0 Assigned ID: 315 ----- Attempting Submission 1 (Thu Apr 07 23:02:52 GMT 2016) ----- HST Phase I Proposal 315 (wga.apt) successfully submitted. Receipt: # 315-1 ----- Attempting Submission 2 (Fri Apr 08 20:39:51 GMT 2016) ----- The HST archive contains roughly 0.7 square degrees of coverage with the WFC3/IR grism elements, providing low spectral resolution / high spatial resolution slitless spectroscopy over the range 0.8--1.7 microns. The archive represents a heterogeneous mix of large, uniform programs and a variety of smaller programs focusing on more specifically selected targets such as galaxy overdensities and fields around distant quasars. Only the 3D-HST spectra---representing just 20% of the archival holdings in just the redder G141 grism---have been fully processed systematically and automatically. Here we propose the "Grizli" project to democratize access to WFC3/IR slitless spectroscopy and provide uniform processing, redshift and emission line measurements of the full WFC3 G102+G141 spectral archive. Novel benefits of the Grizli processing include 1) Increasing the areal coverage of catalogued redshift and line measurements by a factor of five, 2) Providing reduced spectra and simultaneous fits derived from both WFC3/IR grisms, and 3) Combining spectra in deep areas observed at multiple position angles. The uniform processing of the grism archive and rest-frame optical spectra for galaxies at 0.2 < z < 3.5 will enable myriad scientific applications of the rich dataset. Among them we will focus on constraining the dust extinction towards HII regions in distant star-forming galaxies and determining robust emission line luminosity functions to help inform planning of future space-based cosmology missions such as WFIRST. All Legacy data products and the software tools used to generate them will be made freely available through the Hubble Legacy Archive. Galaxies 0 Legacy false false false SUPPORTED