image overlap message for exposure 2 of trigger 1058804
uvot_overlap.pl vrs. 2010-12-20b fem started at 210703d08h53m38s514840usUT
The observation of trigger 1058804 started 2021-07-02T19:12:56.7
Examining file ./1058804_g342_uvot_sky_image.fits
The exposure ID is 646945976
The exposure time is 44.922 (seconds)
The filter is U.
The uvot region is centered at (168.5744,-36.7463) with a roll angle of 302.2
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 (168.5700,-36.7410) with a radius of 3.000 arc min
This is 0.381 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 (168.5788,-36.7471) with a radius of 0.032 arc min
This is 0.218 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 2 of trigger 1058804
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210703d08h53m51s703123usUT
Observation start time is 2021-07-02T19:12:56.7
Examining file ./1058804_g342_uvot_catalog_image.fits
The exposure ID is 646945976
The exposure is 44.922 sec.
The bin size is 2 pixels
The filter is U
There are 13 detected source(s) for 1058804_g342
Aspect correction adds -0.00106 degrees (-0.254 sec of time = -3.05 arc sec) to RA
Aspect correction adds 0.00007 degrees ( 0.25 arcsec) to Dec
Total aspect correction is 3.06 arcsec
Star catalogs centered at 168.5791 , -36.7509 with radius 2.37 arc min.
n_usno: 75 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.40866
RA DEC Mag Color
bright star 0: 168.58012 (11:14:19.23) -36.76796 (-36:46:04.6) 11.41 USNO-V
Mean distance difference (CAT_DELTA) for 7 matched entries is 0.240" for 1058804_g342
Mean and std. dev of mag. difference (MAG_DELTA) are 1.748 and 0.492 for 1058804_g342
Found 6 entries without IDs and 6 entries that are acceptable afterglow candidates for 1058804_g342.
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.
0 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=168.5700 (11:14:16.80) DEC=-36.7410 (-36:44:27.6)
XRT distances are from RA=168.5788 (11:14:18.91) DEC=-36.7471 (-36:44:49.7)
*** WARNING 46 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1058804_g342 with genie
ra=168.58284 (11:14:19.88) dec=-36.74654 (-36:44:47.5) +/- 0.6" mag=14.93+/-0.14
dist=11.9 REFID=5 major=6.1 minor=3.8 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 42.1 arc sec from the BAT position.
Found 0 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)
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 6.1
-----------------
Entry 1 in the list of sources is a candidate afterglow for 1058804_g342 with genie
ra=168.57846 (11:14:18.83) dec=-36.74690 (-36:44:48.8) +/- 0.6" mag=11.72+/-0.14
dist=1.3 REFID=9 major=0.9 minor=0.6 flag=0
Found 0 entries in star catalog(s) within 20.0" of the candidate.
uvot_check_outside found 13 of 13 good pixels
##### This source remains a candidate #####
It has no entries within 3.5" or brighter than 12 mag
-----------------
Entry 2 in the list of sources is a candidate afterglow for 1058804_g342 with genie
ra=168.57926 (11:14:19.02) dec=-36.74360 (-36:44:37.0) +/- 0.6" mag=16.09+/-0.15
dist=12.8 REFID=4 major=5.6 minor=3.8 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 28.3 arc sec from the BAT position.
Found 0 entries in star catalog(s) within 20.0" of the candidate.
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 5.6
-----------------
Entry 3 in the list of sources is a candidate afterglow for 1058804_g342 with genie
ra=168.57724 (11:14:18.54) dec=-36.75057 (-36:45:02.1) +/- 0.6" mag=15.26+/-0.15
dist=13.1 REFID=6 major=6.4 minor=3.9 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 40.3 arc sec from the BAT position.
Found 1 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
168.5803 -36.7530 12.5 -1 USNO-B1 19.28 17.60 18.35
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 6.4
-----------------
Entry 4 in the list of sources is a candidate afterglow for 1058804_g342 with genie
ra=168.57684 (11:14:18.44) dec=-36.74331 (-36:44:35.9) +/- 0.7" mag=16.69+/-0.16
dist=14.9 REFID=3 major=4.5 minor=2.8 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 21.4 arc sec from the BAT position.
