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Subsections


14.22 Colour Corrections 


Description Parameter:	 Appendix C
Processing Level:	 none
Usage in processing:	 N/A
File Type:		 Binary FITS Table
File Names:		 PCCBB, PCCMBBONE, PCCMBBTWO, PCCPOWER

The colour correction tables are not used in OLP. Since the colour corrections depend on source specific assumptions, no efforts were made for implementation in OLP. The Cal-G products give the observer the possibility to apply colour corrections. Colour corrections are provided for 4 different models of the infrared continuum: blackbody $B_{\nu }(T)$, modified blackbodies ${\nu}^{\alpha}{\cdot}B_{\nu}(T)$ with ${\alpha}=$ 1 and 2, and power-law continua ${\nu }^{\alpha }$. A description of the derivation of the colour corrections is given in Appendix C.

The flux density value in OLP which refers to a source spectrum ${\rm F_{\nu}{\propto}{\nu}^{-1}}$ has to be divided by the colour correction factor associated to the assumed source spectrum.


14.22.1 Product PCCBB: black body $B_{\nu }(T)$ colour correction

Binary FITS table with record length 104. The record fields are: 


Field	Offset	Number	Type	Description
TEMP 	0	1 	R*4	Temperature in K
P1_3.29 4	1 	R*4	P1 3.3 $\mu $m correction
P1_3.60 8	1 	R*4	P1 3.6 $\mu $m correction
P1_4.85 12	1 	R*4	P1 4.8 $\mu $m correction
P1_7.30 16	1 	R*4	P1 7.3 $\mu $m correction
P1_7.70 20	1 	R*4	P1 7.7 $\mu $m correction
P1_10.0 24	1 	R*4	P1 10 $\mu $m correction
P1_11.3 28	1 	R*4	P1 11.3 $\mu $m correction
P1_11.5 32	1 	R*4	P1 12 $\mu $m correction
P1_12.8 36	1 	R*4	P1 12.8 $\mu $m correction
P1_16.0 40	1 	R*4	P1 15 $\mu $m correction
P2_20 	44	1 	R*4	P2 20 $\mu $m correction
P2_25 	48	1 	R*4	P2 25 $\mu $m correction
P3_60 	52	1 	R*4	P3 60 $\mu $m correction
P3_100 	56	1 	R*4	P3 100 $\mu $m correction
C1_50 	60	1 	R*4	C100 70 $\mu $m correction
C1_60 	64	1 	R*4	C100 60 $\mu $m correction
C1_70 	68	1 	R*4	C100 80 $\mu $m correction
C1_90 	72	1 	R*4	C100 90 $\mu $m correction
C1_100 	76	1 	R*4	C100 100 $\mu $m correction
C1_105 	80	1 	R*4	C100 105 $\mu $m correction
C2_120 	84	1 	R*4	C200 120 $\mu $m correction
C2_135 	86	1 	R*4	C200 150 $\mu $m correction
C2_160 	92	1 	R*4	C200 170 $\mu $m correction
C2_180 	96	1 	R*4	C200 180 $\mu $m correction
C2_200 	100	1 	R*4	C200 200 $\mu $m correction


14.22.2 Product PCCMBBONE: modified black body ${\nu }^{1}{\cdot }B_{\nu }(T)$ colour
correction

Same file structure as in Section 14.22.1


14.22.3 Product PCCMBBTWO: modified black body ${\nu }^{2}{\cdot }B_{\nu }(T)$ colour
correction

Same file structure as in Section 14.22.1


14.22.4 Product PCCPOWER: Power-law ${\nu }^{\alpha }$ colour correction

Same file structure as in Section 14.22.1, but instead of temperature in field 1, the exponent $\alpha$ of the power-law is given.

next up previous contents index
Next: 14.23 Footprint Matrices for Up: 14. Calibration-G Products Previous: 14.21 Effective Solid Angles
ISO Handbook Volume IV (PHT), Version 2.0.1, SAI/1999-069/Dc