Observing at the VTT

View of ChroTel from the 2nd floor of the VTT right after a blizzard in Feb. 2014

Observing Season:

The VTT observing season typically starts in April and ends at the beginning of November (for obvious reasons - see picture to the left). Application deadlines are mid-January. 


Due to changes in setup and instrumentation, the observing season 2019 will be split into two halves: April 28 - beginning of August and from mid August - end of November, 2019. 


VTT/GREGOR – Call for Observing Proposals 2019A (May 1 – Aug 1)

We invite proposals for observing campaigns at VTT and/or GREGOR in 2019, with a submission deadline of January 18, 2019, 23 UT. Both telescopes will operate with 2 observing seasons in 2019 and the available instrumentation differs in both seasons. This call is for the first season, another call may be expected in May.


Instrumentation available for the first season is:


•    The chromospheric grating for spectroscopy in up to 3 spectral regions simultaneously
•    Own instrument setups

Instrumentation foreseen for the second season is:


•    The standard grating. Own instrument setups


Consortium members who wish to use LARS should contact R. Schlichenmaier (with CC to T. Kentischer and L. Kleint) before proposal submission.


Apply for observing time:

The VTT is open to external users. The observing time at the VTT has various quotas. All user groups are invited to apply for observing campaigns via one of the following TACs.


Spanish time (CAT Solar)

Contact Solar Cat at IAC for more information.

German time (split between the AIPMPS, and KIS)

Contact tac@leibniz-kis.de for more information.


In 2019A, 20 days are available. Send proposals to east-tac@astro.su.se. Deadline 20 January.


A common observing time allocation process for European Solar Telescopes was one of the achievements of the trans-national ACCESS program of OPTICON (FP7). This European Time Allocation Committee was established by EAST. The EAST TAC provides a common standard of review for all observing proposals. Observing time quotas for all European telescopes and instruments can be allocated by the EAST TAC. The EAST TAC allocates SOLARNET ACCESS time and CCI international time. SOLARNET is the solar successor of OPTICON, and started in April 2013. Main objectives are to provide access to European Solar telescopes and instruments, and to develop data pipelines such that science-ready data is easily available for users of the ACCESS program. For the VTT observing campaigns with a typical length of 10 days are allocated. For SOLARNET campaigns, travel grants are also provided.


Observing Proposals

External and new users are explicitly encouraged to apply for observing time through one of the above programs. Please contact  Thomas Kentischer (tk@kis) if you are interested in observing at the VTT or if you need help. 

Proposal forms 2019 are available in the right column.

Deadlines for applications to the 2019 observing season are: