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Special Notice #401: AM Her NuSTAR observations April 5

April 3, 2015: Further to AAVSO Alert Notice 517 (www.aavso.org/aavso-alert-notice-517), Dr. Axel Schwope (Leibniz Institute for Astrophysics Potsdam, Germany) informs us that the NuSTAR X-ray observations of AM Her will take place on

2015 April 5  15:35 UTC - April 6 19:15 UTC

These NuSTAR observations overlap with the XMM-Newton observations scheduled for April 6.

Filtered photometry with standard filter (BVRI) is requested using the cadence given in Alert Notice 517.  

The question has been asked whether visual observations are requested for this campaign. They would be helpful in order to know whether AM Her is in its high or low state. However, the behavioral information the astronomers need for more detailed correlation with the x-ray observations requires the higher precision of photometry with S/N~10.

Coordinates:  R.A. 18 16 13.34   Dec. +49 52 04.1  (2000.0)

Many thanks for your observing efforts!

This AAVSO Special Notice was compiled by Elizabeth O. Waagen.

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