LIGO-G030307-00-DM. Landry – Amaldi5 July 9, 2003 Laser Interferometer Gravitational Wave Observatory Monitoring LIGO Data During the S2 Science Run Michael.

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LIGO-G DM. Landry – Amaldi5 July 9, 2003 Laser Interferometer Gravitational Wave Observatory Monitoring LIGO Data During the S2 Science Run Michael Landry LIGO Hanford Observatory/Caltech on behalf of the LIGO Scientific Collaboration (LSC) Detector Characterization Working Group 5 th Edoardo Amaldi Conference on Gravitational Waves - July 9, 03

LIGO-G DM. Landry – Amaldi5 July 9, 2003 Science run monitoring of data Require rapid and accurate diagnostic information on interferometer and environmental channels Data Monitoring Tool (DMT) –DMT defines the environment and the tools necessary to support continuous data monitoring of the LIGO interferometers –Programs (monitors) provide foreground and background monitoring –Output: reports, triggers, trends, data objects (e.g. spectra), alarms What this talk is not: a report on online astrophysical search algorithms (LDAS DSOs) The DMT has many contributors (architecture, DMT authors, users/testers/contributors) –D. Barker, D. Chin, E. Daw, S. Finn, R. Frey, G. Gonzalez, M. Ito, S. Klimenko, M. Landry, S. Marka, B. Mours, T. Olson, A. Ottewill, C. Parameswariah, S. Penn, R. Rahkola, K. Riles, P. Saulson, K. Schlaufman, R. Schofield, D. Sigg, P. Sutton, J. Sylvestre, N. Zotov, and J. Zweizig

LIGO-G DM. Landry – Amaldi5 July 9, 2003 DMT architecture Hardware: Framebroadcaster serves up 5Mb/IFO/s of data, including testpoints (temporary channels) DMT machines have 16s of current data in a ring buffer (make analysis, trends, spectra) All data made rapidly available Software: DMT infrastructure provides data containers, I/0 classes, signal processing algorithms C++ code Root employed for graphics and interactive environment

LIGO-G DM. Landry – Amaldi5 July 9, 2003 A sampling of LIGO monitors Performance Characterization (steady-state monitoring): –Blrms (E. Daw) - Displays and records band-limited RMS (New_Seis_Blrms looks only at seismic channels; LXO_ifo_blrms looks at AS_Q). –LineMonitor (S. Klimenko) - Tracks specified lines in several IFO channels, also reports detected lines above threshold SNR. Data Acquisition / Timing Validation –BitTest (J. Zweizig) - Looks for stuck ADC bits and saturations. –TimeMon (S. Marka) - Checks relative timing with fine resolution Transient Phenomena (glitches, state transitions) –GlitchMon (M. Ito) - Looks for sudden glitches in hundreds of channels (now allows for both adaptive and absolute thresholds). –LockLoss (D. Chin) - Displays and records all lock transitions, displays IFO state vector in abbreviated form. Foreground Monitors –SpectrumArchiver (T. Olson) - A once-per-hour background program that stores spectra for about 200 data channels –RayleighMonitor (P. Sutton) - Time-frequency display of spectral power and "rayleighness" - standard deviation of power over mean power -measures non- Gaussianity. Background

LIGO-G DM. Landry – Amaldi5 July 9, 2003 DMT spy page

LIGO-G DM. Landry – Amaldi5 July 9, 2003 LockLoss report One click from the spy page: reports, spectra, documentation. LockLoss monitors arm powers and IFO subsystems, builds duty cycle statistics D. Chin

LIGO-G DM. Landry – Amaldi5 July 9, 2003 “Inspiral Range” [to see 1.4M sun -1.4 M sun NS-NS Coalescence with SNR=8, average orientation/direction] Histogram of distributions of inspiral range for the three interferometers (first month of S2) Inspiral monitor (with preliminary ranges) P. Sutton Distribution of Range Estimates, Feb 14 – Mar Number of 60s samples LLO 4k LHO 4k LHO 2k Range (kpc)

LIGO-G DM. Landry – Amaldi5 July 9, 2003 LLO LSC Timing monitor example The first 31 days of S2 5us 6.5us 3.5us 2us Max Mean Min DAQ Channel (DAQ time stamp) : H1:DAQGPS_RAMP_EX ( 0 ) Delay = us +/- 798 ns OK... DAQ Channel (DAQ time stamp) : H2:LSC-GPS_RAMP ( 0 ) Delay = us +/- 761 ns Marginal! S. Marka

LIGO-G DM. Landry – Amaldi5 July 9, 2003 Foreground example: Rayleigh monitor P. Sutton Each PSD used 1 second of data divided into 8 pieces Rayleigh statistic (left) and power spectrum (right) for Livingston antisymmetric port output showing injected chirp. – R << 1 (blue) shows power is coherent on 1/8-1 sec scale at low frequencies, where chirp spends many cycles. – R >> 1 (red) shows power is incoherent on 1/8-1 sec scale at high frequencies, where chirp spends few cycles. Rayleigh statistic Power spectrum

LIGO-G DM. Landry – Amaldi5 July 9, 2003 DMT and DTT Figures of Merit Hanford control room - Feb 22, 03

LIGO-G DM. Landry – Amaldi5 July 9, 2003 Sample 12-hour “Figure of Merit 1” at Hanford Mar 8, 03 preliminary ranges E. Daw 12h lookback

LIGO-G DM. Landry – Amaldi5 July 9, 2003 Sample 12-hour “Figure of Merit 2” at Hanford Mar 8, 03 J. Zweizig

LIGO-G DM. Landry – Amaldi5 July 9, 2003 Daily & Weekly Summary Plots One week of Hanford 4k performance (includes part of 66-hour lock)

LIGO-G DM. Landry – Amaldi5 July 9, 2003 Concluding remarks Data Monitoring Tool employed in a wide variety of science run tasks (online reporting, data monitoring, writing triggers to relational database, trends, alarms) DMT reaching maturity and now standard set of windows into data during science run Want to better utilize the DMT during commissioning Next window into the data: make better use of online astrophysical searches