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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…
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…
The Foundation Supernova Survey: Measuring Cosmological Parameters with Supernovae from a Single Telescope
D. O. Jones, D. M. Scolnic, R. J. Foley +27
Measurements of the dark energy equation-of-state parameter, , have been limited by uncertainty in the selection effects and photometric calibration of Type Ia supernova…
The first 48: Discovery and progenitor constraints on the Type Ia supernova 2013gy
S. Holmbo, M. D. Stritzinger, B. J. Shappee +26
We present an early-phase -band light curve and visual-wavelength spectra of the normal Type Ia supernova (SN) 2013gy. The light curve is constructed by determining the appropri…
ASASSN-18ey: The Rise of a New Black-Hole X-ray Binary
M. A. Tucker, B. J. Shappee, T. W. -S. Holoien +21
We present the discovery of ASASSN-18ey (MAXI J1820+070), a new black hole low-mass X-ray binary discovered by the All-Sky Automated Survey for SuperNovae (ASAS-SN). A week after A…
The lowest metallicity type II supernova from the highest mass red-supergiant progenitor
J. P. Anderson, L. Dessart, C. P. Gutiérrez +29
Red supergiants have been confirmed as the progenitor stars of the majority of hydrogen-rich type II supernovae. However, while such stars are observed with masses >25M, de…