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We describe the Wise Observatory Optical Transient Search (WOOTS), a surveyfor supernovae (SNe) and other variable and transient objects in the fields ofredshift 0.06-0.2 Abell galaxy clusters. We present the survey design anddata-analysis procedures, and our object detection and follow-up strategies. Wehave obtained follow-up spectroscopy for all viable SN candidates, and presentthe resulting SN sample here. Out of the 12 SNe we have discovered, seven areassociated with our target clusters while five are foreground or backgroundfield events. All but one of the SNe (a foreground field event) are Type IaSNe. Our non-cluster SN sample is uniquely complete, since all SN candidateshave been either spectroscopically confirmed or ruled out. This allows us toestimate that flux-limited surveys similar to WOOTS would be dominated (~80%)by SNe Ia. Our spectroscopic follow-up observations also elucidate thedifficulty in distinguishing active galactic nuclei from SNe. In separatepapers we use the WOOTS sample to derive the SN rate in clusters for thisredshift range, and to measure the fraction of intergalactic cluster SNe. Wealso briefly report here on some quasars and asteroids discovered by WOOTS.

Supernovae in Low-Redshift Galaxy Clusters: Observations by the Wise Observatory Optical Transient Search (WOOTS)