Study of the coincidences between the gravitational wave detectors EXPLORER and NAUTILUS in 2001

TL;DR

This paper reports a search for gravitational wave bursts using the EXPLORER and NAUTILUS detectors in 2001, revealing a notable coincidence excess when detectors are aligned with the Galactic Disk, suggesting potential gravitational wave signals.

Contribution

It presents a new analysis of 2001 data with improved algorithms, confirming previous findings and identifying a significant coincidence excess related to detector orientation.

Findings

Detected a coincidence excess aligned with the Galactic Disk

Confirmed previous 1998 coincidence observations

Enhanced data analysis methods applied

Abstract

We report the result from a search for bursts of gravitational waves using data collected by the cryogenic resonant detectors EXPLORER and NAUTILUS during the year 2001, for a total measuring time of 90 days. With these data we repeated the coincidence search performed on the 1998 data (which showed a small coincidence excess) applying data analysis algorithms based on known physical characteristics of the detectors. With the 2001 data a new interesting coincidence excess is found when the detectors are favorably oriented with respect to the Galactic Disk.