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ALMACAL IV: a catalogue of ALMA calibrator continuum observations

Bonato, M. and Liuzzo, E. and Giannetti, A. and Massardi, M. and De Zotti, G. and Burkutean, S. and Galluzzi, V. and Negrello, M. and Baronchelli, I. and Brand, J. and Zwaan, M. A. and Rygl, K. L. J. and Marchili, N. and Klitsch, A. and Oteo, I. (2018) ALMACAL IV: a catalogue of ALMA calibrator continuum observations. Monthly Notices of the Royal Astronomical Society, 478 (2). pp. 1512-1519. ISSN 0035-8711. http://resolver.caltech.edu/CaltechAUTHORS:20180809-140920795

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Abstract

We present a catalogue of ALMA flux density measurements of 754 calibrators observed between 2012 August and 2017 September, for a total of 16263 observations in different bands and epochs. The flux densities were measured by reprocessing the ALMA images generated in the framework of the ALMACAL project, with a new code developed by the Italian node of the European ALMA Regional Centre. A search in the online data bases yielded redshift measurements for 589 sources (∼78 per cent of the total). Almost all sources are flat spectrum, based on their low-frequency spectral index, and have properties consistent with being blazars of different types. To illustrate the properties of the sample, we show the redshift and flux density distributions as well as the distributions of the number of observations of individual sources and of timespans in the source frame for sources observed in bands 3 (84−116 GHz) and 6 (211−275 GHz). As examples of the scientific investigations allowed by the catalogue, we briefly discuss the variability properties of our sources in ALMA bands 3 and 6 and the frequency spectra between the effective frequencies of these bands. We find that the median variability index steadily increases with the source-frame time lag increasing from 100 to 800  d, and that the frequency spectra of BL Lacs are significantly flatter than those of flat-spectrum radio quasars. We also show the global spectral energy distributions of our sources over 17 orders of magnitude in frequency.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1093/mnras/sty1173DOIArticle
https://arxiv.org/abs/1805.00024arXivDiscussion Paper
ORCID:
AuthorORCID
De Zotti, G.0000-0003-2868-2595
Baronchelli, I.0000-0003-0556-2929
Additional Information:© 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/about_us/legal/notices). Accepted 2018 April 20. Received 2018 March 26; in original form 2018 February 2. Published: 05 May 2018. We thank Ian Smail for his useful comments. We are indebted to Edward Fomalont for enlightening discussions, highly valuable suggestions, and for his extensive work, together with Ruediger Kneissl and Antonio Hales, on ALMA calibrator catalogues and calibration error estimation. This paper and the AKF and KAFE development are part of the activities for the ALMA re-imaging Study approved in the framework of the 2016 ESO Call for Development Studies for ALMA Upgrade (PI: Massardi). The study acknowledges partial financial support by the Italian Ministero dell’Istruzione, Università e Ricerca through the grant ‘Progetti Premiali 2012 - iALMA’ (CUP C52I13000140001). GDZ acknowledges support from ASI/INAF agreement no. 2014-024-R.1 for the Planck LFI Activity of Phase E2 and from the ASI/Physics Department of the university of Roma–Tor Vergata agreement no. 2016-24-H.0 for study activities of the Italian cosmology community. MN acknowledges support from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska–Curie grant agreement no. 707601. This research has made use of the NED, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.
Funders:
Funding AgencyGrant Number
Ministero dell’Istruzione, Università e Ricerca (MIUR)CUP C52I13000140001
Agenzia Spaziale Italiana (ASI)2014-024-R.1
University of Rome Tor Vergata2016-24-H.0
Marie Curie Fellowship707601
NASA/JPL/CaltechUNSPECIFIED
Subject Keywords:galaxies: abundances – galaxies: active – galaxies: photometry – submillimetre: galaxies
Record Number:CaltechAUTHORS:20180809-140920795
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20180809-140920795
Official Citation:M Bonato, E Liuzzo, A Giannetti, M Massardi, G De Zotti, S Burkutean, V Galluzzi, M Negrello, I Baronchelli, J Brand, M A Zwaan, K L J Rygl, N Marchili, A Klitsch, I Oteo; ALMACAL IV: a catalogue of ALMA calibrator continuum observations, Monthly Notices of the Royal Astronomical Society, Volume 478, Issue 2, 1 August 2018, Pages 1512–1519, https://doi.org/10.1093/mnras/sty1173
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:88713
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:09 Aug 2018 21:23
Last Modified:09 Aug 2018 21:23

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