srclist overlap message for exposure 2 of trigger 1101675
uvot_overlap.pl vrs. 2010-12-20b fem started at 220408d11h11m13s580564usUT
The observation of trigger 1101675 started 2022-04-08T05:51:58.4
Examining file ./1101675_g353_uvot_sky_srclist.fits
The exposure ID is 671089918
The exposure time is undefined.
The filter is U.
The uvot region is centered at (202.4033,47.0674) with a roll angle of 6.7
It is square with sides of 12.05 arc min. for an area of 145.15 sq arc min
The BAT error circle is centered at (202.4020,47.0610) 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 28.27 sq. arc min or 1.00 of the BAT error circle
The XRT error circle is centered at (202.4166,47.0691) with a radius of 0.033 arc min
This is 0.553 arc min from the center of the uvot region
The area of the XRT error circle is 0.003 sq. arc min
The UVOT/XRT overlap is 0.003 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 2 of trigger 1101675
find_uvot_ag.pl vrs. 2020-10-30 fem started at 220408d11h11m27s559797usUT
Observation start time is 2022-04-08T05:51:58.4
Examining file ./1101675_g353_uvot_catalog_srclist.fits
The exposure ID is 671089918
The exposure is 249.924 sec.
The bin size is 2 pixels
The filter is U
There are 190 detected source(s) for 1101675_g353
*** WARNING -- the sources have filled the available telemetry buffer (190).
srclist_overlap returned: bat_overlap 1.000
srclist_overlap returned: xrt_overlap 1.000
Dimmest detected source in 1101675_g353 has mag 19.43
Aspect correction adds 0.00004 degrees (0.010 sec of time = 0.10 arc sec) to RA
Aspect correction adds 0.00115 degrees ( 4.14 arcsec) to Dec
Total aspect correction is 4.14 arcsec
Star catalogs centered at 202.4045 , 47.0887 with radius 8.18 arc min.
n_usno: 595 n_gsc: 0
*** WARNING -- bright star catalog has 4 entries brighter than 12 mag
The brightest has mag 9.16648
RA DEC Mag Color
bright star 0: 202.46102 (13:29:50.64) 47.15482 (+47:09:17.3) 11.03 USNO-B
bright star 1: 202.45963 (13:29:50.31) 47.16258 (+47:09:45.3) 10.02 USNO-R
bright star 2: 202.51278 (13:30:03.07) 47.16373 (+47:09:49.4) 9.67 USNO-V
bright star 3: 202.47292 (13:29:53.50) 47.19544 (+47:11:43.6) 9.17 USNO-V
Mean distance difference (CAT_DELTA) for 30 matched entries is 0.940" for 1101675_g353
Mean and std. dev of mag. difference (MAG_DELTA) are 1.341 and 0.865 for 1101675_g353
Found 161 entries without IDs and 0 entries that are acceptable afterglow candidates for 1101675_g353.
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.
146 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=202.4020 (13:29:36.48) DEC=47.0610 (+47:03:39.6)
XRT distances are from RA=202.4166 (13:29:39.98) DEC=47.0691 (+47:04:08.8)
*** WARNING 84 per cent of entries have no IDs.
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 9:
ra=202.41333 dec= 47.14442 +/- 1.1" mag=18.52+/-0.35 dist=271.2 REFID=113
Found 0 entries in star catalog(s) within 10" of the XRT position.
List UVOT sources within 10" of the XRT position:
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 18.12, XRT distances < 5",
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 2 of trigger 1101675
SRCLIST PROBLEM: srclist filled telemetry buffer
------ Start for Possible Stand-alone Circular ----
In response to GRB220408 (Swift/BAT trigger 1101675) at 05:46:04 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
325 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
0.043.
------- notes for trigger 1101675 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 220408d11h11m32s122447usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1101675
-expid=671089918 -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/1101675/
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 671089918.38796 or about 2022:098:05:51:53 UT
Found 591 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 190 sources in
srclist catalog. WARNING -- srclist catalog buffer filled. Found 161 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 1 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 20.80 mag. Found 23 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 3% of the
Genie image region.
Genie image analysis:
Found 9499.1 counts in the large background region of 6304.0 pixels or a rate
of 1.507 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 20.08 mag. for a
4-arcsec aperture.
Found 315.2 counts in the XRT position region of 198.0 pixels or a rate of
1.592 counts/pixel in a radius of 8.0 arcsec. The net count rate (using local
background region) at the XRT position is 0.084 +/- 0.076 (1-sigma) cps or
20.87 mag and a range from 20.17 to 23.44 mag. The 3-sigma UL at the XRT
position is 0.312 cps or 19.44 mag. The number of srclist sources filled the
available telemetry. The weakest source detected was 19.43 mag. The closest
srclist source has ra= 202.4688 dec= 47.0443 mag=17.78 sep=156.06". The
closest Genie source has ra= 202.3785 dec= 47.0564 mag=19.51 sep=104.08".
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?
671089918 324 U srclist found no candidates.
671089918 324 U image found no candidates.
List afterglow candidates for other finding charts.
671089705 111 WHITE srclist found no candidates.
671089705 111 WHITE 202.41548 47.06931 20.76/20.9 2.8 image Yes
------- Tokens for Quick GCN -------
CATALOG_TYPE: IMAGE
FILTER: u
GRB_DEC: 47.06911
GRB_ERROR: 5
GRB_RA: 202.41658
IMAGE_START_TIME: 05:51:53
MAGNITUDE: 19.4
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT