1 AUG 2024

1) The RTTAC announces the Call for Telescope Time proposals for the BTA-6m, ZTSh-2.6m CrAO, SAI MSU-2.5m, Zeiss-2.0m, Zeiss-1.0m, RATAN-600, RT-22 CrAO, RT-22 LPI and BSA LPI for 2025-1 semester. The deadline for submitting these proposals is 23:59:59 MSK (UTC+3), September 10, 2024.

1 FEB 2024

1) The RTTAC announces the Call for Telescope Time proposals for the BTA-6m, ZTSh-2.6m CrAO, SAI MSU-2.5m, Zeiss-2.0m, Zeiss-1.0m, RATAN-600, RT-22 CrAO, RT-22 LPI and BSA LPI for 2024-2 semester. The deadline for submitting these proposals is 23:59:59 MSK (UTC+3), March 10, 2024.

Proposals for the multi-mode spectrograph at the prime focus SCORPIO-2 are temporarily not accepted due to the repair and preventive maintenance works on this instrument in the second semester of 2024.

30 JUL 2023

1) The RTTAC announces the Call for Telescope Time proposals for the BTA-6m, ZTSh-2.6m CrAO, SAI MSU-2.5m, Zeiss-2.0m, Zeiss-1.0m, RATAN-600, RT-22 CrAO, RT-22 LPI and BSA LPI for 2024-1 semester. The deadline for submitting these proposals is 23:59:59 MSK (UTC+3), September 10, 2023.

30 JUL 2021

1) The RTTAC announces the Call for Telescope Time proposals for the BTA, RATAN-600, Zeiss-1000, Zeiss-2000, ZTSh and RT-22 (CrAO) for 2022-1 semester. The deadline for submitting these proposals is 23:59:59 MSK (UTC+3), September 10, 2021.
2) Compared to the half-year period 2021-2, there are some changes in the application form. Please read the rules carefully.
3) The telescope time quota at the l-m Zeiss-l000 telescope of SAO RAS was increased from l0% to 25% for external proposals.

DEC 1, 2018

The schedule for the 6-meter telescope for the 1st half of 2019 is here.

DEC 1, 2018

The schedule for RATAN-600 for the 1st half of 2019 is here (RUS).

AUG 1, 2018

We start accepting time applications for the 1st half of 2019 for the BTA, RATAN-600, and small telescopes. Please go to the start page for information. More...

JUN 1, 2018

The schedule for the 6-meter telescope for the 2nd half of 2018 is here.

JUN 1, 2018

The schedule for RATAN-600 for the 2nd half of 2018 is here.

FEB 1, 2018

We start accepting time proposals for the 2nd half of 2018 for the BTA, RATAN-600, and small telescopes. Please go to the start page for information. More...

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DEC 1, 2017

The schedule for the 6-meter telescope for the 1st half of 2018 is here.

DEC 1, 2017

The schedule for RATAN-600 for the 1st half of 2018 is here.

AUG 1, 2017

We start accepting time applications for the 1st half of 2018 for the BTA, RATAN-600, and small telescopes. Please go to the start page for information. More...

MAY 31, 2017

The RATAN-600 schedule for the 2nd half of 2017 is published. More...

MAY 31, 2017

The BTA schedule for the 2nd half of 2017 is published. More...

FEB 1, 2017

We start accepting time applications for the 2nd half of 2017 telescope BTA, RATAN-600 and small telescopes. Please note the changes in the form of applications. More...