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Subsections

13.19 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.

  
13.19.1 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

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

Same file structure as in section 13.19.1

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

Same file structure as in section 13.19.1

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

Same file structure as in section 13.19.1, but instead of temperature in field 1, the exponent ${\alpha}$ of the power law is given.

next up previous contents
Next: A Instrument Tables Up: 13 Calibration G Products Previous: 13.18 Effective solid angles

ISOPHOT Data Users Manual, Version 4.1, SAI/95-220/Dc