image overlap message for exposure 2 of trigger 1033144
uvot_overlap.pl vrs. 2010-12-20b fem started at 210217d08h27m35s594266usUT
The observation of trigger 1033144 started 2021-02-17T08:16:36.9
Examining file 1033144_g314_uvot_sky_image.fits
The exposure ID is 635242596
The exposure time is 1.755 (seconds)
The filter is U.
The uvot region is centered at (277.6514,-6.7331) with a roll angle of 99.8
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 (277.6460,-6.7350) with a radius of 3.000 arc min
This is 0.339 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 (277.6728,-6.7544) with a radius of 0.070 arc min
This is 1.806 arc min from the center of the uvot region
The area of the XRT error circle is 0.015 sq. arc min
The UVOT/XRT overlap is 0.000 sq. arc min or 0.00 of the XRT error circle
image afterglow message for exposure 2 of trigger 1033144
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210217d08h27m37s098978usUT
Observation start time is 2021-02-17T08:16:36.9
Examining file 1033144_g314_uvot_sources_image.fits
The exposure ID is 635242596
The exposure is 1.755 sec.
The bin size is 2 pixels
The filter is U
There are 4 detected source(s) for 1033144_g314
*** WARNING -- Aspect solution FAILED.
Results need to be checked by, for example, blinking image with DS9.
Star catalogs centered at 277.6490 , -6.7255 with radius 2.21 arc min.
n_usno: 438 n_gsc: 0
*** WARNING -- XRT position is outside star catalog search region.
*** WARNING -- bright star catalog has 3 entries brighter than 12 mag
The brightest has mag 11.75
RA DEC Mag Color
bright star 0: 277.64114 (18:30:33.87) -6.72263 (-06:43:21.5) 12.00 USNO-R
bright star 1: 277.64008 (18:30:33.62) -6.72227 (-06:43:20.2) 11.80 USNO-R
bright star 2: 277.62251 (18:30:29.40) -6.73027 (-06:43:49.0) 11.75 USNO-R
Found 4 entries without IDs and 4 entries that are acceptable afterglow candidates for 1033144_g314.
Acceptable entries have no ID, XRT distances < 10.5", 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=277.6460 (18:30:35.04) DEC=-6.7350 (-06:44:06.0)
XRT distances are from RA=277.6728 (18:30:41.46) DEC=-6.7544 (-06:45:15.8)
*** WARNING 100 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1033144_g314 with genie
ra=277.65636 (18:30:37.53) dec=-6.74423 (-06:44:39.2) +/- 1.9" mag=16.95+/-0.58
dist=69.1 REFID=1 major=0.7 minor=0.7 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 49.8 arc sec from the BAT position.
Found 8 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
277.6532 -6.7404 18.0 -1 USNO-B1 19.61 15.82 17.51
277.6562 -6.7397 16.2 -1 USNO-B1 14.25 11.84 12.91 *
277.6561 -6.7414 10.1 -1 USNO-B1 18.55 99.99 99.99 *
277.6534 -6.7451 11.2 -1 USNO-B1 18.67 15.27 16.78 *
277.6598 -6.7435 12.5 -1 USNO-B1 19.62 15.79 17.49 *
277.6596 -6.7440 11.6 -1 USNO-B1 19.17 99.99 99.99 *
277.6560 -6.7477 12.5 -1 USNO-B1 18.60 15.95 17.13 *
277.6572 -6.7487 16.2 -1 USNO-B1 19.03 16.41 17.58
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 1 in the list of sources is a candidate afterglow for 1033144_g314 with genie
ra=277.65079 (18:30:36.19) dec=-6.70668 (-06:42:24.1) +/- 1.7" mag=16.83+/-0.55
dist=188.9 REFID=2 major=0.7 minor=0.5 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 103.4 arc sec from the BAT position.
This source is near the edge of image (0.891)
Found 7 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
277.6523 -6.7119 19.5 -1 USNO-B1 16.98 15.00 15.88 *
277.6528 -6.7113 18.2 -1 USNO-B1 99.99 17.83 99.99 *
277.6498 -6.7087 8.0 -1 USNO-B1 19.35 16.72 17.89 *
277.6510 -6.7083 5.8 -1 USNO-B1 15.73 13.58 14.54 *
277.6535 -6.7049 11.6 -1 USNO-B1 15.88 14.04 14.85 *
277.6508 -6.7033 12.1 -1 USNO-B1 19.26 15.84 17.36 *
277.6529 -6.7029 15.6 -1 USNO-B1 18.79 16.29 17.40 *
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 2 in the list of sources is a candidate afterglow for 1033144_g314 with genie
ra=277.65642 (18:30:37.54) dec=-6.73807 (-06:44:17.0) +/- 1.1" mag=15.70+/-0.32
dist=82.8 REFID=3 major=0.9 minor=0.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 38.8 arc sec from the BAT position.
