Aristarchos Transient Spectrometer (ATS)

A low/medium dispersion spectrometer has been designed and manufactured specifically to obtain spectra of relatively bright (brighter than 18-19 mag) but transient phenomena. It can be left running permanently for opportunist over-ride observations of transient events. Survey programs of relatively bright but transient phenomena can also be carried out. (i.e. Gamma-ray bursts as soon after the events as possible, the variable spectra of Symbiotic stars, Cataclysmic variables, Nuclei of nearby Seyfert galaxies, nearby nova events etc.) The spectrometer can obtain sufficient quality spectra (signal-to-noise 10σ) down to B=19th for point sources. ATS was constructed by the University of Manchester and is sponsored by the Universities of Manchester and Patras.

Gratings Option 1 (Red) Option 2 (Blue) Option 3 (All)
grooves/mm: 1200 1200 600
arcsec 10 10 10
spectral range: 5736.9-7071.8 Å 4309.8-5768.8 Å 4009.0-7257.0 Å
Resolution: 1.3 Å 1.4 Å 3.2Å
Dispersion: 103 Å/mm 95 Å/mm 245 Å/mm
Centered wavelength: 6441.6 Å 5074.1 Å 5691.5 Å
Calibrated arc of CuAr lamp: graph graph graph
  • Satus: Currently unavailable

  • Detector: Alta U47 1kx1k

  • Wavelength range (Å): 4009-7257

  • Resolving power: 1,700-5,000

  • Slit Length: Fiber: 10″ on sky

The detector is a thermo-cooled Apogee U47-MB, E2V-CCD4710 AIMO back illuminated, Grade 1 CCD with 1024×1024 13 sq. micron pixels.
The Quantum Efficiency (QE) of the ccd camera is available here.
The spectrometer’s long slit input is fed by 50 fibres (each 50 micron diameter) in a 10 arcsec diameter, bundle in the telescope’s focal plane.

ATS Manual
ATS Cookbook

Optical layout of ATS designed by Prof. J. Meaburn

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