A Spectroscopic Redshift Measurement for a Luminous Lyman Break Galaxy at z = 7.730 Using Keck/MOSFIRE

@article{Oesch2015ASR,
  title={A Spectroscopic Redshift Measurement for a Luminous Lyman Break Galaxy at z = 7.730 Using Keck/MOSFIRE},
  author={Pascal A. Oesch and Pieter van Dokkum and Garth D. Illingworth and Rychard J. Bouwens and Ivelina G. Momcheva and Bradford Holden and Guido Roberts-Borsani and Renske Smit and Marijn Franx and Ivo Labb{\'e} and Valentino Gonzalez and Daniel K. Magee},
  journal={The Astrophysical Journal},
  year={2015},
  volume={804}
}
We present a spectroscopic redshift measurement of a very bright Lyman break galaxy at $z=7.7302\pm 0.0006$ using the Keck/Multi-Object Spectrometer for Infra-Red Exploration. The source was pre-selected photometrically in the EGS field as a robust z ∼ 8 candidate with H = 25.0 mag based on optical non-detections and a very red Spitzer/IRAC [3.6]–[4.5] broad-band color driven by high equivalent width [O iii]+Hβ line emission. The Lyα line is reliably detected at $6.1\sigma $ and shows an… 

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