image overlap message for exposure 3 of trigger 1095288
uvot_overlap.pl vrs. 2010-12-20b fem started at 220306d20h10m14s511036usUT
The observation of trigger 1095288 started 2022-03-06T18:30:47.4
Examining file ./1095288_g909_uvot_sky_image.fits
The exposure ID is 668284247
The exposure time is 149.857 (seconds)
The filter is WHITE.
The uvot region is centered at (5.3764,71.3481) with a roll angle of 198.4
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 (5.3780,71.3540) with a radius of 3.000 arc min
This is 0.356 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 (5.3879,71.3636) with a radius of 0.038 arc min
This is 0.957 arc min from the center of the uvot region
The area of the XRT error circle is 0.005 sq. arc min
The UVOT/XRT overlap is 0.005 sq. arc min or 1.00 of the XRT error circle
image afterglow message for exposure 3 of trigger 1095288
find_uvot_ag.pl vrs. 2020-10-30 fem started at 220306d20h10m43s833501usUT
Observation start time is 2022-03-06T18:30:47.4
Examining file ./1095288_g909_uvot_catalog_image.fits
The exposure ID is 668284247
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 37 detected source(s) for 1095288_g909
Aspect correction adds 0.00048 degrees (0.115 sec of time = 0.55 arc sec) to RA
Aspect correction adds -0.00083 degrees (-2.97 arcsec) to Dec
Total aspect correction is 3.03 arcsec
Star catalogs centered at 5.3710 , 71.3478 with radius 2.61 arc min.
n_usno: 239 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.1102
RA DEC Mag Color
bright star 0: 5.31739 (00:21:16.17) 71.31271 (+71:18:45.8) 11.11 USNO-V
Mean distance difference (CAT_DELTA) for 36 matched entries is 0.412" for 1095288_g909
Mean and std. dev of mag. difference (MAG_DELTA) are 1.007 and 0.462 for 1095288_g909
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1095288_g909.
Acceptable entries have no ID, XRT distances < 5.75", 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= 5.3780 (00:21:30.72) DEC=71.3540 (+71:21:14.4)
XRT distances are from RA= 5.3879 (00:21:33.10) DEC=71.3636 (+71:21:49.0)
-----------------
Entry 25 in the list of sources is a candidate afterglow for 1095288_g909 with genie
ra=5.45160 (00:21:48.38) dec=71.35058 (+71:21:02.1) +/- 0.6" mag=18.49+/-0.15
dist=87.0 REFID=15 major=0.8 minor=0.6 flag=3 (neighbor+blended)
*** The position of this source is inconsistent with the XRT position.
The position is 85.6 arc sec from the BAT position.
This source is near the edge of image (0.895)
Found 2 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
5.4461 71.3512 6.7 -1 USNO-B1 13.98 12.63 13.23
5.4659 71.3527 18.2 -1 USNO-B1 21.59 19.07 20.19
*** 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 83505.492 counts in the bkg source region of 5723.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 14.591 counts/pixel (5-sig UL in 4" is 19.89 mag) for 1095288_g909
There are 2929.2937 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 14.574 counts/pixel for 1095288_g909
XRT source is too far (57.3897096960505") from center -- do not compute local background.
There are 1 candidate(s) outside XRT error circle with mag < 19.89
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 20.45, XRT distances < 5.75",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
Region file: 1095288_668284247_220306d20h10m43s833501usUT_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(5.3764,71.3481,45")
fk5;-circle(5.37078581677355,71.3499189218301,6")
fk5;-circle(5.36642153292952,71.3608954889216,6")
fk5;-circle(5.39984840272257,71.3504050635264,6")
fk5;-circle(5.39579024238424,71.3478605685984,6")
fk5;-circle(5.38280348193176,71.3445740390752,6")
fk5;-circle(5.35729008101591,71.3471104906001,6")
fk5;-circle(5.40858507810565,71.3576966474841,6")
Region file: 1095288_668284247_220306d20h10m43s833501usUT_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(5.38792,71.36361,8")
image paragraph message for exposure 3 of trigger 1095288
SRCLIST PROBLEM: srclist filled telemetry buffer
------ Start for Possible Stand-alone Circular ----
In response to GRB220306 (Swift/BAT trigger 1095288) at 18:15:37 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 881 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
0.578.
------- notes for trigger 1095288 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 220306d20h10m48s398714usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1095288
-expid=668284247 -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/1095288/
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 668284247.42666 or about 2022:065:18:30:42 UT
Found 2936 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 23% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 22 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 37 source(s) in Genie image catalog. Found 1 Genie image source(s)
without IDs. There are 0 good candidate(s) in the Genie image catalog. Good
candidates must be brighter than 20.45 mag. Found 235 stars in largest star
catalog for Genie image region. The stars will eliminate afterglows from about
23% of the Genie image region.
Genie image analysis:
Found 83505.5 counts in the large background region of 5723.0 pixels or a rate
of 14.591 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 19.72 mag. for a
4-arcsec aperture.
Found 2929.3 counts in the XRT position region of 201.0 pixels or a rate of
14.574 counts/pixel in a radius of 8.0 arcsec. The net count rate (using large
background region) at the XRT position is -0.024 +/- 0.367 (1-sigma) cps. The
3-sigma UL at the XRT position is 1.101 cps or 19.50 mag. The number of srclist
sources filled the available telemetry. The weakest source detected was 18.83
mag. The closest srclist source has ra= 5.4088 dec= 71.3720 mag=18.74
sep=38.49". The closest Genie source has ra= 5.3953 dec= 71.3676 mag=19.11
sep=16.85".
This paragraph is only useful if the XRT position is grossly wrong. There are 1
candidate(s) in the image data with mag < 19.89 inside the BAT error region,
but outside the XRT error region. The brightest such source is at RA=5.45160
(00:21:48.38), DEC=71.35058 (+71:21:02.1) (J2000). It has a mag of 18.49. It is
85.6" from the BAT position.
****THIS SOURCE IS OUTSIDE XRT ERROR CIRCLE--USE WITH CAUTION***
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 881 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 00:21:48.38 = 5.45160
DEC(J2000) = +71:21:02.1 = 71.35058
with a 90%-confidence error radius of about 0.63 arc sec. The estimated
magnitude is 18.49 with a 1-sigma error of about 0.15. No correction has been
made for the expected extinction corresponding to E(B-V) of 0.578.
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?
668284247 880 WHITE srclist found no candidates.
668284247 880 WHITE image found no candidates.
List afterglow candidates for other finding charts.
668283455 88 WHITE srclist found no candidates.
668283455 88 WHITE image found no candidates.
668283667 300 U srclist found no candidates.
668283667 300 U image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 71.36361
GRB_ERROR: 5.75
GRB_RA: 5.38792
IMAGE_START_TIME: 18:30:42
MAGNITUDE: 19.5
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT