Continuum source catalog for the first APERTIF data release

A. M. Kutkin; T. A. Oosterloo; R. Morganti; E. A. K. Adams; M. Mancini; B. Adebahr; W. J. G. de Blok; H. Dénes; K. M. Hess; J. M. van der Hulst; D. M. Lucero; V. A. Moss; A. Berger; R. van den Brink; W. A. van Cappellen; L. Connor; S. Damstra; G. M. Loose; J. van Leeuwen; Y. Maan; Á. Mika; M. J. Norden; A. R. Offringa; L. C. Oostrum; D. van der Schuur; D. Vohl; S. J. Wijnholds; J. Ziemke

doi:10.1051/0004-6361/202244008

Continuum source catalog for the first APERTIF data release

A. M. Kutkin^*, T. A. Oosterloo, R. Morganti, E. A. K. Adams, M. Mancini, B. Adebahr, W. J. G. de Blok, H. Dénes, K. M. Hess, J. M. van der Hulst, D. M. Lucero, V. A. Moss, A. Berger, R. van den Brink, W. A. van Cappellen, L. Connor, S. Damstra, G. M. Loose, J. van Leeuwen, Y. MaanÁ. Mika, M. J. Norden, A. R. Offringa, L. C. Oostrum, D. van der Schuur, D. Vohl, S. J. Wijnholds, J. Ziemke

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

The first data release from Apertif survey contains 3074 radio continuum images, covering a thousand square degrees of the sky. The observations were performed between August 2019 and July 2020. The continuum images were produced at a central frequency 1355 MHz, with a bandwidth of ~150 MHz and angular resolution of up to 10″. In this work, we introduce and apply a new method to obtain a primary beam model based on a machine-learning approach, namely, Gaussian process regression. The primary beam models obtained with this method have been published, along with the data products for the first Apertif data release. We applied the method to the continuum images, carried out a mosaicking process on their basis, and extracted the source catalog. The catalog contains 249672 radio sources, many of which have been detected for the first time at these frequencies. We cross-matched the coordinates with the NVSS, LOFAR/DR1/value-added, and LOFAR/DR2 catalogs - resulting in 44523, 22825, and 152824 common sources, respectively. The first sample provides a unique opportunity for detecting long-term transient sources, which have significantly changed their flux density over the past 25 yr. A combination of the second and the third samples provides valuable information on the spectral properties of the sources in addition to redshift estimates.

Full Tables 1 and 3 are only available at the CDS via anonymous ftp to cdsarc.cds.unistra.fr (ftp://130.79.128.5) or via https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/667/A39

Original language	English
Article number	A39
Number of pages	12
Journal	Astronomy & Astrophysics
Volume	667
DOIs	https://doi.org/10.1051/0004-6361/202244008
Publication status	Published - 1-Nov-2022

Keywords

astronomical databases: miscellaneous
catalogs
surveys
radio continuum: general
Astrophysics - Instrumentation and Methods for Astrophysics
Astrophysics - Astrophysics of Galaxies

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Continuum source catalog for the first APERTIF data releaseFinal publisher's version, 6.21 MBLicence: CC BY

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Kutkin, A. M., Oosterloo, T. A., Morganti, R., Adams, E. A. K., Mancini, M., Adebahr, B., de Blok, W. J. G., Dénes, H., Hess, K. M., van der Hulst, J. M., Lucero, D. M., Moss, V. A., Berger, A., van den Brink, R., van Cappellen, W. A., Connor, L., Damstra, S., Loose, G. M., van Leeuwen, J., ... Ziemke, J. (2022). Continuum source catalog for the first APERTIF data release. Astronomy & Astrophysics, 667, Article A39. https://doi.org/10.1051/0004-6361/202244008

@article{3e32ff517f1546c3a832b99f90376fd5,

title = "Continuum source catalog for the first APERTIF data release",

abstract = "The first data release from Apertif survey contains 3074 radio continuum images, covering a thousand square degrees of the sky. The observations were performed between August 2019 and July 2020. The continuum images were produced at a central frequency 1355 MHz, with a bandwidth of ~150 MHz and angular resolution of up to 10″. In this work, we introduce and apply a new method to obtain a primary beam model based on a machine-learning approach, namely, Gaussian process regression. The primary beam models obtained with this method have been published, along with the data products for the first Apertif data release. We applied the method to the continuum images, carried out a mosaicking process on their basis, and extracted the source catalog. The catalog contains 249672 radio sources, many of which have been detected for the first time at these frequencies. We cross-matched the coordinates with the NVSS, LOFAR/DR1/value-added, and LOFAR/DR2 catalogs - resulting in 44523, 22825, and 152824 common sources, respectively. The first sample provides a unique opportunity for detecting long-term transient sources, which have significantly changed their flux density over the past 25 yr. A combination of the second and the third samples provides valuable information on the spectral properties of the sources in addition to redshift estimates. Full Tables 1 and 3 are only available at the CDS via anonymous ftp to cdsarc.cds.unistra.fr (ftp://130.79.128.5) or via https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/667/A39",

keywords = "astronomical databases: miscellaneous, catalogs, surveys, radio continuum: general, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Astrophysics of Galaxies",

