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Reverberation Mapping of the Kepler-Field AGN KA1858+4850
Liuyi Pei, Aaron J. Barth, Greg S. Aldering +40
KA1858+4850 is a narrow-line Seyfert 1 galaxy at redshift 0.078 and is among the brightest active galaxies monitored by the Kepler mission. We have carried out a reverberation mapp…
Optical Observations of the Type Ic Supernova 2007gr in NGC 1058 and Implications for the Properties of its Progenitor
Juncheng Chen, Xiaofeng Wang, Mohan Ganeshalingam +6
We present extensive optical observations of the normal Type Ic supernova (SN) 2007gr, spanning from about one week before maximum light to more than one year thereafter. The optic…
Uncovering the Putative B-Star Binary Companion of the SN 1993J Progenitor
Ori D. Fox, K. Azalee Bostroem, Schuyler D. Van Dyk +9
The Type IIb supernova (SN) 1993J is one of only a few stripped-envelope supernovae with a progenitor star identified in pre-explosion images. SN IIb models typically invoke H enve…
Temporal Correlations Between Optical and Gamma-ray Activity in Blazars
Daniel P. Cohen, Roger W. Romani, Alexei V. Filippenko +4
We have been using the 0.76-m Katzman Automatic Imaging Telescope (KAIT) at Lick Observatory to optically monitor a sample of 157 blazars that are bright in gamma rays, being detec…
Photometric and Spectroscopic Properties of Type II-P Supernovae
Tamar Faran, Dovi Poznanski, Alexei V. Filippenko +9
We study a sample of 23 Type II Plateau supernovae (SNe II-P), all observed with the same set of instruments. Analysis of their photometric evolution confirms that their typical pl…