image overlap message for exposure 1 of trigger 1035922
uvot_overlap.pl vrs. 2010-12-20b fem started at 210308d16h49m55s439333usUT
The observation of trigger 1035922 started 2021-03-05T19:04:56.2
Examining file ./1035922_g111_uvot_sky_image.fits
The exposure ID is 636663896
The exposure time is 149.967 (seconds)
The filter is WHITE.
The uvot region is centered at (319.8171,34.5508) with a roll angle of 142.6
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 (319.8079,34.5480) with a radius of 1.000 arc min
This is 0.482 arc min from the center of the uvot region
The area of the BAT error circle is 3.14 sq. arc min
The UVOT/BAT overlap is 3.05 sq. arc min or 0.97 of the BAT error circle
The XRT error circle is centered at (319.8105,34.5540) with a radius of 0.023 arc min
This is 0.378 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 1 of trigger 1035922
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210308d16h49m59s305166usUT
Observation start time is 2021-03-05T19:04:56.2
Examining file ./1035922_g111_uvot_catalog_image.fits
The exposure ID is 636663896
The exposure is 149.967 sec.
The bin size is 2 pixels
The filter is WHITE
There are 30 detected source(s) for 1035922_g111
Aspect correction adds 0.00020 degrees (0.048 sec of time = 0.59 arc sec) to RA
Aspect correction adds -0.00074 degrees (-2.68 arcsec) to Dec
Total aspect correction is 2.74 arcsec
Star catalogs centered at 319.8153 , 34.5505 with radius 2.69 arc min.
n_usno: 274 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 11.36466
RA DEC Mag Color
bright star 0: 319.84949 (21:19:23.88) 34.57085 (+34:34:15.1) 11.36 USNO-V
Mean distance difference (CAT_DELTA) for 30 matched entries is 0.450" for 1035922_g111
Mean and std. dev of mag. difference (MAG_DELTA) are 1.045 and 0.378 for 1035922_g111
Found 0 entries without IDs and 0 entries that are acceptable afterglow candidates for 1035922_g111.
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=319.8079 (21:19:13.90) DEC=34.5480 (+34:32:52.8)
XRT distances are from RA=319.8105 (21:19:14.53) DEC=34.5540 (+34:33:14.5)
Found 2 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
319.8097 34.5554 5.5 -1 USNO-B1 15.34 14.16 14.68
319.8106 34.5567 9.7 -1 USNO-B1 17.03 15.43 16.14
The closest star is 5.53" away.
List UVOT sources within 10" of the XRT position:
Matched source ra=319.80947 (21:19:14.27) dec=34.55518 (+34:33:18.7) +/- 0.6" mag=15.82+/-0.14 dist=5.2 REFID=12 flag=0
There are 1.1979811E+05 counts in the bkg source region of 5609.0000 pixels.
Rate in bkg region from 0 to 45 arcsec is 21.358 counts/pixel (5-sig UL in 4" is 19.69 mag) for 1035922_g111
There are 8764.7490 counts in the xrt source region of 201.00000 pixels.
Rate in xrt region with 8 arcsec radius is 43.606 counts/pixel for 1035922_g111
There are 23541.678 counts in the xrt_bkg source region of 1107.0000 pixels.
Rate in xrt_bkg region from 15 to 25 arcsec is 21.266 counts/pixel (5-sig UL in 4" is 19.69 mag) for 1035922_g111
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 20.24, 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: 1035922_636663896_210308d16h49m59s305166usUT_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(319.8171,34.5508,45")
fk5;-circle(319.809467729609,34.5551830986667,6")
fk5;-circle(319.813359982436,34.5506933560691,6")
fk5;-circle(319.808090976195,34.5611146750435,6")
fk5;-circle(319.812096278369,34.5469450661365,6")
fk5;-circle(319.815196867531,34.5628811961178,6")
fk5;-circle(319.818681302029,34.5619332154883,6")
fk5;-circle(319.811254365946,34.5395351724625,6")
fk5;-circle(319.829962994402,34.5456415244521,6")
fk5;-circle(319.83133141653,34.5439027471741,6")
Region file: 1035922_636663896_210308d16h49m59s305166usUT_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(319.81054,34.55403,8")
Region file: 1035922_636663896_210308d16h49m59s305166usUT_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(319.81054,34.55403,25")
fk5;-circle(319.81054,34.55403,15")
fk5;-circle(319.813359982436,34.5506933560691,6")
fk5;-circle(319.808090976195,34.5611146750435,6")
fk5;-circle(319.812096278369,34.5469450661365,6")
image paragraph message for exposure 1 of trigger 1035922
SRCLIST PROBLEM: srclist filled telemetry buffer
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 GRB210305 (Swift/BAT trigger 1035922) at 19:03:04 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 85 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
0.155.
------- notes for trigger 1035922 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210308d16h50m03s447942usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1035922
-expid=636663896 -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/1035922/
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 636663896.16072 or about 2021:064:19:04:51 UT
Found 1470 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 26% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 9 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 30 source(s) in Genie image catalog. 1 source(s) are within 10.0" of the
xrt position. Found 0 Genie image source(s) without IDs. There are 0 good
candidate(s) in the Genie image catalog. Good candidates must be brighter than
20.24 mag. Found 270 stars in largest star catalog for Genie image region. The
stars will eliminate afterglows from about 25% of the Genie image region.
Genie image analysis:
Found 119798.1 counts in the large background region of 5609.0 pixels or a rate
of 21.358 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 19.51 mag. for a
4-arcsec aperture.
Found 8764.7 counts in the XRT position region of 201.0 pixels or a rate of
43.605 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 29.935 +/- 0.651 (1-sigma) cps or
15.91 mag and a range from 15.89 to 15.93 mag. The 3-sigma UL at the XRT
position is 31.888 cps or 15.84 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 19.03 mag.
Found 1 srclist source(s) within 10.0" of the XRT position.
The brightest such source has ra= 319.8097 dec= 34.5552 mag=16.68 sep=4.72".
The closest srclist source has ra= 319.8097 dec= 34.5552 mag=16.68 sep=4.72".
Found 1 Genie source(s) within 10.0" of the XRT position. The brightest such
source has ra= 319.8095 dec= 34.5552 mag=15.82 sep=5.23". The closest Genie
source has ra= 319.8095 dec= 34.5552 mag=15.82 sep=5.23".
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 85 seconds after the BAT trigger. There is a candidate afterglow in
the rapidly available 2.7'x2.7' sub-image at
RA(J2000) = 21:19:14.27 = 319.80947
DEC(J2000) = +34:33:18.6 = 34.55518
with a 90%-confidence error radius of about 0.61 arc sec. This position is 5.23
arc sec. from the center of the XRT error circle. The estimated magnitude is
15.82 with a 1-sigma error of about 0.14. No correction has been made for the
expected extinction corresponding to E(B-V) of 0.155.
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?
636663896 84 WHITE srclist found no candidates.
636663896 84 WHITE image found no candidates.
List afterglow candidates for other finding charts.
636664108 296 ? srclist data are not available.
636664108 296 U image found no candidates.
636664687 875 WHITE srclist found no candidates.
636664687 875 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: 34.55403
GRB_ERROR: 5
GRB_RA: 319.81054
IMAGE_START_TIME: 19:04:51
MAGNITUDE: 15.8
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT