image overlap message for exposure 1 of trigger 1061482
uvot_overlap.pl vrs. 2010-12-20b fem started at 210729d15h26m54s782755usUT
The observation of trigger 1061482 started 2021-07-24T20:16:41.4
Examining file ./1061482_g151_uvot_sky_image.fits
The exposure ID is 648850601
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (227.4016,-6.2717) with a roll angle of 288.7
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 (227.4246,-6.2786) with a radius of 1.900 arc min
This is 1.430 arc min from the center of the uvot region
The area of the BAT error circle is 11.34 sq. arc min
The UVOT/BAT overlap is 4.26 sq. arc min or 0.38 of the BAT error circle
The XRT error circle is centered at (227.4146,-6.2907) with a radius of 0.050 arc min
This is 1.380 arc min from the center of the uvot region
The area of the XRT error circle is 0.008 sq. arc min
The UVOT/XRT overlap is 0.001 sq. arc min or 0.18 of the XRT error circle
image afterglow message for exposure 1 of trigger 1061482
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210729d15h26m59s139088usUT
Observation start time is 2021-07-24T20:16:41.4
Examining file ./1061482_g151_uvot_catalog_image.fits
The exposure ID is 648850601
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 13 detected source(s) for 1061482_g151
Aspect correction adds -0.00114 degrees (-0.274 sec of time = -4.09 arc sec) to RA
Aspect correction adds 0.00051 degrees ( 1.85 arcsec) to Dec
Total aspect correction is 4.49 arcsec
Star catalogs centered at 227.4041 , -6.2731 with radius 2.42 arc min.
n_usno: 60 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 11 matched entries is 0.383" for 1061482_g151
Mean and std. dev of mag. difference (MAG_DELTA) are 0.954 and 0.421 for 1061482_g151
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 1061482_g151.
Acceptable entries have no ID, XRT distances < 7.5", 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=227.4246 (15:09:41.90) DEC=-6.2786 (-06:16:42.9)
XRT distances are from RA=227.4146 (15:09:39.51) DEC=-6.2907 (-06:17:26.5)
-----------------
Entry 2 in the list of sources is a candidate afterglow for 1061482_g151 with genie
ra=227.41487 (15:09:39.57) dec=-6.27351 (-06:16:24.7) +/- 0.7" mag=19.86+/-0.18
dist=61.8 REFID=7 major=4.4 minor=3.4 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 28.7 arc sec from the BAT position.
Found 3 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
227.4106 -6.2754 16.8 -1 USNO-B1 19.68 19.11 19.36
227.4136 -6.2745 5.6 -1 USNO-B1 20.51 19.75 20.09
227.4148 -6.2781 16.6 -1 USNO-B1 13.64 12.77 13.16
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 4.4
-----------------
Entry 5 in the list of sources is a candidate afterglow for 1061482_g151 with genie
ra=227.41815 (15:09:40.36) dec=-6.27569 (-06:16:32.5) +/- 0.6" mag=18.21+/-0.15
dist=55.4 REFID=10 major=7.6 minor=2.4 flag=2 (blended)
*** The position of this source is inconsistent with the XRT position.
The position is 40.0 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
227.4136 -6.2745 16.7 -1 USNO-B1 20.51 19.75 20.09
227.4148 -6.2781 14.9 -1 USNO-B1 13.64 12.77 13.16
227.4220 -6.2757 13.9 -1 USNO-B1 18.52 18.16 18.31
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 7.6
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
227.4167 -6.2904 7.6 -1 USNO-B1 18.39 17.91 18.12
The closest star is 7.60" away.
List UVOT sources within 10" of the XRT position:
There are 65255.391 counts in the bkg source region of 5980.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 10.912 counts/pixel (5-sig UL in 4" is 20.05 mag) for 1061482_g151
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 20.61, XRT distances < 7.5",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1061482_648850601_210729d15h26m59s139088usUT_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(227.4016,-6.2717,45")
fk5;-circle(227.406075188664,-6.2725318105495,6")
fk5;-circle(227.399870397002,-6.27587556209806,6")
fk5;-circle(227.414868945762,-6.27351428107004,6")
fk5;-circle(227.406929858618,-6.25998506644423,6")
fk5;-circle(227.39368480753,-6.26149751245496,6")
image paragraph message for exposure 1 of trigger 1061482
IMAGE PROBLEM: partial overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB210724 (Swift/BAT trigger 1061482) at 20:14:09 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 124 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 18% of
the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag.
The 8'x8' region for the list of sources generated on-board covers 100% of the
XRT error circle. The list of sources is typically complete to about 18 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.097.
------- notes for trigger 1061482 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210729d15h27m05s501165usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1061482
-expid=648850601 -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/1061482/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
XRT position found for srclist. XRT position found for Genie image. BAT
position found.
UVOT exposure began at MET 648850601.36086 or about 2021:205:20:16:36 UT
Found 299 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 72 sources in
srclist catalog. Found 48 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
19.22 mag.
Found 13 source(s) in Genie image catalog. 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 20.61 mag. Found 56 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
6% of the Genie image region.
Genie image analysis:
Found 65255.4 counts in the large background region of 5980.0 pixels or a rate
of 10.912 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 19.88 mag. for a
4-arcsec aperture.
Found 2 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 227.4166 dec= -6.2903 mag=19.57 sep=7.22".
The closest srclist source has ra= 227.4166 dec= -6.2903 mag=19.57 sep=7.22".
The closest Genie source has ra= 227.4056 dec= -6.2857 mag=17.51 sep=36.98".
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 150 seconds with the White filter
starting 124 seconds after the BAT trigger. There is a candidate afterglow in
the list of sources generated on-board at
RA(J2000) = 15:09:39.99 = 227.41661
DEC(J2000) = -06:17:25.0 = -6.29027
with a 90%-confidence error radius of about 1.10 arc sec. This position is 7.22
arc sec. from the center of the XRT error circle. The estimated magnitude is
19.57 with a 1-sigma error of about 0.35. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.097.
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?
648850601 124 WHITE srclist found no candidates.
648850601 124 WHITE image found no candidates.
List afterglow candidates for other finding charts.
648850759 282 U srclist found no candidates.
648850759 282 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -6.29069
GRB_ERROR: 7.5
GRB_RA: 227.41463
IMAGE_START_TIME: 20:16:36
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT