Observing Season and applications for observing time

General Info

We have carried out a major redesign of the GREGOR optical setup. 2020A is the commissioning and science verification phase, during which we carry out joint observations with data sharing. The preliminary schedule to start observing in May had to be delayed due to COVID-19. As of June, GREGOR is still in the instrument alignment phase. We will start observing as soon as possible. The general plan is:

- 1 month:  technical commissioning by KIS.

- ~2 months: science verification jointly by KIS, IAC, AIP.

Special rules apply to 2020A. Due to the corona virus, all observing dates are TBD and will be adapted once the situation stabilizes. 2020B will be carried out in "regular" PI mode and we will open a call for proposals later in 2020.


The conditions for the joint observations in 2020A are:

- The partner institutes have decided to carry out a joint science verification phase in 2020A. This means that all data will be shared among all PIs and collaborations are highly encouraged. A technical verification will have been carried out, but considering that the whole optics lab is completely redesigned, technical issues could occur at times, therefore all observations are “shared risk”.
- Publications: All data can be used freely. We expect everybody to follow good scientific practice (=include everybody who contributed significantly). Because of the large effort for the redesign and the implementation, T. Berkefeld and L. Kleint shall be included as Co-authors (unless they wish not to be on the paper) on any paper resulting from data taken during the science verification phase. The required acknowledgement and citations are listed below.



Required acknowledgement and citations: 

The 1.5-meter GREGOR solar telescope was built by a German consortium under the leadership of the Leibniz-Institute for Solar Physics (KIS) in Freiburg with the Leibniz Institute for Astrophysics Potsdam, the Institute for Astrophysics Göttingen, and the Max Planck Institute for Solar System Research in Göttingen as partners, and with contributions by the Instituto de Astrofísica de Canarias and the Astronomical Institute of the Academy of Sciences of the Czech Republic. The redesign of the GREGOR AO and instrument distribution optics was carried out by KIS whose technical staff is gratefully acknowledged.


GREGOR papers to be cited (when referring to GREGOR):

Schmidt et al. 2012, AN 333/9, 796

Kleint et al. 2020, A&A, in press (https://arxiv.org/abs/2006.11875)

plus the respective instrument papers.



Science verification proposals:

As discussed during our joint telecon, we ask all interested observers to submit a science case (no long science justification needed). There should be sufficient details, such that the observing program could be carried out by any observer. The GREGOR proposal template can be used:

 <GREGOR tex proposal template for science verification>

 <GREGOR pdf preview of template>

 The deadline for these "proposals" is April 6, in spite of Corona, such that we are immediately ready once the restrictions are lifted and observations can start.



SOLARNET during science verification:

We have decided to open the access to the first light phase to interested parties within SOLARNET. SOLARNET proposals can be submitted for the science verification phase and the proposal team will have the same rights and duties as all parties during this phase. This specifically means that the SOLARNET PI will get access to all data from the science verification phase, but also his/her data is to be shared with everybody. The SOLARNET PI will be invited to participate in the science discussions among partners and is encouraged to collaborate on different data sets. The co-authorship rules (T. Berkefeld, L. Kleint) and the required citations and acknowledgement also apply. Please use the above proposal template to apply for SOLARNET time and note that the proposal deadline is April 19.



Options for telescope access

CCI international time program (ITP):

5% of the telescope time are reserved for international access to all solar telescopes on the Canary Islands (GREGOR, VTT, THEMIS). The observing time is assigned by the EAST TAC. For ITP time, applications must include researchers with affiliations in at least two of the following countries: Spain, UK, Germany, France, Italy, Finland. Contact Dan Kiselman or Lucia Kleint for more information.

Spanish time (solar CAT)

See www.iac.es/OOCC/solar-cat/ for more information. According to international agreements, 20% of the observing time is reserved for assignment by the Spanish solar CAT. Presently, there are no restrictions on nationality to apply for GREGOR and VTT time through the solar CAT.


A total of 40 days (GREGOR) or 20 days (VTT) are available for SOLARNET observers in 2020. The observing time is assigned by the EAST TAC.

German time

(split 20%/20%/60% between the AIPMPS, and KIS, leading to effective observing times of 15%/15%/45% of the total available time). Each institute has guaranteed observing time at GREGOR and VTT. KIS decided to open their observing time with no restriction on nationality/institute provided that at least one Co-I on the observing proposal is from KIS. Contact tac@leibniz-kis.de for more information.




GREGOR Observing plan 2019 (updated Oct 3, 2019):



GREGOR Observing plan 2018 (updated Oct 3, 2018):