The 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.
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.
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.
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.
Other 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
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Composition
Applications
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Other slits
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LISA & Lhires III Photometric SlitAdditional slit set for LISA or Lhires III with four stepped slits. These slits are specially designed for spectrophotometry. 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).
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LISA Workshop
Feedback from users :
- First light with a LISA by Christian: Buil:http://astrosurf.com/buil/lisa3/test.htm
- First lights with a LISA by François Teyssier: http://www.astronomie-amateur.fr/Lisa.html
- First steps with a LISA (David Boyd): http://www.britastro.org/vss/First%20steps%20in%20Spectroscopy.pdf
- Confirmations of planetary nebulae (O. Garde – P. Le Dû) :
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
- Observation with a LISA by Christian Buil: http://astrosurf.com/buil/lisa6/obs.htm
- A LISA on the T1M at Pic du Midi: http://astrosurf.com/buil/lisa4/pic_du_midi.htm
- Comet C/2009 P1 (Garradd): http://astrosurf.com/buil/garradd/obs.htm
- Herbig Ae/Be Z CMa (several spectrographs): http://astrosurf.com/aras/surveys/prestars/zcma/zcma.html
- Symbiothic star V407 Cyg: ARAS: http://astrosurf.com/aras/V407Cyg/v407cyg.htm
F. Teyssier: http://www.astronomie-amateur.fr/feuilles/Spectroscopie/SyS/V407%20Cyg.html
- Symbiothique star CI Cyg : ARAS: http://www.astrosurf.com/aras/CICyg/CI_Cyg.html
C. Buil: http://astrosurf.com/buil/cicyg/obs.htm
F. Teyssier article: http://www.astronomie-amateur.fr/Documents%20Spectro/ej143.pdf
- Very short-term temporal evolution of the cataclysmic variable DQ Her (nova Herculis 1934): http://astrosurf.com/buil/forum/dqher_poster.png
- Recurrent Nova T pyxidis (several spectrographs): http://astrosurf.com/aras/surveys/novae/tpyx/tpyx.htm
- Supernovae 2011: http://astrosurf.com/buil/supernovae/2011/obs.htm
- SN2011dh in M51 (several spectrographes): http://astrosurf.com/aras/surveys/supernovae/sn2011dh/obs.htm
- NGC7331: http://astrosurf.com/buil/forum/ngc7331_poster.png
- A somewhat subtle observation by Christian Buil and Valérie Desnoux, but also a bit mythical, which highlights the rotation of a galaxy on itself (NGC 7331). The power and good shape of the T60 (Pic du Midi) combined with the LISA spectroscope make an exceptional pair.
- Quintet of Stephan: http://astrosurf.com/buil/forum/stephan_poster.png
- Spectroscopic observations of Nova Delphini 2013 [= V339 Delphini], David Boyd, Journal of British Astronomical Association 123, 5, 2013, p 302 : http://www.britastro.org/vss/Spectral%20evolution%20of%20Nova%20Delphini%202013%20(V339%20Del).pdf
