The Redshift of the BL Lac Object TXS 0506+056

By S. Paiano, R. Falomo, A. Treves, R. Scarpa. 2018

137 citations recorded by the source corpus.

The bright BL Lac object TXS 0506+056 is the most likely counterpart of the IceCube neutrino event EHE 170922A. The lack of this redshift prevents a comprehensive understanding of the modeling of the source. We present high signal-to-noise optical spectroscopy, in the range 4100–9000 Å, obtained at the 10.4 m Gran Telescopio Canarias. The spectrum is characterized by a power-law continuum and is marked by faint interstellar features. In the regions unaffected by these features, we found three very weak (EW ∼ 0.1 Å) emission lines that we identify with [O ii] 3727 Å, [O iii] 5007 Å, and [N ii] 6583 Å, yielding the redshift z = 0.3365 ± 0.0010.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/3d35f912a42c71b29a1a64ead33a61d516cb70dd

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Citations in the corpus

Leptohadronic single-zone models for the electromagnetic and neutrino emission of TXS 0506+056 (2018, background): “The redshift of the source was recently measured to be z = 0.337 (Paiano et al. 2018).”
Blazar Flares as an Origin of High-energy Cosmic Neutrinos? (2018, background): “Recently, IceCube-Collaboration et al. (2018) has reported a ∼ 0.1− 1 PeV muon neutrino event, IceCube170922A, coincident with a month- to year-long γ-ray flare of the blazar TXS 0506+056 at redshift z ≈ 0.336 (Paiano et al. 2018).”
The Blazar TXS 0506+056 Associated with a High-energy Neutrino: Insights into Extragalactic Jets and Cosmic-Ray Acceleration (2018, background): “The redshift has been recently measured to be z = 0.3365±0.0010 (Paiano et al. 2018).”
Multimessenger observations of a flaring blazar coincident with high-energy neutrino IceCube-170922A (2018, methodology): “These upper limits are consistent with the measured redshift of z 1⁄4 0:3365 (28).”