@article{72701298b2af4526a4e7d1499cd656d6,
title = "NICMOS imaging of the dusty microjansky radio source VLA J1236421621331 at Z = 4.4241",
abstract = "We present the discovery of a radio galaxy at a likely redshift of z = 4.424 in one of the flanking fields of the Hubble Deep Field (HDF). Radio observations with the Very Large Array and MERLIN centered on the HDF yielded a complete sample of microjansky radio sources, of which about 20% have no optical counterpart to I ≤ 25 mag. In this Letter, we address the possible nature of one of these sources through deep Hubble Space Telescope near-infrared camera and multiobject spectrometer (NICMOS) images in the F110W (J110 and F160W (H160) filters. VLA J123642+621331 has a single emission line at 6595 Ao, which we identify with Lya at z =. We argue that this faint ( mag), compact ( 0.2), red (I4.424 H = 23.9 red I8142K = 2.0) object is most likely a 160 e dusty, star-forming galaxy with an embedded active nucleus.",
keywords = "Galaxies: active-galaxies: evolution, Galaxies: individual (VLA J123642+621331), Galaxies: starburst",
author = "I. Waddington and Rogier Windhorst and Cohen, {S. H.} and Partridge, {R. B.} and H. Spinrad and D. Stern",
note = "Funding Information: We thank Eric Richards, Ken Kellerman, Ed Fomalont, and Tom Muxlow for useful discussions and for sharing unpublished data, Andy Bunker for contributing to the Keck observations, and Mark Dickinson for making his KPNO infrared observations of the HDF publicly available. This work was supported by NASA grant GO-7452.0*.96A from STScI under NASA contract NAS5-26555 and by NSF grant AST 98-02963. Funding Information: 1 Based on observations with the NASA/ESA Hubble Space Telescope obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555 and with the W. M. Keck Observatory, which is operated as a scientific partnership among the University of California, the California Institute of Technology, and NASA, made possible by the generous financial support of the W. M. Keck Foundation. Publisher Copyright: {\textcopyright}1999. The American Astronomical Society. All rights reserved. Printed in U.S.A.",
year = "1999",
month = dec,
day = "1",
doi = "10.1086/312375/pdf",
language = "English (US)",
volume = "526",
pages = "L77--L80",
journal = "Astrophysical Journal Letters",
issn = "2041-8205",
publisher = "IOP Publishing Ltd.",
number = "2",
}