The 2011 Periastron Passage of the Be Binary delta Scorpii, Final publication

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 of questions are still in the air as a third component is possible. So rendez vous in 8 years.

Publication in ApJ is scheduled in April.

I was particpating to this campaign both at IAC80, with Anatoly, Alberto, Jose for ten days in July 2011, and with my own spectroscpe eshel and LhiresIII specially in the blue domain (4686 HeII) until the end of visibility from my site. It was a wonderfull and exemplary cooperation still active.