srclist overlap message for exposure 1 of trigger 1048783
uvot_overlap.pl vrs. 2010-12-20b fem started at 210517d09h12m04s642896usUT
The observation of trigger 1048783 started 2021-05-17T05:29:38.0
Examining file ./1048783_g96_uvot_sky_srclist.fits
The exposure ID is 642922178
The exposure time is undefined.
The filter is WHITE.
The uvot region is centered at (358.1819,-39.0995) with a roll angle of 53.0
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 (358.1740,-39.1050) with a radius of 3.000 arc min
This is 0.492 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 (358.2245,-39.1022) with a radius of 0.037 arc min
This is 1.990 arc min from the center of the uvot region
The area of the XRT error circle is 0.004 sq. arc min
The UVOT/XRT overlap is 0.004 sq. arc min or 1.00 of the XRT error circle
srclist afterglow message for exposure 1 of trigger 1048783
find_uvot_ag.pl vrs. 2020-10-30 fem started at 210517d09h12m08s962667usUT
Observation start time is 2021-05-17T05:29:38.0
Examining file ./1048783_g96_uvot_catalog_srclist.fits
The exposure ID is 642922178
The exposure is 149.857 sec.
The bin size is 2 pixels
The filter is WHITE
There are 15 detected source(s) for 1048783_g96
Aspect correction adds 0.00358 degrees (0.858 sec of time = 9.99 arc sec) to RA
Aspect correction adds 0.00322 degrees (11.58 arcsec) to Dec
Total aspect correction is 15.30 arcsec
Star catalogs centered at 358.1860 , -39.1056 with radius 5.83 arc min.
n_usno: 312 n_gsc: 0
Bright star catalog has no entries brighter than 12 mag
Mean distance difference (CAT_DELTA) for 14 matched entries is 0.693" for 1048783_g96
Mean and std. dev of mag. difference (MAG_DELTA) are 1.826 and 0.668 for 1048783_g96
Found 1 entries without IDs and 0 entries that are acceptable afterglow candidates for 1048783_g96.
Acceptable entries have no ID, XRT distances < 5.5", 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=358.1740 (23:52:41.76) DEC=-39.1050 (-39:06:18.0)
XRT distances are from RA=358.2245 (23:52:53.87) DEC=-39.1022 (-39:06:07.9)
Found NO acceptable entries.
Unidentified entry closest to XRT position is no. 8:
ra=358.12923 dec=-39.05069 +/- 1.1" mag=20.59+/-0.35 dist=324.4 REFID=15
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
358.2231 -39.1033 5.4 -1 USNO-B1 20.49 19.02 19.67
358.2228 -39.1007 7.0 -1 USNO-B1 19.76 19.30 19.51
The closest star is 5.41" away.
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 19.22, XRT distances < 5.5",
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 1 of trigger 1048783
IMAGE PROBLEM: no overlap
------ Start for Possible Stand-alone Circular ----
In response to GRB210517 (Swift/BAT trigger 1048783) at 05:28:01 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 150 seconds with the White filter
starting 69 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 none of
the XRT error circle. 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 0.011.
------- notes for trigger 1048783 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 210517d09h12m13s516412usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1048783
-expid=642922178 -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/1048783/
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 642922178.01798 or about 2021:137:05:29:33 UT
Found 308 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 6% of the srclist region. Found 15 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 20.48 mag. Found 29 stars in largest star catalog for
Genie image region. The stars will eliminate afterglows from about 5% of the
Genie image region. The XRT position was OUTSIDE the star catalog search
region.
Genie image analysis:
Found 87213.1 counts in the large background region of 6298.0 pixels or a rate
of 13.848 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 19.75 mag. for a
4-arcsec aperture. The closest srclist source has ra= 358.2529 dec= -39.0782
mag=18.21 sep=117.50". The closest Genie source has ra= 358.1767 dec= -39.0872
mag=19.36 sep=143.99".
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?
642922178 69 WHITE srclist found no candidates.
642922178 69 WHITE image found no candidates.
List afterglow candidates for other finding charts.
642922390 281 U srclist found no candidates.
642922390 281 U image found no candidates.
642922968 859 WHITE srclist found no candidates.
642922968 859 WHITE image found no candidates.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: white
GRB_DEC: -39.10219
GRB_ERROR: 5.5
GRB_RA: 358.22446
IMAGE_START_TIME: 05:29:33
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: XRT