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APM Professional Telescopes

APM Professional Telescopes

1m F/8 Ritchey Chrétien with dual Nasmyth Foci, Cape Town (South Africa)

Another large telescope for the South African Astronomical Observatory (SAAO). An 1m F/8 Alt-Az mounted Ritchey Chrétien for robotic use. It has dual Nasmyth Foci. The main telescopes used for research are located at the SAAO observing station (32°22.795’S 20°48,657’E) near Sutherland in the Northern Cape, a 4-hour drive from Cape Town.

Astronomy is our job

Observatory Telescopes

Big prime focus telescopes for private or public observatories including installation and full service.

Robotic / Remote

Robotic instruments for automatic imaging or telescopes for remote observation.

ZWO ASI120MM Guider

asi120mm mini camera autoguider 1000

The new ZWO ASI120MM Mini (mono) with its 3.75 µm pixels is a highly sensitive  autoguider for in a 1.25" body

More 

Product enquiries

Inquiry now

Please make your enquiries about the products you require here. We will contact you as soon as possible with a customised quote.

ZWO Cameras

asi533

Suitable for the spectrograph
ZWO MONO Astro Camera ASI 533MM-PRO cooled, Sensor D= 16 mm, 3.76 µm Pixel Size
Cooled USB 3.0 monochrome astro camera with powerful back-illuminated CMOS sensor for astrophotography in square format

 Cameras for Spectroscope UVEX & LISA (VIS)

LISA Spectroscope (VIS)

lisaThe LISA is the most sensitive instrument in our product range. Thanks to its internal reducer and low resolution, it is the undisputed master of faint objects such as novae & supernovae, planetary nebulae, comets, symbiotic stars, cataclysmic variables, galaxies…

A high-luminosity instrument

The LISA spectroscope is dedicated to the spectroscopy of faint objects such as comets, novae, supernovae, faint variable stars, the redshift of distant galaxies or quasars, or the confirmation of planetary nebulae. Its optical design has been specially studied for the observation of this type of object, with custom-made optics. Its calibration module (optional) enables easy calibration using an Argon/neon lamp, providing a large number of emission lines over the entire LISA spectral range. The same module is equipped with a tungsten lamp for flats.

 

 

A wide spectral range

With a resolving power of R = 1,000 with a 23 µm slit, its spectral range covers the entire visible range between 400 and 700 nm, and even extends into the near UV and near IR. 

lisa bsp Spektrum

Aperture

The LISA’s F/5 aperture makes it particularly well suited to faint objects, and it can be installed on telescopes or scopes natively f/5, but also on any type of Schmidt Cassegrain or Ritchey Chretien telescope using a focal reducer to bring the native focal length of this type of telescope, generally f/10 or f/8, down to a focal length close to 5.

Guiding system

Thanks to its mirror slit, the Lisa accurately positions and holds the target in the slit. A guiding camera (not supplied) enables the telescope’s movements to be controlled (autoguiding), ensuring optimum observation.

Lisa bsp 1

Interchangeable slit

The interchangeable slit supplied as standard (15-19-23-35µm) makes it possible to adapt the instrument to any observational situation, giving priority to resolution or brightness if required. Other slits are also available as options (wide slits, photometric slits), to further extend the possibilities.

lisa slit

 

lisa bsp aufbau

Mechanical interfaces

The LISA is supplied as standard with a 2″ nosepiece. The nosepiece can be removed to access an T-mount female thread (M42x0.75mm thread). For mounting on a classic Schmidt-Cassegrain telescope (2″ external thread), you’ll need the BA0027 variable T-adapter.

The interface with the acquisition camera is also a T-mount thread (M42x0.75mm) with a 54.9 mm backfocus, while the guiding camera port is C-mount with a 17.5 mm backfocus.

For cameras, you need a 13mm long ring (13mm mechanical backfocus), supplied with the LISA. We offer a wide choice of adapter rings in our accessories catalog.

Going even further with LISA

In addition to the astrophysical knowledge that LISA can provide, it is also a tool for collaboration between amateur and professional astronomers: study of nova, supernova, comets, symbiotic stars, confirmation of planetary nebulae… Numerous scientific publications have been produced on the basis of LISA observations. like this one.

lisa bsp spektrum 2Other publications or first spectra are regularly produced with a LISA. For instance:
ATEL Observation Ha in SS433
Optical Spectroscopy of Classical Nova ASASSN-16ig (Nova Sgr 2016 no. 2)
Monitoring of the slow classical nova Sct 2017

The support of a large community

LISA is used all over the world, and you can find many examples of its use and advice on the spectro-L discussion list or on the spectroscopy forum: ARAS

 

 

Slits

Slits : technical specifications

Description Shelyak ref. Included

Material (% reflexion)

