Society of Photo-Optical Instrumentation Engineers (SPIE)
Doi
Abstract
The Faint Intergalactic Redshifted Emission Balloon (FIREBall) is a NASA/CNES balloon-borne ultraviolet
multi-object spectrograph designed to observe the diffuse gas around galaxies (the circumgalactic medium) via
line emission redshifted to ~ 205 nm. FIREBall uses a ultraviolet-optimized delta doped e2v CCD201 with a
custom designed high efficiency five layer anti-re
ection coating. This combination achieves very high quantum
efficiency (QE) and photon-counting capability, a first for a CCD detector in this wavelength range. We also present new work on red blocking mirror coatings to reduce red leak
