E11 Segment Data Quality Repository
Peter Shawhan, Keith Riles
This page has links to files containing information about science-mode
segments in each detector during the E11 run. Science mode segment
numbers for each interferometer were incremented each time a control room
operator pushed the "GO" button to indicate start of science mode conditions.
As in the past, the segment numbers will be permanent,
and many e-log entries refer to them by IFO and segment index (e.g., H1-27).
This repository provides data quality summary information on individual
segments, based on the work of many investigators. Data quality flags are
listed for time intervals, and links to more detailed information are provided,
where appropriate. Links
to segment manipulation tools (e.g, segwizard) are also included.
For each detector, there is an ASCII file ( E11H1_seginfo_work.txt
which details any information learned about each segment which indicates
that it is bad or potentially bad data. These files are maintained by hand.
As information is learned and added to these files, they are periodically
copied to different names incorporating a specific version number,
and the information is also distilled and presented in a few other files:
E11*v*_seginfo.html : a copy of the seginfo
file with some HTML mark-up.
E11*v*_segs.html : a more compact, fixed-format
list, consisting of:
Note that there may be more than one line for a given segment index, if
the set of applicable bad-flags changes during
the segment. The user is expected to decide which bad-flags should be heeded,
omit those time intervals from the list, and stitch back together any contiguous
intervals which were not omitted.
E11*v*_segs.txt : like E11*v*_segs.html
, but without the hyperlinks.
Note that any given segment will retain the same numerical index in all
versions of the lists, but it may acquire bad-flags indicating that it
is bad or potentially bad.
Segment index (hyperlinked to the seginfo file)
Bitmask value representing bad-flags which apply
to this time interval
List of bad-flag names, if any, which apply to this time interval
The goal of this effort is to determine what data is suitable for searching
for gravitational waves, and to provide this information in a machine-readable
form. The success of this effort will depend on individuals examining the
data, identifying effects which might cause the data to be bad,
and then evaluating which effects are serious enough to disqualify
data. Contributions are eagerly awaited; Keith Riles (firstname.lastname@example.org
) will collect this information and maintain the segment info files.
Version 00 files -- Generated in real-time at Hanford
Segment lists (ASCII):
Single-IFO: E11H1v00_segs.txt ,
Version 01 files -- December 18, 2004
This release takes explicit account of the following issues:
Of interest to calibration aficianados:
- Severe H1 glitching due to end-mass controller
(Alex Ivanov, Dave Barker, Daniel Sigg) - LHO elog entry
- Repetitive H2 glitching due to cycling dust monitor
(David Strom, Nathan Hindman) - LHO elog entry
- Smoke alarm chirping in the LVEA (Mark Lubinski) - LHO elog entry
- State of H2 AS2I servo (on=okay, off=better, saturated=bad) (Keita Kawabe, Gerardo Moreno) - LHO elog entry
- Beam centering servo off (Betsy Weaver, Fred Raab, Mark Lubinski) - (LHO elog entries: 1, 2)
- Person in the LVEA (from elog)
- Ratty IFO conditions (from elog)
- No calibration line -- version 1 (from elog)
- Non-standard configuration - filters, gains, etc. (from elog)
- Intervals outside official E11 period (Peter Shawhan)
- Missing data (Peter Shawhan)
- Lock loss and pre-Lock loss (Peter Shawhan)
Segment lists (html): E11H1v01_segs.html
Segment lists (ASCII): E11H1v01_segs.txt
Full segment info (html): E11H1v01_seginfo.html
Full segment info (ASCII): E11H1v01_seginfo.txt
Segment lists (ASCII): E11H1H2v01_segs.txt
Notes on coincidence segment lists
Notes on two incorrect version-0 segments (added 12/22/04)
Graphical summaries of segment data