image overlap message for exposure 3 of trigger 1038247
uvot_overlap.pl vrs. 2010-12-20b fem started at 210324d09h57m38s502509usUT
The observation of trigger 1038247 started 2021-03-23T22:17:23.7
Examining file ./1038247_g904_uvot_sky_image.fits
The exposure ID is 638230643
The exposure time is 149.868 (seconds)
The filter is WHITE.
The uvot region is centered at (317.9589,25.3763) 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 0.389 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 0.786 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 3 of trigger 1038247
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210324d09h57m59s756419usUT
Observation start time is 2021-03-23T22:17:23.7
Examining file ./1038247_g904_uvot_catalog_image.fits
The exposure ID is 638230643
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 25 detected source(s) for 1038247_g904
Aspect correction adds 0.00113 degrees (0.271 sec of time = 3.67 arc sec) to RA
Aspect correction adds -0.00080 degrees (-2.86 arcsec) to Dec
Total aspect correction is 4.66 arcsec
Star catalogs centered at 317.9592 , 25.3769 with radius 2.54 arc min.
n_usno: 161 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 23 matched entries is 0.417" for 1038247_g904
Mean and std. dev of mag. difference (MAG_DELTA) are 0.803 and 0.915 for 1038247_g904
Found 2 entries without IDs and 2 entries that are acceptable afterglow candidates for 1038247_g904.
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.
0 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)
-----------------
Entry 16 in the list of sources is a candidate afterglow for 1038247_g904 with genie
ra=317.96459 (21:11:51.50) dec=25.39808 (+25:23:53.1) +/- 0.6" mag=18.23+/-0.15
dist=118.9 REFID=3 major=4.8 minor=3.6 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 83.1 arc sec from the BAT position.
Found 5 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
317.9648 25.3934 16.8 -1 USNO-B1 99.99 19.68 99.99
317.9627 25.3948 13.4 -1 USNO-B1 17.45 16.80 17.09
317.9652 25.3977 2.3 -1 USNO-B1 19.52 18.50 18.95 *
317.9685 25.3983 12.8 -1 USNO-B1 19.95 18.00 18.87
317.9705 25.3992 19.6 -1 USNO-B1 99.99 19.16 99.99
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 22 in the list of sources is a candidate afterglow for 1038247_g904 with genie
ra=317.98034 (21:11:55.28) dec=25.38473 (+25:23:05.0) +/- 0.7" mag=19.78+/-0.20
dist=122.8 REFID=9 major=1.1 minor=0.7 flag=0
*** The position of this source is inconsistent with the XRT position.
The position is 95.3 arc sec from the BAT position.
This source is near the edge of image (0.876)
Found 4 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
317.9779 25.3837 8.8 -1 USNO-B1 17.72 16.81 17.22
317.9790 25.3821 10.3 -1 USNO-B1 16.19 15.29 15.68
317.9821 25.3883 14.0 -1 USNO-B1 19.84 99.99 99.99
317.9822 25.3886 15.1 -1 USNO-B1 20.23 99.99 99.99
*** If XRT position is correct, then this is NOT the afterglow
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
There are 1.2491887E+05 counts in the bkg source region of 5635.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 22.168 counts/pixel (5-sig UL in 4" is 19.67 mag) for 1038247_g904
There are 4316.8403 counts in the xrt source region of 199.00000 pixels.
Rate in xrt region with 8 arcsec radius is 21.693 counts/pixel for 1038247_g904
There are 24845.828 counts in the xrt_bkg source region of 1165.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 21.327 counts/pixel (5-sig UL in 4" is 19.69 mag) for 1038247_g904
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.22, 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_638230643_210324d09h57m59s756419usUT_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(317.9589,25.3763,45")
fk5;-circle(317.949206798962,25.3775435088694,6")
fk5;-circle(317.951475433838,25.3840751062145,6")
fk5;-circle(317.957665876861,25.3745722320299,6")
fk5;-circle(317.953345587196,25.3675100164855,6")
fk5;-circle(317.964400169712,25.3806203971698,6")
fk5;-circle(317.968103330585,25.3785428168925,6")
Region file: 1038247_638230643_210324d09h57m59s756419usUT_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_638230643_210324d09h57m59s756419usUT_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(317.949206798962,25.3775435088694,6")
fk5;-circle(317.953345587196,25.3675100164855,6")
image paragraph message for exposure 3 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 150 seconds with the White filter
starting 878 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 19.6 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
0.131.
------- notes for trigger 1038247 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210324d09h58m03s530940usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1038247
-expid=638230643 -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 638230643.701 or about 2021:082:22:17:18 UT
Found 1708 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 23 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 25 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 20.22 mag. Found 157 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 124918.9 counts in the large background region of 5635.0 pixels or a rate
of 22.168 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 19.49 mag. for a
4-arcsec aperture.
Found 4316.8 counts in the XRT position region of 199.0 pixels or a rate of
21.692 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.485 +/- 0.473 (1-sigma) cps or
20.39 mag and a range from 19.65 to 24.43 mag. The 3-sigma UL at the XRT
position is 1.905 cps or 18.90 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 18.70 mag. The closest
srclist source has ra= 317.9362 dec= 25.3722 mag=18.58 sep=35.54". The closest
Genie source has ra= 317.9534 dec= 25.3675 mag=18.94 sep=22.66".
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?
638230643 877 WHITE srclist found no candidates.
638230643 877 WHITE 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.
638230067 301 U srclist found no candidates.
638230067 301 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 25.36931
GRB_ERROR: 5
GRB_RA: 317.94667
IMAGE_START_TIME: 22:17:18
MAGNITUDE: 18.9
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT