ENERGIES extensionThere will be a BINTABLE extension called ENERGIES containing the energy bins. The columns ENERG_LO and ENERG_HI comprise the lower and upper energy of each spectral bin. Note that the bins must be contiguous (ie energ_hi(i) = energ_lo(i+1)). This extension should also include the standard OGIP keywords :
HDUCLASS 'OGIP'
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