Educational Files (free download)


LRGB Composite (English):
LERN HOW TO COMPOSE A COLOR FOTO FROM ITS RED-GREEN-BLUE COMPONENTS.
This is a photo (raw data) of the M1 supernova remnant in Taurus.
It is available as an LRGB composite (L=Luminance, R=Red, G=Green, B=Blue)
Download it right now for free. Just click on the link below:
M1_nebula in Taurus.zip (Copyright (c) by Panagiotis Xipteras, www.AstroDigital.Net)
You need special astrophotographic software to process this file. Try:
Maxim DL - (Windows, 30 days trial version available)
CCDOps - (Mac / Windows, freeware)
CCDSoft - (Windows)
You may use this LRGB composite in a field of science without my written permission, but you are kindly requested to mention/reference the copyright information in your scientific work. Thank you.


Add 21 photos (English):
LERN HOW TO ADD FOTOS to improve the S/N ratio and to gain more image details.
Here are 21 shots (raw data) of Saturn.
Download it right now for free. Just click on the link below:
21 photos of Saturn.zip (Copyright (c) by Panagiotis Xipteras, www.AstroDigital.Net)
You need special astrophotographic software to process this file. Try:
GIOTTO - (Windows, freeware)
Keith's Image Stacker - (Mac, freeware)
Registax - (Windows, freeware)
You may use these photos in a field of science without my written permission, but you are kindly requested to mention/reference the copyright information in your scientific work. Thank you.


The exposure time of the LRGB photo components (English):
LERN HOW MANY COMPONENTS YOU BASICALLY NEED TO COMPOSE A COLOR PHOTO.
This is a pdf file describing the exposure time and the components of a LRGB astrophoto, using the SBIG ST7/ST8 astrocamera.
Download it right now for free. Just click on the link below:
LRGB with ST7.zip


Vignettierung entfernen (German):
LERNEN SIE, WIE MAN DIE VIGNETTIERUNG VON ASTROFOTOS ENTERNEN KANN.
In der beiliegenden pdf Datei erfahren Sie wie man in Photoshop bzw. Photoshop-Elements die Vignettierung in einem Astrofoto entfernen kann. Die Vignettierung wird vom Objektiv verursacht. Überzeugen Sie sich selbst von der Wirkung eines solchen Optimierungsschrittes (Bild vorher, Bild nachher). Der Download ist frei. Klicken Sie auf den folgenden Link um das "Kochrezept" runterzulanden.
Vignettierung_Entfernen.zip


Other scripts and documents:
Calculate the required aperture of a reflector to much a refractor (German): Spiegel Linse_4_OpenOffice.sxc
The frequency spectrum (German and English): Frequenzspektrum.psd
Photo processing. Learn how to bright your astrophotos (German): Dunkle-Bereiche-aufhellen.pdf
Photo processing. Learn how to sharp your astrophotos (German): Astrofotos_schaerfen-HOWTO.pdf
Statistics (German and English): Cloudy-days-in-Stuttgart.pdf
Formulas to calculate your telescope (German): Teleskop_Berechnung.pdf
Polar alignment using the declination drift method (English): Polar Alignment.pdf
A focussing aid for your 4" Takahashi (tm) telescope (German and English): FS102 TSA102 Hartmann Mask.odg
A focussing aid for your 2.7" Takahashi (tm) telescope (German and English): FS60 Hartmann Mask.odg
Photography: the dependancy between the exposure time and the focal ratio (German): Blende_und_Belichtungszeit.pdf