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Quasar Spectra 3C273
Dear all
3C273 is the brightest quasar and it is currently reasonably high in the north in the evening in Virgo. It ha a mag of 12.9 so is easily found for reasonable size scopes visually.
I took a spectra of it to demonstrate it's redshift.
The spectra is a stack of 5 x 300sec exposures through a C11 with my LISA spectrograph.
The attached graph is an overlay of the spectra of a standard A2V star that has nice hydrogen absorption lines for comparison.
The quasar demonstrates hydrogen emission lines and Ha, Hb, and Hg are easily identified. They are all redshifted and when I measure the shift it gives a calculated redshift that is pretty close to the professionally measured redshift.
Cheers
Terry
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