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Spare Lamp for Flats
This is a spare halogen incandescent bulb (BA9s socket, 12V, 6W, 500mA) for flat images. Shelyak's Alpy calibration module uses a halogen flat lamp drawing 500mA. Keeping a spare on hand lets you replace a failed bulb without ending an observing session.
Halogen Bulb: BA9s Socket, 12V, 6W
A reliable light source is the foundation of accurate data calibration. As an incandescent halogen bulb, it produces a smooth continuous spectrum without emission lines, which is what a spectroscopic flat needs.
Lamps are consumable components with a finite lifespan. Having this spare means that when the lamp eventually fails, you can replace it quickly and continue your observing run.
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What is this spare lamp for flats used for?
This is a spare halogen incandescent bulb (BA9s socket, 12V, 6W) for taking flat images. Its purpose is to provide a stable, continuous light source for taking flat frames of your spectra.
Why do I need a spare lamp for my calibration unit?
Like any incandescent bulb, the flat lamp in your calibration module has a limited operational life and will eventually burn out. Keeping a spare lamp on hand lets you replace it in the field and continue your work.
Why is a tungsten lamp used for creating flat frames?
Tungsten filaments produce a continuous, broadband spectrum of light. For spectroscopic flats this gives a smooth spectrum without the emission lines of discharge lamps such as fluorescent tubes.
Is this spare lamp compatible with my calibration module?
It is a halogen incandescent bulb with a BA9s socket, rated 12V, 6W (500mA). As compatibility varies, you should consult the manual for your calibration device to confirm that this is the correct replacement lamp before purchasing.
