The LOFAR Two-metre Sky Survey IV. First Data Release: Photometric redshifts and rest-frame magnitudes

Kenneth J Duncan; J. Sabater; H. J. A. Röttgering; M. J. Jarvis; D. J. B. Smith; P. N. Best; J. R. Callingham; R. Cochrane; J. H. Croston; M. J. Hardcastle; B. Mingo; L. Morabito; D. Nisbet; I. Prandoni; T. W. Shimwell; C. Tasse; G. J. White; W. L. Williams; L. Alegre; K. T. Chyży; G. Gürkan; M. Hoeft; R. Kondapally; A. P. Mechev; G. K. Miley; D. J. Schwarz; R. J. van Weeren

doi:10.1051/0004-6361/201833562

The LOFAR Two-metre Sky Survey IV. First Data Release: Photometric redshifts and rest-frame magnitudes

Kenneth J Duncan, J. Sabater, H. J. A. Röttgering, M. J. Jarvis, D. J. B. Smith, P. N. Best, J. R. Callingham, R. Cochrane, J. H. Croston, M. J. Hardcastle, B. Mingo, L. Morabito, D. Nisbet, I. Prandoni, T. W. Shimwell, C. Tasse, G. J. White, W. L. Williams, L. Alegre, K. T. ChyżyG. Gürkan, M. Hoeft, R. Kondapally, A. P. Mechev, G. K. Miley, D. J. Schwarz, R. J. van Weeren

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Abstract

The LOFAR Two-metre Sky Survey (LoTSS) is a sensitive, high-resolution 120-168 MHz survey of the Northern sky. The LoTSS First Data Release (DR1) presents 424 square degrees of radio continuum observations over the HETDEX Spring Field (10h45m00s $ 0.15$) of 7.9%. We also find that, at a given redshift, there is no strong trend in photo-$z$ quality as a function of radio luminosity. However there are strong trends as a function of redshift for a given radio luminosity, a result of selection effects in the spectroscopic sample and/or intrinsic evolution within the radio source population. Additionally, for the sample of sources in the LoTSS First Data Release with optical counterparts, we present rest-frame optical and mid-infrared magnitudes based on template fits to the consensus photometric (or spectroscopic when available) redshift.

Original language	English
Journal	Astronomy & Astrophysics
Early online date	19 Nov 2018
DOIs	https://doi.org/10.1051/0004-6361/201833562
Publication status	E-pub ahead of print - 19 Nov 2018

Keywords

astro-ph.GA
astro-ph.CO
astro-ph.HE

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10.1051/0004-6361/201833562Licence: Other

1811.07928v1
Reproduced with permission from Astronomy & Astrophysics. © 2019 ESO.
Accepted author manuscript, 2.24 MBLicence: Other

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Duncan, K. J., Sabater, J., Röttgering, H. J. A., Jarvis, M. J., Smith, D. J. B., Best, P. N., Callingham, J. R., Cochrane, R., Croston, J. H., Hardcastle, M. J., Mingo, B., Morabito, L., Nisbet, D., Prandoni, I., Shimwell, T. W., Tasse, C., White, G. J., Williams, W. L., Alegre, L., ... Weeren, R. J. V. (2018). The LOFAR Two-metre Sky Survey IV. First Data Release: Photometric redshifts and rest-frame magnitudes. Astronomy & Astrophysics. Advance online publication. https://doi.org/10.1051/0004-6361/201833562

@article{3b690005af2246b093b1eb172ff88d9d,

title = "The LOFAR Two-metre Sky Survey IV. First Data Release: Photometric redshifts and rest-frame magnitudes",

abstract = " The LOFAR Two-metre Sky Survey (LoTSS) is a sensitive, high-resolution 120-168 MHz survey of the Northern sky. The LoTSS First Data Release (DR1) presents 424 square degrees of radio continuum observations over the HETDEX Spring Field (10h45m00s \$ 0.15\$) of 7.9\%. We also find that, at a given redshift, there is no strong trend in photo-\$z\$ quality as a function of radio luminosity. However there are strong trends as a function of redshift for a given radio luminosity, a result of selection effects in the spectroscopic sample and/or intrinsic evolution within the radio source population. Additionally, for the sample of sources in the LoTSS First Data Release with optical counterparts, we present rest-frame optical and mid-infrared magnitudes based on template fits to the consensus photometric (or spectroscopic when available) redshift. ",

keywords = "astro-ph.GA, astro-ph.CO, astro-ph.HE",

author = "Duncan, \{Kenneth J\} and J. Sabater and R{\"o}ttgering, \{H. J. A.\} and Jarvis, \{M. J.\} and Smith, \{D. J. B.\} and Best, \{P. N.\} and Callingham, \{J. R.\} and R. Cochrane and Croston, \{J. H.\} and Hardcastle, \{M. J.\} and B. Mingo and L. Morabito and D. Nisbet and I. Prandoni and Shimwell, \{T. W.\} and C. Tasse and White, \{G. J.\} and Williams, \{W. L.\} and L. Alegre and Chy{\.z}y, \{K. T.\} and G. G{\"u}rkan and M. Hoeft and R. Kondapally and Mechev, \{A. P.\} and Miley, \{G. K.\} and Schwarz, \{D. J.\} and Weeren, \{R. J. van\}",

