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Multi-Wavelength Observations of Supernova 2011ei: Time-Dependent Classification of Type IIb and Ib Supernovae and Implications for their Progenitors
D. Milisavljevic, R. Margutti, A. M. Soderberg +39
We present X-ray, UV/optical, and radio observations of the stripped-envelope, core-collapse supernova (SN) 2011ei, one of the least luminous SNe IIb or Ib observed to date. Our ob…
A New Extensive Library of Synthetic Stellar Spectra from PHOENIX Atmospheres and its Application to Fitting VLT MUSE Spectra
T. -O. Husser, S. Kamann, S. Dreizler +1
We present a new library of synthetic spectra based on the stellar atmosphere code PHOENIX. It covers the wavelength range from 500Å to 55000Å with a resolution of R=500000 in the…
The quest for companions to post-common envelope binaries. II. NSVS14256825 and HS0705+6700
K. Beuermann, P. Breitenstein, B. Debski +20
We report new mid-eclipse times of the two close binaries NSVS14256825 and HS0705+6700, harboring an sdB primary and a low-mass main-sequence secondary. Both objects display clear…
Discovery of two new Galactic candidate luminous blue variables with WISE
V. V. Gvaramadze, A. Y. Kniazev, A. S. Miroshnichenko +28
We report the discovery of two new Galactic candidate luminous blue variable (cLBV) stars via detection of circular shells (typical of known confirmed and cLBVs) and follow-up spec…
The quest for companions to post-common envelope binaries: I. Searching a sample of stars from the CSS and SDSS
U. Backhaus, S. Bauer, K. Beuermann +39
As part of an ongoing collaboration between student groups at high schools and professional astronomers, we have searched for the presence of circum-binary planets in a bona-fide u…