Nebular Supernovae

Late-time supernova spectroscopy is one of the cleanest uses of Keck aperture: faint, single-object, line-driven science where broad wavelength coverage and decent calibration save real observing time.

Suggested seed figure: a nebular supernova spectrum with labeled diagnostic lines and a model comparison.

Why ZShooter

• The targets are faint enough that throughput still rules.

• Optical+NIR lines belong together.

• Absolute scaling and repeatability matter for comparing to models.

Current design pressure

This case keeps pressure on sensitivity, calibration, and keeping a straightforward observer workflow for long integrations.

Build-out notes

• Add one public-safe note on line-luminosity calibration needs.