MIDI Filter Database

This page contains information about the MIDI filters that are currently offered to observers. It is possible to download filter transmission as ASCII files. In each file, after the header, the left column gives the wavelength (in micron), and the right column gives the transmission (in percent).These filters have been manufactured and measured by the University of Reading (Infrared Multilayer Laboratory).

 

Name (FITS Keyword value) Nband
Name (Univ. of Reading) 2FJ
MIDI filter number 01
Description Full N-band
Central wavelength (µm) 10.34
FWHM (µm) 5.24
Download ASCII file
Name (FITS Keyword value) SiC
Name (Univ. of Reading) 2FE
MIDI filter number 02
Description Long wavelengths
Central wavelength (µm) 11.79
FWHM (µm) 2.32
Download ASCII file
Name (FITS Keyword value) N8.7
Name (Univ. of Reading) 2FU
MIDI filter number 03
Description Short wavelengths
Central wavelength (µm) 8.64
FWHM (µm) 1.54
Download ASCII file
Name (FITS Keyword value) ArIII
Name (Univ. of Reading) 2FN
MIDI filter number 05
Description [Ar III]
Central wavelength (µm) 9.00
FWHM (µm) 0.13
Download ASCII file
Name (FITS Keyword value) SIV
Name (Univ. of Reading) 2FQ
MIDI filter number 08
Description [S IV]
Central wavelength (µm) 10.46
FWHM (µm) 0.16
Download ASCII file
Name (FITS Keyword value) N11.3
Name (Univ. of Reading) 2FF
MIDI filter number 10
Description PAH 2
Central wavelength (µm) 11.28
FWHM (µm) 0.60
Download ASCII file
Name (FITS Keyword value) NeII
Name (Univ. of Reading) 2FL
MIDI filter number 11
Description [Ne II]
Central wavelength (µm) 12.80
FWHM (µm) 0.21
Download ASCII file