LIGO- G060099-00-Z March 22, 2006March 2006 LSC Meeting - DetChar 1 S5 Spectral Line Catalogue Status Keith Thorne (PSU) for the Spectral Line Catalogue.

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Presentation transcript:

LIGO- G Z March 22, 2006March 2006 LSC Meeting - DetChar 1 S5 Spectral Line Catalogue Status Keith Thorne (PSU) for the Spectral Line Catalogue Sub-Group M. Landry, R. Schofield, B. O’Reilly, S. Klimenko, V. Mandic, V. Dergachev, N. Fotopoulos, S. Waldman et.al.

LIGO- G Z March 22, 2006March 2006 LSC Meeting - DetChar 2 Spectral Line Sub-Group Formed following the March 2005 LSC meeting Sub-Group charge includes »Cataloging of spectral lines found by analysis teams »Identify sources of these lines »Work to remove most problematic ones »Provide monitoring of lines to track progress, etc. Work supports efforts of commissioners, analysis groups (Pulsar, Burst, Stochastic) Regular reports to main DetChar group

LIGO- G Z March 22, 2006March 2006 LSC Meeting - DetChar 3 S5 Spectral Line Web Pages Daily Line-Finding Reports (linked from S5 page) mary.html »Automated daily processing on PSU grid computer »Reports per-IFO lines found in science-mode data »Daily reports have links, suggestions for SciMon investigations Main S5 Spectral Line Page »Has links to S5 investigations of Spectral-Line sub-group –Send us information on investigations we have missed! »Links to results from previous runs, mechanical resonances

LIGO- G Z March 22, 2006March 2006 LSC Meeting - DetChar 4 Line-Finder Improvements in S5 Frequency range expanded to Hz »Violin-mode harmonics now seen > 2 kHz »Range can be expanded above 2 kHz (if there is interest) Compares lines to list of previously-found lines »Line tabulation color-coded to separate known from new »Separate tabular report on new lines »Includes line identification, if known »Reference line list updated every 2-3 weeks Automated search for harmonic ‘combs’ Improved algorithm for close-lying lines (Feb 06) »Now correctly finds most violin-mode lines

LIGO- G Z March 22, 2006March 2006 LSC Meeting - DetChar 5 S5 Line Identifications H1 - Extended 60 Hz comb - Solved! »Comb of harmonics (+ side-bands) extending past 2KHz »Several investigation made but nothing conclusive »Finally traced to poor RF distribution cabling - Fixed Feb 9, 2006 by R. Taylor, et.al. L Hz comb - Solved! »Comb of Hz harmonics up to 150 Hz »Identified as “bounce-mode” - S. Waldman investigated causes »Solved with new Beam-Splitter de-whitening board - Jan 21 L Hz Combs - Identified »S. Waldman found strong coherence with optical levers Also see R. Schofield’s PEM injection report

LIGO- G Z March 22, 2006March 2006 LSC Meeting - DetChar 6 Some Spectral Line Mysteries 329 Hz Lines (all IFOs) »Strong enough that 2nd, 3rd harmonics seen »Some speculative identifications (i.e. R. Adhikari - BS Violin Modes) Hz Lines (all IFOs) »2nd, 3rd Harmonics often seen »Coherences in other interferometer channels 546,566 Hz Lines (H1 only) »Again, 2nd, 3rd harmonics often seen »Coherent with some WFS channels 2.60, 2.64 Hz combs (H2 only) »Extend from Hz »Seen in ETMX, ETMY shadow sensors

LIGO- G Z March 22, 2006March 2006 LSC Meeting - DetChar 7 More Spectral Line Mysteries 600 Hz Line (H2 Only) »Other 60Hz harmonics die out by 300 Hz Broad feature near 1620 Hz (H2 Only) »Wanders from Hz »Can be problematic for Photon Calibrator measurement »Some investigation 960 Hz Line (L1 Only) »Both a narrow line (like 1921 Hz feature) and a broader line »Other 60 Hz harmonics die out by Hz Narrow 1921 Hz Line (L1 Only)

LIGO- G Z March 22, 2006March 2006 LSC Meeting - DetChar 8 Filters for Spectral-Line Removal Linear Predictor Filters (S. Chatterji, et.al.) »Used in some Burst Searches (WaveBurst, CorrPower, Q Pipeline) »Can propagate glitches to adjoining time segments Regression Filters (PSU group) »Uses auxiliary channel to create filters »Works great on injections (calibration lines, photon calibrator) »Does NOT work well for power-line harmonics in DARM_ERR Kalman Line Filters (PSU group) »Developed for filtering violin-mode resonances »Now used (S5) to reduce power-line harmonics for BlockNormal »Now testing automated line-finder+Kalman filter on network analysis pipeline (M. Rakmanhov)

LIGO- G Z March 22, 2006March 2006 LSC Meeting - DetChar 9 Further Plans for S5 Support upcoming commissioning work at LLO Produce spectral-line lists for S5 epochs »Used by Pulsar group, but only for lines with identified causes Document line-finder software package »Can be used on arbitrary channels Release Kalman-based line-removal filter software If desired, create quick-turnaround line-finder for commissioning, SciMons