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arXiv 1301.3909astro-ph.CO
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OGLE-IV麦哲伦桥数据中的超新星和其它瞬变

Supernovae and Other Transients in the OGLE-IV Magellanic Bridge Data

S. Kozlowski, A. Udalski, L. Wyrzykowski, R. Poleski, P. Pietrukowicz, J. Skowron, M. K. Szymanski, M. Kubiak, G. Pietrzynski, I. Soszynski, K. Ulaczyk

摘要:

我们分析了两年(2010年年中至2012年年中)的OGLE-IV数据,覆盖了麦哲伦桥(麦哲伦云之间的区域)的~65 deg^2,发现了130个瞬变事件,包括126个超新星(SNe),两个前景矮新星和另外两个类似SNe的瞬变事件,这些瞬变事件后来被证明是活动星系核(AGN)。我们显示我们的SNe检测效率作为SN峰值幅度的函数,根据可用的SNe速率估计。对于SNe峰值星等I<18.8星等,它是100%,而在I=~19.7星等时下降到50%。以我们目前在麦哲伦云之间和周围的观测区域(~600 deg^2),我们预计每年会发现24个SNe峰值在I<18星等以上,100个在I<19星等以上,340个在I<20星等以上。我们简要介绍了我们的在线近实时检测系统SNe和其他瞬态,OGLE瞬态检测系统。

英文摘要:

We analyze two years (mid-2010 to mid-2012) of OGLE-IV data covering ~65 deg^2 of the Magellanic Bridge (the area between the Magellanic Clouds) and find 130 transient events including 126 supernovae (SNe), two foreground dwarf novae and another two SNe-like transients that turned out to be active galactic nuclei (AGNs). We show our SNe detection efficiency as a function of SN peak magnitude based on available SNe rate estimates. It is 100% for SNe peak magnitudes I<18.8 mag and drops to 50% at I=~19.7 mag. With our current observing area between and around the Magellanic Clouds (~600 deg^2), we expect to find 24 SNe peaking above I<18 mag, 100 above I<19 mag, and 340 above I<20 mag, annually. We briefly introduce our on-line near-real-time detection system for SNe and other transients, the OGLE Transient Detection System.

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