Found 9 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
277.6552 -6.7336 16.8 -1 USNO-B1 17.55 15.73 16.54
277.6522 -6.7353 18.2 -1 USNO-B1 19.10 14.81 16.71
277.6596 -6.7356 14.3 -1 USNO-B1 99.99 19.26 99.99
277.6592 -6.7360 12.5 -1 USNO-B1 19.55 14.68 16.84 *
277.6596 -6.7366 12.4 -1 USNO-B1 17.61 15.10 16.21 *
277.6532 -6.7404 14.2 -1 USNO-B1 19.61 15.82 17.51
277.6562 -6.7397 6.1 -1 USNO-B1 14.25 11.84 12.91 *
277.6592 -6.7392 10.7 -1 USNO-B1 99.99 16.24 99.99 *
277.6561 -6.7414 12.2 -1 USNO-B1 18.55 99.99 99.99 *
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 3 in the list of sources is a candidate afterglow for 1033144_g314 with genie
ra=277.64168 (18:30:34.00) dec=-6.74317 (-06:44:35.4) +/- 1.0" mag=15.17+/-0.26
dist=118.2 REFID=4 major=0.9 minor=0.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 33.2 arc sec from the BAT position.
Found 10 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
277.6461 -6.7400 19.4 -1 USNO-B1 19.41 18.33 18.81
277.6462 -6.7415 17.2 -1 USNO-B1 18.69 15.16 16.72
277.6458 -6.7419 15.6 -1 USNO-B1 99.99 15.57 99.99
277.6452 -6.7425 12.9 -1 USNO-B1 99.99 14.33 99.99 *
277.6388 -6.7399 15.5 -1 USNO-B1 20.20 17.19 18.53
277.6450 -6.7427 12.0 -1 USNO-B1 18.03 14.46 16.04 *
277.6365 -6.7413 19.7 -1 USNO-B1 19.65 16.83 18.08
277.6414 -6.7444 4.6 -1 USNO-B1 15.18 14.03 14.54 *
277.6408 -6.7467 13.1 -1 USNO-B1 19.67 16.90 18.13 *
277.6366 -6.7452 19.7 -1 USNO-B1 19.74 16.79 18.10
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 13.5" or brighter than 12 mag
Found 4 entries in star catalog(s) within 20" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
277.6710 -6.7502 16.4 -1 USNO-B1 17.08 14.48 15.64
277.6694 -6.7519 14.9 -1 USNO-B1 99.99 17.14 99.99
277.6696 -6.7529 12.5 -1 USNO-B1 18.20 15.30 16.59
277.6715 -6.7516 11.0 -1 USNO-B1 19.07 16.75 17.78
The closest star is 11.03" away.
List UVOT sources within 20" of the XRT position:
There are 847.11719 counts in the bkg source region of 6127.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 0.138 counts/pixel (5-sig UL in 4" is 16.16 mag) for 1033144_g314
Do not compute counts in XRT region because position is too far from center.
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 16.71, XRT distances < 10.5",
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: 1033144_635242596_210217d08h27m37s098978usUT_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(277.6514,-6.7331,45")
fk5;-circle(277.656357818129,-6.74422971210119,6")
fk5;-circle(277.656415669597,-6.73806870899894,6")
fk5;-circle(277.64167955883,-6.74316641506698,6")
image paragraph message for exposure 2 of trigger 1033144
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.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
------ Start for Possible Stand-alone Circular ----
In response to GRB210217 (Swift/BAT trigger 1033144) at 08:11:21 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 2 seconds with the U filter starting
289 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
large, but uncertain, extinction expected.
------- notes for trigger 1033144 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210217d08h27m39s011730usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1033144
-expid=635242596 -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/1033144/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
Unreliable extinction found for bat position. Unreliable extinction found for
xrt position. XRT position found for Genie image. BAT position found.
UVOT exposure began at MET 635242596.85166 or about 2021:048:08:16:31 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 4 source(s) in Genie image catalog. Found 4 Genie image source(s) without
IDs. There are 0 good candidate(s) in the Genie image catalog. Good candidates
must be brighter than 16.71 mag. Found 434 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 61% of the
Genie image region. The XRT position was OUTSIDE the star catalog search
region. The closest Genie source has ra= 277.6564 dec= -6.7442 mag=16.95
sep=69.08".
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?
635242596 288 U srclist data are not available.
635242596 288 U image found no candidates.
List afterglow candidates for other finding charts.
635242384 76 WHITE srclist found no candidates.
635242384 76 WHITE image found no candidates.
------- Tokens for Quick GCN -------