Prof. Dr. rer. nat. Alfred Krabbe

Barbara Klett

Dr.-Ing. Thomas Keilig

Deputy SMO Director (Kalifornien)

Standortleiter AFRC & SOFIA Teleskop Manager
Dipl.-Ing. Michael Hütwohl

Standortleiter ARC & und Facility Scientist
Dr. rer. nat. Jürgen Wolf

Technology Advisor
Prof. Dr.-Ing. Jörg Wagner

Bildungs- und Öffentlichkeitsarbeit
Dr. rer. nat. Dörte Mehlert

Deutsches SOFIA Institut
Pfaffenwaldring 29
70569 Stuttgart

Tel. +49 (0)711/685-62379
Fax +49 (0)711/685-63596


SOFIA Observing Cycle 4

Cycle 4 Call for Proposal Phase 1 completed

The submission deadline for Cycle 4 observation proposals has passed. The peer review processes for both US and German queues has been completed. See observation times awarded to proposals by the Time Allocation Committee.


Call for German Proposals

The Stratospheric Observatory for Infrared Astronomy (SOFIA) is pleased to invite proposals for its fourth regular observation cycle which is planned to take place from February 2016 through January 2017.

About twice the amount of observing time is offered compared to the previous cycle.

The official Call for German Proposals document is available for download from this website. It containts all necessary information in order to prepare and submit a proposal for scientific observations during Cycle 4.

SOFIA Observing Cycle 4 Call for German Proposals
(version 2.0 released June 16, 2015)

Additional information about the US-led Cycle 4 Call for Proposals can be found on the Cycle 4 Call for Proposals website of our partner organization USRA.

If you are preparing a SOFIA Cycle 4 Observing proposal using HAWC+, please note the following critical information.

The correct overheads for HAWC+ were incorporated into v2_8_3 of the SOFIA Proposal Tool (SPT), released on June 4, 2015. Earlier versions of SPT significantly understimate these overheads. Therefore users proposing HAWC+ observations should use SPT v2_8_3 to prepare and submit their proposals.

Unfortunately, this change was not included in the list of formal updates released on June 8, 2015 . We apologize for the late notice, and the inconvenience this may cause.  If you have any questions, please contact the SOFIA help desk at sofia_help@sofia.usra.edu

Best Regards,
SOFIA User Support Group

Cycle 4 Schedule

The nominal schedule for the Cycle 4 observing program is as follows:

May 7, 2015 Release of Call for German Proposals.
June 16, 2015 Call for Proposals update
July 10, 2015, 23:59 CEST Proposal Submission deadline
October 2015 Anticipated Announcement of Selections
Feb 2015 - Jan 2017 Cycle 4 observing period



For Cycle 4, the following instruments will be available: EXES, FIFI-LS, FLITECAM, FORCAST, FPI+, GREAT, HAWC+, HIPO and the FLITECAM/HIPO combination. The instrument modes available for Cycle 4 observations are listed in the Call for Proposals and described in details in the Observer's Handbook. The instrument properties are summarized on the instrument pages.

Reserved Observations Catalogs (ROCs)

Summary tables containing the reserved observations for each instrument are included as appendices in the Call for Proposals. Generally, these may not be proposed for in Cycle 4. The policies are described in Section 1.7.1 of the Call for Proposals document.

Duplication Checking

Duplications of existing observations, or of observations approved for Cycle 3 but not yet executed, need to be justified explicitly. Proposers should search the SOFIA Science Archive for completed observations and the AOR Search page for approved Cycle 3 observations to check for potential duplications. As noted above, the ROC tables in the Call for Proposals should also be checked for disallowed observations.

Exposure Time Estimation