The 2012 rise of the remarkable type IIn SN 2009ip

Prieto, José L., Brimacombe, J., Drake, A.J., and Howerton, S. (2013) The 2012 rise of the remarkable type IIn SN 2009ip. Astrophysical Journal Letters, 763 (2). L27. pp. 1-5.

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Abstract

Recent observations by Mauerhan et al. have shown the unprecedented transition of the previously identified luminous blue variable (LBV) and supernova (SN) impostor SN 2009ip to a real Type IIn SN explosion. We present ~100 optical R- and I-band photometric measurements of SN 2009ip obtained between UT 2012 September 23.6 and October 9.6, using 0.3-0.4 m aperture telescopes from the Coral Towers Observatory in Cairns, Australia. The light curves show well-defined phases, including very rapid brightening early on (0.5 mag in 6 hr observed during the night of September 24), a transition to a much slower rise between September 25 and September 28, and a plateau/peak around October 7. These changes are coincident with the reported spectroscopic changes that most likely mark the start of a strong interaction between the fast SN ejecta and a dense circumstellar medium formed during the LBV eruptions observed in recent years. In the 16-day observing period, SN 2009ip brightened by 3.7 mag from I = 17.4 mag on September 23.6 (MI sime –14.2) to I = 13.7 mag (MI sime –17.9) on October 9.6, radiating ~3 × 1049 erg in the optical wavelength range. As of 2012 October 9.6, SN 2009ip is more luminous than most Type IIP SN and comparable to other Type IIn SN.

Item ID: 32908
Item Type: Article (Research - C1)
ISSN: 2041-8213
Keywords: circumstellar matter, stars: evolution, stars: mass-loss, supernovae: individual (SN 2009ip)
Funders: Carnegie-Princeton Fellowship
Date Deposited: 30 Apr 2014 09:53
FoR Codes: 02 PHYSICAL SCIENCES > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970102 Expanding Knowledge in the Physical Sciences @ 100%
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