calculate_dn_to_radiance_factor#

irispy.utils.spectrograph.calculate_dn_to_radiance_factor( *, iris_response, wavelength, detector_type, spectral_dispersion_per_pixel, solid_angle, )[source]#

Calculates multiplicative factor that converts counts/s to radiance for given wavelengths.

Parameters:

iris_response (dict) – The IRIS response data loaded from irispy.utils.response.get_latest_response.
wavelength (astropy.units.Quantity) – Wavelengths for which counts/s-to-radiance factor is to be calculated
detector_type (str) – Detector type: ‘FUV’ or ‘NUV’.
spectral_dispersion_per_pixel (scalar astropy.units.Quantity) – Spectral dispersion (wavelength width) of a pixel.
solid_angle (scalar astropy.units.Quantity) – Solid angle corresponding to a pixel.

Returns:

Multiplicative conversion factor from counts/s to radiance units for input wavelengths.

Return type:

astropy.units.Quantity

Notes

The term “multiplicative” refers to the fact that the conversion factor calculated by the calculate_dn_to_radiance_factor function is used to multiply the counts per second (cps) data to obtain the radiance data. In other words, the conversion factor is a scaling factor that is applied to the cps data to convert it to radiance units.