author = "Kutkin, {A. M.} and Oosterloo, {T. A.} and R. Morganti and Adams, {E. A. K.} and M. Mancini and B. Adebahr and {de Blok}, {W. J. G.} and H. D{\'e}nes and Hess, {K. M.} and {van der Hulst}, {J. M.} and Lucero, {D. M.} and Moss, {V. A.} and A. Berger and {van den Brink}, R. and {van Cappellen}, {W. A.} and L. Connor and S. Damstra and Loose, {G. M.} and {van Leeuwen}, J. and Y. Maan and {\'A}. Mika and Norden, {M. J.} and Offringa, {A. R.} and Oostrum, {L. C.} and {van der Schuur}, D. and D. Vohl and Wijnholds, {S. J.} and J. Ziemke",

year = "2022",

month = nov,

day = "1",

doi = "10.1051/0004-6361/202244008",

language = "English",

volume = "667",

journal = "Astronomy & Astrophysics",

issn = "0004-6361",

publisher = " EDP Sciences",

}

Kutkin, AM, Oosterloo, TA , Morganti, R , Adams, EAK, Mancini, M, Adebahr, B, de Blok, WJG, Dénes, H, Hess, KM, van der Hulst, JM, Lucero, DM, Moss, VA, Berger, A, van den Brink, R, van Cappellen, WA, Connor, L, Damstra, S, Loose, GM, van Leeuwen, J, Maan, Y, Mika, Á, Norden, MJ, Offringa, AR, Oostrum, LC, van der Schuur, D, Vohl, D, Wijnholds, SJ & Ziemke, J 2022, 'Continuum source catalog for the first APERTIF data release', Astronomy & Astrophysics, vol. 667, A39. https://doi.org/10.1051/0004-6361/202244008

TY - JOUR

T1 - Continuum source catalog for the first APERTIF data release

AU - Kutkin, A. M.

AU - Oosterloo, T. A.

AU - Morganti, R.

AU - Adams, E. A. K.

AU - Mancini, M.

AU - Adebahr, B.

AU - de Blok, W. J. G.

AU - Dénes, H.

AU - Hess, K. M.

AU - van der Hulst, J. M.

AU - Lucero, D. M.

AU - Moss, V. A.

AU - Berger, A.

AU - van den Brink, R.

AU - van Cappellen, W. A.

AU - Connor, L.

AU - Damstra, S.

AU - Loose, G. M.

AU - van Leeuwen, J.

AU - Maan, Y.

AU - Mika, Á.

AU - Norden, M. J.

AU - Offringa, A. R.

AU - Oostrum, L. C.

AU - van der Schuur, D.

AU - Vohl, D.

AU - Wijnholds, S. J.

AU - Ziemke, J.

PY - 2022/11/1

Y1 - 2022/11/1

N2 - The first data release from Apertif survey contains 3074 radio continuum images, covering a thousand square degrees of the sky. The observations were performed between August 2019 and July 2020. The continuum images were produced at a central frequency 1355 MHz, with a bandwidth of ~150 MHz and angular resolution of up to 10″. In this work, we introduce and apply a new method to obtain a primary beam model based on a machine-learning approach, namely, Gaussian process regression. The primary beam models obtained with this method have been published, along with the data products for the first Apertif data release. We applied the method to the continuum images, carried out a mosaicking process on their basis, and extracted the source catalog. The catalog contains 249672 radio sources, many of which have been detected for the first time at these frequencies. We cross-matched the coordinates with the NVSS, LOFAR/DR1/value-added, and LOFAR/DR2 catalogs - resulting in 44523, 22825, and 152824 common sources, respectively. The first sample provides a unique opportunity for detecting long-term transient sources, which have significantly changed their flux density over the past 25 yr. A combination of the second and the third samples provides valuable information on the spectral properties of the sources in addition to redshift estimates. Full Tables 1 and 3 are only available at the CDS via anonymous ftp to cdsarc.cds.unistra.fr (ftp://130.79.128.5) or via https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/667/A39

AB - The first data release from Apertif survey contains 3074 radio continuum images, covering a thousand square degrees of the sky. The observations were performed between August 2019 and July 2020. The continuum images were produced at a central frequency 1355 MHz, with a bandwidth of ~150 MHz and angular resolution of up to 10″. In this work, we introduce and apply a new method to obtain a primary beam model based on a machine-learning approach, namely, Gaussian process regression. The primary beam models obtained with this method have been published, along with the data products for the first Apertif data release. We applied the method to the continuum images, carried out a mosaicking process on their basis, and extracted the source catalog. The catalog contains 249672 radio sources, many of which have been detected for the first time at these frequencies. We cross-matched the coordinates with the NVSS, LOFAR/DR1/value-added, and LOFAR/DR2 catalogs - resulting in 44523, 22825, and 152824 common sources, respectively. The first sample provides a unique opportunity for detecting long-term transient sources, which have significantly changed their flux density over the past 25 yr. A combination of the second and the third samples provides valuable information on the spectral properties of the sources in addition to redshift estimates. Full Tables 1 and 3 are only available at the CDS via anonymous ftp to cdsarc.cds.unistra.fr (ftp://130.79.128.5) or via https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/667/A39

KW - astronomical databases: miscellaneous

KW - catalogs

KW - surveys

KW - radio continuum: general

KW - Astrophysics - Instrumentation and Methods for Astrophysics

KW - Astrophysics - Astrophysics of Galaxies

U2 - 10.1051/0004-6361/202244008

DO - 10.1051/0004-6361/202244008

M3 - Article

SN - 0004-6361

VL - 667

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

M1 - A39

ER -

Continuum source catalog for the first APERTIF data release

Abstract

Keywords

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