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Discovery and Follow-up Observations of the Young Type Ia Supernova 2016coj
WeiKang Zheng, Alexei V. Filippenko, Jon Mauerhan +39
The Type~Ia supernova (SN~Ia) 2016coj in NGC 4125 (redshift ) was discovered by the Lick Observatory Supernova Search 4.9 days after the fitted first-light time (FFLT;…
Interstellar-Medium Mapping in M82 Through Light Echoes Around Supernova 2014J
Yi Yang, Lifan Wang, Dietrich Baade +10
We present multiple-epoch measurements of the size and surface brightness of the light echoes from supernova (SN) 2014J in the nearby starburst galaxy M82. Hubble Space Telescope (…
Optical and Ultraviolet Observations of the Very Young Type IIP SN 2014cx in NGC 337
Fang Huang, Xiaofeng Wang, Luca Zampieri +15
Extensive photometric and spectroscopic observations are presented for SN 2014cx, a type IIP supernova (SN) exploding in the nearby galaxy NGC 337. The observations are performed i…
The Oxygen Features in Type Ia Supernovae and the Implications for the Nature of Thermonuclear Explosions
Xulin Zhao, Keiichi Maeda, Xiaofeng Wang +6
The absorption feature O I 7773 is an important spectral indicator for type Ia supernovae (SNe~Ia) that can be used to trace the unburned material at outer layers of the exploding…
UV-Optical Observation of Type Ia Supernova SN 2013dy in NGC 7250
Qian Zhai, JuJia Zhang, XiaoFeng Wang +15
Extensive and independent observations of Type Ia supernova (SN Ia) SN 2013dy are presented, including a larger set of photometry and optical spectra from a few days before…
Optical Observations of the Type Ia Supernova 2011fe in M101 for Nearly 500 Days
Kaicheng Zhang, Xiaofeng Wang, JuJia Zhang +17
We present well-sampled optical observations of the bright Type Ia supernova (SN~Ia) SN 2011fe in M101. Our data, starting from days before maximum light and extending to…