TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - nicht begutachtet (unreviewed)
A1  - Durán, Carlos A.
A1  - Güsten, Rolf
A1  - Risacher, Christophe
A1  - Görlitz, Andrej
A1  - Klein, Bernd
A1  - Reyes, Nicolas
A1  - Ricken, Oliver
A1  - Wunsch, Hans-Joachim
A1  - Graf, Urs U.
A1  - Jacobs, Karl
A1  - Honingh, Cornelia E.
A1  - Stutzki, Jürgen
A1  - Lange, Gert de
A1  - Delorme, Yan
A1  - Krieg, Jean-Michel
A1  - Lis, Dariusz C.
T1  - 4GREAT -- a four-color receiver for high-resolution airborne terahertz spectroscopy
N2  - 4GREAT is an extension of the German Receiver for Astronomy at Terahertz frequencies (GREAT) operated aboard the Stratospheric Observatory for Infrared Astronomy (SOFIA). The spectrometer comprises four different detector bands and their associated subsystems for simultaneous and fully independent science operation. All detector beams are co-aligned on the sky. The frequency bands of 4GREAT cover 491-635, 890-1090, 1240-1525 and 2490-2590 GHz, respectively. This paper presents the design and characterization of the instrument, and its in-flight performance. 4GREAT saw first light in June 2018, and has been offered to the interested SOFIA communities starting with observing cycle 6.
KW  - far-infrared astronomy
KW  - airborne astronomy
KW  - receivers
KW  - submillimeter-wave technology
KW  - superconducting devices
KW  - SIS mixer
KW  - HEB mixer
KW  - heterodyne spectroscopy
UN  - https://nbn-resolving.org/urn:nbn:de:hbz:1044-opus-52667
U6  - https://doi.org/10.48550/arXiv.2012.05106
DO  - https://doi.org/10.48550/arXiv.2012.05106
AX  - 2012.05106
SP  - 11
S1  - 11
PB  - arXiv
ER  -