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 are 4 sets of Sloan filters for use at the RC24, CDK20N, CDK20S, and CDK700 telescopes. Each set is in a wheel with 6 openings assigned serially With 4 separate sets it is possible for all telescopes to be used for photometry at any time.
- (1) g' (400-530)
- (2) r' (530-700)
- (3) i' (700-825)
- (4) z' (825-1100)
- (5) Open
- (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
We do not currently support UBVRI filters. For comparison to standards and occasional special projects one wheel at each site could be configured
- (1) B (375-490)
- (2) V (490-580)
- (3) R (570-690)
- (4) I (725-1025)
- (5) C (375-1025)
- (6) Open
As of November 2011, a proposal to add this BVRIC set is under discussion.
BGRC Color Imaging
There is one color imaging set of filters at Moore Observatory. A second set for Mt. Kent may be added.
- (1) B (390-510)
- (2) G (490-575)
- (3) R (590-700)
- (4) C (350-1100)
- (5) Open
- (6) Open
Narrowband
There are four narrowband imaging sets available. The standard wheel at Mt. Kent is
- (1) [SII]
- (2) H alpha (656)
- (3) Red continuum
- (4) Open
- (5) [O III]
- (6) Open
A wheel primarily use at the CDK20N is
- (1) [SII]
- (2) H alpha
- (3) Red continuum
- (4) He I (1083)
- (5) [O III]
- (6) Open
A wheel for use at the RC24 is
- (1) [SII]
- (2) H alpha
- (3) Rec continuum
- (4) Na D (590)
- (5) [OIII]
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.