Astronomical instrumentation

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A few StePS forward in unveiling the complexity of galaxy evolution: light-weighted stellar ages of intermediate redshift galaxies with WEAVE

(2019)

Authors:

L Costantin, A Iovino, S Zibetti, M Longhetti, A Gallazzi, A Mercurio, I Lonoce, M Balcells, M Bolzonella, G Busarello, G Dalton, A Ferré-Mateu, R García-Benito, A Gargiulo, C Haines, S Jin, F La Barbera, S McGee, P Merluzzi, L Morelli, DNA Murphy, L Peralta de Arriba, A Pizzella, BM Poggianti, L Pozzetti, P Sánchez-Blázquez, M Talia, C Tortora, SC Trager, A Vazdekis, D Vergani, B Vulcani
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Accretion and star formation in ‘radio-quiet’ quasars

Proceedings of the International Astronomical Union Cambridge University Press (CUP) 15:S356 (2019) 204-208

Authors:

Sarah V White, Matt J Jarvis, Eleni Kalfountzou, Martin J Hardcastle, Aprajita Verma, José M Cao Orjales, Jason Stevens
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Better support for collaborations preparing for large-scale projects: the case study of the LSST Science Collaborations

Bulletin of the American Astronomical Society American Astronomical Society 51:7 (2019) 185

Authors:

Federica B Bianco, Manda Banerji, Robert Blum, John Bochanski, William N Brandt, Patricia Burchat, John Gizis, Zeljko Ivezić, Charles Keaton, Sugata Kaviraj, Tom Loredo, Rachel Mandelbaum, Phil Marshall, Peregrine McGehee, Chad Schafer, Megan E Schwamb, Jennifer L Sokoloski, Michael A Strauss, Rachel Street, David Trilling, Aprajita Verma

Abstract:

Through the lens of the LSST Science Collaborations’ experience, we advocate for new, improved ways to fund large, complex collaborations as they work in preparation for and on peta-scale surveys. We advocate for the establishment of programs to support research and infrastructure that enables innovative collaborative research on such scales.
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Unravelling the origin of the counter-rotating core in IC 1459 with KMOS and MUSE

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 488:2 (2019) 1679-1694

Authors:

Laura J Prichard, Sam P Vaughan, Roger L Davies
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Gain stabilization for radio intensity mapping using a continuous-wave reference signal

Monthly Notices of the Royal Astronomical Society Oxford University Press 489:1 (2019) 548-554

Authors:

Alexander Pollak, CM Holler, ME Jones, AC Taylor

Abstract:

Stabilizing the gain of a radio astronomy receiver is of great importance for sensitive radio intensity mapping. In this paper we discuss a stabilization method using a continuous-wave reference signal injected into the signal chain and tracked in a single channel of the spectrometer to correct for the gain variations of the receiver. This method depends on the fact that gain fluctuations of the receiver are strongly correlated across the frequency band, which we can show is the case for our experimental set-up. This method is especially suited for receivers with a digital back-end with high spectral resolution and moderate dynamic range. The sensitivity of the receiver is unaltered except for one lost frequency channel. We present experimental results using a new 4–8.5 GHz receiver with a digital back-end that shows substantial reduction of the 1/f noise and the 1/f knee frequency.
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