CAT Override programs

This page lists override programs which may be activated during nights allocated through the CAT (Spanish TAC) on any of the telescopes on the Observatorio del Roque de Los Muchachos and the STELLA Robotic Telescope on Observatorio del Teide. As a general rule, observers can be overriden only by Target of Opportunity (ToO) programs that obtained a higher grade during CAT’s evaluation. Also, observers cannot be overridden by more than one authorized program per night; if multiple override programs are active, their right to override is prioritized (see below). Details about the protocol by which overrides are triggered and executed depends on the telescope. As a good practice, it is recommended that the Principal Investigators (or contact investigator) of ToO proposals contact the observers by phone before the observations are made.

Visitor astronomers affected by ToO observations: if your program has been overridden, please fill the Override report.

There is no payback for the time lost to overrides. However, in the case that 4 hours or more are lost because of overrides in a single run, the CAT will try to compensate for the time lost in allocations in following semesters, or to compensate during CAT service time. This is not automatically managed, and therefore programs who have lost such amount of time because of overrides should explicitely state it in the newly submitted proposals, or contact CAT to see whether the lost time can be accommodated in service time.

Note: In case of conflict with the information provided next and the Web pages of the telescopes, the latter will take precedence.

Override programs approved per semester (since 2014B).

2017B

WHT, INT, see ING override page (CAT programs start with character “C”).

For ToO programs approved at LTStella, and GTC, their queueing and priority are managed by the telescope teams following the ranking provided by the CAT.

ToO programs in Q3 and Q4 on GTC are not approved from 2017B onwards.

2017A

WHT, INT, see ING override page (CAT programs start with character “C”).

TNG: 3-MULTIPLE-3/17A (PI: Pablo Santos Sanz) is permitted up to 4 overrides of 1 hour each with DOLORES. It can override the following CAT proposals only: 5-TNG2/17A, 95-TNG13/17A, and 58-TNG9/17A.

NOT: 109-NOT8/17A (PI: Lucía Suárez Andrés) is permitted up to 3 overrides of 4 hours each with FIES. It can override the following CAT proposals: 2-MULTIPLE-2/17A, 18-MULTIPLE-2/17A, 24-NOT3/17A, 102-NOT/17A, and 72-NOT5/17A.

For ToO programs approved at LTStella, and GTC, their queueing and priority are managed by the telescope teams following the ranking provided by the CAT.

2016B

WHT, INT, see ING override page (CAT programs start with character “C”).

TNG: 111-MULTIPLE-3/16B (PI: Pablo Santos Sanz) is permitted up to 4 overrides of 1 hour each with DOLORES. It can override all CAT proposals with the exception of 128-MULTIPLE-16/15B (Rubiño Martín), 109-MULTIPLE2/16A (Rebolo López), 43-TNG5/16B (Alonso Sobrino), and 58-TNG7/16B (Pallé Bagó).

For ToO programs approved at robotic telescopes such as the LT or Stella, their queueing and priority are managed by the telescope teams following the ranking provided by the CAT.

2016A

WHT, INT, see ING override page.

2015B

WHT, INT, see ING override page (CAT programs start with character “C”).

NOT: regular CAT programs cannot override IACNordic time, but IACNordic observers can be contacted to see whether they wish to help. 91-MULTIPLE-4/15B (Tescaro) is permitted 1 override of up to 4 hour with ALFOSC. It can override all scheduled CAT nights EXCEPT THOSE IN RUNS LASTING ONLY 1 NIGHT, and service CAT nights.

TNG: 151-MULTIPLE-3/15B (Ortiz Moreno) is permitted up to 4 overrides of 0.5 hour each with DOLORES. It can override all scheduled CAT nights. 91-MULTIPLE-4/15B (Tescaro) is permitted a maximum of 1 override of 4 hours with DOLORES. It can override over all scheduled CAT nights, with the exceptions of proposals 128-MULTIPLE-16/15B (Rubiño Martin) and 92-TNG12/15B (Perger), and it has lower priority that the ToO 151-MULTIPLE-3/15B.

For ToO programs approved at robotic telescopes such as the LT or Stella, their queueing and priority are managed by the telescope teams following the ranking provided by the CAT.

