Hodge on/off H-alpha Narrow Band Filters

Not on-site at APO, but can be obtained on loan--contact Paul Hodge at UWash, hodge/astro.washington.edu

NAME  CENTER(nm)  FWHM(nm) TMAX(%) DIMENSIONS(mm)   TRACES       DATA
-------------------------------------------------------------------------
6563    656.2      2.30    76.08                   (1)  (2)    trace data
6585    658.6      2.23    65.18                   (1)  (2)    trace data
6607    660.8      2.42    73.85                   (1)  (2)    trace data
6629    662.8      2.63    77.05                   (1)  (2)    trace data

(1) higher resolution trace centered on peak transmission

(2) lower resolution trace from 300 nm to 1200 nm

What to do with the trace data.

6563, 6585, 6607, 6629 combined trace