European ARC Announcements

European ARC Announcements are provided by ESO and the European ALMA Nodes that together make up the European ALMA Regional Centre Network.

Development study on wideband low noise amplifiers kicks off

Published: 21 Sep 2023

To reach the ambitious goal of the ALMA Wideband Sensitivity Upgrade (WSU) to quadruple the instantaneous bandwidth from 4 to 16 GHz a wide range of receiver components need to be upgraded including the junctions, the intermediate frequency (IF) hybrids and the Cryogenic Low Noise Amplifiers (CLNA). The latter component has a critical role, as its location early in the analogue part of the signal chain means it has a substantial contribution to the overall receiver noise and affects the quality of sideband separating receivers. Moreover, the IF bandwidth of the CLNA is often the limiting factor for the overall receiver bandwidth, making the CLNA one of the key components to upgrade for the WSU. The same CLNA can be installed in most upgraded receivers.

I-TRAIN #19: Introduction to Data Combination

Published: 21 Sep 2023

The European ARC Network invites users to an online training on Introduction to Data Combination on September 21st, 11:00 CET [Zoom link].

Development study on streaming visibility processing kicks off

Published: 15 Sep 2023

A new development study, led by ASTRON in Dwingeloo (The Netherlands) will investigate the possibility of implementing initial processing steps of ALMA raw data from the correlator in a streaming process of the visibilities. This study builds synergies with the LOFAR and SKA telescopes, where similar processes will be applied by the software engineers at ASTRON. In particular, the Default PreProcessing Pipeline (DP3) is a modular framework that can be adapted to be used on ALMA data.

CalMS Service unavailable during European ARC cluster downtime

Published: 17 Aug 2023

The European ARC CalMS service ( will be unavailable from 17/08/2023 - 23/08/2023 and 16/10/2023 - 30/10/2023.

New Band 2 ALMA receivers that will probe our cosmic origins successfully tested

Published: 14 Aug 2023

An international team of astronomers and engineers at the Atacama Large Millimeter/submillimeter Array (ALMA) have made the first measurements using new receivers installed on multiple ALMA antennas. The receivers allow to observe within the final frequency range — with wavelengths between 2.6 to 4.5 millimeters (67-116 GHz) — for which it was designed. Band 2 opens a new window into our cosmic origins, allowing measurements that reveal how distant stars and galaxies form, all the way down to the origins of planets and the building blocks of life.  

CalMS Service celebrates more than 3000 served MOUSs

Published: 11 Aug 2023

The demand for the European ARC CalMS service ( has been roughly constant since the beginning of 2023 at 100 MOUSs/month. The 3000th MOUS was served at the end of July 2023 (counting since January 2020). The service will continue as it is for the foreseeable future.

Job Advertisement: Postdoctoral Support Position at Allegro

Published: 06 Jul 2023

Allegro, the Netherlands node of the European ALMA Regional Centre (ARC) at Leiden Observatory, invites applications for one or more postdoctoral support position(s). The position offers the opportunity for research at one of the major centres of astronomy in the Europe as well as an in-depth involvement in the development and operations of ALMA.

The deadline for applications is Sept 15, 2023.

ALMA school pre-announcement

Published: 21 Jun 2023

The European ALMA Regional Centre network is organising an ALMA School for ALMA users, hosted by the UK Node on 10th - 14th June 2024 in Manchester. The school is designed to provide training on a broad range of aspects related to ALMA, including interferometry, data calibration and imaging, the ALMA archive, analysis techniques, ALMA science and future ALMA developments.

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