The BRITE Collaboration
The BRITE constellation is a consortium between Austria, Canada and Poland. Each country controls two micro-satellites, one doing photometry in red and the other in blue.
For more info, see this page:
Brite Constellation Ground Based Observing Team
For the 2014/2015 Winter/Spring, the satellites are focused in the bright stars of the Orion constellation, Meissa, Alnilam, Alnitak and Saiph.
Spectroscopic observations are needed. The variability of these stars is enormous:
Meissa is a massive binary. Are there white spots at the primary surface?
Meissa variability of Hα
Not a big variability observed in the Hα line, nor in the 6678 HeI line:
Alnilam is a massive supergiant. Its followup is important because it is a prime candidate for the detection of magnetic spots on its surface.
Alnilam variability of Hα
A big variability is observed in the Hα line, but not so much in the 6678 HeI line:
Alnitak is a triple star system. Its primary is is the brightest O star in the night sky.
Alnitak variability of Hα:
A big variability is observed in the Hα line, but not in the 6678 HeI line:
Saiph is a massive supergiant similar to Alnilam. Will the behaviours of both be similar?
Saiph variability of Hα:
A big variability is observed in the Hα line, but not too much in the 6678 HeI line: