Transmission data for the KPNO Mosaic NOAO Deep Wide-Field Survey Bw filter (k1025)


Below are the transmission curves for this filter in parallel light on different dates.

Note that there is a shift in central wavelength when placed in different f/ratio beams. At the KPNO 4meter f/3.1 beam this corresponds to a shift of approximately 12 Angstroms bluer; at the CTIO 4meter f/2.9 this corresponds to a shift of approximately 15 Angstroms bluer; at the WIYN 0.9m f/7.9 this corresponds to a shift of approximately 5 Angstroms bluer. See the plot at the bottom of the page.

Note: This filter was called the NDWFS UB filter in 1997-1998.

Click here to get the ASCII version of the August '03 data from the above plot.
Click here to get the postscript version of the above plot.


Click here to get the ASCII version of the above plot.
Click here to get the Postscript version of the above plot.


Below is a plot of the transmission of this filter when used at telescopes with differing focal ratios and central obscurations; the KPNO 4m (f/3.1) and the CTIO 4m (f/2.9). At the KPNO 4m f/3.1 the properties of this filter are:
CWL=4091A, FWHM=1250A, PEAK TRANSMISSION=91.7%.

Click here for the ASCII version of the simulation data used in the above plot.
Click here for a postscript version of the above plot.



Last updated December 21, 2004 by Heidi Schweiker