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Optical turbulence characterization at the SAAO Sutherland site
Laure Catala, Steven M. Crawford, David A. H. Buckley +7
We present results from the first year of a campaign to characterize and monitor the optical turbulence profile at the SAAO Sutherland observing station in South Africa. A MASS-DIM…
Multi-site photometric campaign on the high amplitude δ Scuti star KIC 6382916
C. Ulusoy, B. Ulaş, T. Gülmez +15
We present results of a multi-site photometric campaign on the high-amplitude \,Scuti star KIC\,6382916 in the {\it Kepler} field. The star was observed over a 85-d interval at…
Characterization of the Nearby L/T Binary Brown Dwarf WISE J104915.57-531906.1 at 2 Parsecs from the Sun
A. Y. Kniazev, P. Vaisanen, K. Muzic +22
WISE J104915.57531906.1 is a L/T brown dwarf binary located 2pc from the Sun. The pair contains the closest known brown dwarfs and is the third closest known system, stellar or…
Spectroscopic Observations of SN 2012fr: A Luminous Normal Type Ia Supernova with Early High Velocity Features and Late Velocity Plateau
M. J. Childress, R. A. Scalzo, S. A. Sim +55
We present 65 optical spectra of the Type Ia supernova SN 2012fr, of which 33 were obtained before maximum light. At early times SN 2012fr shows clear evidence of a high-velocity f…
Abell 48 - a rare WN-type central star of a planetary nebula
H. Todt, A. Y. Kniazev, V. V. Gvaramadze +18
A considerable fraction of the central stars of planetary nebulae (CSPNe) are hydrogen-deficient. Almost all of these H-deficient central stars (CSs) display spectra with strong ca…