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| External Related Sites |
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| MegaPrime/MegaCam history in view of data quality | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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This page aims at synthesizing in a single location all the instrumental evolutions of the MegaPrime/MegaCam setup that had an impact on the data since February 2003 (beginning of semester 03A). A lot of improvements were made during the commissioning phase between December 2003 and April 2003. However, some light leaks were contaminating the data during that period in the i' and z' bands and also not one exposure was guided. Guiding became operational in May, however, at that time half the mosaic could not be read out for the whole duration of the observing run. MegaCam was in its full operational mode for the first time in June 2003. Data users wanting to avoid headaches due to a large variety of data of various nature should in consequence focus only on data taken after the 21st of June 2003 (03AQ05 and on). On the other side, data up to the end of the February run should be considered marginal. Major incidents, or collection of incidents (like in 04BQ01) are reported on the CFHTLS news pages as they relate to data quality affecting the survey data in particular, but the notes apply to all data. All times in these tables are in Hawaiian local time. A start date defines the beginning of a night and an end date defines the end of night (the problem usually getting fixed during the day), e.g. "05 Sep. 04 - 07 Sep. 04" means from the evening of the 5th of Sep. to the morning of the 7th.
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