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

AOT 48 Call for Proposals. DEADLINE SUBMISSION EXTENSION TO Monday June 5th, 12:00 UT

also featuring LARGE PROGRAMS


AOT48 (2023B) is now open for proposals.
Applications for observing time for the period

October 1st, 2023 - March 31st, 2024

are solicited and should be submitted by
Friday, June 2nd, 2023, 12:00 UT.

The available time offered in this call at TNG via INAF-TAC is 104 nights, 75 of which are reserved to exo-planetary research programs (see special notices below) and 29 are for other science programs. 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 can be requested answering the AOT48 call (see special notices below), both for exo-planetary and other science.

LONG-TERM PROGRAMS can not be requested answering the AOT48 call.

We will be accepting (few) Director's Discretionary Time proposals during the whole semester (, which will be judged by the TNG staff in a 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. PIs should explicitly inform their CO-Is that they will have to accept the review of other proposals. (Box 16).

Incomplete computation of the overheads, poor target visibility in the semester and, in particular, dense monitoring are recurrent weaknesses pointed out when assessing the technical feasibility. Too dense cadence (like, e.g., 1 visit per week or less) will be considered not feasible due to scheduling issues.

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

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

The present list of Protected Targets will be effective up to the end of AOT 47. New Protected Targets accepted by TAC will form a new list. (

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


Adriano Ghedina

Telescopio Nazionale Galileo
Fundación Galileo Galilei - INAF