Quierschieder Weg 38, 66280 Sulzbach anfrage@apm-telescopes.de

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.

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)

eShel II complete system

Te shel2he eShel spctro is a professional-level multi-order fiber-optic instrument.
When you can’t choose between resolution and spectral range – as in the case of exoplanet studies, for example – then you need an Echelle spectroscope, which offers numerous orders at high resolution (R = 10,000).
The eShel spectroscope covers a spectral range of approximately 390 to 700nm (orders 32 to 53).The complete eShel system includes the spectroscope itself, as well as the FIGU F/6 (Fiber Injection and Guiding Unit), the calibration module (with ThAr lamp), and the optical fibers (target 50µm and calibration 200µm, both 20m long).

A fiber-fed spectroscope

The eShel spectroscope can work over a wide spectral range (390 to 700nm) at high resolution (R = 10,000). This is made possible by the use of multiple orders (in this case from 32 to 53); an Echelle spectrum reads “like a book”: the end of one order is found at the beginning of the next. We opted for a fiber-optic solution to increase the accuracy of radial velocity measurements (the instrument is separated from the telescope, if possible in a temperature-controlled room) and for greater user comfort.We have developed this instrument based on our experience with the Musicos and Narval professional spectroscopes.

Echelle spectroscopy

This technique achieves high spectral resolution by using the >30 diffraction orders of a grating. The resulting spectrum passes through a cross disperser, which “slices” the spectrum into successive orders, occupying the entire surface of the camera’s sensor. In this way, the entire spectral range in the visible spectrum is obtained over some twenty orders (in the case of the eShel).Schema EchelleSchematic diagram of an Echelle spectrograph (© Christian Buil)

The eShel spectroscope

EshelDetour 231x300dsco 1The main module generates the Echelle spectrum. It covers the spectral range from approx. 390 to 700 nm with >10000 resolution (with an ATIK 460 Ex camera in 2×2 binning not included). It has an FC/PC connector for attaching 50 µm object fiber.Spectrum of delta Sco (Be star). Note the H-alpha line in emission (click on image to enlarge). Canon 40D, 9 x 300 s, telescope 0,2m (C.Buil)The eShel spectroscope must be accompanied by the FIGU – Fiber Injection and Guiding Unit – (PF0008, for example), the calibration module (PF0012) and the two optical fibers: one for the target and the other for calibration. All these elements are included in the ES0006 “eShel complete system”.

 

Demetra software for eShel

Easy to use and free of charge, it runs under MS Windows, and accompanies you from spectra acquisition to data reduction. It enables remote control of the various modules (FIGU and calibration module).

Examples of raw spectra

 betlyr 50pc 1betlyr 50pc  pcyg 50pc 1pcyg 50pc WR140 6 64293 1080x675 WR140-6


WR 140 and Nova Del 2013 1x600s SCT 0,35 m and ATIK 460EX bin 2×2 (Click to enlarge)

Example of time series of a pulsating star

BWVul anim20080726crop 1

Here’s a good example of evolution of a pulsating star (BW Vul, raw images, 5min exposures, 60cm f/3.5 telescope at Pic du Midi; ccd camera QSI516).

 

 

 

BW Vul p17 1

The BW Vul spectrogram over about 5h around the Sodium doublet:

 

 

 

 

Calibrations modul eShel II

It delivers the various light sources used to calibrate the spectrum:

F/6 FIGU: Fiber Injection and Guiding Unit (PF0008)

It injects the target’s flux into the eShel’s optical fiber. A guiding camera (not included) ensures target centering and autoguiding on the 50 μm fiber optic input. Calibration lamps can also be injected from the calibration module via a 200 µm optical fiber also connected to the FIGU. A remote-controlled mirror allows you to switch from one source to another. (F/9 and other F-ratios available – contact us)

T-mount adapter ring for SCT

for attaching the eShel FIGU to a Schmidt-Cassegrain telescope (typically with a 0.63x focal reducer)

50µm object fiber

(20 meters, other lengths on request)

Calibration optical fiber 200µm

(20 meters, other lengths on request)

Specifications

Composition

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.

Creative Contact Form

Contact Us
Feel free to contact us if you have any questions

COMPANY HQ

APM Telescopes
Quierschieder Weg 38
66280 Sulzbach
GERMANY

Telefon: +49 (0)6897 - 924929-0
Fax:       +49 (0)6897 - 924929-9
E-Mail: info@apm-telescopes.de
WWW: https://www.apm-professional-telescopes.com

Wir benutzen Cookies

Wir nutzen Cookies auf unserer Website. Einige von ihnen sind essenziell für den Betrieb der Seite, während andere uns helfen, diese Website und die Nutzererfahrung zu verbessern (Tracking Cookies). Sie können selbst entscheiden, ob Sie die Cookies zulassen möchten. Bitte beachten Sie, dass bei einer Ablehnung womöglich nicht mehr alle Funktionalitäten der Seite zur Verfügung stehen.