image overlap message for exposure 2 of trigger 1038247
uvot_overlap.pl vrs. 2010-12-20b fem started at 210324d09h57m37s903938usUT
The observation of trigger 1038247 started 2021-03-23T22:07:47.0
Examining file ./1038247_g328_uvot_sky_image.fits
The exposure ID is 638230067
The exposure time is 249.935 (seconds)
The filter is U.
The uvot region is centered at (317.9581,25.3771) with a roll angle of 111.5
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 (317.9520,25.3780) with a radius of 3.000 arc min
This is 0.333 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 (317.9467,25.3693) with a radius of 0.027 arc min
This is 0.773 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 1038247
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210324d09h57m51s817292usUT
Observation start time is 2021-03-23T22:07:47.0
Examining file ./1038247_g328_uvot_catalog_image.fits
The exposure ID is 638230067
The exposure is 249.935 sec.
The bin size is 2 pixels
The filter is U
There are 20 detected source(s) for 1038247_g328
Aspect correction adds 0.00107 degrees (0.256 sec of time = 3.46 arc sec) to RA
Aspect correction adds -0.00063 degrees (-2.26 arcsec) to Dec
Total aspect correction is 4.13 arcsec
Star catalogs centered at 317.9555 , 25.3787 with radius 2.71 arc min.
n_usno: 181 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 9.255
RA DEC Mag Color
bright star 0: 317.98206 (21:11:55.69) 25.39626 (+25:23:46.6) 9.25 USNO-V
Mean distance difference (CAT_DELTA) for 12 matched entries is 0.523" for 1038247_g328
Mean and std. dev of mag. difference (MAG_DELTA) are 0.973 and 0.506 for 1038247_g328
Found 8 entries without IDs and 6 entries that are acceptable afterglow candidates for 1038247_g328.
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.
2 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=317.9520 (21:11:48.48) DEC=25.3780 (+25:22:40.8)
XRT distances are from RA=317.9467 (21:11:47.20) DEC=25.3693 (+25:22:09.5)
*** WARNING 40 per cent of entries have no IDs.
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1038247_g328 with genie
ra=317.95418 (21:11:49.00) dec=25.37599 (+25:22:33.6) +/- 1.1" mag=20.10+/-0.32
dist=34.3 REFID=17 major=2.7 minor=1.6 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 10.1 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
317.9509 25.3772 11.5 -1 USNO-B1 21.02 19.30 20.07
317.9576 25.3746 12.2 -1 USNO-B1 18.09 16.75 17.34
317.9493 25.3775 16.7 -1 USNO-B1 20.08 18.94 19.44
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 2.7
-----------------
Entry 2 in the list of sources is a candidate afterglow for 1038247_g328 with genie
ra=317.96087 (21:11:50.61) dec=25.38061 (+25:22:50.2) +/- 1.2" mag=20.34+/-0.38
dist=61.5 REFID=13 major=2.0 minor=1.5 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 30.3 arc sec from the BAT position.
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
317.9631 25.3813 7.7 -1 USNO-B1 19.57 18.55 19.00
317.9644 25.3806 11.3 -1 USNO-B1 19.24 18.21 18.67
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 2.0
-----------------
Entry 5 in the list of sources is a candidate afterglow for 1038247_g328 with genie
ra=317.96371 (21:11:51.29) dec=25.38276 (+25:22:57.9) +/- 0.8" mag=19.35+/-0.22
dist=73.6 REFID=11 major=2.0 minor=1.7 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 41.8 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
317.9631 25.3813 5.7 -1 USNO-B1 19.57 18.55 19.00
317.9644 25.3806 8.0 -1 USNO-B1 19.24 18.21 18.67
317.9629 25.3874 16.8 -1 USNO-B1 20.56 19.77 20.12
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 2.0
-----------------
Entry 8 in the list of sources is a candidate afterglow for 1038247_g328 with genie
ra=317.96926 (21:11:52.62) dec=25.38674 (+25:23:12.3) +/- 0.7" mag=19.01+/-0.19
dist=96.6 REFID=7 major=3.0 minor=1.8 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 64.4 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
317.9709 25.3899 12.8 -1 USNO-B1 18.77 17.23 17.91
*** If XRT position is correct, then this is NOT the afterglow
*** unacceptable major profile of 3.0
-----------------
Entry 17 in the list of sources is a candidate afterglow for 1038247_g328 with genie
ra=317.92403 (21:11:41.77) dec=25.37880 (+25:22:43.7) +/- 0.7" mag=18.40+/-0.17
dist=81.2 REFID=15 major=0.7 minor=0.4 flag=16 (aperture_incomplete)
*** The position of this source is inconsistent with the XRT position.
The position is 91.0 arc sec from the BAT position.
