| Description: | CAMRAS is a volunteer organisation that is hard at work restoring the Dwingeloo 25m radio telescope back to working order, and making it accessible to amateur astronomers, radio amateurs and for education. To start the new year with some fireworks, and to show off the progress we have made so far, we performed a scan of the Galactic plane on the 2nd of January. The image above shows the 21cm HI emission as a function of frequency and Galactic longitude. Several of the spiral arm features can be clearly discerned. The scan consists of 501 pointings, each separated by half a degree and covering almost all of the Galactic plane as is visible from our location. At each pointing, we did a 30 second measurement with our newly built FFT spectrometer. The frequency resolution of this setup is 15kHz which corresponds to 3.2km/s, the top and bottom of this image correspond to -210km/s and 157km/s. The doppler shift caused by the Earth's motions haven't been subtracted from this data yet. |
