Imaging spectrograph for interstellar shocks: a narrowband imaging payload for the far ultraviolet

Area of Science:

• Astronomy and Astrophysics
• Plasma Physics
• Optical Engineering

Background:

• Supernova remnants (SNRs) contain hot plasma (approx. 300,000 K) generated by shock waves.
• Mapping the distribution of UV-emitting material in these plasmas is crucial for understanding shock dynamics.
• Existing instruments may have limitations in spatial resolution or spectral range for detailed SNR studies.

Purpose of the Study:

• To present a novel imaging spectrometer for narrowband imaging at 1035 Angstroms.
• To achieve high spatial resolution (approx. 1 arc-sec) for detailed mapping of UV-emitting material.
• To enable the study of hot plasma in supernova remnants.

Main Methods:

• Development of a Gregorian telescope-based imaging spectrometer.
• Incorporation of aberration-corrected holographic rulings on the secondary optic.
• Design optimized for stigmatic imaging with high system efficiency.

Main Results:

• The instrument achieves approximately 1-arc sec spatial resolution over a 5-arc min field of view.
• Enables mapping of UV-emitting material in hot plasma from supernova remnant shocks.
• Demonstrates high system efficiency due to a minimal number of optical elements.

Conclusions:

• The developed imaging spectrometer is effective for high-resolution UV imaging of astrophysical phenomena.
• The instrument's design is adaptable for various wavelengths and imaging spectroscopy modes.
• It provides a valuable tool for investigating the physical conditions within supernova remnants.