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The redshift of the BL Lac object TXS 0506+056
- Publication Year :
- 2018
-
Abstract
- The bright BL Lac object TXS 0506+056 is a 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 $\textrm{\AA}$, obtained at the 10.4m 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 $\sim$ 0.1 $\textrm{\AA}$) emission lines that we identify with [O II] 3727 $\textrm{\AA}$, [O III] 5007 $\textrm{\AA}$, and [N II] 6583 $\textrm{\AA}$, yielding the redshift z = 0.3365$\pm$0.0010.<br />Comment: 7 pages, 3 figures, 2 tables; accepted for publication in ApJL
- Subjects :
- High Energy Astrophysical Phenomena (astro-ph.HE)
Gran Telescopio Canarias
Physics
010308 nuclear & particles physics
Continuum (design consultancy)
Doubly ionized oxygen
FOS: Physical sciences
Astronomy and Astrophysics
Astrophysics
01 natural sciences
Astrophysics - Astrophysics of Galaxies
Redshift
Space and Planetary Science
Astrophysics of Galaxies (astro-ph.GA)
0103 physical sciences
Emission spectrum
Neutrino
Spectroscopy
Astrophysics - High Energy Astrophysical Phenomena
010303 astronomy & astrophysics
BL Lac object
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....d2a0aa55f06c09255465eae7b49ae3d7