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GRAPES, Grism Spectroscopy of the Hubble Ultra Deep Field: Description and Data Reduction

2004; Institute of Physics; Volume: 154; Issue: 2 Linguagem: Inglês

10.1086/422582

1538-4365

N. Pirzkal, C. Xu, Sangeeta Malhotra, James E. Rhoads, Anton M. Koekemoer, Leonidas A. Moustakas, J. R. Walsh, Rogier A. Windhorst, E. Daddi, A. Cimatti, Henry C. Ferguson, Jonathan P. Gardner, C. Gronwall, Zoltàn Haiman, M. Kümmel, N. Panagia, A. Pasquali, M. Stiavelli, S. di Serego Alighieri, Z. Tsvetanov, J. Vernet, Haojing Yan,

Gamma-ray bursts and supernovae

We present deep unbiased spectroscopy of the Hubble Ultra Deep Field (UDF) carried out using the slitless grism spectroscopy mode of the Advance Camera for Surveys on the Hubble Space Telescope (HST).The GRIsm ACS Program for Extragalactic Science (GRAPES) achieves continuum detection as faint as z AB = 27.2 using 40 orbits (9.2 × 10 4 seconds) on HST.The data were taken at four orientation angles to correct for the overlap of spectra.GRAPES data provide a unique, uninterrupted, low resolution (R=100) spectral coverage for 5500 Å < λ < 10500 Å, and allow us to detect high redshift galaxies at 4 < z < 7 whether they have Lyα lines or just show the Lyman Break, as well as find