note = "16 figures, 1 table and 18 pages. This paper is part of the LOFAR surveys Data Release 1 and has been accepted for publication in a special edition of A\&A that will appear in Feb 2019, Volume 622. The catalogues and images from the data release will be publicly available at http://www.lofar-surveys.org upon publication of the volume. Reproduced with permission from Astronomy \& Astrophysics. {\textcopyright} 2019 ESO.",

year = "2018",

month = nov,

day = "19",

doi = "10.1051/0004-6361/201833562",

language = "English",

journal = "Astronomy \& Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Duncan, KJ, Sabater, J, Röttgering, HJA, Jarvis, MJ, Smith, DJB, Best, PN, Callingham, JR, Cochrane, R, Croston, JH, Hardcastle, MJ , Mingo, B, Morabito, L, Nisbet, D, Prandoni, I, Shimwell, TW, Tasse, C, White, GJ, Williams, WL, Alegre, L, Chyży, KT, Gürkan, G, Hoeft, M, Kondapally, R, Mechev, AP, Miley, GK, Schwarz, DJ & Weeren, RJV 2018, 'The LOFAR Two-metre Sky Survey IV. First Data Release: Photometric redshifts and rest-frame magnitudes', Astronomy & Astrophysics. https://doi.org/10.1051/0004-6361/201833562

TY - JOUR

T1 - The LOFAR Two-metre Sky Survey IV. First Data Release: Photometric redshifts and rest-frame magnitudes

AU - Duncan, Kenneth J

AU - Sabater, J.

AU - Röttgering, H. J. A.

AU - Jarvis, M. J.

AU - Smith, D. J. B.

AU - Best, P. N.

AU - Callingham, J. R.

AU - Cochrane, R.

AU - Croston, J. H.

AU - Hardcastle, M. J.

AU - Mingo, B.

AU - Morabito, L.

AU - Nisbet, D.

AU - Prandoni, I.

AU - Shimwell, T. W.

AU - Tasse, C.

AU - White, G. J.

AU - Williams, W. L.

AU - Alegre, L.

AU - Chyży, K. T.

AU - Gürkan, G.

AU - Hoeft, M.

AU - Kondapally, R.

AU - Mechev, A. P.

AU - Miley, G. K.

AU - Schwarz, D. J.

AU - Weeren, R. J. van

N1 - 16 figures, 1 table and 18 pages. This paper is part of the LOFAR surveys Data Release 1 and has been accepted for publication in a special edition of A&A that will appear in Feb 2019, Volume 622. The catalogues and images from the data release will be publicly available at http://www.lofar-surveys.org upon publication of the volume. Reproduced with permission from Astronomy & Astrophysics. © 2019 ESO.

PY - 2018/11/19

Y1 - 2018/11/19

N2 - The LOFAR Two-metre Sky Survey (LoTSS) is a sensitive, high-resolution 120-168 MHz survey of the Northern sky. The LoTSS First Data Release (DR1) presents 424 square degrees of radio continuum observations over the HETDEX Spring Field (10h45m00s $ 0.15$) of 7.9%. We also find that, at a given redshift, there is no strong trend in photo-$z$ quality as a function of radio luminosity. However there are strong trends as a function of redshift for a given radio luminosity, a result of selection effects in the spectroscopic sample and/or intrinsic evolution within the radio source population. Additionally, for the sample of sources in the LoTSS First Data Release with optical counterparts, we present rest-frame optical and mid-infrared magnitudes based on template fits to the consensus photometric (or spectroscopic when available) redshift.

AB - The LOFAR Two-metre Sky Survey (LoTSS) is a sensitive, high-resolution 120-168 MHz survey of the Northern sky. The LoTSS First Data Release (DR1) presents 424 square degrees of radio continuum observations over the HETDEX Spring Field (10h45m00s $ 0.15$) of 7.9%. We also find that, at a given redshift, there is no strong trend in photo-$z$ quality as a function of radio luminosity. However there are strong trends as a function of redshift for a given radio luminosity, a result of selection effects in the spectroscopic sample and/or intrinsic evolution within the radio source population. Additionally, for the sample of sources in the LoTSS First Data Release with optical counterparts, we present rest-frame optical and mid-infrared magnitudes based on template fits to the consensus photometric (or spectroscopic when available) redshift.

KW - astro-ph.GA

KW - astro-ph.CO

KW - astro-ph.HE

U2 - 10.1051/0004-6361/201833562

DO - 10.1051/0004-6361/201833562

M3 - Article

SN - 0004-6361

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

ER -

The LOFAR Two-metre Sky Survey IV. First Data Release: Photometric redshifts and rest-frame magnitudes

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