Filters
A common system of filters is available for use with the CCD cameras at Moore and Mt. Kent Observatory. With some exceptions, noted below, all filters are mounted in wheels that may be changed on request.
Sloan Photometry
There is a set of Sloan filters for each of the RC24, CDK20N, CDK20S, and CDK700 telescopes. Each set is in a wheel with 6 openings assigned serially.
- (1) g' (400-530)
- (2) r' (530-700)
- (3) i' (700-825)
- (4) z' (825-1100)
- (5) blue block (500-1100)
- (6) Open
Transformation from Sloan to UBVRI Filter Bands
Transformation coefficients are discussed on the Sloan Digital Sky Survey Sloan Digital Sky Survey website
UBVRI Photometry
There is one UBVRI filter wheel at each observatory to be used as needed an any telescope with an IFW3 filter wheel.
- (1) U (340-390)
- (2) B (375-490)
- (3) V (490-580)
- (4) R (570-690)
- (5) I (725-1025)
- (6) Open
BGRC Color Imaging
There is one color imaging wheel at each site.
- (1) C (350-1100)
- (2) R (590-700)
- (3) G (490-575)
- (4) B (390-510)
- (5) Open
- (6) Open
Narrowband
There are four narrowband filter sets available. The standard wheel at Mt. Kent for CDK20S and CDK700 is
- (1) [SII]
- (2) H alpha (656)
- (3) Red continuum
- (4) [O III]
- (5) UV blocked clear
- (6) Open
A wheel for the CDK20N is
- (1) He I (1083)
- (2) [SII]
- (3) H alpha (656)
- (4) Red continuum
- (5) [O III]
- (6) UV blocked clear
A wheel for use at the RC24 is
- (1) [SII]
- (2) H alpha
- (3) Red continuum
- (4) Na D (590)
- (5) [OIII]
- (6) UV blocked clear
SBIG STL Filters
The SBIG STL6303 cameras take 50 mm diameter filters in a 5-filter wheel. Moore and Mt. Kent observatories have the standard UBVIC set installed in the STL cameras:
- (1) U (330-390)
- (2) B (375-490)
- (3) V (490-580)
- (4) R (570-690)
- (5) I (725-1025)
Additionally, at Mt. Kent there is a set of color imaging BGRC filters in a spare wheel. STL cameras require disassembly to change wheels.
The STL camera at Mt. Kent has been retired from Shared Skies and may be used on the APTA telescope there. The STL camera at Moore Observatory is in use on the FSQ roll roof telescope.