SAO RAS中远距离核心坍缩超新星的光谱和光度监测
Spectral and Photometric Monitoring of Distant Core-Collapse Supernovae in the SAO RAS
摘要：
本文介绍了研究红移z <0.3的远距离核心坍缩超新星（SNe）的观测计划的目的、目标和初步结果。这项工作是在俄罗斯科学院特殊天体物理观测台6米BTA望远镜和其他望远镜监测超新星的国际合作方案框架内进行的。我们研究的早期阶段的事件（SN类型的确定，红移估计，并寻找风包络的表现），和星云阶段（爆炸不对称的影响）。与宇宙伽马射线暴有关的SNe特别令人感兴趣。我们的观测数据的解释与其他望远镜上获得的数据一起被用来测试SN爆炸和周围的星周介质的现有理论模型。2009年，我们观测了30个天体;获得了其中12个天体的光谱。我们确定了5个SNe（SN 2009db，SN 2009dy，SN 2009dw，SN 2009ew，SN 2009ji）的类型、极大值后的相位和红移。根据获得的测光数据，又发现了另外两颗超新星（SN 2009bx和SN 2009cb）。对星云阶段的两颗II型超新星（SN 2008gz和SN 2008in）的研究已经完成，目前还有四颗天体（SN 2008iy、SN 2009ay、SN 2009bw、SN 2009de）受到监测。
英文摘要：
This paper describes the aims, objectives and first results of the observational program for the study of distant core-collapse supernovae (SNe) with redshifts z < 0.3. This work is done within the framework of an international cooperation program on the SNe monitoring at the 6-m BTA telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences, and other telescopes. We study both the early phases of events (SN type determination, redshift estimation, and a search for manifestations of a wind envelope), and the nebular phase (the effects of explosion asymmetry). The SNe, associated with cosmic gamma-ray bursts are of particular interest. An interpretation of our observational data along with the data obtained on other telescopes is used to test the existing theoretical models of both the SN explosion, and the surrounding circumstellar medium. In 2009 we observed 30 objects; the spectra were obtained for 12 of them. We determined the types, phases after maximum, and redshifts for five SNe (SN 2009db, SN 2009dy, SN 2009dw, SN 2009ew, SN 2009ji). Based on the obtained photometric data a discovery of two more SNe was confirmed (SN 2009bx and SN 2009cb). A study of two type II supernovae in the nebular phase (SN 2008gz and SN 2008in) is finalized, four more objects (SN 2008iy, SN 2009ay, SN 2009bw, SN 2009de) are currently monitored.
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