Figure 3 from Green Bank Telescope Observations of Low Column Density H I around NGC 2997 and NGC 6946

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Green Bank Telescope Observations of Low Column Density H I around NGC 2997 and NGC 6946

Authors: D. J. Pisano

Pisano 2014 The Astronomical Journal 147 48.

Provider: AAS Journals

Caption: Figure 3.

GBT H i channel maps of NGC 6946, its companions, and the H i filament. Contours are at −2σ, 2σ, 3σ, 5σ, 10σ, 25σ, 50σ, 100σ, and 200σ, where σ = 8 mJy beam ⁻¹ over a 4.2 km s ⁻¹ channel. The grayscale has units of mJy/GBT beam.

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