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8 papers · 2 filters
Nebular Spectroscopy of Kepler's Brightest Supernova
G. Dimitriadis, C. Rojas-Bravo, C. D. Kilpatrick +9
We present late-time (240-260 days after peak brightness) optical photometry and nebular (+236 and +264 days) spectroscopy of SN 2018oh, the brightest Type Ia supernova (SN I…
K2 Observations of SN 2018oh Reveal a Two-Component Rising Light Curve for a Type Ia Supernova
G. Dimitriadis, R. J. Foley, A. Rest +145
We present an exquisite, 30-min cadence Kepler (K2) light curve of the Type Ia supernova (SN Ia) 2018oh (ASASSN-18bt), starting weeks before explosion, covering the moment of explo…
Red and Reddened: Ultraviolet through Near-Infrared Observations of Type Ia Supernova 2017erp
Peter J. Brown, Griffin Hosseinzadeh, Saurabh W. Jha +20
We present space-based ultraviolet/optical photometry and spectroscopy with the Swift Ultra-Violet/Optical Telescope and Hubble Space Telescope, respectively, along with ground-bas…
Seeing Double: ASASSN-18bt Exhibits a Two-Component Rise in the Early-Time K2 Light Curve
B. J. Shappee, T. W. -s. Holoien, M. R. Drout +109
On 2018 Feb. 4.41, the All-Sky Automated Survey for SuperNovae (ASAS-SN) discovered ASASSN-18bt in the K2 Campaign 16 field. With a redshift of z=0.01098 and a peak apparent magnit…
A nearby superluminous supernova with a long pre-maximum 'plateau' and strong CII features
J. P. Anderson, P. J. Pessi, L. Dessart +63
Super-luminous supernovae (SLSNe) are rare events defined as being significantly more luminous than normal terminal stellar explosions. The source of the extra powering needed to a…
A Fast-Evolving, Luminous Transient Discovered by K2/Kepler
A. Rest, P. M. Garnavich, D. Khatami +12
For decades optical time-domain searches have been tuned to find ordinary supernovae, which rise and fall in brightness over a period of weeks. Recently, supernova searches have im…