Science-advisor
REGISTER info/FAQ
Login
username
password
     
forgot password?
register here
 
Research articles
  search articles
  reviews guidelines
  reviews
  articles index
My Pages
my alerts
  my messages
  my reviews
  my favorites
 
 
Stat
Members: 3643
Articles: 2'487'895
Articles rated: 2609

28 March 2024
 
  » arxiv » 1510.2106

 Article overview


The 3D-HST Survey: Hubble Space Telescope WFC3/G141 grism spectra, redshifts, and emission line measurements for $sim 100,000$ galaxies
Ivelina G. Momcheva ; Gabriel B. Brammer ; Pieter G. van Dokkum ; Rosalind E. Skelton ; Katherine E. Whitaker ; Erica J. Nelson ; Mattia Fumagalli ; Michael V. Maseda ; Joel Leja ; Marijn Franx ; Hans-Walter Rix ; Rachel Bezanson ; Elisabete Da Cunha ; Claire Dickey ; Natascha M. Förster Schreiber ; Garth Illingworth ; Mariska Kriek ; Ivo Labbé ; Johannes Ulf Lange ; Britt F. Lundgren ; Daniel Magee ; Danilo Marchesini ; Pascal Oesch ; Camilla Pacifici ; Shannon G. Patel ; Sedona Price ; Tomer Tal ; David A. Wake ; Arjen van der Wel ; Stijn Wuyts ;
Date 7 Oct 2015
AbstractWe 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 $H_{140}$ imaging, parallel ACS G800L spectroscopy, and parallel $I_{814}$ imaging. In a previous paper (Skelton et al. 2014) 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. The data analysis is complicated by the fact that no slits are used: all objects in the WFC3 field are dispersed, and many spectra overlap. We developed software to automatically and optimally extract interlaced 2D and 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 98,663 measured redshifts and line strengths down to $JH_{IR}leq 26$ and 22,548 with $JH_{IR}leq 24$, where we comfortably detect continuum emission. Of this sample 5,459 galaxies are at $z>1.5$ and 9,621 are at $0.7<z<1.5$, where H$alpha$ falls in the G141 wavelength coverage. Based on comparisons with ground-based spectroscopic redshifts, and on analyses of paired galaxies and repeat observations, the typical redshift error for $JH_{IR}leq 24$ galaxies in our catalog is $sigma_z approx 0.003 imes (1+z)$, i.e., one native WFC3 pixel. The $3sigma$ limit for emission line fluxes of point sources is $1.5 imes10^{-17}$ ergs s$^{-1}$ cm$^{-2}$. We show various representations of the full dataset, as well as individual examples that highlight the range of spectra that we find in the survey.
Source arXiv, 1510.2106
Services Forum | Review | PDF | Favorites   
 
Visitor rating: did you like this article? no 1   2   3   4   5   yes

No review found.
 Did you like this article?

This article or document is ...
important:
of broad interest:
readable:
new:
correct:
Global appreciation:

  Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.

browser claudebot






ScienXe.org
» my Online CV
» Free


News, job offers and information for researchers and scientists:
home  |  contact  |  terms of use  |  sitemap
Copyright © 2005-2024 - Scimetrica