A dataset provided by the European Space Agency

Name 13875
Title A Potential Paradigm Shift in our Understanding of Helium Reionization
URL https://hst.esac.esa.int/ehst/#/pages/search;proposal=13875;TAPCLIENT=DOI
DOI https://doi.org/10.5270/esa-wf4h9z3
Author Worseck
Description This is a scientific proposal for HST mission. For specific information please visit https://archive.stsci.edu/proposal_search.php?id=13875&mission=hst
Publication
  • Dating individual quasars with the He II proximity effect
  • Evidence for short ~ 1 Myr lifetimes from the He II proximity zones of z ~ 4 quasars
  • 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
  • The first measurement of the quasar lifetime distribution
Instrument COS, COS/FUV, COS/NUV
Temporal Coverage 2015-08-28T03:13:56Z/2015-11-11T01:32:23Z
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.
Creator Contact https://support.cosmos.esa.int/esdc/index.php?/Tickets/Submit
Date Published 2016-11-12T15:56:33Z
Last Update 2026-07-09
Keywords Hubble Space Telescope data, HST observations dataset, NASA ESA Hubble mission data, space-based optical imaging data, ultraviolet astronomy observations, near-infrared imaging dataset, Hubble spectroscopy data, Wide Field Camera 3 WFC3 data, Advanced Camera for Surveys ACS data, Space Telescope Imaging Spectrograph STIS data, Cosmic Origins Spectrograph COS data, Hubble deep field imaging dataset, extragalactic survey observations, galaxy evolution imaging data, star formation observations HST, stellar photometry dataset, globular cluster imaging data, supernova Hubble observations, exoplanet transit HST data, interstellar medium spectroscopy data, calibrated level 2 HST data products, drizzled image mosaics, FITS files astronomy, flux-calibrated spectra, photometric time-series Hubble data, redshift measurements dataset, Hubble Legacy Archive data, Mikulski Archive for Space Telescopes MAST dataset
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Worseck, 2016, 'A Potential Paradigm Shift in our Understanding of Helium Reionization', 1.0, European Space Agency, https://doi.org/10.5270/esa-wf4h9z3
Rights Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license.