We describe recent modifications to the resonant mass gravitational wave detector Niobe, which have resulted in improved sensitivity and more efficient cryogenics. Data are presented indicating a noise temperature of 400 muK for a bandwidth of 2 Hz. A preliminary search for anomalous burst events correlated with cosmic ray showers does not indicate statistically significant correlations, but is of insufficient duration to obtain a definitive conclusion.
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Coward et al. (2002) studied this question.
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