Unexpected result on RR Lyrae at R = 45000
Posted: Thu Apr 10, 2014 11:33 pm
Last night (April 9-10), observation tentative on RR Lyrae pulsating star with a Celestron 11 (relatively
modest diameter telescope), and VHIRES spectrograph at power resolution R = 45000.
The plot shows all spectra acquired (VisualSpec for the visu) during increasing light phase.
Times resolution (= exposure time) is of 5 minutes.
This one shot show spectral resolution (thin red lines are front
the Thor/Ar lamps):
Ok, the signal to noise ratio value is only 10, but the shock wave events are clearly visible.
Unexpected because the very high spectral resolution of the setup and V=7.7 mean magnitude of RR Lyrae.
More about VHIRES: http://www.astrosurf.com/buil/vhires/test.htm
Large potential, more than expected.
Christian
modest diameter telescope), and VHIRES spectrograph at power resolution R = 45000.
The plot shows all spectra acquired (VisualSpec for the visu) during increasing light phase.
Times resolution (= exposure time) is of 5 minutes.
This one shot show spectral resolution (thin red lines are front
the Thor/Ar lamps):
Ok, the signal to noise ratio value is only 10, but the shock wave events are clearly visible.
Unexpected because the very high spectral resolution of the setup and V=7.7 mean magnitude of RR Lyrae.
More about VHIRES: http://www.astrosurf.com/buil/vhires/test.htm
Large potential, more than expected.
Christian