2015A

WHT, INT, see ING override page (CAT programs start with character “C”).

NOT: regular CAT programs cannot override IACNordic time, but IACNordic observers can be contacted to see whether they wish to help. 139-MULTIPLE-4/15A (Gorosabel) is permitted 2 overrides of up to 1 hour/each with any of the instruments ALFOSC, MOSCA, NOTCAM and STANCAM, for a total of maximum 8 hours. It can override all scheduled CAT nights and service CAT nights. 39-MULTIPLE-4/15A (Tescaro) is permitted 2 overrides of up to 4 hour/each with ALFOSC. It can override all scheduled CAT nights EXCEPT THOSE IN RUNS LASTING ONLY 1 NIGHT, and service CAT nights, but has lower priority than the ToO program above.

TNG: 36-MULTIPLE-4/15A (Ortiz Moreno) is permitted up to 4 overrides of 0.5 hour/each with DOLORES. It can override all scheduled CAT nights and service CAT nights. 39-MULTIPLE-4/15A (Tescaro) is permitted a maximum of 2 overrides of 2 hours each with DOLORES. It can override over all scheduled CAT nights and service CAT nights, with the exceptions of proposals 140-TNG18/15A (Rebolo) and 96-TNG11/15A (González Hernández), and it has lower priority that the ToO above. 144-MULTIPLE-2/15A (Gorosabel) is permitted a maximum of 1 override with NICS of up to two hours, and 2 overrides with DOLORES of up to 1 hour each. It can override over all scheduled CAT nights and service CAT nights, with the exceptions of proposals 140-TNG18/15A (Rebolo) and 96-TNG11/15A (González Hernández), and it has lower priority that the ToOs above.

Mercator: 36-MULTIPLE-4/15A (Ortiz) is permitted a maximum of 4 overrides of up to 0.5 hours with MAIA. It can override all scheduled CAT nights in which MAIA is used.

For ToO programs approved at robotic telescopes such as the LT or Stella, their queueing and priority are managed by the telescope teams following the ranking provided by the CAT.

2014B

WHT, INT, see ING override page (CAT programs start with character “C”).

NOT: 95-MULTIPLE-3/14B-1 (Tescaro) is allowed 2 overrides of up to 4 hours each with ALFOSC. It can override all scheduled CAT nights and service CAT nights, with the exceptions of proposals 73-MULTIPLE2/13B-1 (Balaguer Núñez) and 84-NOT12/14B (González). 65-MULTIPLE-4/14B (Gorosabel) is permitted 2 overrides of up to 1 hour/each with any of the instruments ALFOSC, MOSCA, NOTCAM y STANCAM. It can override all scheduled CAT nights and service CAT nights, with the exceptions of proposals 73-MULTIPLE2/13B-1 (Balaguer Núñez), 84-NOT12/14B (González), and 109-MULTIPLE-2/14B-1 (Deeg). It has a lower priority than the other ToO above (95-MULTIPLE-3/14B-1, Tescaro).
 
TNG: 153-MULTIPLE-2/14B (Gorosabel) is permitted a maximum of 1 override with NICS of up to two hours, and 2 overrides with DOLORES of up to 1 hour each. It can override all scheduled CAT nights, with the exceptions of proposals 69-TNG5/14B (Ribas) 145-TNG14/13B-1 (Villaver), and 83-TNG8/14A (Rebolo). 95-MULTIPLE-3/14B-1 (Tescaro) is permitted a amximum of 2 overrides of 2 hours heach with DOLORES. It can override over all scheduled CAT nights, with the exceptions of proposals with the exceptions of proposals 69-TNG5/14B (Ribas) 145-TNG14/13B-1 (Villaver), and 83-TNG8/14A (Rebolo). It has a lower priority than the other ToO above.
 
Mercator: 5-MULTIPLE-3/14B-3 (Ortiz) is permitted a maximum of 4 overrides of up to 0.5 hours with MAIA. IIt can override all scheduled CAT nights in which MAIA is used, with the exceptions of proposals 73-MULTIPLE2/13B-2 (Balaguer Núñez).
 
For ToO programs approved at robotic telescopes such as the LT or Stella, their queueing and priority are managed by the telescope teams following the ranking provided by the CAT.