The SOFIA far-infrared spectrometer FIFI-LS: Spearheading a post Herschel era

Sebastian Colditz, Fabio Fumi, Norbert Geis, Rainer Hönle, Randolf Klein, Alfred Krabbe, Leslie Looney, Albrecht Poglitsch, Walfried Raab, Maureen Savage, Felix Rebell, Christian Fischer

Research output: Chapter in Book/Report/Conference proceedingConference contribution


FIFI-LS (Field-Imaging Far-Infrared Line Spectrometer) is an imaging spectrograph for SOFIA comprised of two medium resolution (R∼2200) grating spectrometers feeding two 16x25 pixel detector arrays, which enable simultaneous line observations across two wavelength ranges (42-110 μm and 110-210μm) each across a field of view of 5x5 pixel. FIFI-LS will be the extragalactic spectroscopic workhorse for SOFIA. FIFI-LS has enough sensitivity to observe a substantial sample of nearby galaxies. It also has the right combination of wavelength range and spatial resolution to carry out unique new observations beyond those possible with Herschel, Spitzer, ISO and IRAS. As the effective sensitivity of FIFI-LS is only about a factor of 3-5 lower than the PACS spectrometer onboard Herschel, mainly due to an enhanced multiplexing advantage, FIFI-LS will build upon recent exciting scientific results and spearhead the post-Herschel far-infrared era. FIFI-LS is scheduled for commissioning onboard SOFIA in early 2014. An account on the instrument and its current stratus will be presented.

Original languageEnglish (US)
Title of host publicationGround-Based and Airborne Instrumentation for Astronomy IV
StatePublished - 2012
EventGround-Based and Airborne Instrumentation for Astronomy IV - Amsterdam, Netherlands
Duration: Jul 1 2012Jul 6 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


OtherGround-Based and Airborne Instrumentation for Astronomy IV


  • Far-infrared
  • Integral field spectroscopy
  • Spectrometer

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


Dive into the research topics of 'The SOFIA far-infrared spectrometer FIFI-LS: Spearheading a post Herschel era'. Together they form a unique fingerprint.

Cite this