CLEARHST

CLEAR is a Cycle 23 survey with the Hubble Space Telescope using the IR grisms to study the spectroscopic features of galaxies. See below for more details.

These webpages allow visual exploration of the fields, and access to the data (TBD), and summaries of publications.

Click on image to go to field.

GOODS North GOODS South
Made by Rosalia O'Brien

About CLEAR:

CLEAR is the CANDELS Lyman-α Emission at Reionization survey. It is a Cycle 23 program with the Hubble Space Telescope (PID: 14227, principal investigator Casey Papovich). It uses 130 orbits to obtain deep exposures in 12 fields (12 orbits per field) with the WFC3 G102 grism in the CANDELS GOODS-N and GOODS-S fields (see images below). This produces slitless spectroscopic coverage of objects over wavelengths 0.8-1.2 micron (and combined with the WFC3 G141 coverage from 3DHST, extends this coverage to 1.7 micron). The main science goal of CLEAR is to constrain the evolution of frequency of galaxies with strong Lyman-α emission in the early universe (redshifts z > 6) moving into the Epoch of Reionization. In addition the spectroscopic coverage provides Hubble Space Telescope spatial resolution at near-Infrared wavelengths from space, which allows studies of the stellar populations, star-formation, ionization, and chemical enrichment of galaxies in the distant universe (from redshifts z~0.5 to 3 and beyond).

CLEAR is supported by HST-GO-14227 awarded by the Space Telescope Science Institute.

When using data from CLEAR, please include the following acknowledgement: "This work is based on data obtained for the CLEAR program (GO-14227) by the NASA/ESA Hubble Space Telescope, which is operated by the Association of Universities for Research in Astronomy, Incorporated, under NASA contract NAS5- 26555."