Oversubscription rates

The graphs below are automatically created by the CAT application tool. The oversubscription factors are computed as the ratio between the total requested time and the total time allocated by the CAT on each semester. The latter include the time allocated to Target of Opportunity Programmes (ToOs). Figures are given in nights, where one night correspond to 9 hours (for programmes defined in hours, such as the GTC programmes or the ToOs).

Note that the above definition does not provide a fair estimate of the real oversubscription factor for the GTC, as CAT allocates a significantly larger number of hours than can be effectively executed (by a factor larger than two including ToOs and Filler programmes) in order to populate the GTC observing queue with a sufficient number of programmes to cover different visibility and weather conditions.  A more realistic measure of the GTC oversubscription factor, calculated as the ratio between the  total requested time and the total executed time is provided in this graph. For semesters 15A and 15B, the executed time is temporarily set to 500 hours, and will be adjusted as soon as the real number is provided. The executed time includes the overheads for each science programme, and the time lost for bad weather in both service and visitor mode is not included.

Semester	Per telescope	Per Instrument		Semester	Per telescope	Per instrument
2015A	View	View		2015B	View	View
2014A	View	View		2014B	View	View
2013A	View	View		2013B	View	View
2012A	View	View		2012B	View	View
2011A	View	View		2011B	View	View
2010A	View	View		2010B	View	View
2009A	View	View		2009B	View	View
2008A	View	View		2008B	View	View
2007A	View	View		2007B	View	View
2006A	View	View		2006B	View	View
2005A	View			2005B	View	View
2004A	View			2004B	View
2003A	View			2003B	View
2002	View
2001	View
2000	View
1999	View
1998	View
1997	View