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CVs to be monitored for HST COS observations

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weo
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AAVSO Alert Notice 471 has been emailed and posted to the AAVSO website. AAVSO observers have been asked to monitor about 40 CVs (not all at the same time!) in support of HST Cosmic Origins Spectrograph (COS) observations. Please read about this important campaign and help out if you can - your observations will be critical to its success. The first target, SDSS J164248.52+134751.4, will be observed in mid-October, and nightly observations are needed beginning immediately.  Thank you, and good observing, Elizabeth Waagen

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