Background

Ricardo Schiavon made a series of DEIMOS spectroscopic throughput measurements which are still useful as a reference for DEIMOS throughput. His measurements include all DEIMOS gratings at several different central wavelength values. Follow the links below to access plots and tables with the results of observations of the star BD+28 4211, taken under photometric conditions during the months of June-September 2002. The table also shows more recent throughput data are from October 2017.

The throughput is defined as: 

	throughput = Nd/Nt
where:

Data

Throughput data for various central wavelengths and order-blocking filters are available for the following DEIMOS gratings:

Grating 600ZD

Central Wavelength
[Å]		 Plot
(click to enlarge)		 Download Filter Table
5500 PostScript
GIF 		BAL12 Table
GG400 Table
GG455 Table
GG495 Table
6500 PostScript
GIF 		BAL12 Table
GG400 Table
GG455 Table
GG495 Table
7500 PostScript
GIF 		GG495 Table
OG550 Table
All PostScript
GIF 		-- --

Grating 830G

Central Wavelength
[Å]		 Plot
(click to enlarge)		 Download Filter Table
All PostScript
GIF 		-- --

Grating 900ZD

Central Wavelength
[Å]		 Plot
(click to enlarge)		 Download Filter Table
5000 PostScript
GIF 		BAL12 Table
GG400 Table
GG455 Table
GG495 Table
6000 PostScript
GIF 		BAL12 Table
GG400 Table
GG455 Table
GG495 Table
7000 PostScript
GIF 		GG455 Table
GG495 Table
OG550 Table
8000 PostScript
GIF 		GG495 Table
OG550 Table
All PostScript
GIF 		-- --

Grating 1200G

Central Wavelength
[Å]		 Plot
(click to enlarge)		 Download Filter Table
5000 PNG
 GG400 Table
OG455 --
OG550 --
6000 PostScript
GIF 		GG455 Table
OG550 Table
7000 PNG GG455 Table
OG550 --
8000 PNG OG550 Table
All PNG
 -- --

Grating 1200B

Central Wavelength
[Å]		 Plot
(click to enlarge)		 Download Filter Table
5000 PNG GG400 Table
GG455 --
OG550 --
7000 PNG
 GG455 Table
OG550 --
8000 PNG
 OG550 Table
All PNG
 -- --