Nathan Smith

TL;DR: In this paper, the authors present results from a warm Spitzer/IRAC survey of the positions of all 68 known SNe IIn within a distance of 250 Mpc between 1999 and 2008 that have remained unobserved by Spitzer more than 100 days post-discovery.

TL;DR: Based on the low peak luminosity for a SN of MR = −13.9 mag, photometric and spectral evolution unlike that of low-luminosity SNe, a late-time decline rate slower than 56Co decay, and slow outflow speeds of 600-1000 km s−1, the authors conclude that SN 2008S is not a true core-collapse SN and is probably not an electron-capture SN.

TL;DR: In this article, the authors show that the late-time spectrum of SN 2009ip closely resembles spectra of SN 1987A, and that the changing Hα equivalent width after explosion matches behavior typically seen in core-collapse SNe IIn.

TL;DR: A catalog of 1439 young stellar objects (YSOs) spanning the 1.42 deg^2 field surveyed by the Chandra Carina Complex Project (CCCP), which includes the major ionizing clusters and the most active sites of ongoing star formation within the Great Nebula in Carina is presented in this article.

TL;DR: In this paper, the authors report archival Hubble Space Telescope (HST) observations of its host galaxy UGC 5189A taken roughly 10 yr prior to explosion, as well as early-time optical spectra of the SN.