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Weather on Other Worlds. V. The Three Most Rapidly Rotating Ultra-Cool Dwarfs
Megan E. Tannock, Stanimir Metchev, Aren Heinze +7
We present the discovery of rapid photometric variability in three ultra-cool dwarfs from long-duration monitoring with the Spitzer Space Telescope. The T7, L3.5, and L8 dwarfs hav…
Beyond Gaia: Asteroseismic Distances of M giants using Ground-Based Transient Surveys
Connor Auge, Daniel Huber, Aren Heinze +14
Evolved stars near the tip of the red giant branch (TRGB) show solar-like oscillations with periods spanning hours to months and amplitudes ranging from 1 mmag to 100 m…
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…
SN 2017ens: The Metamorphosis of a Luminous Broad-lined Type Ic Supernova into an SN IIn
T. -W. Chen, C. Inserra, M. Fraser +46
We present observations of supernova (SN) 2017ens, discovered by the ATLAS survey and identified as a hot blue object through the GREAT program. The redshift z=0.1086 implies a pea…
A First Catalog of Variable Stars Measured by the Asteroid Terrestrial-impact Last Alert System (ATLAS)
A. N. Heinze, John L. Tonry, Larry Denneau +6
The Asteroid Terrestrial-impact Last Alert System (ATLAS) carries out its primary planetary defense mission by surveying about 13000 deg^2 at least four times per night. The result…
Characterizing The Cloud Decks of Luhman 16AB with Medium-Resolution Spectroscopic Monitoring
Kendra Kellogg, Stanimir Metchev, Aren Heinze +2
We present results from a two-night R~4000 0.9-2.5 micron spectroscopic monitoring campaign of Luhman 16AB (L7.5 + T0.5). We assess the variability amplitude as a function of press…