Photometry of SN 2013gh and iPTF13dge

Temporal variability of narrow absorption lines in high-resolution spectra of Type Ia supernovae (SNe Ia) is studied to search for circumstellar matter. Time series which...本研究针对Ia型超新星（SNe Ia）的高分辨率光谱中的窄吸收线的时间变异性展开分析，以搜寻星周物质。所用的时间序列（Time series）……