The Danish 1.54-m Telescope Reserved IQ Filters
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DFOSC and FASU: Reserved IQ Filters

Filter	ESO #	Size (mm)	(nm)	(nm)
Bessel U	632	C60.0	355.60	53.37
Bessel B	450	C60.0	433.57	102.29
Bessel V	451	C60.0	544.80	116.31
Bessel R	452	C60.0	648.87	164.7
Gunn g	780	C60.0	514.46	81.13
Gunn r	784	C60.0	669.47	103.21
Gunn i	425	C60.0	797.79	142.88
Gunn z	462	C60.0	903.35	lwp
Halpha	693	C60.0	656.23	6.21
Halpha	799	C95.0	656.15	7.25
Halpha r	697	C60.0	665.44	6.16
Hbeta	748	C60.0	486.26	7.55
Hbeta C	749	C60.0	477.38	7.34
OIII	690	C60.0	500.99	5.66
SII	701	C60.0	672.72	6.31
CN	835	C80.0	385.97	5.01
C3	836	C80.0	405.23	7.54
Bcont	837	C80.0	442.16	3.67
C2	838	C80.0	511.07	12.28
NH2	839	C80.0	662.54	3.45
Rcont	840	C80.0	683.82	8.09

• The reserved image quality filters are all circular and have a diameter of 60mm.
• Narrow band filters should be put in the FASU (see manual for explanation).
• 60mm filters will vignet the DFOSC field when used in FASU.

You can see which filters are available at La Silla, and also see their transmission curves by using MIDAS to create the filter GUI (in MIDAS issue the command "create/gui filters"). if you wish to use an ESO filter which is not in the standard set, you should consult with the 2p2 team well before your observing run.

Send comments to <ls-220@eso.org> Last modified: July 18, 2002