image overlap message for exposure 2 of trigger 999571
uvot_overlap.pl vrs. 2010-12-20b fem started at 201010d21h01m53s158959usUT
The observation of trigger 999571 started 2020-10-10T14:54:34.2
Examining file ./999571_g310_uvot_sky_image.fits
The exposure ID is 624034474
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (277.6710,-6.7617) with a roll angle of 264.0
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 (277.6750,-6.7580) with a radius of 3.000 arc min
This is 0.329 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 (277.6738,-6.7546) with a radius of 0.023 arc min
This is 0.463 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 999571
find_uvot_ag.pl vrs. 2017-02-17 fem started at 201010d21h02m13s910623usUT
Observation start time is 2020-10-10T14:54:34.2
Examining file ./999571_g310_uvot_catalog_image.fits
The exposure ID is 624034474
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 27 detected source(s) for 999571_g310
Aspect correction adds -0.00100 degrees (-0.240 sec of time = -3.58 arc sec) to RA
Aspect correction adds -0.00077 degrees (-2.78 arcsec) to Dec
Total aspect correction is 4.53 arcsec
Star catalogs centered at 277.6699 , -6.7622 with radius 2.68 arc min.
n_usno: 618 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 27 matched entries is 0.973" for 999571_g310
Mean and std. dev of mag. difference (MAG_DELTA) are 2.708 and 0.907 for 999571_g310
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 999571_g310.
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=277.6750 (18:30:42.00) DEC=-6.7580 (-06:45:28.8)
XRT distances are from RA=277.6738 (18:30:41.72) DEC=-6.7546 (-06:45:16.4)
-----------------
Entry 2 in the list of sources is a candidate afterglow for 999571_g310 with genie
ra=277.67394 (18:30:41.75) dec=-6.75326 (-06:45:11.7) +/- 0.6" mag=16.59+/-0.14
dist=4.7 REFID=12 major=1.1 minor=1.0 flag=0
Found 8 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
277.6734 -6.7575 15.3 -1 USNO-B1 16.32 14.69 15.41
277.6770 -6.7571 17.6 -1 USNO-B1 19.23 16.98 17.98
277.6734 -6.7536 2.2 -1 USNO-B1 15.05 13.09 13.96 *
277.6696 -6.7529 15.5 -1 USNO-B1 18.20 15.30 16.59
277.6694 -6.7519 16.8 -1 USNO-B1 99.99 17.14 99.99
277.6715 -6.7516 10.5 -1 USNO-B1 19.07 16.75 17.78
277.6710 -6.7502 15.3 -1 USNO-B1 17.08 14.48 15.64
277.6769 -6.7520 11.5 -1 USNO-B1 19.09 16.06 17.41
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 3.5" or brighter than 12 mag
-----------------
Entry 23 in the list of sources is a candidate afterglow for 999571_g310 with genie
ra=277.65706 (18:30:37.69) dec=-6.74002 (-06:44:24.1) +/- 1.0" mag=19.97+/-0.28
dist=79.6 REFID=3 major=0.5 minor=0.2 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 93.7 arc sec from the BAT position.
This source is near the edge of image (0.953)
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
277.6596 -6.7440 17.0 -1 USNO-B1 19.17 99.99 99.99
277.6598 -6.7435 15.7 -1 USNO-B1 19.62 15.79 17.49
277.6561 -6.7414 6.1 -1 USNO-B1 18.55 99.99 99.99
277.6592 -6.7392 8.2 -1 USNO-B1 99.99 16.24 99.99
277.6562 -6.7397 3.2 -1 USNO-B1 14.25 11.84 12.91 *
277.6532 -6.7404 13.9 -1 USNO-B1 19.61 15.82 17.51
277.6596 -6.7366 15.2 -1 USNO-B1 17.61 15.10 16.21
277.6592 -6.7360 16.5 -1 USNO-B1 19.55 14.68 16.84
277.6596 -6.7356 18.2 -1 USNO-B1 99.99 19.26 99.99
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" or brighter than 12 mag
Found 1 entries in star catalog(s) within 10" of the XRT position.
RA Dec Sep. Match USNO/ USNO-B USNO-R USNO-V
GSC GSC-F GSC-J GSC-V
277.6734 -6.7536 3.7 -1 USNO-B1 15.05 13.09 13.96
The closest star is 3.73" away.
List UVOT sources within 10" of the XRT position:
Unmatched source ra=277.67394 (18:30:41.75) dec=-6.75326 (-06:45:11.7) +/- 0.6" mag=16.59+/-0.14 dist=4.7 REFID=12 flag=0
There are 22488.623 counts in the bkg source region of 5453.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 4.124 counts/pixel (5-sig UL in 4" is 19.70 mag) for 999571_g310
There are 1750.2417 counts in the xrt source region of 200.00000 pixels.
