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Review readiness: S5y2/VSR1 all-sky search using the EGC pipeline

Review readiness presentation - February 14th, 2009

What is the scientific purpose of this analysis project

All-sky, untriggered burst search for arbitrary GW signals with frequency content from 300 Hz and 5 kHz, focusing on the frequency band where Virgo sensitivity was competitive with LIGO detectors's sensitivity. The analysis is using the S5 LIGO (H1, H2 and L1) and VSR1 Virgo data from May 18th 2007 to October 1st.

What are the goals in terms of publications and/or conferences

The results will be compared with that of other algorithms, and published in a single paper, but not used for a combined upper limit following the recipe identified for the S5y1 all-sky burst search, because the frequency band is different from the other pipeline (64 Hz --> 2 kHz).

How the result is expected to be presented

Results of the zero-lag search. The sensitivity of the search will also be given for a bench of tested waveforms that roughly cover the targeted signal space.

An overview of the analysis pipeline (one slide or less)

The analysis consider different network configuration: 4-fold and 3-fold network configuration. EGC is used to process H1, H2, L1 and V1 data streams. A coincident analysis between pair of detectors. Then for a given network all the coincident pair are considered except the H1H2 pair (if concerned). The rejection of the background is done using a set of variable; namely the SNR in each detector, the combined SNR of a pair the difference of the SNR between the 2 detectors. The background is estimated using time shifts. The choice of the threholds is especially done using the background estimate and the efficiency of the analysis.

How mature is the analysis, e.g. have all pipeline parameters been chosen, have preliminary or final sensitivities been evaluated, has the box been opened, etc.

As of Februry 14 th the analysis is essentially complete. The tuning procedure has been set-up. Thresholds and other pipeline parameters have been chosen and the box has been opened for almost all of the network; there are just a few small data sets remaining to be opened. Final sensitivities have been evaluated.

Summarize any results and/or conclusions from the analysis that have been obtained so far

No zero-lag event survives all analysis cuts and CAT3 vetoes in the network whose box has been opened (H1H2L1V1).

How does this analysis compare to previous or concurrent analyses in terms of sensitivity, observation time, etc.

Final comparison with other pipeline sensitivity still remains to be done.

What remains to be done to complete the end-to-end analysis e.g. tuning parts of the pipeline, opening the box, etc.

Triple network configuration have still their box closed.

Certify that the project summary web page is up-to-date (i.e. on )

Not yet. Link has to be added

Where the technical documentation may be found

Project Report Page

That the technical documentation is complete and up-to-date (a listing of its sections may be helpful)

There are many links on the Project Report Page

Where the software, including pre- and post-processing scripts, may be found, i.e. in which CVS repository maintained by DASWG and with what CVS tag has the analysis been done

The EGC software is split into 3 "packages": All the 3 "packages" are in the Cascina CVS repository. The same version of the BuL/TeF and egc packages have been used for the C7 Virgo only analysis. What is new concerns the segments and some script tools to handle the jobs.

Where the configuration files and data products from the analysis are posted for inspection

The script files are available in CVS. The data products are stored on a machine at Carleton (no web public access)

What has been done so far in the way of reviewing the analysis and/or the software

The C7 Virgo analysis has been reviewed. This was a single detector analysis. The VSR1/S5 is a multi-detector pipeline.

IF a paper draft has been written: How complete/mature is it

No paper draft has been written yet.
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