Imaging: Imaging: 1st calibration spectra: red or blue. Image 1st star: eps Aur or 1544, 5 min. Slew/image 2nd star: same wavelength. 2nd cal. spectra: re-image both stars. All images: x2 Dark frames: x10
Processing: IRAF Starting point for analysis: Raw eps Aur / red. Intensity level vs. pixel number.
Raw HR1544 / red. Standard star, used to flux calibrate eps Aur. -Taken the same night. Processing: IRAF
Flux calibrated epsilon Aurigae in red. Intensity vs. wavelength.
Magnified view of the hydrogen alpha line of Almaaz. March 30, 2009