srclist overlap message for exposure 1 of trigger 1042031
uvot_overlap.pl vrs. 2010-12-20b fem started at 210409d15h02m16s979767usUT
The observation of trigger 1042031 started 2021-04-09T14:57:48.7
Examining file 1042031_g4422_uvot_sky_srclist.fits
The exposure ID is 639673068
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (244.9361,-15.4725) with a roll angle of 94.0
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 (0.0000,0.0000) with a radius of 3.000 arc min
This is 6718.080 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 0.00 sq. arc min or 0.00 of the BAT error circle
Could not find the location of an XRT error circle
srclist afterglow message for exposure 1 of trigger 1042031
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210409d15h02m18s709179usUT
Observation start time is 2021-04-09T14:57:48.7
Examining file 1042031_g4422_uvot_catalog_srclist.fits
The exposure ID is 639673068
The exposure is 150.000 sec.
The bin size is 2 pixels
The filter is WHITE
There are 74 detected source(s) for 1042031_g4422
Aspect correction adds 0.00010 degrees (0.024 sec of time = 0.34 arc sec) to RA
Aspect correction adds 0.00043 degrees ( 1.56 arcsec) to Dec
Total aspect correction is 1.60 arcsec
Star catalogs centered at 244.9336 , -15.4550 with radius 6.42 arc min.
n_usno: 1023 n_gsc: 0
*** WARNING -- bright star catalog has 1 entries brighter than 12 mag
The brightest has mag 9.97926
RA DEC Mag Color
bright star 0: 244.88298 (16:19:31.91) -15.54711 (-15:32:49.6) 9.98 USNO-V
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 66 matched entries is 0.712" for 1042031_g4422
Mean and std. dev of mag. difference (MAG_DELTA) are 1.659 and 0.376 for 1042031_g4422
Found 10 entries without IDs and 0 entries that are acceptable afterglow candidates for 1042031_g4422.
Acceptable entries have no ID, BAT distance < 200" or XRT distance < 10", 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= 0.0000 (00:00:00.00) DEC= 0.0000 (+00:00:00.0)
XRT distances are as reported in catalog file.
Found NO acceptable entries.
Unidentified entry closest to BAT position is no. 63:
ra=245.00601 dec=-15.46118 +/- 1.1" mag=19.31+/-0.35 dist=402860.6 REFID=49
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 18.66, BAT distances < 200",
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 1042031
------ Start for Possible Stand-alone Circular ----
In response to GRB210409 (Swift/BAT trigger 1042031) at 13:44:05 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of nominal 150.000 seconds with the White
filter starting 4396 seconds after the BAT trigger. No credible afterglow
candidate has been found in the initial data products. Data from the 2.7'x2.7'
sub-image are not available at this time. The 8'x8' region for the list of
sources generated on-board covers none of the BAT error circle. No correction
has been made for extinction.
------- notes for trigger 1042031 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210409d15h02m22s056070usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1042031
-expid=639673068 -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/1042031/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
*** Warning -- no exposure found, using srclist assumed value.
No XRT position found for srclist. BAT position found.
UVOT exposure began at MET 639673068.67098 or about 2021:099:14:57:43 UT
Found 1019 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 17% of the srclist region. Found 74 sources in
srclist catalog. Found 10 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
18.66 mag.
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?
639673068 4396 WHITE srclist found no candidates.
639673068 4396 ? image data are not available.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------