Late Light Curves of Normal Type Ia Supernovae
Late Light Curves of Normal Type Ia Supernovae
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DOI：
10.1086/508322
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发表时间：
2006-10
期刊：
影响因子：
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通讯作者：
J. Lair;M. Leising;P. Milne;G. Williams
中科院分区：
文献类型：
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作者：
J. Lair;M. Leising;P. Milne;G. Williams
本文介绍了七颗Ia型超新星：SN2000E、SN2000Ce、SN2000cx、SN2001C、SN2001V、SN2001bg和SN2001dp的晚期光学光度测量(BVRI)。这些物体的测光是用模板减法获得的，以消除孔径测光过程中星系光的污染。我们展示了这些超新星在超新星爆发后长达640天的时间段(∼)的光学曲线。我们发现这些数据在爆炸后200-500天期间呈线性下降，B、V和R波段的衰减率约为每100天1.4毫克，而I波段的衰减率要浅得多，为每100天0.94毫克。
We present late-epoch optical photometry (BVRI) of seven normally luminous and superluminous Type Ia supernovae: SN 2000E, SN 2000ce, SN 2000cx, SN 2001C, SN 2001V, SN 2001bg, and SN 2001dp. The photometry of these objects was obtained using a template subtraction method to eliminate galaxy light contamination during aperture photometry. We show the optical light curves of these supernovae out to epochs of up to ∼640 days after the explosion of the supernova. We show a linear decline in these data during the epoch of 200-500 days after explosion, with the decline rate in the B, V, and R bands equal to about 1.4 mag per 100 days, but the decline rate of the I-band is much shallower at 0.94 mag per 100 days.