Johan Morren

Status and performance of the Asgard/NOTT cold nulling camera

Peter Marley Chingaipe, György Medgyesi, Alexandra Mazzoli, Emilie Bouzerand et autres

The Nulling Observations of dusT and PlaneTs (NOTT) instrument, part of the Asgard suite, will be the first nuller on the Very Large Telescope Interferometer (VLTI). Using long-baseline nulling interferometry in the L′-band (3.5–4.0μm), NOTT suppresses stellar light to enable high-contrast imaging …

be, ch, hu, au, nl, fr, us (code pays fourni par la source)

Risk-Aware Congestion Management With Capacity Limitation Contracts and Redispatch

Bart van der Holst, Phuong Hong Nguyen, Johan Morren, Koen Kok

We propose the first approach to risk-aware congestion management with multiple instruments, by framing congestion management as a resource allocation problem over a portfolio of instruments with distinct risk profiles. We apply this framework to the coordination of capacity limitation contracts (CLCs) …

nl (code pays fourni par la source)

A Planning Framework for Power-to-Gas in Multi-Energy Distribution Systems

Thomas Swarts, Johan Morren, Wouter van den Akker, Arjan van Voorden et autres

Power-to-gas (P2G) systems can provide multifaceted services within Multi-Energy Systems (MES) beyond traditional roles. When strategically deployed, P2G systems can mitigate congestion in the electricity grid, advance the heat transition through the utilization of their waste heat, and optimize the usage of …

nl (code pays fourni par la source)

The Impact of Network Tariffs on Grid Congestion in the Built Environment: A Dutch Case Study

Gijs Verhoeven, Bart van der Holst, Koen Kok, Phuong Hong Nguyen et autres

nl (code pays fourni par la source)

Risk-Aware Contracting Strategies for Electrolytic Hydrogen Projects Facing Grid Congestion

Thomas Swarts, Wouter van Den Akker, Johan Morren, Arjan van Voorden et autres

Electrolytic hydrogen is expected to play a key role in decarbonizing energy systems in Europe. However, such projects face uncertain grid access due to congestion and struggle with financial viability. To address growing grid congestion in the Netherlands, different types of non-firm …

nl (code pays fourni par la source)

STL Enhanced Models for Mid-Term Reactive Power Forecasting

Anna Shuvarina, Phuong H. Nguyen, Akhtar Hussain Javed, Johan Morren et autres

This paper presents a framework for mid-term reactive power forecasting at the transmission–distribution interface. Seasonal-trend decomposition with locally estimated scatterplot smoothing (STL-LOESS) is used as a preprocessing step to isolate short-term variations from non-linear trends and seasonal effects. Forecasting models are trained …

nl (code pays fourni par la source)

L-band nulling interferometry at the VLTI with Asgard/NOTT: status and plans

Denis Defrère, Romain Laugier, Marc-Antoine Martinod, Germain Garreau et autres

NOTT (formerly Hi-5) is the L’-band (3.5-4.0μm) nulling interferometer of Asgard, an instrument suite in preparation for the VLTI visitor focus. The primary scientific objectives of NOTT include characterizing (i) young planetary systems near the snow line, a critical region for giant …

be, us, au, gb, de (code pays fourni par la source)

Asgard/NOTT: first lab assembly and experimental results

Germain Garreau, Azzurra Bigioli, Romain Laugier, Bastien La Torre et autres

Asgard/NOTT is an ERC-funded project hosted at KU Leuven and is part of a new visitor instrumental suite, called Asgard, under preparation for the Very Large Telescope Interferometer (VLTI). Leveraging nulling capabilities and the long VLTI baselines, it is optimized for high-contrast …

be, fr, au, hu, de (code pays fourni par la source)

L-band nulling interferometry at the VLTI with Asgard/NOTT: status and plans

Denis Defrère, Romain Laugier, Marc-Antoine Martinod, Germain Garreau et autres

NOTT (formerly Hi-5) is the L'-band (3.5-4.0~microns) nulling interferometer of Asgard, an instrument suite in preparation for the VLTI visitor focus. The primary scientific objectives of NOTT include characterizing (i) young planetary systems near the snow line, a critical region for giant …

MARVEL: an update on the four-telescope dedicated radial velocity facility at the Mercator Observatory

Jacob Pember, Ioannis Argyriou, David Atkinson, Gerardo Ávila et autres

MARVEL is a new facility at the Roque de los Muchachos Observatory (La Palma) which comprises an array of four 0.8m telescopes, each feeding via fibre link into a single high-resolution spectrograph. The facility will provide dedicated target vetting and follow-up capability …

Asgard/NOTT: L-band nulling interferometry at the VLTI. II. Warm optical design and injection system

Germain Garreau, Azzurra Bigioli, Romain Laugier, Gert Raskin et autres

Asgard/NOTT (previously Hi-5) is a European Research Council (ERC)-funded project hosted at KU Leuven and a new visitor instrument for the Very Large Telescope Interferometer (VLTI). Its primary goal is to image the snow line region around young stars using nulling interferometry …

ru, be, fr, au, de (code pays fourni par la source)

BlackGEM: the wide-field multi-band optical telescope array

P. Groot, S. Bloemen, P. M. Vreeswijk, P. G. Jonker et autres

The BlackGEM array Phase I consists of three wide field, optical telescopes, located at the ESO La Silla Observatory, Chile. Each telescope is of a modified Dall-Kirkham design, using an 0.6m primary mirror and a 110 Mpix STA1600 CCD to give a …

nl, Afrique du Sud, be (code pays fourni par la source)