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GRAPES, grism spectroscopy of the Hubble ultra deep field: Description and data reduction

  • N. Pirzkal*
  • , C. Xu
  • , S. Malhotra
  • , J. E. Rhoads
  • , A. M. Koekemoer
  • , L. A. Moustakas
  • , J. R. Walsh
  • , R. A. Windhorst
  • , E. Daddi
  • , A. Cimatti
  • , H. C. Ferguson
  • , Jonathan P. Gardner
  • , C. Gronwall
  • , Z. Haiman
  • , M. Kümmel
  • , N. Panagia
  • , A. Pasquali
  • , M. Stiavelli
  • , S. Di Serego Alighieri
  • , Z. Tsvetanov
  • J. Vernet, H. Yan
*Corresponding author for this work
  • Space Telescope Science Institute
  • European Southern Observatory
  • Arizona State University
  • Osservatorio Astrofisico Di Arcetri, Florence
  • NASA Goddard Space Flight Center
  • Pennsylvania State University
  • Columbia University
  • Swiss Federal Institute of Technology Zurich
  • Johns Hopkins University
  • National Aeronautics and Space Administration
  • California Institute of Technology

Research output: Contribution to journalReview articlepeer-review

Abstract

We present deep unbiased spectroscopy of the Hubble Ultra Deep Field (UDF) carried out using the slitless grism spectroscopy mode of the Advanced 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 s) 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 low-luminosity active galactic nuclei in an unbiased fashion. This paper describes in detail the observations and the data reduction and examines the quality of the extracted spectra. Subsequent papers will deal with the analysis of the data. The extracted and calibrated GRAPES spectra will be available from MAST at STScI.

Original languageEnglish
Pages (from-to)501-508
Number of pages8
JournalAstrophysical Journal, Supplement Series
Volume154
Issue number2
DOIs
Publication statusPublished - Oct 2004
Externally publishedYes

Keywords

  • Galaxies: high-redshift
  • Surveys
  • Techniques: spectroscopic

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