A test of the new Shelyak Alpy 600 low resolution spectrograph showing a sequence of OBAFGKM stars.
A basic Spectral sequence from Type-B to Type-M. The data was corrected and reduced using ISIS (click to enlarge).
R = 568 @ 6402Å
1. Type B5V2. Type A5V3. Type F5V5. Type G5V6. Type K5III7. Type M4/M58. HD 157832 in the constellation of Ara showing the strong H-a emission typical of Be stars:9. HD 156385, a Wolf-Rayet star in the constellation of Ara: