The Whoppshel, a high resolution echelle spectroscope (about R=30000)
The Whoppshel, a high resolution echelle spectroscope
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Tutos and docs
Nearby or in thousands of km, take control of your calibration & flat lamps for Alpy, Lhires III and LISA.
SPOX module : to remotely control the flat and calibration lamps for Alpy 600, Lhires III and LISA.
Quasar spectrum with a Lisa or an Alpy
Realize a spectrum of a very weak object with a LIsa or an Alpy, it is possible.
Spectro Party OHP 2018 : retrospective
Retrospective of Spectro star party OHP 2018, photos, spectra and more…
The hunt for Be stars outbursts
What about chasing Be stars outbursts this week-end ? All you need is a good spectro !
Improved performance of the eShel spectroscope
eShel II: a new optimized doublet “bespoke” for the blue end
AG Draconis, Shelyak Spectros in the spotlight
Spectra made with Shelyak spectroscopes were used in a publication on the symbiotic star AG Draconis.
Planetary nebulae confirmation
How to confirm a planetary nebulae candidate ?
One week-end dedicated to Spectroscopy, organised by BAA
o promote astronomical spectroscopy, British Astronomical Association (BAA) organised last year a program including financial help for buying spectroscopes (Alpy made by SHELYAK Instruments)
Scientific papers, radial velocities and eShel
Scientific papers, radial velocities and eShel SHELYAK Instruments has sold many eShel to professional observatories around the world. The results enable our clients to advance science with paperss. We do not systematically refer to these papers because there...
Making Science with an Alpy
Making Science with an Alpy The last paper in Astronomy & Astrophysics magazine (A&A) “New outburst of the symbiotic nova AG Peg after 165 years “ is based on spectra collected by observers from all around the world (12 nations represented) with...
Spectroscopy : practical guide
Spectroscopy : practical guide The french version of the book is now a reference in the Astronomical community. It has been rewarded by a lot of great comments from readers, and papers in magazines. It is now available in english : Successfully Starting in...
How to measure the redshift of a galaxy ?
Comment mesurer le redshift d’une galaxie lointaine avec un spectrographe basse résolution.
Symbiotics stars
Symbiotics stars Recommended equipment : Star Analyser, Lhires III, eShel, Alpy, Lisa Time : one night or a life time ! Summary Symbiotic stars are interacting binary red giant & hot stars. The red giant loose material which is accreted by the hot star...
Del Sco : 2011 campaign for periastron
Del Sco : 2011 campaign for periastron Be stars are hot, non supergiants stars whose spectra have shown or still show spectral emission in Balmer line - typically Halpha. Those emissions comes from material around the star - often an equatorial disk or ring. Those...
Beta Lyrae – Shelyak !
Beta Lyrae - Shelyak ! Well... beta Lyrae is a special star for us as its arabic name is Shelyak, the origin of the Shelyak Instruments company name. Few years ago, we spent couple of week studying this star spectroscopically. This is a Be star (see article about this...
Be stars
Be stars Recommended equipment : Lhires III, eShel, Lisa, Alpy Time : one evening to a life time ! Abstract Classical Be stars are non supergiant B-type stars that exhibit or have exhibit emission lines over the photospheric spectrum. This article review common...
Beta Aurigae spectroscopic binary
Beta Aurigae spectroscopic binary Recommended equipment : Lhires III, eShel Time : several observing nights Summary Grâce à la haute résolution du Lhires III, il est possible de séparer de nombreuses étoiles binaires spectroscopiques. Ces étoiles, qui n'apparaissent...
RV (Radial Velocity)
RV (Radial Velocity) Recommended equipment : eShel, Lhires III Time : 1 h Stars are moving into space and their spectra appear shifted compared to the same lines in laboratory. Exemple here is SAO104807 which is moving toward us at a speed of 100 km/Sec and SAP112958...
Lithium star : 59 Vir
Lithium star : 59 Vir Recommended equipment : eShel, Lhires III Time : one evening (acquisition) 59 Vir is a G0V type star, close to solar spectral type. But its spectrum display a stroing Li I (6708) absorption line. This star is rather young and lithium will...