Abstract

We present photometric and spectrocsopic observations of SN2018zd, carried out at 9 telescopes, including the 6-m telescope of SAO RAN and the 2.5-m telescope of the Caucasus Mountain Observatory of the Sternberg Astronomical Institute. The dates and magnitudes of maximum brightness and the parameters of the light curves were determined. The photometric characteristics of SN2018zd allow to classify it as a transition event between SNe II-P and SNe II-L. The peculiar features of SN2018zd are sufficiently bright maximum luminosity M_V = \( - 18_{{\text{.}}}^{{\text{m}}}0,\) combined with low expansion velocity, large interval between maximum light and the start of exponential tail, slow reddening of colors (U − B), (B − V) after maximum light.

中文翻译：

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超新星 SN 2018zd 的观测

摘要

我们展示了 SN2018zd 的光度和光谱观测，这些观测是在 9 台望远镜上进行的，包括 SAO RAN 的 6 米望远镜和斯腾伯格天文研究所高加索山天文台的 2.5 米望远镜。确定了最大亮度的日期和大小以及光变曲线的参数。SN2018zd 的光度特征允许将其归类为 SNe II-P 和 SNe II-L 之间的过渡事件。SN2018zd 的独特特征是足够亮的最大光度M _V = \( - 18_{{\text{.}}}^{{\text{m}}}0,\) 结合低膨胀速度，最大光度间隔大光和指数尾巴的开始，颜色缓慢变红 ( U − B ), (B − V ) 最大光照后。