The BlueMUSE calibration unit: phase-A studies

Martin M. Roth; Peter M. Weilbacher; Andreas Kelz; Kalaga Madhav; Eloy Hernandez; Johan Richard; Rémy Giroud; Roland Bacon

doi:10.1117/12.2629630

29 August 2022 The BlueMUSE calibration unit: phase-A studies

Martin M. Roth, Peter M. Weilbacher, Andreas Kelz, Kalaga Madhav, Eloy Hernandez, Johan Richard, Rémy Giroud, Roland Bacon

Author Affiliations +

Proceedings Volume 12184, Ground-based and Airborne Instrumentation for Astronomy IX; 121845S (2022) https://doi.org/10.1117/12.2629630
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

BlueMUSE is a novel instrument under development for the ESO VLT, that builds on the legacy of MUSE, however with a blue wavelength range, a larger field-of-view (FoV), and higher spectral resolution. Driven by high-profile and unique science cases, the requirements present new challenges to the development of the instrument, although the fundamental layout will be based on the successful modular structure of the classical MUSE. In order to achieve the expected mean spectral resolution of R=3600 and radial velocity measurement accuracy of better than 1 km/s, as well as spectrophotometric performance, BlueMUSE must be equipped with a calibration unit to perform accurate wavelength, flat-field, and geometrical calibration. Lessons learned from MUSE show that the variation of the line-spread-function (LSF) across the FoV as a consequence of the field-splitter and image slicer layout requires a methodology to accurately measure the LSF as a function of x and y. Moreover, classical spectral line lamps that have been used traditionally for wavelength calibration present the problem of a scarce emission line coverage in the blue. BlueMUSE has entered pre-Phase-A in 2022. We report first results from conceptual design studies to address these challenges, in particular concepts of Fabry-Perot based tunable frequency combs, and as an alternative approach novel concepts with laser frequency combs or micro-ring resonator based combs in the blue.

Citation Download Citation

Martin M. Roth, Peter M. Weilbacher, Andreas Kelz, Kalaga Madhav, Eloy Hernandez, Johan Richard, Rémy Giroud, and Roland Bacon "The BlueMUSE calibration unit: phase-A studies", Proc. SPIE 12184, Ground-based and Airborne Instrumentation for Astronomy IX, 121845S (29 August 2022); https://doi.org/10.1117/12.2629630

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available