Type Ia SN 2020nlb opt. photometry & spectra

VizieR online Data Catalogue associated with article published in journal Astronomical Journal (AAS) with title 'Circumstellar medium constraints on the environment of two nearby type Ia supernovae: SN 2017cbv and SN 2020nlb.' (bibcode: 2021ApJ...922...21S)本数据集为与发表于《天文期刊》（AAS）的论文相关联的VizieR在线数据目录，该论文标题为《星周介质对两颗近邻Ia型超新星SN 2017cbv与SN 2020nlb所处环境的约束》，其文献标识号（bibcode）为2021ApJ...922...21S。