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Uwe Zurmühl, Giesen / ASpekt 4.-5.2019 Anthering / Salzburg ED80/500 with ATIK One Camera 10“ SCT with Spectrometer Setup Grang + Prisms in front of ATIK One Spectrometer Configuraon: Prism-Grang-Prism („Grisym“) Measuring Setups 10“ SCT Telescope APO Refractors (80/500 mm, 102/714 mm) Slitless Grang / Prisms Combinaons in convergent Beam Grangs: 200 L/mm, 300 L/mm, 600 L/mm, 830 L/mm Resoluon Δλ = 2 Å … 8 Å Stars on the AGB C / O Core He & H shell burning (alternang) Phases of thermal instability (thermal pulse) Dredge-up episodes Enrichment of s-process elements (e.g. 99 TC) High mass loss Long period variables (LPV) region, Mira types References Molecule band wavelengths according to Richard Walker: „Spectral Atlas for Amateur Astronomers“, Cambridge University Press 2017 V-band magnitudes , epoch and period informaon taken from the AAVSO Internaonal Database Spectral Characteriscs TiO bands (M-type) ZrO bands (S-type) C 2 and SiC bands (C-type) Na-D somemes extremely strong Variable emission of Balmer and metal lines (shock induced) R And Type: S5-7/4-5e Period: 409,20 d leſt: 21.10.18 Phase: 0.23 V: 8.4 mag boom: 30.07.18 Phase: 0.02 V: 6.7 mag W Ori Type: C-N5 Period: 212 d (semiregular) 19.01.19 V: 5.5 mag WZ Cas Type: C-N7III („Lithium Star“) Period: 186 d (semiregular) 19.08.18 V: 7.5 mag W Ori Close-Up SiC 2 (Merrill Sanfords Bands) 5.10.18 V: 5.7 mag R Cas Type: M6.5-9e Period: 431.86 d 30.7.18 Phase: 0.09 V: 8.0 mag
