Call for Proposals - Deadline 26 September 2024 (15:00 UT)


Call for Proposals - Deadline 26 September 2024 (15:00 UT)

The following deadline will be on February 4 2025.


The 100-m radio telescope of the Max-Planck-Institut für Radioastronomie and the data reduction facilities are available to all qualified scientists. The directors of the institute make observing time available to applicants based on the recommendations of the Program Committee for Effelsberg (PKE), which judges the scientific merit (and technical feasibility) of the observing proposals.

Information about the Program Committee, the allocation of observing time etc. can be seen at the Effelsberg Program Committee web page.

There are three deadlines a year, normally around February 1st, June 1st, October 1st.

The Effelsberg telescope is one of the World's largest fully steerable instruments. This extreme-precision antenna is used exclusively for research in radio astronomy, both as a stand-alone instrument as well as for Very Long Baseline Interferometry (VLBI) experiments.

With the advent of the new subreflector, observations from the secondary focus (especially at frequencies > 10 GHz) gain from a much higher sensitivity and flatter gain-elevation curves.
The new hexapod driving system leads to a faster and more precise focusing of all receiving systems in the primary and secondary focus.

Access to the telescope is open to all qualified astronomers. Use of the instrument by scientists from outside the MPIfR is strongly encouraged. The institute can provide support and advice on project preparation, observation, and data analysis.

Opticon-RadioNet-Pilot Transnational Access Programme

The new Opticon-RadioNet-Pilot (ORP) project (see includes a coherent set of Transnational Access (TA) programs aimed at significantly improving the access of European astronomers to the major astronomical infrastructures that exist in, or are owned and run by, European organizations.

Astronomers who are based in the EU and the Associated States but are not affiliated to a German astronomical institute, may also receive personal aid from the Transnational Access (TA) Program of the ORP. This will entail free access to the telescope, as well as financial support of travel and accommodation expenses for one of the proposal team members to visit the Effelsberg telescope for observations.

One – in exceptional cases more – scientists who are going to Effelsberg for observations can be supported, if the User Group Leader (i.e., the PI – a User Group is a team of one or more researchers) and the majority of the users work in (a) country(ies) other than the country where the installation is located. Only user groups that are allowed to disseminate the results they have generated under this program may benefit from the access.

For more details see .

After completion of their observations, TA supported scientists are required to submit their feedback to the ORP project management and the EU. Publications based on these observations should be acknowledged accordingly:

The research leading to these results has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 101004719 [ORP].


Observing modes
Possible observing modes include spectral line, continuum, pulsar, and VLBI. Available backends are various FFT spectrometers (with up to 65536 channels), a digital continuum backend, several pulsar systems (coherent and incoherent dedispersion), and two VLBI terminals (dBBC and RDBE type). For information look here or contact a local astronomer.

Receiving systems cover the frequency range from 0.3 to 96 GHz. The actual availability of the receivers depends on technical circumstances and proposal pressure. A description of the receivers, information about calibration parameters, system temperature, sensitivity, etc. can be found here.

How to submit
Applicants should use the NorthStar proposal tool for preparation and submission of their observing requests. North Star is reachable at . No other proposal submission will be accepted.

For VLBI proposals special rules apply:
For proposals which request Effelsberg as part of the European VLBI Network (EVN) see:

Information on proposals for the Global mm-VLBI network can be found on

Multi-Facility Call For Proposals OPTICON-RadioNet PILOT

Other proposals which ask for Effelsberg plus (an)other antenna(s) should be submitted twice, one to the MPIfR and a second to the institute(s) operating the other telescope(s) (eg. to NRAO for the VLBA).
For more information about observations together with NRAO facilities (e.g., HSA observations) see


Publications based on Effelsberg Observations should be acknowledged:
*Based on observations with the 100-m telescope of the MPIfR (Max-Planck-Institut für Radioastronomie) at Effelsberg.


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