Welcome to the IAC Time Allocation Commission proposal submission service. Please visit CAT for additional information and news about the proposal submission process and the time allocation of the Commission. Both the principal investigator and all co-investigators must be registered to submit proposals. If you already have an account please log in to view and submit proposals.
If you are facing technical difficulties with the application, you can contact us at helpdesk-cat@iac.es.
2027A Regular CAT call
Regular night time call for 2027A, including GTC, TNG, WHT, NOT, Stella, LT, TCS, TTT, and Mercator
Time types available in this call:CATESP IACFLO CATCHI CATFLO CATMEX
Night time calls
Spanish Service Time - Fast Track
TNG and NOT Fast Track proposals on Spanish Service nights and Spanish Service Time for TCS and IAC80. The PI of the IAC80 proposals must affiliated to the IAC.
Solar time calls
2026B Solar CAT call
2026B Special CAT time
2026B Solar CAT call
2026B Regular Solar CAT time