7
Appendix
7.1
Alpy Modules & Accessories
7.1.1
Alpy Guiding module
As explained in this document, working in slit mode
gives some key improvements to your observations.
But in this mode, you cannot see the telescope field,
and it is difficult to position the star on the slit.
The Alpy guiding module makes it possible to ob-
serve the slit entrance with a second camera (usually
called the guiding camera). This allows you to posi-
tion the star precisely on the slit, and to track it con-
tinuously. This gives comfort, of course, but also im-
proves the quality of data, and allows long exposure
times. If you’re using your Alpy 600 for astronomi-
cal observations, the Alpy guding module is almost
mandatory.
In the image below, you can see the telescope field
and the Alpy 600 slit:
During the night, you can observe and control the
star position vs the slit:
7.1.2
Alpy Calibration module
As described in this document, getting high qual-
ity spectra requires reference images. These images
can be made “manually”, by putting a calibration or
flat lamp in front of the telescope. But this operation
is dramatically simplified by using the Alpy calibra-
tion module. This module includes a halogen lamp
for flat field images and an Argon-Neon lamp for cal-
ibration. It can even be used remotely, to avoid any
operations at the telescope during observations. The
Alpy calibration module is not required to produce
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Summary of Contents for Alpy 600
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