Fundación Galileo Galilei - INAF Telescopio Nazionale Galileo 28°45'14.4N 17°53'20.6W 2387.2m A.S.L.

AOT 43 Call for Proposals. Deadline Wednesday November 25th, 2020

also featuring NOT time

AOT 43 (2021A) is now open for proposals.

Applications for observing time for the periods

April 1st, 2021 - September 30th, 2021

are solicited and should be submitted by
Wednesday, 25th November, 2020, 12:00 UT.

Despite the difficult times we are experiencing, the TNG is regularly operating. At time of writing, all the observations are in service mode, but we are confident to resume the visitor mode in 2021.

The available time offered at TNG via INAF-TAC is 26 (twenty-six) nights in this call. This budget can increase if not all the nights offered in other calls will be effectively allocated by the respective TACs. The foreseen schedule breakdown is reported at the bottom.

LARGE and LONG-TERM PROGRAMS cannot be requested answering the AOT43 call. In particular, a Long-Term program on the optical counterparts of gravitational wave events is already running at TNG and proposals on this topic will not be accepted anymore. The PIs of the AOT37 Large Programs are requested to submit a report on the activities carried out in the previous semesters (deadline Wednesday, 16th December, 2020). Instructions will follow separately. The TAC could revise the amount of time initially allocated to the Large Programs and therefore the number of offered nights to normal proposals could vary accordingly.

We will be accepting (few) Directory Discretionary Time proposals during the whole semester (, which will be judged by the TNG staff in few days. These observations will be performed in Service Mode only.

TNG is a 3.58-m optical/infrared telescope located at Roque de Los Muchachos Observatory in the island of La Palma (Canary Islands). Its primary mirror is corrected by Active Optics and it is equipped with instruments for imaging and spectroscopy, spanning the optical and near infrared wavelengths range.
The offered instruments are: HARPS-N, NICS, DOLORES and GIANO-B (GIANO in Nasmyth B).
The observing mode GIARPS, simultaneously combining HARPS-N and GIANO-B, is also offered (see below).
For details, visit

REM is a 60-cm robotic telescope located at La Silla ESO site (Chile) which can observe simultaneously with a visible and an infrared camera. The observations will be carried out in unmanned, queuing mode. INAF-TAC will allocate up to 1000 hours of observations.
REM is equipped with ROS2 visible camera and REMIR infrared camera. The two are observing simultaneously thanks to a dichroic.
ROS2 will produce simultaneous images in the four Sloan-like passbands g, r, i, z. Charged time is therefore not the sum of ROS2 and REMIR, but the greater between the two.
For details, see

NOT is a 2.56-m telescope, also located at Roque de Los Muchachos Observatory, next to the TNG. Offered instruments are ALFOSC (UV-optical imaging, polarimetry and low-resolution spectroscopy), NOTCam (NIR imaging and low-resolution spectroscopy), FIES (High-resolution, high-stability optical spectroscopy), MOSCA (High-resolution, high-efficiency UV-optical imaging), STANCam (Standby CCD imager), DIPol-UF (double image polarimeter, visitor instrument).
For details, see


Application forms and detailed instructions can be downloaded from the TNG web pages (

Following new ideas on the refereeing process, the PIs (ex officio) and CoIs (from 2 to 5) could be used as external reviewers for the other proposals in this or next call (Box 16).

Incomplete computation of the overheads, poor target visibility in the semester, too dense monitoring are recurrent weaknesses pointed out when assessing the technical feasibility. Important information for a more careful preparation of the proposals are reported at

Objects included in the TNG Protected Target List ( cannot be requested.

All proposals will be judged strictly on their scientific merit.


Ennio Poretti

Telescopio Nazionale Galileo
Fundacion Galileo Galilei - INAF