The Whoppshel, a high resolution echelle spectroscope
The Whoppshel, a high resolution echelle spectroscope (about R=30000)
Spectropolarimetry or how to observe the magnetic field of a star with a 72mm telescope and a 3D printed spectrograph
By Guillaume BertrandI started astronomy at the age of 15, in 2003, with the opposition of Mars. I quickly joined the astronomy club "Village du ciel" based in Vendée to exchange with other amateur astronomers. My first instrument was a 114/900, I got all the...
Sol’Ex & Star’EX: a new way to approach astronomy
By François Cochard & Christian Buil The Sol'Ex project (later followed by Star'Ex) offers a new way of "entering Astronomy": it is an approach that is affordable, simple, fun and fascinating. Here is what it is in a nutshell.Sol'Ex, to startSol'Ex is a project...
The Time Box: Use for dating asteroid occultations
The TimeBoxUse for asteroid occultation dating. By Daniel Verilhac, amateur astronomerIntroductionThe observation of stars occultations by asteroids is an exciting sport, it allows with few means to contribute to science. It is an excellent playground for amateurs...
2SPOT: a spectro setup in Chile
2SPOT: a spectro setup in ChileBy Olivier Garde, Pascal Le Dû, Lionel Mulato, Thomas Petit, Stéphane Charbonnel© Deep Sky Chile spotSince the 2000s, many amateurs have been installing remotely controllable telescopes on sites in Chile in order to compensate for the...
Spectro Star Party – OHP 2022
Book your week from July 25 to 30, 2022.Every year, Association Aude and Shelyak Instruments organize the Spectro Star Party at the Observatoire de Haute Provence, in St Michel l’Observatoire, near Manosque in southern France. This event is an opportunity to observe...
Sn 1181, an unusual story …
At first glance, it is curiosity that motivates any amateur who observes the sky. Sometimes this curiosity is rewarded by acquiring a very beautiful picture or by explaining a physical phenomenon that takes place thousands of light years from Earth, through spectroscopic observation.
UVEX : Extreme spectra
UVEX is a multi purpose spectrograph allowing spectra to be performed in the near IR and near UV domains but also on weak targets.
RS Oph : the contribution of Shelyak spectrographs
On August 8, 2021, the recurrent nova RS Oph was observed in outburst at magnitude V = 5. The amateur community immediately mobilized to realize many spectra at various resolutions with various spectrographs (with resolving powers R = 600 to R = 30,000).
UVEX, to write a new page in astronomy
UVEX, to write a new page in astronomy by François CochardWe are happy to announce the arrival of a new instrument in the Shelyak range. This event is important for several reasons. It's a sign of the dynamism of the astronomical community, which always pushes the...
Spectroscopic Observations on Beta Persei (Algol)
During my program “Spectroscopic Detection of Interstellar Sodium” I also came across Algol. Because of unclear Na lines, I took new recordings later. I noticed the different position of the HeI line (5875.62 Å) and the greatly changed shape of the Na-D lines.
Creating an image via spectral scans
Take narrow band images from a single spectral scan with an Alpy 600.
UVEX by Shelyak : first light
The very first tests of the UVEX prototype produced by Shelyak Instrument.
The twin Quasar
taken a twin quasar spectrum with an Alpy 600
OHP Spectro Star Party 2020
Spectro star party OHP 2020 : from 12th to 17th August 2020
TimeBox : to accurately measure an occultation
Timing of astronomical occultations and other astronomical phenomena need to be done in an absolute time scale with a precision of a few milliseconds in order to pull and compare recordings done by different observers around the world.
Demetra 5.1 : A major development
Demetra 5.1, new graphics function
How to choose your autoguiding camera in 2020 ?
In astronomical spectroscopy, guiding camera is an important element, since it’s what makes it possible to point the right target (star, nebula, etc.), then to ensure precise guiding to inject the maximum light into the spectrograph slit.
The Whoppshel in action on a 60 cm telescope
Using a Whoppshel spectrograph R = 30000 on a 600mm telescope at the Hubert Reeves observatory in Mars (Ardèche-south of France)
Demetra : a new version is available
Enhancements of the new version of Demetra 184.108.40.206 Alpy
Spectro Party OHP 2019 : retrospective
Retrospective of Spectro party 2019 at OHP, photos, spectra and more…