Filter characteristics

# Filter Slide / Pos	Name		Filter		Size / Thickness [mm]	Type	λC / FWHM [nm](*)	Curve	Comments
#1 /p1	J1		Johnson U		50x50/4	shortpass	365/60	--	UG1/1mm + BG40/3mm; short λcut-off defined by CCD
#1 /p2	J2		Johnson B		50x50/4	bandpass	430/80	--	GG395/1mm + BG25/1mm + BG39/2mm
#1 /p3	J3		Johnson V		50x50/4	bandpass	541.6/67.6	Plot (#)	GG495/2mm + BG39/2mm, Roeser V
#1 /p4	J4		Johnson R		50x50/4	bandpass	648.3/139.8	Plot (#)	OG570/2mm + KG3/2mm, Cousins R
#1 /p5	J5		Johnson I		50x50/3	longpass	846.1/241.7	Plot (#)	RG9/3mm; long λcut-off defined by CCD
--
#2 /p1	E6		H α (wide)		50x50/	interference	657.7/6.7	Plot(#)
#2 /p2	E9		SII continuum		50x50/	interference	702.7/41.1	Plot (#)
#2 /p3	E8		SII		50x50/	interference	672.6/6.8	Plot (#)
#2 /p4	E3		OIII		50x50/	interference	501 / 14	--
#2 /p5	E1		OII		50x50/	interference	372 / 8	--
--
#3 /p1
#3 /p2
#3 /p3
#3 /p4
#3 /p5
--
#4 /p1	Grating1		G300		50x50/	Transmission grating	-		300 grooves/mm, blazed for 600 nm
#4 /p2
#4 /p3
#4 /p4
#4 /p5
--
#5 /p1
#5 /p2
#5 /p3
#5 /p4
#5 /p5
--
#6 /p1	DS1		Deep Sky 1		50x50/	interference	Several lines, see plot	Plot(#)
#6 /p2
#6 /p3
--
--	E2		H β		50x50/	interference	486.7 / 9.7	--
--			Roeser BV		50x50/	bandpass	497.7/155.9	--	BG39/xmm ; long λcut-off defined by CCD
--	E4		OIII		50x50/	interference	500 / 10	--
--	E5		H α (wide)		50x50/	interference	656.7/8.4	Plot(#)
--	E7		H α redshifted		50x50/	interference	672.7/3.8	Plot(#)	Very low transmission
--	E10		CI 8727		50x50/	interference	871.6/5.1	Plot(#)
--	E11		CI continuum		50x50/	interference	916.2/23.7	Plot(#)
--	G1		Gunn z		50x50/	longpass	835.3	Plot	RG830/3mm ; long λcut-off defined by CCD
--	G2		Gunn z		50x50/	longpass	840.8	Plot	RG830/3mm ; long λcut-off defined by CCD
--	DS2		Deep Sky 2		50x50/	interference	Several lines, see plot	Plot(#)
--	DS3		Deep Sky 3		50x50/	interference	Several lines, see plot	Plot(#)

(*) Given as Central Wavelength/ Full Width Half Maximum or cut-on wavelength only for longpass filters or cutoff for shortpass filters.

Long wavelength cut-off defined by CCD properties (~1050nm).

(#) Derived from actual measurements where transmission curve is linked, otherwise design values are given.

Transmission curves made in 10.2018 by Maximilian Häberle, Master student at MPIA.