Ha spectrum of Gamma Cassiopeiae - Tsih - HD 5394 - SAO 11482 [B0IVe] - 2015-09-21 - Astrophoto

Astro-Imaging - Spectroscopy - Software Development
Manfred Schwarz - Austria
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Ha spectrum of Gamma Cassiopeiae - Tsih - HD 5394 - SAO 11482 [B0IVe] - 2015-09-21

Specs



Tsih is a typical Be star, that means there is a disk of gas around the star. The emission lines are caused by this disk.
The star rotates very fast (~ 300km/s). This could be one reason for this disk.
Telescope: Officina Stellare RC360AS, f/8, d=360mm
Spectrograph: Lhires III, 2400gr, slit 23u    Resolution: 0.09 Å / pixel, resolving power = 17000
Camera: SBIG ST10-Xe    Acquisition software: SbigControl   Guiding Software: DMKguider
Date: 21. September 2015,  20:41- 21:31 UT, JD 2457287.38
Spectra with 2400 lines/mm, processed with BASS project
Calibrated with on atmospheric H2O lines, normalized flux
8 images, each 5 minutes (40 minutes)
Dark corrected, cropped, enlarged by factor 4 and stacked with Pxinsight
Calibrated, RV-measure with HRV-MM2. Problem with dew on the Schmidt-plate
Download spectrum DAT:  gamCas_20150921_Ha.DAT
Download spectrum 1D FIT: gamCas_20150921_Ha.FIT
Download BASS project bundle: gamCas_20150921_Ha.bun
Download complete project(2.3MB): gamCas_20150921.zip
Stellar data (Wikipedia.org):
Constellation: Cassiopeia, RA: 00h 56m 42.50108s, Dec: +60° 43′ 00.2984″
v = 2.47 mag, Mv = -4 mag
Rv = -6.8 km/s
Distance: 550 +- 10 ly, 168 +-3 pc
Mass: 19.3 +-0.1 MΘ
Radius: ~ 10 RΘ
Luninosity: 55000 LΘ
Rotational velocity: ~300 km/s
Age: 8 +-0.4 x 10^6 years
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