The PISCO filter system

a) Standard PISCO filters

Figure 1: Relative transmission efficiency of the PISCO filters when using the ICCD detector of Nice University.

In Table 1, we report the characteristics of the filters mounted on the PISCO wheels. The ORIEL filters were purchased from Oriel in France, who distributed the US Andover products worldwide. The J filter is our last acquisition of a filter and was directly bougth to Andover (who made us a nice price discount). Hence, as a result, all the PISCO filters have been actually manufactored by the Andover Corporation.

Name	Reference	Central wavel. (nm)	FWHM (nm)
B	ORIEL/57541	447	47
OIII	ORIEL/54341	501	11
V	ORIEL/57581	530	57
R	ORIEL/57621	644	70
RL	ORIEL/57661	743	69
I	ORIEL/57701	855	74
J	ANDOVER/37227	1240	180

Table1 : Characteristics of the standard PISCO filters.

b) Standard photometric sytems in astronomy

       
Figure 2: Filters corresponding to Johnson/Bessel (left) and Kron-Cousin (right) UBVRI photometric systems can be found for example by Andover Corporation, as standard bandpass optical filters (note: the XX denotes the size).

Examples of the Johnson/Bessel (left) and Kron-Cousin (right) UBVRI photometric are shown in Fig. 2. In the designation Andover P/N KRON-B-XX, the XX denotes the size. For example, a 50mm square would be KRON-B-50S (See Andover products for details)

Bibliographie:

Bessel, M.S., 2005, Standard photometric systems, Annual Review of Astronomy and Astrophysics, 43, 293-336.

Johnson, H.L., and Morgan, W.W., 1953, Fundamental stellar photometry for standards of spectral type on the revised system of the Yerkes spectral atlas, Astrophysical Journal, 117, 313-352.

Thuan, T.X., Gunn, J.E., 1976, A new four-color intermediate-band photometric system, Publications of the Astronomical Society of the Pacific, 88, 543.