Found 1 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
168.5711 -36.7414 17.9 -1 USNO-B1 19.66 18.75 19.15
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 4.5
-----------------
Entry 5 in the list of sources is a candidate afterglow for 1058804_g342 with genie
ra=168.57353 (11:14:17.65) dec=-36.74656 (-36:44:47.6) +/- 0.6" mag=16.06+/-0.15
dist=15.3 REFID=7 major=5.9 minor=3.2 flag=1 (neighbor)
*** The position of this source is inconsistent with the XRT position.
The position is 22.5 arc sec from the BAT position.
Found 2 entries in star catalog(s) within 20.0" of the candidate.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
168.5711 -36.7476 8.1 -1 USNO-B1 18.85 17.00 17.82
168.5711 -36.7414 19.9 -1 USNO-B1 19.66 18.75 19.15
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 5.9
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=168.57846 (11:14:18.83) dec=-36.74690 (-36:44:48.8) +/- 0.6" mag=11.72+/-0.14 dist=1.3 REFID=9 flag=0
There are 3922.0935 counts in the bkg source region of 5653.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 0.694 counts/pixel (5-sig UL in 4" is 18.80 mag) for 1058804_g342
There are 4004.9463 counts in the src source region of 49.000000 pixels.
Rate in src region with 4 arcsec radius is 81.734 counts/pixel for 1058804_g342
There are 1361.0968 counts in the cand_src_bkg source region of 1052.0000 pixels.
Rate in cand_src_bkg region from 15 to 25 arcsec is 1.294 counts/pixel (5-sig UL in 4" is 18.46 mag) for 1058804_g342
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 19.35, 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: 1058804_646945976_210703d08h53m51s703123usUT_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(168.5744,-36.7463,45")
fk5;-circle(168.582841149407,-36.7465393634238,6")
fk5;-circle(168.578460468788,-36.746897984707,6")
fk5;-circle(168.57926011093,-36.7436001310402,6")
fk5;-circle(168.577236041103,-36.7505717448728,6")
fk5;-circle(168.576841576153,-36.7433132002111,6")
fk5;-circle(168.573528750632,-36.7465635531032,6")
fk5;-circle(168.591131624387,-36.7496232553126,6")
fk5;-circle(168.576380681395,-36.7601704552015,6")
Region file: 1058804_646945976_210703d08h53m51s703123usUT_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(168.578460468788,-36.746897984707,4")
Region file: 1058804_646945976_210703d08h53m51s703123usUT_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(168.578460468788,-36.746897984707,25")
fk5;-circle(168.578460468788,-36.746897984707,15")
fk5;-circle(168.582841149407,-36.7465393634238,6")
fk5;-circle(168.57926011093,-36.7436001310402,6")
fk5;-circle(168.577236041103,-36.7505717448728,6")
fk5;-circle(168.576841576153,-36.7433132002111,6")
fk5;-circle(168.573528750632,-36.7465635531032,6")
image paragraph message for exposure 2 of trigger 1058804
------ Start for Possible Stand-alone Circular ----
In response to GRB210702 (Swift/BAT trigger 1058804) at 19:07:13 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 45 seconds with the U filter starting
315 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 11:14:18.83 = 168.57846
DEC(J2000) = -36:44:48.8 = -36.74690
with a 90%-confidence error radius of about 0.61 arc sec. This position is 1.3
arc sec. from the center of the XRT error circle. The estimated magnitude is
11.72 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.121.
------- notes for trigger 1058804 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210703d08h53m57s259868usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1058804
-expid=646945976 -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/1058804/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 646945976.66936 or about 2021:183:19:12:51 UT
No information found about the number of stars in the star catalog for srclist
region.
Found 13 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 6 Genie image source(s) without IDs. There are 1 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
19.35 mag. Found 71 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 8% 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?
646945976 315 U srclist data are not available.
646945976 315 U 168.57846 -36.74690 11.72/19.4 1.3 image Yes
List afterglow candidates for other finding charts.
646945764 103 WHITE 168.57793 -36.74729 15.66/19.2 2.6 srclist Yes
646945764 103 WHITE 168.57937 -36.74655 15.94/19.2 2.7 srclist Yes
646945764 103 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: -36.74690
GRB_ERROR: 0.61
GRB_RA: 168.57846
IMAGE_START_TIME: 19:12:51
MAGNITUDE: 11.72
MAG_ERROR: 0.14
MESSAGE_TYPE: ACK
SOURCE: XRT