of spectral types based on the SDSS imaging and PHOTO processing. An additional set of likely M 13 members, including several stars that were saturated in the SDSS image ($r < 14.5$) and with coordinates from Cudworth $\&$ Monet (1979) and Cudworth (private communication), were added to the target list with high priority (bumping ordinary SEGUE targets), in order to obtain spectra of several likely giant-branch and horizontal-branch members.

In the case of NGC 2420, the stars chosen for spectroscopy were primarily targeted from the SDSS photometry obtained by the PHOTO pipeline, using the normal SEGUE target selection algorithm. Additional stars with apparent magnitudes in the range 14.5 $< g <$ 20.5 that fell within 0.5 degrees from the center of NGC 2420 were also targeted for spectroscopy. However, due to crowding, if two objects were within 55${''}$ of one another, then only one received a fiber. Thus, not every star in the central region of NGC 2420 was targeted. There were about 480 objects selected in this way, including a number of non-cluster members that are located in the NGC 2420 field.

For M 67, the initial targets came from the SDSS imaging data processed by the PHOTO pipeline. 