Click here for the image browser version of this page . ... Each image is a ``true color'' composite of three monochromatic images, in which the red, green, and blue intensities each correspond to the intensity of one of the original images. ... In this case, the three basic colors are assigned as follows: . color filter name wavelength width component revealed RED Hydrogen Alpha 6575 14 ionized gas GREEN Oxygen [III] 5013 14 strongly ionized gas BLUE Broadband Blue 4324 1156 dust and starlight . ...

... 2.3 Data acquisition Spectra generated by the Multibeam correlator contain the usual structure seen in spectra from other H i instruments: a bandpass spectrum which is the sum of the sky , ground and receiver temperatures multiplied by the product of the filters in the receiver chain; superimposed on this is a noise ... Note also that sources extended much beyond ,40 arcmin can be imaged poorly in HIPASS images because of the bandpass sidelobe effect described in Section 3.3. ...