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Long-term evolution of the SN 2009ip-like transient SN 2016cvk
K. Matilainen, E. Kankare, S. Mattila +21
The interacting transient SN 2016cvk (ASASSN-16jt) is a member of the peculiar SN 2009ip-like events. We present our follow-up data and aim to draw conclusions about the physical n…
Luminous Red Novae: Stellar Mergers or Giant Eruptions?
A. Pastorello, E. Mason, S. Taubenberger +36
We present extensive datasets for a class of intermediate-luminosity optical transients known as "luminous red novae" (LRNe). They show double-peaked light curves, with an initial…
Photometric and Spectroscopic Properties of Type Ia Supernova 2018oh with Early Excess Emission from the 2 Observations
W. Li, X. Wang, J. Vinkó +160
Supernova (SN) 2018oh (ASASSN-18bt) is the first spectroscopically-confirmed type Ia supernova (SN Ia) observed in the field. The data revealed an excess emission…
ASASSN-18di: discovery of a flare on a mid-M dwarf
Romy Rodríguez, Sarah J. Schmidt, Tharindu Jayasinghe +9
We report and characterize a white-light superflare on a previously undiscovered M dwarf detected by the ASAS-SN survey. Employing various color-magnitude and color-spectral type r…
The Eruption of the Candidate Young Star ASASSN-15qi
Gregory J. Herczeg, Subo Dong, Benjamin J. Shappee +27
Outbursts on young stars are usually interpreted as accretion bursts caused by instabilities in the disk or the star-disk connection. However, some protostellar outbursts may not f…
Massive stars exploding in a He-rich circumstellar medium - VII. The metamorphosis of ASASSN-15ed from a narrow line Type Ibn to a normal Type Ib Supernova
A. Pastorello, J. L. Prieto, N. Elias-Rosa +39
We present the results of the spectroscopic and photometric monitoring campaign of ASASSN-15ed. The transient was discovered quite young by the All Sky Automated Survey for SuperNo…
Discovery and Observations of ASASSN-13db, an EX Lupi-Type Accretion Event on a Low-Mass T Tauri Star
Thomas W. -S. Holoien, Jose L. Prieto, Krzysztof Z. Stanek +19
We discuss ASASSN-13db, an EX Lupi-type ("EXor") accretion event on the young stellar object (YSO) SDSS J051011.01032826.2 (hereafter SDSSJ0510) discovered by the All-Sky Automa…
Characterizing a Dramatic Flare on an Ultracool Dwarf Found by the ASAS-SN Survey
Sarah J. Schmidt, Jose L. Prieto, K. Z. Stanek +19
We analyze a magnitude flare on the newly identified M8 dwarf SDSS J022116.84+194020.4 (hereafter SDSSJ0221) detected as part of the All-Sky Automated Survey for Superno…
The Rise of the Remarkable Type IIn Supernova SN 2009ip
J. L. Prieto, J. Brimacombe, A. J. Drake +1
Recent observations by Mauerhan et al. have shown the unprecedented transition of the previously identified luminous blue variable (and supernova impostor) SN 2009ip to a real Type…
Interacting Supernovae and Supernova Impostors. SN 2009ip, is this the end?
A. Pastorello, E. Cappellaro, C. Inserra +41
We report the results of a 3 year-long dedicated monitoring campaign of a restless Luminous Blue Variable (LBV) in NGC 7259. The object, named SN 2009ip, was observed photometrical…
SN 2009jf: a slow-evolving stripped-envelope core-collapse supernova
S. Valenti, M. Fraser, S. Benetti +28
We present an extensive set of photometric and spectroscopic data for SN 2009jf, a nearby Type Ib supernova, spanning from ~20 days before B-band maximum to one year after maximum.…