11.1.5 Temperature-Dependent Degradation Correction

IUE flux values are corrected for variations in camera sensitivity as a function of THDA using the temperature-dependent coefficients as derived from the sensitivity monitoring analysis (Garhart 1991). This correction is applied to the net flux along with the absolute calibration and sensitivity degradation corrections according to:

$$R_{T} = {1 \over (1 + C(THDA - ref.~THDA))}$$

and

$$Temperature~Dependent~Corrected~Flux = FN_{\lambda} \times R_{T}$$

where Flux is the net flux, C is the temperature coefficient and ref. THDA is the reference THDA. The reference THDA was calculated by taking an average of the THDAs for the sensitivity monitoring data which were used to derive the temperature coefficients. Table 11.9 contains the correction values, as used in the above equation.

 

 

LWP LWR SWP

Temp. Coef. C -0.0019±0.0003 -0.0088±0.0004 -0.0046±0.0003

$$^\circ$$ 9.5 14.0 9.4