Performance of the PMAS 3D spectrophotometer

Martin M. Roth; Andreas Kelz

doi:10.1117/12.672091

27 June 2006 Performance of the PMAS 3D spectrophotometer

Martin M. Roth, Andreas Kelz

Proceedings Volume 6269, Ground-based and Airborne Instrumentation for Astronomy; 62690H (2006) https://doi.org/10.1117/12.672091
Event: SPIE Astronomical Telescopes + Instrumentation, 2006, Orlando, Florida , United States

Abstract

Unlike some integral field units (IFUs) in front of conventional slit spectrographs, PMAS is a dedicated fiber-optical integral field spectrograph, featuring two different types of IFUs to address both high spatial resolution and wide field-of-view (FoV) in a single instrument. The instrument was designed, built, and tested completely in-house at the Astrophysical Institute Potsdam from 1996 to 2000. It was commissioned at the Calar Alto 3.5m Telescope in May 2001. PMAS employs an all-refractive fiber spectrograph, built with CaF₂ optics, to provide good transmission and high image quality over the entire nominal wavelength range. A set of user-selectable reflective gratings provides low to medium spectral resolution in first order of approx. 1.5, 3.2, and 7 Å, depending on the groove density (1200, 600, 300 gr/mm). The standard IFU uses a 16×16 element lens array, which provides seeing-limited sampling in a relatively small field-of-view (FOV) in one of three magnifications (8×8, 12×12, or 16×16 arcsec², respectively). The additional fiber bundle IFU (PPak) expands the FOV to a hexagonal area with a footprint of 65×74 arcsec².

Citation Download Citation

Martin M. Roth and Andreas Kelz "Performance of the PMAS 3D spectrophotometer", Proc. SPIE 6269, Ground-based and Airborne Instrumentation for Astronomy, 62690H (27 June 2006); https://doi.org/10.1117/12.672091

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KEYWORDS

Telescopes

Spectrographs

Optical filters

Spectrophotometry

CCD cameras

Linear filtering

Sensors

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