RR
Lyrae
25
/ 07 / 2012 maximum
Animation of 33 spectra
taken from 24 July 2012 20:35 UT and 25 July 2012 2:17 UT.
Celestron
11 telescope - Lhires3 spectrograph equipped with a 600 g/mm grating
and 23 microns slit - Atik314L+ CCD camera.
The spectrograph
is tuned on Ca II ultraviolet doublet. Elementary exposure time:
600 s. Castanet-Tolosan observatory. ISIS software processing.
Aspect
of ultraviolet RR Lyrae spectrum near minimum light intensity.
Aspect
of ultraviolet RR Lyrae spectrum near maximum light intensity.
2D
dynamic image of 25 / 07 / 2012 maximum.
Note the H delta fast
and quick decrease intensity, probably during the shock wave event
in the star atmosphere.