Module functions to retrieve the energy/wavelength grid of an ARF associated with source and background data
Struct_Type get_arf_axes([Integer_Type])
Struct_Type get_arf_baxes([Integer_Type])
Error Return Value: NULL
Arguments:
(1) data set number (default 1)
In Sherpa parlance, a ``dataspace'' is an
N-dimensional
grid defined by the independent variables of the dataset
(i.e., x_i in the expression
y = f(x_0, x_1,...,x_(N-1))).
Simple examples include the CHANNELS array in PHA
datasets and the pixel numbers along each axis of FITS images.
The get_arf_axes() function returns a variable
of Struct_Type, which is equivalent to that returned by
get_axes(). The only difference is that the
fields lo and hi contain data from
the ENERG_LO and ENERG_HI columns
from the input ARF file.
One may display the ARF on the same grid using the
Sherpa plotting command
LPLOT ARF.
- chandra
-
guide
- sherpa
-
get_analysis,
get_axes,
get_coord,
get_data,
get_energy_axes,
get_errors,
get_filter,
get_filter_expr,
get_fit,
get_fluxed_spectrum,
get_ftest,
get_metadata,
get_photon_axes,
get_photon_energy_axes,
get_photon_wave_axes,
get_qvalue,
get_raw_axes,
get_record,
get_source,
get_statistic,
get_stats,
get_syserrors,
get_wave_axes,
get_weights,
record,
save,
write
|
![[CIAO Logo]](../imgs/ciao_logo_navbar.gif){kind=logo}