srclist overlap message for exposure 1 of trigger 1100848
uvot_overlap.pl vrs. 2010-12-20b fem started at 220402d04h08m16s949578usUT
The observation of trigger 1100848 started 2022-04-02T04:00:30.3
Examining file 1100848_g347_uvot_sky_srclist.fits
The exposure ID is 670564830
The exposure time is undefined.
The filter is U.
The uvot region is centered at (30.6893,-61.3710) with a roll angle of 339.2
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 (30.6920,-61.3760) with a radius of 3.000 arc min
This is 0.310 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
Could not find the location of an XRT error circle
srclist afterglow message for exposure 1 of trigger 1100848
find_uvot_ag.pl vrs. 2020-10-30 fem started at 220402d04h08m20s497662usUT
Observation start time is 2022-04-02T04:00:30.3
Examining file 1100848_g347_uvot_catalog_srclist.fits
The exposure ID is 670564830
The exposure is 249.930 sec.
The bin size is 2 pixels
The filter is U
There are 25 detected source(s) for 1100848_g347
Aspect correction adds 0.00041 degrees (0.098 sec of time = 0.70 arc sec) to RA
Aspect correction adds 0.00089 degrees ( 3.20 arcsec) to Dec
Total aspect correction is 3.27 arcsec
Star catalogs centered at 30.6654 , -61.3853 with radius 8.69 arc min.
n_usno: 521 n_gsc: 0
*** WARNING -- bright star catalog has 4 entries brighter than 12 mag
The brightest has mag 10.1576
RA DEC Mag Color
bright star 0: 30.75611 (02:03:01.47) -61.40874 (-61:24:31.4) 11.76 USNO-V
bright star 1: 30.76124 (02:03:02.70) -61.40923 (-61:24:33.2) 11.40 USNO-R
bright star 2: 30.57578 (02:02:18.19) -61.47043 (-61:28:13.6) 10.16 USNO-V
bright star 3: 30.47740 (02:01:54.58) -61.42359 (-61:25:24.9) 10.72 USNO-V
*** WARNING -- no XRT distances are available.
Mean distance difference (CAT_DELTA) for 23 matched entries is 0.563" for 1100848_g347
Mean and std. dev of mag. difference (MAG_DELTA) are 1.052 and 1.686 for 1100848_g347
Found 3 entries without IDs and 0 entries that are acceptable afterglow candidates for 1100848_g347.
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.
3 sources matched bright stars.
Magnitude criteria will be applied later.
BAT distances are from RA=30.6920 (02:02:46.08) DEC=-61.3760 (-61:22:33.6)
XRT distances are as reported in catalog file.
Found NO acceptable entries.
Unidentified entry closest to BAT position is no. 5:
ra= 30.75833 dec=-61.40843 +/- 1.1" mag=18.61+/-0.35 dist=163.4 REFID=25
Good candidates have no ID, acceptable profiles,
mag between 9.01 and 17.56, 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 1100848
------ Start for Possible Stand-alone Circular ----
In response to GRB220402 (Swift/BAT trigger 1100848) at 03:54:42 UT,
---- UVOT paragraph for Joint or Stand-alone Circular ----
UVOT took a finding chart exposure of 250 seconds with the U filter starting
318 seconds after the BAT trigger. No credible afterglow candidate has been
found in the initial data products. Results 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 100% of the BAT 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 0.035.
------- notes for trigger 1100848 ------
uvot_gcn_auto.pl vrs. 2020-10-27 fem at 220402d04h08m26s303092usUT
Command line: /Home/eud/uvot_tdrss/perl/uvot_gcn_auto.pl -trig=1100848
-expid=670564830 -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/1100848/
Links to data for all triggers can be found at
http://heasarc.gsfc.nasa.gov/docs/swift/uvot_tdrss/
No XRT position found for srclist. BAT position found.
UVOT exposure began at MET 670564830.32754 or about 2022:092:04:00:25 UT
Found 517 stars in largest star catalog for srclist region. The stars will
eliminate afterglows from about 4% of the srclist region. Found 25 sources in
srclist catalog. Found 3 srclist source(s) without IDs. There are 0 good
candidate(s) in the srclist catalog. Good candidates must be brighter than
17.56 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?
670564830 318 U srclist found no candidates.
670564830 318 U image data are not available.
List afterglow candidates for other finding charts.
------- Tokens for Quick GCN -------
CATALOG_TYPE: SRCLIST
FILTER: u
GRB_DEC: -61.37600
GRB_ERROR: 200
GRB_RA: 30.69200
IMAGE_START_TIME: 04:00:25
MAGNITUDE: 18.0
MAG_ERROR: 3.0
MESSAGE_TYPE: NACK
SOURCE: BAT