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Object-X: The Brightest Mid-IR Point Source in M33
Rubab Khan, K. Z. Stanek, C. S. Kochanek +1
We discuss the nature of the brightest mid-IR point source (which we dub Object X) in the nearby galaxy M33. Although multi-wavelength data on this object have existed in the liter…
The Supernova Impostor Impostor SN 1961V: Spitzer Shows That Zwicky Was Right (Again)
C. S. Kochanek, D. M. Szczygiel, K. Z. Stanek
SN 1961V, one of Zwicky's defining Type V supernovae (SN), was a peculiar transient in NGC 1058 that has variously been categorized as either a true core collapse SN leaving a blac…
A Study of Gravitational Lens Chromaticity using Ground-based Narrow Band Photometry
Ana M. Mosquera, José A. Muñoz, Evencio Mediavilla +1
We present observations of wavelength-dependent flux ratios for four gravitational lens systems (SDSS~J1650+4251, HE~04351223, FBQ 0951+2635, and Q~0142100) obtained with the…
An Alternative Approach To Measuring Reverberation Lags in Active Galactic Nuclei
Ying Zu, C. S. Kochanek, Bradley. M. Peterson
Motivated by recent progress in the statistical modeling of quasar variability, we develop a new approach to measuring emission-line reverberation lags to estimate the size of broa…
The SN 2008S Progenitor Star: Gone or Again Self-Obscured?
J. L. Prieto, D. M. Szczygiel, C. S. Kochanek +5
We obtained late-time optical and near-IR imaging of SN 2008S with the Large Binocular Telescope (LBT). We find that (1) it is again invisible at optical (UBVR) wavelengths to magn…
SDWFS-MT-1: A Self-Obscured Luminous Supernova at z~0.2
Szymon Kozlowski, C. S. Kochanek, D. Stern +22
We report the discovery of a six-month-long mid-infrared transient, SDWFS-MT-1 (aka SN 2007va), in the Spitzer Deep, Wide-Field Survey of the NOAO Deep Wide-Field Survey Bootes fie…