ISPI Filters

ISPI is offered with the broad band Y, J, H, Ks filters, as well as a set of narrow band filters. Basic data are given in the tables below. Filter scans are available for some of the filters here [1].

ISPI Broad Band Filters
Filter	Central wavelength (micron)	Wavelengths @80% (micron)
J	1.25	1.176	1.322
H	1.635	1.5005	1.7705
Ks	2.150	1.9915	2.2955
Y	1.0381	BW 0.1457mu

Fluxes, isophotal wavelengths, and isophotal frequencies for Vega have been determined by Tokunaga and Vacca [2] for J, H, and K' filters which comprise part of the MKO/Gemini filter set. Copies of these filters were used in ISPI up until 2004B.

ISPI Narrow Band Filters
Filter	Central wavelength (micron)	Wavelengths @80% (micron)
Cont-203	2.0336	2.0262	2.0400
He I	2.0618	2.0545	2.0674
C IV	2.0826	2.0753	2.0892
H2	2.1262	2.125	2.146
Continuum, 2.14 mu	2.1462	2.1385	2.1532
Br gamma	2.1648	2.1592	2.1738
He II	2.1911	2.1845	2.1976
H2 & continuum 2.25 mu	2.2527	2.2428	2.2618

February 12, 2007