Hel 6678 line | aavso

Alert Notice 707: Campaign Monitoring of the Helium double peak emission at 6678 Å in gamma Cas - Update to Alert Notice 694

Reminder: High-resolution spectroscopy (10,000 or higher) is needed. - Elizabeth O. Waagen, 1 February 2021

June 17, 2020

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AAVSO Alert Notice

AAVSO Alert Notice 694

AAVSO Spectroscopy Database (AVSpec)

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