This source is near the edge of image (1.036)
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
317.9235 25.3784 2.4 -1 USNO-B1 15.45 14.54 14.94 *
317.9220 25.3764 10.9 -1 USNO-B1 21.02 18.97 19.88
Due to star catalog entries marked with *, this is probably NOT the afterglow
These entries are within 5.25" or brighter than 12 mag
-----------------
Entry 18 in the list of sources is a candidate afterglow for 1038247_g328 with genie
ra=317.97002 (21:11:52.81) dec=25.39745 (+25:23:50.8) +/- 0.7" mag=18.72+/-0.18
dist=126.6 REFID=2 major=1.8 minor=1.4 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 91.3 arc sec from the BAT position.
This source is near the edge of image (0.927)
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
317.9652 25.3977 15.8 -1 USNO-B1 19.52 18.50 18.95
317.9708 25.3962 5.1 -1 USNO-B1 20.06 99.99 99.99 *
317.9685 25.3983 5.8 -1 USNO-B1 19.95 18.00 18.87
317.9740 25.3958 14.0 -1 USNO-B1 19.56 18.81 19.14
317.9744 25.3959 15.2 -1 USNO-B1 19.11 18.48 18.76
317.9705 25.3992 6.4 -1 USNO-B1 99.99 19.16 99.99
317.9701 25.4011 13.1 -1 USNO-B1 18.36 17.88 18.09
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 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 27888.398 counts in the bkg source region of 5537.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 5.037 counts/pixel (5-sig UL in 4" is 19.59 mag) for 1038247_g328
There are 993.03314 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 4.940 counts/pixel for 1038247_g328
There are 5298.0942 counts in the xrt_bkg source region of 1164.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 4.552 counts/pixel (5-sig UL in 4" is 19.64 mag) for 1038247_g328
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 20.14, 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: 1038247_638230067_210324d09h57m51s817292usUT_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(317.9581,25.3771,45")
fk5;-circle(317.954177149349,25.375991123677,6")
fk5;-circle(317.957719028882,25.3747113478325,6")
fk5;-circle(317.960870021582,25.3806084197633,6")
fk5;-circle(317.953350587337,25.3675036654921,6")
fk5;-circle(317.964314667461,25.3805221800777,6")
fk5;-circle(317.963708569585,25.3827628700617,6")
fk5;-circle(317.967909821399,25.3785563783045,6")
fk5;-circle(317.969261652598,25.3867417234243,6")
Region file: 1038247_638230067_210324d09h57m51s817292usUT_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(317.94667,25.36931,8")
Region file: 1038247_638230067_210324d09h57m51s817292usUT_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(317.94667,25.36931,25")
fk5;-circle(317.94667,25.36931,15")
fk5;-circle(317.953350587337,25.3675036654921,6")
image paragraph message for exposure 2 of trigger 1038247
SRCLIST PROBLEM: srclist filled telemetry buffer
------ Start for Possible Stand-alone Circular ----
In response to GRB210323 (Swift/BAT trigger 1038247) at 22:02:18 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
301 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. The typical 3-sigma upper limit has been about 19.2 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 18.0 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.131.
------- notes for trigger 1038247 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210324d09h57m55s628124usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1038247
-expid=638230067 -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/1038247/
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 638230067.02134 or about 2021:082:22:07:42 UT
Found 1724 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 15% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 50 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 20 source(s) in Genie image catalog. Found 8 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.14 mag. Found 177 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
16% of the Genie image region.
Genie image analysis:
Found 27888.4 counts in the large background region of 5537.0 pixels or a rate
of 5.037 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 19.44 mag. for a
4-arcsec aperture.
Found 993.0 counts in the XRT position region of 201.0 pixels or a rate of
4.940 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.312 +/- 0.136 (1-sigma) cps or
19.45 mag and a range from 19.06 to 20.07 mag. The 3-sigma UL at the XRT
position is 0.720 cps or 18.55 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.30 mag. The closest
srclist source has ra= 317.9317 dec= 25.3718 mag=17.45 sep=49.43". The closest
Genie source has ra= 317.9534 dec= 25.3675 mag=19.12 sep=22.68".
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?
638230067 301 U srclist found no candidates.
638230067 301 U image found no candidates.
List afterglow candidates for other finding charts.
638229853 87 WHITE srclist found no candidates.
638229853 87 WHITE image found no candidates.
638230643 877 WHITE srclist found no candidates.
638230643 877 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 25.36931
GRB_ERROR: 5
GRB_RA: 317.94667
IMAGE_START_TIME: 22:07:42
MAGNITUDE: 18.6
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT