image overlap message for exposure 2 of trigger 1072990
uvot_overlap.pl vrs. 2010-12-20b fem started at 210912d20h50m06s697733usUT
The observation of trigger 1072990 started 2021-09-12T11:06:11.6
Examining file ./1072990_g299_uvot_sky_image.fits
The exposure ID is 653137571
The exposure time is 217.444 (seconds)
The filter is U.
The uvot region is centered at (129.9078,79.2199) with a roll angle of 138.0
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 (129.7690,79.1940) with a radius of 3.000 arc min
This is 2.199 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 5.62 sq. arc min or 0.20 of the BAT error circle
The XRT error circle is centered at (129.8899,79.2215) with a radius of 0.043 arc min
This is 0.222 arc min from the center of the uvot region
The area of the XRT error circle is 0.006 sq. arc min
The UVOT/XRT overlap is 0.006 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1072990
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210912d20h50m16s007733usUT
Observation start time is 2021-09-12T11:06:11.6
Examining file ./1072990_g299_uvot_sources_image.fits
The exposure ID is 653137571
The exposure is 217.444 sec.
The bin size is 2 pixels
The filter is U
There are 3 detected source(s) for 1072990_g299
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 129.8446 , 79.2157 with radius 2.00 arc min.
n_usno: 39 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Found 3 entries without IDs and 3 entries that are acceptable afterglow candidates for 1072990_g299.
Acceptable entries have no ID, XRT distances < 6.5", 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=129.7690 (08:39:04.56) DEC=79.1940 (+79:11:38.4)
XRT distances are from RA=129.8899 (08:39:33.58) DEC=79.2215 (+79:13:17.3)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1072990_g299 with genie
ra=129.80851 (08:39:14.04) dec=79.20909 (+79:12:32.7) +/- 0.8" mag=17.91+/-0.16
dist=70.7 REFID=1 major=1.1 minor=1.0 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 60.5 arc sec from the BAT position.
This source is near the edge of image (0.963)
Found 3 entries in star catalog(s) within 20.0" of the candidate.
printing all entries
(Entries within 12 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
129.8110 79.2082 3.5 -1 USNO-B1 18.09 17.03 17.50 *
129.8011 79.2103 6.7 -1 USNO-B1 16.82 15.87 16.29 *
129.8170 79.2043 18.2 -1 USNO-B1 99.99 19.53 99.99 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 20.25" or brighter than 12 mag
-----------------
Entry 1 in the list of sources is a candidate afterglow for 1072990_g299 with genie
ra=129.89030 (08:39:33.67) dec=79.22233 (+79:13:20.4) +/- 1.2" mag=19.86+/-0.34
dist=3.1 REFID=2 major=0.8 minor=0.7 flag=0
Found 0 entries in star catalog(s) within 20.0" of the candidate.
uvot_check_outside found 11 of 11 good pixels
##### This source remains a candidate #####
It has no entries within 13.5" or brighter than 12 mag
-----------------
Entry 2 in the list of sources is a candidate afterglow for 1072990_g299 with genie
ra=129.79894 (08:39:11.75) dec=79.21116 (+79:12:40.2) +/- 0.8" mag=16.94+/-0.15
dist=71.7 REFID=3 major=0.8 minor=0.7 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 65.0 arc sec from the BAT position.
This source is near the edge of image (1.019)
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
129.8110 79.2082 13.3 -1 USNO-B1 18.09 17.03 17.50 *
129.8011 79.2103 3.4 -1 USNO-B1 16.82 15.87 16.29 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 20.25" or brighter than 12 mag
Found 0 entries in star catalog(s) within 20" of the XRT position.
List UVOT sources within 20" of the XRT position:
Unmatched source ra=129.89030 (08:39:33.67) dec=79.22233 (+79:13:20.4) +/- 1.2" mag=19.86+/-0.34 dist=3.1 REFID=2 flag=0
There are 42954.863 counts in the bkg source region of 6199.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 6.929 counts/pixel (5-sig UL in 4" is 19.26 mag) for 1072990_g299
There are 1438.3351 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 7.156 counts/pixel for 1072990_g299
There are 8706.4863 counts in the xrt_bkg source region of 1247.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 6.982 counts/pixel (5-sig UL in 4" is 19.26 mag) for 1072990_g299
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 19.82, XRT distances < 6.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Results are questionable because aspect solution FAILED.
Region file: 1072990_653137571_210912d20h50m16s007733usUT_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(129.9078,79.2199,45")
fk5;-circle(129.890299040761,79.2223265493994,6")
Region file: 1072990_653137571_210912d20h50m16s007733usUT_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(129.88992,79.22147,8")
Region file: 1072990_653137571_210912d20h50m16s007733usUT_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(129.88992,79.22147,25")
fk5;-circle(129.88992,79.22147,15")
image paragraph message for exposure 2 of trigger 1072990
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: no aspect solution
SRCLIST PROBLEM: no srclist afterglow info
See notes for more details.
1 source(s) near the XRT position were rejected as afterglow candidate(s). See
notes for details.
------ Start for Possible Stand-alone Circular ----
In response to GRB210912 (Swift/BAT trigger 1072990) at 11:01:11 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 217 seconds with the U filter starting
272 seconds after the BAT trigger. No credible afterglow candidate has been
found in the initial data products. The 2.7'x2.7' sub-image processing FAILED
because of no aspect solution. Results from the list of sources generated
on-board are not available at this time. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.027.
------- notes for trigger 1072990 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210912d20h50m18s175085usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1072990
-expid=653137571 -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/1072990/
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 653137571.5786 or about 2021:255:11:06:06 UT
No information found about the number of stars in the star catalog for srclist
region.
THERE IS NO ASPECT SOLUTION for the image data.
Found 3 source(s) in Genie image catalog. 1 source(s) are within 20.0" of the
xrt position. Found 3 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
19.82 mag. Found 35 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 6% of the Genie image region.
Found 1 Genie source(s) within 20.0" of the XRT position. The brightest such
source has ra= 129.8903 dec= 79.2223 mag=19.86 sep=3.09". The closest Genie
source has ra= 129.8903 dec= 79.2223 mag=19.86 sep=3.09".
Report rejected UVOT sources within 10 arcsec XRT position.
Such sources are usually NOT the afterglow.
****THIS SOURCE NEAR XRT POSITION WAS REJECTED--USE WITH CAUTION****
UVOT took a finding chart exposure of 217 seconds with the U filter starting
272 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 08:39:33.67 = 129.89030
DEC(J2000) = +79:13:20.4 = 79.22233
with a 90%-confidence error radius of about 1.19 arc sec. This position is 3.09
arc sec. from the center of the XRT error circle. The estimated magnitude is
19.86 with a 1-sigma error of about 0.34. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.027.
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?
653137571 271 U srclist data are not available.
653137571 271 U 129.89030 79.22233 19.86/19.8 3.1 image No
List afterglow candidates for other finding charts.
653137359 59 ? srclist data are not available.
653137359 59 WHITE image found no candidates.
------- Tokens for Quick GCN -------