PMAS (Potsdam MultiAperture Spectrophotometer)

PMAS at the 3,5m telescope

PMAS (Potsdam MultiAperture Spectrophotometer), is an integral field unit developed in the AIP (P.I. M.M.Roth), currently mounted in the CAHA 3.5m telescope.

Available at: Cassegrain focus of the Zeiss 3.5 m reflector (fiber fed from the Cassegrain Front End).

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In a nutshell

Instrument name PMAS
Observing technique PPAK (hexagonal) or LArr (square) IFU bundles
Resolution (LArr) 900 - 9000 (first order) or 5700 - 24000 (second order)
Resolution (PPAK) 600 - 6000 (first order) or 3800 - 16000 (second order)
LArr magnifications 0.5 - 0.75 - 1.0 (with FOVs 8"x8" - 12"x12" - 16"x16")
Wavelength range 0.35 to 1 μm
Gratings U,V,R,I,J-1200        U,V,R-600        U,V-300
Detector type
Detector and pixel size
4k x 4k / 15 μm pixel
FOV PPAK: 72" hexagonal   -    LArr: 8"x8", 12"x12" or 16"x16"
A&G FOV 3.4 x 3.4 arcmin


 Observing with PMAS

Preparing observations During observations
After observing
Requesting observing time Observing manual Data reduction tool (S.F. Sánchez)
Instrument overview Troubleshooting Online reduction package
Exp. time calculator  Log sheets  
Grating table    


More information

API PMAS webpage

Publications and CALIFA survey

Reference article
CALIFA survey presentation
CALIFA survey webpage

Calar Alto Press Releases

Public Data Release: The widest spectrocopic survey of the Orion Nebula
The beautiful death
The CALIFA project starts up
The CALIFA survey unveils the evolution of galaxies in space and time
CALIFA: The local extragalactic universe unveiled
An unprecedented view of two hundred galaxies of the local Universe
IZw18: the galaxy that reveals the universe's history
UPDATE: "Halloween pumpkin" video and images from Calar Alto
CALIFA Project culminates with the third data release
Stellar formation shoots are observed in a type of galaxy where, in theory, stars are no longer born
New clues on the formation process of Milky Way-like galaxies
Library of galaxy histories reconstructed from motions of stars
Best 2017 PhD in Astronomy uses CALIFA data
A nearby green pea galaxy, analog to the first galaxies, shows how the young Universe became illuminated
Galaxies co-rotate with their moving neighbors