Far-UV HST Spectroscopy of an Unusual Hydrogen-poor Superluminous Supernova: SN2017egm

@article{Yan2017FarUVHS,
  title={Far-UV HST Spectroscopy of an Unusual Hydrogen-poor Superluminous Supernova: SN2017egm},
  author={Lin Yan and Daniel A. Perley and Annalisa De Cia and Robert M. Quimby and Ragnhild Lunnan and Kate H. R. Rubin and Peter. J. Brown},
  journal={The Astrophysical Journal},
  year={2017},
  volume={858}
}
SN2017egm is the closest (z = 0.03) H-poor superluminous supernova (SLSN-I) detected to date, and a rare example of an SLSN-I in a massive, metal-rich galaxy. We present the HST UV and optical spectra covering 1000–5500 Å, taken at +3 day relative to the peak. Our data reveal two absorption systems at redshifts matching the host galaxy NGC 3191 (z = 0.0307) and its companion galaxy (z = 0.0299) 73″ apart. Weakly damped Lyα absorption lines are detected at these two redshifts, with H i column… 

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