Mirror size

AR coating

Comment
Multiple slit 15/19/23/35 µm SE0116 Chromium (55%) 17 x 17 mm 400 – 700 nm Slits 15, 19, 23, 35μm
Photométric slit 23/27/31/35 µm SE0194   Chromium (55%) 17 x 17 mm 400 – 700 nm 23/200, 27/250, 31/300, 35/350μm
Wide slit 19/50/75/100 µm SE0122   Chromium (55%) 17 x 17 mm 400 – 700 nm Hole 19μm + slits 50, 75, 100 μm
LISA slit holder SE0193       To add for all optional slits

 

Grating module : technical specifications

Description Shelyak ref. Included

R @650 nm

Dispersion (nm/mm)

Blaze

Grating LISA 300 t/mm   1000   500 nm

 

Additional modules: technical specifications

Description Shelyak ref. Acc. type Included Comment
LISA internal guiding module   Guiding module Built-in LISA
Internal LISA calibration module SE0103 Calibration module   Includes Ar-Ne calibration lamp and flat lamp (tungsten)

Specifications

  • Collimator F=130mm F/5
  • High efficiency thanks to internal focus reducer
  • Resolution power R ~1000 with a 23 µm slit
  • Grating 300 tr/mm blazed à 500nm
  • Visible domain (400-700nm)
  • Slit 15/19/23/35µm
  • Slit length : 4 mm
  • Weight: 1.4 kg (w/o caméra)
  • Telescope Interface T-mount (M42*0.75), backfocus 41mm
  • Science camera interface, T mount, M42*0.75, backfocus 54.9 mm
  • Guiding camera interface, C-mount, backfocus 17.5 mm

 lisa cali

This calibration module complements your LISA spectroscope, especially for remote observations. It includes a flat (halogen) lamp and a calibration (Ar-Ne) lamp.

Power supply via two 12V inputs (one for each lamp). 5.5 / 2.5mm connectors, positive at center.


Composition

  • LISA Spectroscope
  • Interchangeable slit : 15, 19, 23, 35μm
  • Adapter for 13mm backfocus camera

Applications

  • Calculating the redshift of distant galaxies and quasars
  • Confirmation of Planetary Nebula candidates
  • Spectra of faint Be stars
  • Studies of star spectral classes
  • Spectra of faint objects (Novae, Supernovae, Comets)

slit

Standard reflective slits for LISA and LHIRES III (4 positions of 15/19/23/35 µm).An additional set allows quick slit changes.
Must be combined with the matching slit holder for your spectroscope. LISA or Lhires III Spectroscope.
Can also be used with a Sol’Ex for stellar observations. In this case, the guiding module is required.

slitholder

Slit Holder

To extend the possibilities of Lhires III. Allows you to change slit quickly.
Can be combined with wide slit, photometric slit or standard slit.

For LISA or Lhires III

Other slits

 

Wwide slitide slit 50/75/100 µm and hole 19 µm

Set of wide slits for LISA or Lhires III spectroscopes.

Must be combined with the matching slit holder for your spectroscope. LISA or Lhires III.

One 19µm hole (in the middle of 2 1/2 19 µm slit) and three 50, 75 and 100 µm slits. Selection is made by rotating the square support. The 19µm hole is ideal for adjusting the instrument.

Please note that an optional holder is required for the slit

slitholder

Slit Holder

To extend the possibilities of Lhires III. Allows you to change slit quickly. Can be combined with wide slit, photometric slit or standard slit.

For LISA or Lhires III

 


foto slit

LISA & Lhires III Photometric Slit

Additional slit set for LISA or Lhires III with four stepped slits. These slits are specially designed for spectrophotometry.
To be combined with the slit holder corresponding to the spectroscope: LISA or Lhires III

These slits, which can be used with the Lhires III or LISA, have two widths: a narrow part for full instrument resolution, and a wide part to ensure that all the star’s light is collected. By combining observations of the same star with these two slits, you can perform spectro-photometry, i.e. obtain not only the star’s spectrum, but also its total luminosity (photometry).

Four positions available:

  • 23/200µm
  • 27/250µm
  • 31/300µm
  • 35/350µm

 LISA Workshop

 

Feedback from users :

Report on mission to St-Véran observatory : http://o.garde.free.fr/RapportMissionCALAI-2016BD.pdf Mission report to C2PU Calern : http://o.garde.free.fr/RapportMissionCalern2017.pdf

F. Teyssier: http://www.astronomie-amateur.fr/feuilles/Spectroscopie/SyS/V407%20Cyg.html

C. Buil: http://astrosurf.com/buil/cicyg/obs.htm

F. Teyssier article: http://www.astronomie-amateur.fr/Documents%20Spectro/ej143.pdf

APM Professional Telescopes

1m F/8 Ritchey Chrétien with dual Nasmyth Foci, Cape Town (South Africa)

Another large telescope for the South African Astronomical Observatory (SAAO). An 1m F/8 Alt-Az mounted Ritchey Chrétien for robotic use. It has dual Nasmyth Foci. The main telescopes used for research are located at the SAAO observing station (32°22.795’S 20°48,657’E) near Sutherland in the Northern Cape, a 4-hour drive from Cape Town.

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