create_rmf
- sherpa.astro.ui.create_rmf(rmflo, rmfhi, startchan=1, e_min=None, e_max=None, ethresh=None, fname=None, name='delta-rmf') DataRMF [edit on github]
Create an RMF.
If fname is set to
None
then this creates a “perfect” RMF, which has a delta-function response (so each channel uniquely maps to a single energy bin), otherwise the RMF is taken from the image data stored in the file pointed to byfname
.Changed in version 4.17.0: Support for startchan values other than 1 has been improved.
Changed in version 4.16.0: The e_min and e_max values will use the rmflo and rmfhi values if not set.
Added in version 4.10.1.
- Parameters:
rmflo (array) – The energy bins (low and high, in keV) for the RMF. It is assumed that emfhi_i > rmflo_i, rmflo_j > 0, that the energy bins are either ascending, so rmflo_i+1 > rmflo_i or descending (rmflo_i+1 < rmflo_i), and that there are no overlaps. These correspond to the Elow and Ehigh columns (represented by the ENERG_LO and ENERG_HI columns of the MATRIX block) of the OGIP standard.
rmfhi (array) – The energy bins (low and high, in keV) for the RMF. It is assumed that emfhi_i > rmflo_i, rmflo_j > 0, that the energy bins are either ascending, so rmflo_i+1 > rmflo_i or descending (rmflo_i+1 < rmflo_i), and that there are no overlaps. These correspond to the Elow and Ehigh columns (represented by the ENERG_LO and ENERG_HI columns of the MATRIX block) of the OGIP standard.
startchan (int, optional) – The starting channel number: it should match the offset value for the DataRMF class.
e_min (None or array, optional) – The E_MIN and E_MAX columns of the EBOUNDS block of the RMF. If not set they are taken from rmflo and rmfhi respectively.
e_max (None or array, optional) – The E_MIN and E_MAX columns of the EBOUNDS block of the RMF. If not set they are taken from rmflo and rmfhi respectively.
ethresh (number or None, optional) – Passed through to the DataRMF call. It controls whether zero-energy bins are replaced.
fname (None or str, optional) – If None then a “perfect” RMF is generated, otherwise it gives the name of the two-dimensional image file which stores the response information (the format of this file matches that created by the CIAO tool rmfimg).
name (str, optional) – The name of the RMF data set
- Returns:
rmf
- Return type:
DataRMF instance
See also