LIGO-G010316-00-Z Inspiral Upper Limits Detector Characterization Nelson Christensen Carleton College August 15, 2001.

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Presentation transcript:

LIGO-G Z Inspiral Upper Limits Detector Characterization Nelson Christensen Carleton College August 15, 2001

LIGO-G Z IUL – Veto Determination Work with other UL-Detector Characterization groups – Especially Bursts Probably use techniques developed by Burst Det. Char. IUL Det. Char. – 2 teams, each using various DMT tools plus Chirp Search Tools

LIGO-G Z Gregg Harry/Julien Sylvestre Using Julien’s TID program. Time- frequency analysis of interferometer and PEM data. Use LAL/LDAS “findchirp” program developed by Duncan Brown for inspiral search. Use program on PEM channels.

LIGO-G Z N. Christensen / A. Rizzi Examining E4 data : interferometer, mode cleaner and accelerometer. Rizzi code (GRASP) for chirp search Correlation (CorrMon – A. Ottewill) and coincident glitch (NonMon – J. Fenton) software

LIGO-G Z Inspiral UL Study CorrMon with E4 data: LLO L1:LSC-AS_Q Interferometer Out L1:IOO-MC_FMode Cleaner L0:PEM-BSC5_ACCZ Accelerometer –1 PEM Channel to simplify study of developing vetoes

LIGO-G Z IUL Study Also use NonMon (DMT) – looks for correlated glitches – Jacob Fenton, Reed College A. Rizzi’s chirp detector (GRASP) –Concentrated on 900 s of “locked” LLO data, and 3 tools detected simultaneous interferometer and accelerometer events.

LIGO-G Z NonMon Jacob Fenton – Reed College undergrad Reads in 5 min of data to determine  Specify flag threshold (i.e. event > 3.2  ) Set # points/s exceeding threshold Output when 1 to N channels have events in same second

LIGO-G Z NonMon

LIGO-G Z CorrMon 900 seconds Interferometer and accelerometer Calculate correlations for T=9s Trigger when correlation>50%

LIGO-G Z

Chirp Finder Code A. Rizzi using GRASP Break data into 23second sections (~10s calculation time) Search code for chirps in sections Get S/N and probability of detection

LIGO-G Z

3 Monitor “see” same events Ex: Biggest Event of 900s set Chirp: S/N=11.7, probability=0.993 measured on accelerometer channel; high S/N but low probability for interferometer NonMon’s biggest event in interferometer channel: 1438 data points > 3.2 . Accelerometer event also registered. CorrMon: 67% 10 Hz

LIGO-G Z In the 900 s of E4 data 4 coincident events L1:LSC-AS_Q and L0:PEM-BSC5_ACCZ were observed in the three monitors

LIGO-G Z Inspiral UL Det. Char. Strategy as of August 01- Vetoes for E6 Work with Burst UL Det. Char. group Study and characterize E5 data Develop Strategy (to be used in E6) ASAP Choose channels & DMT tools to use - E6 Use existing DMT tools, PLUS an LDAS chirp code to search PEM channels – to be developed Look at some PEMS in mock data challenge 9/01

LIGO-G Z E6 Vetoes Study E5 data THEN create veto triggers for E6 Likely will use GlitchMon, PSLMon, TID, CorrMon and PEMChirpMon (to be developed)