Rate in xrt region with 8 arcsec radius is 8.751 counts/pixel for 999571_g310
There are 4330.8916 counts in the xrt_bkg source region of 1062.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 4.078 counts/pixel (5-sig UL in 4" is 19.70 mag) for 999571_g310
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 20.25, XRT distances < 5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 999571_624034474_201010d21h02m13s910623usUT_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(277.6710,-6.7617,45")
fk5;-circle(277.673475360808,-6.75766079901416,6")
fk5;-circle(277.672425848037,-6.76370647584798,6")
fk5;-circle(277.673940107921,-6.753256396096,6")
fk5;-circle(277.668520971145,-6.75882205650831,6")
fk5;-circle(277.671005490809,-6.74990315418315,6")
fk5;-circle(277.667897366426,-6.76696003795253,6")
fk5;-circle(277.66169904735,-6.76184229301005,6")
fk5;-circle(277.66274689106,-6.76979479844563,6")
Region file: 999571_624034474_201010d21h02m13s910623usUT_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(277.67383,-6.75456,8")
Region file: 999571_624034474_201010d21h02m13s910623usUT_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(277.67383,-6.75456,25")
fk5;-circle(277.67383,-6.75456,15")
fk5;-circle(277.673475360808,-6.75766079901416,6")
fk5;-circle(277.668520971145,-6.75882205650831,6")
fk5;-circle(277.671005490809,-6.74990315418315,6")
image paragraph message for exposure 2 of trigger 999571
THIS MESSAGE IS *NOT* READY FOR DISTRIBUTION.
MORE ANALYSIS IS REQUIRED TO DETERMINE WHETHER THERE IS AN AFTERGLOW CANDIDATE.
IMAGE PROBLEM: high density of stars
SRCLIST PROBLEM: high density of stars, srclist filled telemetry buffer
See notes for more details.
WARNING -- because of the LARGE EXTINCTION, results should be used cautiously.
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 GRB201010 (Swift/BAT trigger 999571) at 14:49:23 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
284 seconds after the BAT trigger. No credible afterglow candidate has been
found in the initial data products. The 2.7'x2.7' sub-image covers 100% of the
XRT error circle. Because of the density of catalogued stars, further analysis
is required to report an upper limit for any afterglow in the sub-image. The
8'x8' region for the list of sources generated on-board covers 100% of the XRT
error circle. Because of the density of catalogued stars, further analysis is
required to report an upper limit for any afterglow in the region. No
correction has been made for the large, but uncertain, extinction expected.
------- notes for trigger 999571 ------
uvot_gcn_auto.pl vrs. 2016-09-07 fem at 201010d21h02m21s281123usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=999571
-expid=624034474 -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/999571/
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 srclist. XRT position found for Genie
image. BAT position found.
UVOT exposure began at MET 624034474.17052 or about 2020:284:14:54:29 UT
Found 5000 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 49% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 31 srclist
source(s) without IDs. There are 0 good candidate(s) in the srclist catalog.
Good candidates must be brighter than 18.12 mag.
Found 27 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 2 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.25 mag. Found 614 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 59% of the Genie image region.
Genie image analysis:
Found 22488.6 counts in the large background region of 5453.0 pixels or a rate
of 4.124 counts/pixel in a radius of 45.0 arcsec. Based on this background, the
typical 5-sigma UL at a random point in the Genie image is 19.74 mag. for a
4-arcsec aperture.
Found 1750.2 counts in the XRT position region of 200.0 pixels or a rate of
8.751 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 3.738 +/- 0.175 (1-sigma) cps or
16.95 mag and a range from 16.90 to 17.00 mag. The 3-sigma UL at the XRT
position is 4.262 cps or 16.81 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.41 mag.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 277.6737 dec= -6.7530 mag=17.60 sep=5.46".
The closest srclist source has ra= 277.6737 dec= -6.7530 mag=17.60 sep=5.46".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 277.6739 dec= -6.7533 mag=16.59 sep=4.71". The closest Genie
source has ra= 277.6739 dec= -6.7533 mag=16.59 sep=4.71".
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 250 seconds with the U filter starting
284 seconds after the BAT trigger. There is a candidate afterglow in the
rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 18:30:41.75 = 277.67394
DEC(J2000) = -06:45:11.7 = -6.75326
with a 90%-confidence error radius of about 0.62 arc sec. This position is 4.71
arc sec. from the center of the XRT error circle. The estimated magnitude is
16.59 with a 1-sigma error of about 0.14. No correction has been made for the
large, but uncertain, extinction expected.
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?
624034474 284 U srclist found no candidates.
624034474 284 U image found no candidates.
List afterglow candidates for other finding charts.
624034261 71 WHITE srclist found no candidates.
624034261 71 WHITE image found no candidates.
------- Tokens for Quick GCN -------