image overlap message for exposure 2 of trigger 994725
uvot_overlap.pl vrs. 2010-12-20b fem started at 200905d09h59m48s481239usUT
The observation of trigger 994725 started 2020-09-05T09:49:35.7
Examining file 994725_g328_uvot_sky_image.fits
The exposure ID is 620992175
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (244.9691,-15.8739) with a roll angle of 279.0
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 (244.9680,-15.8610) with a radius of 3.000 arc min
This is 0.776 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 (244.9727,-15.8732) with a radius of 0.078 arc min
This is 0.213 arc min from the center of the uvot region
The area of the XRT error circle is 0.019 sq. arc min
The UVOT/XRT overlap is 0.019 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 994725
find_uvot_ag.pl vrs. 2017-02-17 fem started at 200905d09h59m50s779839usUT
Observation start time is 2020-09-05T09:49:35.7
Examining file 994725_g328_uvot_sources_image.fits
The exposure ID is 620992175
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 5 detected source(s) for 994725_g328
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 244.9646 , -15.8778 with radius 2.50 arc min.
n_usno: 149 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Found 5 entries without IDs and 5 entries that are acceptable afterglow candidates for 994725_g328.
Acceptable entries have no ID, XRT distances < 11.75", 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=244.9680 (16:19:52.32) DEC=-15.8610 (-15:51:39.6)
XRT distances are from RA=244.9727 (16:19:53.45) DEC=-15.8732 (-15:52:23.5)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 994725_g328 with genie
ra=244.94330 (16:19:46.39) dec=-15.87549 (-15:52:31.8) +/- 0.7" mag=14.03+/-0.14
dist=102.1 REFID=1 major=3.2 minor=1.8 flag=16 (aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 100.2 arc sec from the BAT position.
Found 2 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
244.9447 -15.8806 18.9 -1 USNO-B1 19.00 17.88 18.38
244.9444 -15.8808 19.5 -1 USNO-B1 20.22 18.24 19.12
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 3.2
-----------------
Entry 1 in the list of sources is a candidate afterglow for 994725_g328 with genie
ra=244.96481 (16:19:51.56) dec=-15.89221 (-15:53:32.0) +/- 0.7" mag=12.15+/-0.14
dist=73.7 REFID=2 major=2.6 minor=1.6 flag=18 (blended+aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 112.9 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
244.9646 -15.8934 4.1 -1 USNO-B1 20.32 17.87 18.96 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 13.5" or brighter than 12 mag
-----------------
Entry 2 in the list of sources is a candidate afterglow for 994725_g328 with genie
ra=244.98172 (16:19:55.61) dec=-15.86508 (-15:51:54.3) +/- 0.9" mag=19.28+/-0.23
dist=42.8 REFID=3 major=1.3 minor=1.0 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 49.7 arc sec from the BAT position.
Found 3 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
244.9819 -15.8694 15.6 -1 USNO-B1 16.80 15.74 16.21
244.9826 -15.8610 15.0 -1 USNO-B1 19.55 18.09 18.74
244.9874 -15.8659 19.8 -1 USNO-B1 20.02 19.05 19.48
*** If XRT position is correct, then this is NOT the afterglow
-----------------
Entry 3 in the list of sources is a candidate afterglow for 994725_g328 with genie
ra=244.98581 (16:19:56.59) dec=-15.86338 (-15:51:48.2) +/- 0.9" mag=19.32+/-0.23
dist=57.5 REFID=4 major=1.0 minor=0.7 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 62.2 arc sec from the BAT position.
Found 3 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
244.9826 -15.8610 13.8 -1 USNO-B1 19.55 18.09 18.74
244.9874 -15.8659 10.7 -1 USNO-B1 20.02 19.05 19.48 *
244.9876 -15.8659 11.1 -1 USNO-B1 19.98 18.92 19.39 *
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 13.5" or brighter than 12 mag
-----------------
Entry 4 in the list of sources is a candidate afterglow for 994725_g328 with genie
ra=244.96880 (16:19:52.51) dec=-15.88226 (-15:52:56.1) +/- 0.7" mag=15.05+/-0.14
dist=35.3 REFID=5 major=4.0 minor=1.1 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 76.6 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
244.9646 -15.8795 17.6 -1 USNO-B1 17.49 16.02 16.68
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 4.0
Found 0 entries in star catalog(s) within 20" of the XRT position.
List UVOT sources within 20" of the XRT position:
There are 53422.270 counts in the bkg source region of 6210.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 8.603 counts/pixel (5-sig UL in 4" is 19.30 mag) for 994725_g328
There are 1585.4023 counts in the xrt source region of 195.00000 pixels.
Rate in xrt region with 8 arcsec radius is 8.130 counts/pixel for 994725_g328
There are 10038.157 counts in the xrt_bkg source region of 1244.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 8.069 counts/pixel (5-sig UL in 4" is 19.33 mag) for 994725_g328
There are 1 candidate(s) outside XRT error circle with mag < 19.29
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.85, XRT distances < 11.75",
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: 994725_620992175_200905d09h59m50s779839usUT_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(244.9691,-15.8739,45")
fk5;-circle(244.968799089858,-15.8822593391411,6")
Region file: 994725_620992175_200905d09h59m50s779839usUT_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(244.9727,-15.8732,8")
Region file: 994725_620992175_200905d09h59m50s779839usUT_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(244.9727,-15.8732,25")
fk5;-circle(244.9727,-15.8732,15")
image paragraph message for exposure 2 of trigger 994725
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.
------ Start for Possible Stand-alone Circular ----
In response to GRB200905 (Swift/BAT trigger 994725) at 09:44:06 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
303 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 0.30.
------- notes for trigger 994725 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 200905d09h59m53s492041usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=994725
-expid=620992175 -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/994725/
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 620992175.66194 or about 2020:249:09:49:30 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 5 source(s) in Genie image catalog. Found 5 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 19.85 mag. Found 145 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 16% of the
Genie image region. The closest Genie source has ra= 244.9688 dec= -15.8823
mag=15.05 sep=35.30".
This paragraph is only useful if the XRT position is grossly wrong. There are 1
candidate(s) in the image data with mag < 19.29 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=244.98172
(16:19:55.61), DEC=-15.86508 (-15:51:54.3) (J2000). It has a mag of 19.28. It
is 49.7" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 250 seconds with the U filter starting
303 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 16:19:55.61 = 244.98172
DEC(J2000) = -15:51:54.3 = -15.86508
with a 90%-confidence error radius of about 0.92 arc sec. The estimated
magnitude is 19.28 with a 1-sigma error of about 0.23. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.30.
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?
620992175 303 U srclist data are not available.
620992175 303 U image found no candidates.
List afterglow candidates for other finding charts.
620992017 145 ? srclist data are not available.
620992017 145 WHITE 244.97223 -15.87492 16.98/20.0 6.4 image No
------- Tokens for Quick GCN -------