52 research outputs found

    センダイシ テンモンダイ ニオケル カガク ジッケン キョウシツ ノ ジッセン 1 コウガク カッセイ ブッシツ ノ リモネン オ テーマ トシテ

    Get PDF
    平成21年度より、宮城教育大学と仙台市天文台の連携企画の一つとして、理科実験教室「スペースラボ in 仙台市天文台」の実践を行っており、宇宙や天文に関するテーマによる2時間半の実験教室を仙台市天文台で開催した。今回は、平成21年度と22年度の2年間にわたって実施した分子のキラリティをテーマとした化学実験の実践結果について報告する

    Observation results by the TAMA300 detector on gravitational wave bursts from stellar-core collapses

    Get PDF
    We present data-analysis schemes and results of observations with the TAMA300 gravitational-wave detector, targeting burst signals from stellar-core collapse events. In analyses for burst gravitational waves, the detection and fake-reduction schemes are different from well-investigated ones for a chirp-wave analysis, because precise waveform templates are not available. We used an excess-power filter for the extraction of gravitational-wave candidates, and developed two methods for the reduction of fake events caused by non-stationary noises of the detector. These analysis schemes were applied to real data from the TAMA300 interferometric gravitational wave detector. As a result, fake events were reduced by a factor of about 1000 in the best cases. The resultant event candidates were interpreted from an astronomical viewpoint. We set an upper limit of 2.2x10^3 events/sec on the burst gravitational-wave event rate in our Galaxy with a confidence level of 90%. This work sets a milestone and prospects on the search for burst gravitational waves, by establishing an analysis scheme for the observation data from an interferometric gravitational wave detector
    corecore