A Panchromatic View of the Restless SN 2009ip Reveals the Explosive Ejection of a Massive Star Envelope

  title={A Panchromatic View of the Restless SN 2009ip Reveals the Explosive Ejection of a Massive Star Envelope},
  author={Raffaella Margutti and Dan Milisavljevic and Alicia Margarita Soderberg and Ryan Chornock and B. Ashley Zauderer and Kiyoka Murase and Cristiano Guidorzi and Nathan Edward Sanders and P Kuin and Claes Fransson and Emily M. Levesque and Poonam Chandra and Edo Berger and Federica B. Bianco and Peter. J. Brown and Peter J. Challis and Emmanouil Chatzopoulos and C. C. Cheung and C. Choi and Laura Chomiuk and Nikolai N. Chugai and C Contreras and Maria R. Drout and Robert A. Fesen and Ryan J. Foley and Wen-fai Fong and Andrew S. Friedman and C. Gall and Neil Gehrels and Jens Hjorth and Eric Y. Hsiao and Robert P. Kirshner and Myungshin Im and Giorgos Leloudas and Ragnhild Lunnan and G. H. Marion and J Mart{\'i}n and Nidia I. Morrell and Kathryn F. Neugent and Nicola Omodei and Mark M. Phillips and Armin Rest and Jeffrey M Silverman and Jay Strader and Maximilian D. Stritzinger and Tam{\'a}s Szalai and N. B. Utterback and J{\'o}zsef Vink{\'o} and J. Craig Wheeler and David C. Arnett and Simone Campana and Roger A. Chevalier and Adam Ginsburg and Atish Kamble and P. W. A. Roming and Tyler Pritchard and Guy S. Stringfellow},
  journal={The Astrophysical Journal},
The double explosion of SN 2009ip in 2012 raises questions about our understanding of the late stages of massive star evolution. Here we present a comprehensive study of SN 2009ip during its remarkable rebrightenings. High-cadence photometric and spectroscopic observations from the GeV to the radio band obtained from a variety of ground-based and space facilities (including the Very Large Array, Swift, Fermi, Hubble Space Telescope, and XMM) constrain SN 2009ip to be a low energy (E similar to… 
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