III. 4. A. Constructing the 42-inch catalog



The source code involved is:

We use images obtained with the Lowell Hall 42-inch telescope to calibrate the Mosaic frames. First, we construct a catalog of stars and their calibrated photometry from the 42-inch images. Second, we match these with the catalog of stars with instrumental photometry from the Mosaic images created by Autophot (see Section III.3). Then, we calculate the transformation to the standard system for the Mosaic data. We now construct the 42-inch catalog by doing the following:

For the 0.9m CTIO data, a lot of this isn't needed. I created autophot09m.cl, and finally settled on 5 pixels as the reference aperture, and 10 pixels as the standards radius. I replaced "stetson3" with "stetson5", and "apcor3" with "apcor5". Similarly I simplied photsetup since there was only one night involved, and since the V and U scales were indistinquishable.

By the way: north is UP, east is to the RIGHT, and the plate scale is 0.401"/pixels no matter what it says on the stupid SMARTS web page.