Having removed the burden of standard data reduction; de-biasing, flat-fielding, de-fringing
etc., the off-line
PL is principally concerned with performing accurate photometry of stellar
like objects. This reflects the nature of the majority of science to be performed on the
LT.
The PL has evolved to its present state through three different versions, each of which is
detailed below; a short summary of each version is also given such that an overview of the
PLs evolution can be be seen.
- Version 1 of the PL performs each necessary process in a non-complex way, but
fundamentally sets up the PL infrastructure to be followed in future versions of
the code. All code in Version 1 was custom written for the PL.
- Version 2 starts to incorporate tried and tested open-source software, with the
custom written software managing the infrastructure. The aperture photometry
routines of version 1 are updated with optimal photometry codes.
- Version 3 improves (i) the WCS software used in previous versions and (ii) the
airmass curve creation by matching the observed zeropoint with the theoretical
zeropoint, thus giving a photometric check to the data.
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