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

AOT 41 Call for Proposal. Deadline Monday November 18th, 2019

also featuring NOT time

AOT 41 (2020A) is now open for proposals.

Applications for observing time for the periods

April 1st, 2020 - September 30th, 2020

are solicited and should be submitted by
Monday, 18th November, 2019, 12:00 UT.

The available time offered at TNG via INAF-TAC is 61 (sixty-one) nights in this call. This offer can be increased if not all the nights assigned to other calls will be effectively allocated by the respective TACs. The foreseen schedule breakdown is reported at the bottom.

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 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, polarimetry and low-resolution spectroscopy), FIES (High-resolution, high-stability optical spectroscopy), MOSCA (High-resolution, high-efficiency UV-optical imaging), STANCam (Standby CCD imager).
For details, see
The Italian community can request up to 10 (ten) nights on the basis of the exchange time agreement (see below).


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

Further important information for the proposal preparation is reported at

Moreover, objects included in the TNG Protected Target List ( cannot be requested.

All proposals will be judged strictly on their scientific merit.



Large-Program proposals cannot be submitted answering the AOT41 call. The PIs of the ongoing Large Programs are requested to submit a progress report on the activities carried out in the previous semesters (deadline Wednesday, 19th December, 2019). Instructions will follow separately. The TAC could revise the amount of time initially allocated to the Large Programs (see the AOT 41 time breakdown) and therefore the number of offered nights to normal proposals could vary accordingly.


In this call the TNG re-opens observing time to less time-demanding programs, but still having the need to extend over a few consecutive semesters to be completed and/or to ensure the necessary follow-up.

The "Long Term" programs must be able to strictly address major open problems in modern astrophysics, characterizing the TNG role in the next 1-2 years. The basic features of these "Long Term" programs are:

  • All topics in modern astronomy are eligible.
  • Programs can only use any of the permanently installed instruments at TNG.
  • Programs may extend up to 3 semesters, and use a maximum of 30 hours per semester.
  • The Principal Investigator (PI) and least 50% of the participants must be affiliated to Italian Institutions. In the field of optical/infrared observations of Target of Opportunity objects, a worldwide collaboration is particularly encouraged. We emphasize the possibility to submit joint proposals between the Italian and Nordic communities in the framework of the common TNG-NOT offer (see below), thus exploiting the simultaneous use of NOT and TNG.
  • The INAF-TAC can reduce a Long-Term Program to a normal one to be executed in a single semester.

Ennio Poretti

Telescopio Nazionale Galileo
Fundacion Galileo Galilei - INAF