Grism-ACS Program for Extragalactic Science ("GRAPES")

GRAPES is a project which was conducted in the Hubble Ultra-Deep Field (HUDF) during HST Cycle 12, over the period 2004 September to 2005 January. Sangeeta Malhotra is the PI for proposal 9793 for which 40 orbits were allocated. Slitless spectra in the Ultra-Deep Field were obtained with the Advanced Camera for Surveys (ACS) with the Wide Field Camera (WFC) over the field of 204x204 arcsec. The G800L grism provides slitless spectra with a dispersion of about 40 Angstroms per pixel. The release constitutes 1400 1D extracted spectra from the GRAPES dataset that were selected to have i < 27.0 mag.