Star Analyser 100.

 

Giove ordine -1_11

Main orders of Jupiter and (very weak) its moons in continuous spectrum. RsSpec reveal some absorption lines, too. For appropriate calibration, the first blazed order, should lie on the right side on the field depicted. In order to allow this, the grating presents a reference mark.

star analyser100

Star Analyser 100: 100 lines/mm diffraction grating spectrograph of blazed type

The  above image, some twenty second exposure longs, shows the spectrum of Jupiter. It was taken with Shelyak Star Analyserat spectrograph, at the prime focus of a Takahashi Tsa 102/816 refractor telescope. The camera used was the  un-modded Eos 40D DSLR .  The Star Anayser 100 is a simple blazed diffraction grating spectrograph . Precisely it is a common 31,8 mm filter to screw in fron of the camera; easy but powerful enough to show clearly the first (blazed ) and the second order spectrum. One should use the Star Analyser to study stellar populations, but, with appropriate tolerance , can be used for qualitative work of some complexity, such as: red shift, spectra meteor, quasar, nebuose and other exotic objects. Of course, much of the detail recorded, depends on the gathering of light, and then from ‘aperture of the scope used. Actually only the first order is profitably used during calibration and analysis. To do this one may use RSpec, by Tom Field (very nice person, indeed) or the powerful but still unstable Vspec. Another great piece of software is Isis (Integrated Spectrographic Innovative Software) : so don’t get me wrong, it has nothing to do with islamic fundamentalism….

Andrea.B@Webmaster

About Andrea.B@Webmaster

Di formazione giuridica, da circa 15 anni mi interesso di astronomia ,di aeroplani, di scienza in genere e divulgazione.
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