This page is relevant to you if you have been assigned time at the Two-meter Twin Telescope (TTT) in the 2025A Spanish CAT.
Welcome and congratulations on your winning proposal at Spanish CAT.
Read the following instructions to schedule your own observations at the TTT telescope.
Important remarks
- TTT is a robotic telescope. All observations are scheduled via our online interface and carried out automatically by our software. All proposals must be programmed by the astronomer, without Light Bridges’ intervention, and must be compatible with our control interface.
- The awarded time will be consumed as your observations take place. Overhead times (read-out time, pointing time, …) are included into this computation and taken from your balance of Observing Time Rights (Derecho de Tiempo de Observación or “DTO”, in Spanish).
- We work hard to optimize the results and maximize observing time, but “shared risk” means the telescope may occasionally consume time without producing useful images or any images at all.
Instructions
- All the scheduling is done through the portal dto.ttt.lightbridges.es.
- During the 1st week of 2025, we will contact all awarded PIs with their username and password.
If you are the PI of an awarded project, and you have previously observed with us, you don’t need to wait for the confirmation email. You can log in with your credentials as usual.
- As a PI, once you receive your credentials, you must log in to the portal and create your proposal using the same title as the one submitted to the Spanish CAT.
It is the PI’s responsibility to log in into the system and create the same proposal than the one submitted to Spanish CAT. If you haven’t received your credentials or you have forgotten them, please contact us at .
- Once the proposal is submitted, Light Bridges will approve it within 48 hours and allocate the observation time awarded by Spanish CAT.
- After approval, you can add the observing runs, which will be scheduled on the telescope
Scheduling runs and obtaining data
We recommend watching this short video tutorial to familiarize yourself with scheduling new runs and obtaining the data.
Inviting new users to your proposal
Once your proposal is created, you might want to add co-investigators into your proposals for collaboration. To do so, (1) they first need to have an account at dto.ttt.lightbridges.es and (2) you can then invite them to your proposal.
(1) Registering new users
- First, find out your organization token. Visit your profile at dto.ttt.lightbridges.es and look for your organization token, which consists of 6 characters (like
AB1234, see image). - Share this code with any user you would like to add. Please, do not share it publicly.
- Ask the new user to access dto.ttt.lightbridges.es and click on “Register”.
- They should complete the form with the provided organization token.
- New users will then be registered under the same organization/university as yours.
(2) Inviting users to your proposal
- Go to dto.ttt.lightbridges.es and click on your proposal.
- On the left, click on users (1, see image)
- Type the user’s email and they will be added to your proposal (2).
Invited users will have the same privileges as you regarding the proposal: they can schedule new observations and access all images generated during your awarded time.
Questions and contact information
Any questions can be sent to .
Frequent questions will be posted here and held as a FAQ for future editions.
