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

AOT 45 Call for Proposals. Deadline Tuesday November 30th, 2021


AOT 45 (2022A) is now open for proposals.
Applications for observing time for the period

April 1st, 2022 - September 30th, 2022

are solicited and should be submitted by
Tuesday, November 30th, 2021, 12:00 UT.

The persistent eruption of the volcano Cumbre Vieja forced us to anticipate the upgrade of the Telescope Control System, originally foreseen in April 2022, to these days. Consequently, The TNG will remain closed from November 4th for 4 weeks. In this way we hope to minimise the loss of observation time.

On the other hand, we can offer the full semester AOT45. Thus, the available time offered at TNG via INAF-TAC is 37 (thirty-seven) nights in this call. We encourage applicants to submit proposals asking a row of consecutive nights to be done in visitor mode. The 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 AOT45 call. This possibility will be re-opened in AOT46. Be prepared.

LONG-TERM PROGRAMS cannot be requested answering the AOT45 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).
SiFAP2 is also offered as a visitor instrument (see below).
The observing mode GIARPS, simultaneously combining HARPS-N and GIANO-B, is also offered (see below).
For further 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


Ennio Poretti

Telescopio Nazionale Galileo
Fundacion Galileo Galilei - INAF