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Methods for evaluating the performance of volume phase holographic gratings for the VIRUS spectrograph array
Taylor S. Chonis, Gary J. Hill, J. Christopher Clemens +2
The Visible Integral Field Replicable Unit Spectrograph (VIRUS) is an array of at least 150 copies of a simple, fiber-fed integral field spectrograph that will be deployed on the H…
Photometry of the Stellar Tidal Stream in the Halo of Messier 63
Taylor S. Chonis, David Martinez-Delgado, R. Jay Gabany +3
We present surface photometry of a giant, low surface brightness stellar arc in the halo of the nearby spiral galaxy M63 (NGC 5055) that is consistent with being a part of a stella…
Design and construction progress of LRS2-B: a new low resolution integral field spectrograph for the Hobby-Eberly Telescope
Taylor S. Chonis, Hanshin Lee, Gary J. Hill +3
The upcoming Wide-Field Upgrade (WFU) has ushered in a new era of instrumentation for the Hobby-Eberly Telescope (HET). Here, we present the design, construction progress, and lab…
Dwarfs Gobbling Dwarfs: A Stellar Tidal Stream Around NGC 4449 and Hierarchical Galaxy Formation on Small Scales
David Martinez-Delgado, Aaron J. Romanowsky, R. Jay GaBany +13
A candidate diffuse stellar substructure was previously reported in the halo of the nearby dwarf starburst galaxy NGC 4449 by Karachentsev et al. We map and analyze this feature us…