60.20549 (+60:12:19.8) +/- 0.6" mag=16.77+/-0.14 dist=1.5 REFID=3 flag=0
There are 11674.367 counts in the bkg source region of 6082.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 1.919 counts/pixel (5-sig UL in 4" is 20.11 mag) for 1035994_g323
There are 875.32068 counts in the src source region of 47.000000 pixels.
Rate in src region with 4 arcsec radius is 18.624 counts/pixel for 1035994_g323
There are 2400.2935 counts in the cand_src_bkg source region of 1224.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 1.961 counts/pixel (5-sig UL in 4" is 20.10 mag) for 1035994_g323
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 20.67, 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: 1035994_636695961_210308d16h09m56s537492usUT_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(129.9523,60.2058,45")
fk5;-circle(129.958380604007,60.2054944192411,6")
fk5;-circle(129.952970331507,60.2037271734431,6")
Region file: 1035994_636695961_210308d16h09m56s537492usUT_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(129.958380604007,60.2054944192411,4")
Region file: 1035994_636695961_210308d16h09m56s537492usUT_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(129.958380604007,60.2054944192411,25")
fk5;-circle(129.958380604007,60.2054944192411,15")
fk5;-circle(129.952970331507,60.2037271734431,6")
image paragraph message for exposure 2 of trigger 1035994
------ Start for Possible Stand-alone Circular ----
In response to GRB210306 (Swift/BAT trigger 1035994) at 03:53:57 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
297 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 08:39:50.01 = 129.95838
DEC(J2000) = +60:12:19.8 = 60.20549
with a 90%-confidence error radius of about 0.62 arc sec. This position is 1.5
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.77 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.052.
------- notes for trigger 1035994 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210308d16h09m59s978717usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1035994
-expid=636695961 -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/1035994/
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 636695961.01352 or about 2021:065:03:59:16 UT
Found 317 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 23 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
18.12 mag.
Found 4 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
20.67 mag. Found 54 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 6% 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?
636695961 297 U 129.95829 60.20543 17.39/18.1 1.2 srclist Yes
636695961 297 U 129.95838 60.20549 16.77/20.7 1.5 image Yes
List afterglow candidates for other finding charts.
636695748 84 WHITE 129.95827 60.20528 16.64/19.2 1.0 srclist Yes
636695748 84 WHITE 129.95813 60.20538 16.22/20.8 0.9 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 60.20549
GRB_ERROR: 0.62
GRB_RA: 129.95838
IMAGE_START_TIME: 03:59:16
MAGNITUDE: 16.77
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT