Calibration Access and Data Handbook

Generation from Ground Calibration Data

A spatial and spectral information of the diffuse galactic light emission is taken from literature:

• Lillie and Witt (1976).
• Gondhalekar and Wilson, A&A,1975,38,329
• Mattila, A&A,1980,39,53
• Bahcall & Soneira ApJS, 1984, 55, 67
• Leinert et al. (A&AS, 1998, 127, 1)

The spatial distribution of the DGL is contained in the DGL_MAP extension. The galactic coordinate system is used.
The spectrum is compiled from literature and written into the extension DGL_SPEC. The intensity of the spectrum is scaled to the reference intensity. The photon rate are estimated by folding the DGL spectrum with OSIM. The binary table DGL_CTS lists the expected photon rates for the different filters at the reference intensity.