Anatoly Miroshnichenko publication "The 2011 Periastron Passage of the Be Binary delta Scorpii" is available on arXiv http://arxiv.org/abs/1302.4021 Many amateurs has contributed to this campaign. 50% of the sepctra are from Amateur, about 300. A lot...

Miroshnichenko_DeltaSco_Iguassu_2012 Talk of Anatoly Miroshnichenko on delta sco 2010/2011 at Feb, 2012 ESO conference on hot stars in Brazil

For nine nights i have been there in good compagny. http://www.iac.es/eno.php?op1=3&lang=en This mission was about the peri-astron of delta scopii and was a real success. We have got in nine nights 30 Halpha spectra, 30 HeII 4500, 4686 and one H gamma....