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The Berkeley Sample of Stripped-Envelope Supernovae
Isaac Shivvers, Alexei V. Filippenko, Jeffrey M. Silverman +22
We present the complete sample of stripped-envelope supernova (SN) spectra observed by the Lick Observatory Supernova Search (LOSS) collaboration over the last three decades: 888 s…
The Lick AGN Monitoring Project 2011: Dynamical Modeling of the Broad-Line Region
Peter R. Williams, Anna Pancoast, Tommaso Treu +22
We present models of the H-emitting broad-line region (BLR) in seven Seyfert 1 galaxies from the Lick AGN (Active Galactic Nucleus) Monitoring Project 2011 sample, drawing infer…
Some Bright Stars with Smooth Continua for Calibrating the Response of High Resolution Spectrographs
Kelsey Clubb, Andrew W. Howard, Howard Isaacson +2
When characterizing a high resolution echelle spectrograph, for instance for precise Doppler work, it is useful to observe featureless sources such as quartz lamps or hot stars to…
Oxygen and helium in stripped-envelope supernovae
C. Fremling, J. Sollerman, M. M. Kasliwal +23
We present an analysis of 507 spectra of 173 stripped-envelope (SE) supernovae (SNe) discovered by the untargeted Palomar Transient Factory (PTF) and intermediate PTF (iPTF) survey…
Stripped-envelope supernova SN 2004dk is now interacting with hydrogen-rich circumstellar material
Jon C. Mauerhan, Alexei V. Filippenko, Weikang Zheng +4
The dominant mechanism and time scales over which stripped-envelope supernovae (SNe) progenitor stars shed their hydrogen envelopes are uncertain. Observations of Type Ib and Ic SN…
Stability of the Broad Line Region Geometry and Dynamics in Arp 151 Over Seven Years
A. Pancoast, A. J. Barth, K. Horne +24
The Seyfert 1 galaxy Arp 151 was monitored as part of three reverberation mapping campaigns spanning . We present modeling of these velocity-resolved reverberation mappi…
New Parallaxes of Galactic Cepheids from Spatially Scanning the Hubble Space Telescope: Implications for the Hubble Constant
Adam G. Riess, Stefano Casertano, Wenlong Yuan +8
We present new parallax measurements of 7 long-period (> 10 days) Milky Way Cepheids (SS CMa, XY Car, VY Car, VX Per, WZ Sgr, X Pup and S Vul) using astrometry from spatial scannin…
SN2013fs and SN2013fr: Exploring the circumstellar-material diversity in Type II supernovae
Christopher Bullivant, Nathan Smith, G. Grant Williams +12
We present photometry and spectroscopy of SN2013fs and SN2013fr in the first 100 days post-explosion. Both objects showed transient, relatively narrow H emission lines character…