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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
Shelyak Photometric Slit 23/200µm for Alpy 600 & UVEX

Shelyak Photometric Slit 23/200µm for Alpy 600 & UVEX

by Shelyak
SKU SHK-SE0145
$221.00 - $221.00
$221.00
$221.00 - $221.00
$221.00
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  • Dual slit design with 23µm and 200µm widths
  • Enables high-resolution spectroscopy and spectrophotometry
  • Designed for Shelyak Alpy 600 and UVEX spectroscopes
  • Requires the Alpy Guiding Module for operation
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  • Description
  • FAQ
  • Specifications
  • Warranty

  • Photometric Slit 23/200µm for Alpy 600 & UVEX

    This Photometric Slit for Alpy 600 and UVEX spectroscopes enables true spectrophotometry by integrating two distinct apertures in a single component: a narrow 23µm slit for maximum resolution and a wide 200µm slit for capturing total stellar flux.

    The 23µm / 200µm Slit: A Dual-Purpose Tool for Spectrophotometry

    This accessory allows you to switch between two fundamental modes of spectroscopic observation without changing hardware. The 23µm slit provides the narrowest aperture, maximizing the spectral resolution of your Alpy 600 or UVEX to resolve fine details in stellar spectra. When your goal is to measure the precise brightness of an object across different wavelengths—true spectrophotometry—the wider 200µm slit ensures that all the light from the star enters the spectroscope, even in moments of poor seeing, for an accurate flux measurement.

  • What is the purpose of the dual slits on the 23/200µm Photometric Slit?

    The two slits serve two different scientific goals. The narrow 23µm slit is used to achieve the highest possible spectral resolution for detecting fine absorption or emission lines. The wide 200µm slit is used for spectrophotometry, where the goal is to capture all of a star's light to accurately measure its brightness, sacrificing some resolution for photometric precision.

    When should I use the 23µm slit with my Alpy 600?

    Use the 23µm slit when your primary objective is resolving detail in a spectrum. This is ideal for classifying star types, identifying chemical compositions, or measuring the doppler shift of spectral lines in objects like binary stars or quasars.

    When is the 200µm slit the right choice for the Photometric Slit?

    The 200µm slit is essential for spectrophotometry. If you are studying variable stars, supernovae, or any object where you need to create an accurate spectral energy distribution curve, the wide slit ensures you are measuring the total energy output of the star without light loss at the aperture.

    Is this Photometric Slit compatible with all Shelyak spectrographs?

    No, this slit is specifically designed for use with the Shelyak Alpy 600 and Shelyak UVEX spectroscope models. It is not compatible with other instruments like the Lhires III or LISA.

    Do I need other accessories to use the 23/200µm Photometric Slit?

    Yes, this photometric slit must be used with the Alpy Guiding Module. The guiding module is required to position the target star accurately on the desired slit and maintain that position during an exposure.

    How does the 200µm slit on the Photometric Slit help with poor seeing?

    Atmospheric turbulence (seeing) causes a star's image to move and swell. A narrow slit can block some of this light as the star image shifts, leading to an inaccurate brightness measurement. The wide 200µm slit provides a large enough opening to contain the entire star image even under poor seeing conditions, ensuring all its light enters the spectroscope for a valid photometric reading.

  • Slit Widths 23µm (High Resolution) / 200µm (Photometry)
    Primary Function Spectrophotometry & High-Resolution Spectroscopy
    Compatibility Shelyak Alpy 600, Shelyak UVEX
    Required Accessory Alpy Guiding Module
  • Shelyak 1-Year Warranty