Dating individual quasars with the He II proximity effect
Early and Extended Helium Reionization over More Than 600 Million Years of Cosmic Time
Helium Reionization Simulations. III. The Helium Lya Forest
Statistical Detection of the He II Transverse Proximity Effect: Evidence for Sustained Quasar Activity for >25 Million Years
The End of Helium Reionization at z ~= 2.7 Inferred from Cosmic Variance in HST/COS He II Lya Absorption Spectra
The Evolution of the He II-ionizing Background at Redshifts 2.3 < z < 3.8 Inferred from a Statistical Sample of 24 HST/COS He II Lya Absorption Spectra
Instrument
COS, COS/FUV, COS/NUV
Temporal Coverage
2010-01-02T15:12:18Z/2011-01-28T12:27:08Z
Version
1.0
Mission Description
Launched in 1990, the NASA/ESA Hubble Space Telescope remains the premier UV and visible light telescope in orbit. With well over 1.6 million observations from 10 different scientific instruments, the ESA Hubble Science Archive is a treasure trove of astronomical data to be exploited.
European Space Agency, Worseck comma Gabor, 2012, 'Probing HeII Reionization with GALEX-selected Quasar Sightlines and HST/COS', 1.0, European Space Agency, https://doi.org/10.5270/esa-bw03lo0