The 3D-HST survey: Hubble Space Telescope WFC3/G141 GRISM spectra, Redshifts, and emission line measurements for ∼100,000 galaxies

Journal Article · Mon Aug 01 00:00:00 EDT 2016 · Astrophysical Journal, Supplement Series

DOI:https://doi.org/10.3847/0067-0049/225/2/27· OSTI ID:22872483

Momcheva, Ivelina G.; Van Dokkum, Pieter G.; Skelton, Rosalind E.; Nelson, Erica J.; Leja, Joel; Dickey, Claire; Lange, Johannes Ulf ^[1]; Brammer, Gabriel B. ^[2]; Whitaker, Katherine E. ^[3]; Fumagalli, Mattia; Franx, Marijn; Labbé, Ivo ^[4]; Maseda, Michael V.; Rix, Hans-Walter ^[5]; Bezanson, Rachel ^[6]; Cunha, Elisabete Da ^[7]; Schreiber, Natascha M. Förster ^[8]; Illingworth, Garth ^[9]; Kriek, Mariska ^[10]; others, and

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1. Department of Astronomy, Yale University, 260 Whitney Avenue, New Haven, CT 06511 (United States)
2. Space Telescope Science Institute, Baltimore, MD 21218 (United States)
3. Department of Astronomy, University of Massachusetts, Amherst, MA 01003 (United States)
4. Leiden Observatory, Leiden University, Leiden (Netherlands)
5. Max Planck Institute for Astronomy, D-69117, Heidelberg (Germany)
6. Steward Observatory, University of Arizona, Tucson, AZ 85721 (United States)
7. Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, VIC 3122 (Australia)
8. Max-Planck-Institut für extraterrestrische Physik, Garching (Germany)
9. Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA (United States)
10. Astronomy Department, University of California, Berkeley, CA 94720 (United States)

We present reduced data and data products from the 3D-HST survey, a 248-orbit HST Treasury program. The survey obtained WFC3 G141 grism spectroscopy in four of the five CANDELS fields: AEGIS, COSMOS, GOODS-S, and UDS, along with WFC3 H {sub 140} imaging, parallel ACS G800L spectroscopy, and parallel I {sub 814} imaging. In a previous paper, we presented photometric catalogs in these four fields and in GOODS-N, the fifth CANDELS field. Here we describe and present the WFC3 G141 spectroscopic data, again augmented with data from GO-1600 in GOODS-N (PI: B. Weiner). We developed software to automatically and optimally extract interlaced two-dimensional (2D) and one-dimensional (1D) spectra for all objects in the Skelton et al. (2014) photometric catalogs. The 2D spectra and the multi-band photometry were fit simultaneously to determine redshifts and emission line strengths, taking the morphology of the galaxies explicitly into account. The resulting catalog has redshifts and line strengths (where available) for 22,548 unique objects down to JH{sub IR}⩽24 (79,609 unique objects down to JH{sub IR}⩽26). Of these, 5459 galaxies are at z>1.5 and 9621 are at 0.7<1.5, where Hα falls in the G141 wavelength coverage. The typical redshift error for JH{sub IR}⩽24 galaxies is σ{sub z}≈0.003×(1+z), i.e., one native WFC3 pixel. The 3σ limit for emission line fluxes of point sources is 2.1×10{sup −17} erg s{sup −1} cm{sup −2}. All 2D and 1D spectra, as well as redshifts, line fluxes, and other derived parameters, are publicly available.{sup 18}.

• OSTI ID: 22872483
• Journal Information: Astrophysical Journal, Supplement Series, Vol. 225, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0067-0049
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
CATALOGS
COMPUTER CODES
DATA ANALYSIS
GALAXIES
MORPHOLOGY
ONE-DIMENSIONAL CALCULATIONS
ORBITS
PHOTOMETRY
RED SHIFT
SPECTROSCOPY
TELESCOPES
TWO-DIMENSIONAL CALCULATIONS
WAVELENGTHS