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:

 

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