AOT 44 Call for Proposals. Deadline Monday May 24th, 2021

also featuring NOT time

AOT 44 (2021B) is now open for proposals.
Applications for observing time for the period

October 1st, 2021 - March 31st, 2022

are solicited and should be submitted by
Monday, 24th May, 2021, 12:00 UT.

Despite the difficult times we are still experiencing, the TNG is regularly operating in the 25th year from its inauguration.
At time of writing, most of the observations are still in service mode, but runs in visitor mode are possible and encouraged.

The available time offered at TNG via INAF-TAC is 28 (twenty-eight) 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. All proposals will be judged strictly on their scientific merit.

LARGE PROGRAMS cannot be requested answering the AOT44 call.

LONG-TERM PROGRAMS can be requested answering the AOT44 call.

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.

New 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.

Queueing mode is not available. Filler programs cannot be implemented.

Important information for a more careful preparation of the proposals are reported at

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

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


Ennio Poretti

Telescopio Nazionale Galileo
Fundacion Galileo Galilei - INAF