srclist overlap message for exposure 1 of trigger 1037339
uvot_overlap.pl vrs. 2010-12-20b fem started at 210319d01h18m44s037679usUT
The observation of trigger 1037339 started 2021-03-18T03:57:05.2
Examining file ./1037339_g153_uvot_sky_srclist.fits
The exposure ID is 637732625
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (33.9232,-37.7877) with a roll angle of 309.4
It is square with sides of 8.03 arc min. for an area of 64.51 sq arc min
The BAT error circle is centered at (33.9300,-37.7890) with a radius of 3.000 arc min
This is 0.331 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 28.27 sq. arc min or 1.00 of the BAT error circle
The XRT error circle is centered at (33.9262,-37.7769) with a radius of 0.040 arc min
This is 0.663 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
srclist afterglow message for exposure 1 of trigger 1037339
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210319d01h18m47s336548usUT
Observation start time is 2021-03-18T03:57:05.2
Examining file ./1037339_g153_uvot_catalog_srclist.fits
The exposure ID is 637732625
The exposure is 149.868 sec.
The bin size is 2 pixels
The filter is WHITE
There are 12 detected source(s) for 1037339_g153
Aspect correction adds -0.00037 degrees (-0.088 sec of time = -1.05 arc sec) to RA
Aspect correction adds 0.00044 degrees ( 1.60 arcsec) to Dec
Total aspect correction is 1.91 arcsec
Star catalogs centered at 33.9161 , -37.7927 with radius 5.18 arc min.
n_usno: 226 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 11 matched entries is 0.485" for 1037339_g153
Mean and std. dev of mag. difference (MAG_DELTA) are 0.835 and 0.688 for 1037339_g153
Found 1 entries without IDs and 1 entries that are acceptable afterglow candidates for 1037339_g153.
Acceptable entries have no ID, XRT distances < 6", 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=33.9300 (02:15:43.20) DEC=-37.7890 (-37:47:20.4)
XRT distances are from RA=33.9262 (02:15:42.29) DEC=-37.7769 (-37:46:36.9)
-----------------
Entry 0 in the list of sources is a candidate afterglow for 1037339_g153 with 5x5 stamp
ra=33.93629 (02:15:44.71) dec=-37.77216 (-37:46:19.8) +/- 1.1" mag=19.80+/-0.35
dist=33.4 REFID=12
*** The position of this source is inconsistent with the XRT position.
The position is 66.7 arc sec from the BAT position.
src: 0 distr. of nearby unmatched sources: 0 0 0 0 0
Found 0 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)
*** 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:
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 19.22, XRT distances < 6",
are > ~(80 - 10*(mag-6))" from any bright star, and have had duplicates removed.
SUMMARY: 0 good candidate(s) found.
srclist paragraph message for exposure 1 of trigger 1037339
------ Start for Possible Stand-alone Circular ----
In response to GRB210318 (Swift/BAT trigger 1037339) at 03:54:31 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 126 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
0.017.
------- notes for trigger 1037339 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210319d01h19m30s082486usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1037339
-expid=637732625 -meonly -msg_srclist
Results from standard processing of UVOT TDRSS data for this trigger should be
available at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/1037339/
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 637732625.19372 or about 2021:077:03:57:00 UT
Found 222 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 5% of the srclist region. Found 12 sources in
srclist catalog. Found 1 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 3 source(s) in Genie image catalog. 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 20.37 mag. Found 51 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 105785.4 counts in the large background region of 6318.0 pixels or a rate
of 16.743 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 19.64 mag. for a
4-arcsec aperture.
Found 3359.5 counts in the XRT position region of 199.0 pixels or a rate of
16.882 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.489 +/- 0.415 (1-sigma) cps or
20.38 mag and a range from 19.71 to 22.43 mag. The 3-sigma UL at the XRT
position is 1.736 cps or 19.00 mag. The closest srclist source has ra= 33.9363
dec= -37.7722 mag=19.80 sep=33.42". The closest Genie source has ra= 33.9389
dec= -37.7806 mag=20.36 sep=38.55".
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?
637732625 126 WHITE srclist found no candidates.
637732625 126 WHITE image found no candidates.
List afterglow candidates for other finding charts.
637732783 284 U srclist found no candidates.
637732783 284 U image found no candidates.
637733362 863 WHITE srclist found no candidates.
637733362 863 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: white
GRB_DEC: -37.77692
GRB_ERROR: 6
GRB_RA: 33.92621
IMAGE_START_TIME: 03:57:00
MAGNITUDE: 19.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT