FIREBall (Faint Intergalactic Redshifted Emission Balloon) is a balloon borne experiment to measure emission from the intergalactic and circumgalactic medium (IGM & CGM). The narrow bandpass (~200 angstroms) allowed by the atmosphere is enough to probe three emissions lines (Lyman alpha, OVI, CIV), each at an individual redshift 0.3 < z < 1.0 . This emission has been predicted by simulations to trace warm, dense gas at the interface between galaxies and the reserve of gas and dark matter out of which the universe has formed.
FIREBall combines a 1m UV telescope (seen on the gondola in the image below on the right) with a fiber fed UV spectrograph. The image on the left is a picture from our first flight integration in 2007. More projects details and flight pictures to come soon.