April 2, 2015: Dr. Axel Schwope (Leibniz Institute for Astrophysics Potsdam, Germany) has requested AAVSO observers' assistance in monitoring the magnetic variable AM Her in support of upcoming XMM-Newton plus NuSTAR (Nuclear Spectroscopic Telescope Array) observations.
The XMM-Newton observations are scheduled for 2015 April 06 02:37:02-15:07:02 UT. The NuSTAR observations have not been made final yet but are expected to run longer. A Special Notice will be issued when the NuSTAR schedule is known.
February 6, 2006: The DQ Her-type (intermediate polar) magnetic variable DO Dra is in outburst. This star has outbursts at irregular intervals that last only 4-5 days. The
last outburst reported in the AAVSO International Database occurred in March
2005, when the star reached visual magnitude 11.2.
THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
25 Birch Street, Cambridge, MA 02138 USA
INTERNET: aavso@aavso.org
Tel. 617-354-0484 Fax 617-354-0665
AAVSO ALERT NOTICE 290 (September 20, 2001)
0341-44B SUPERNOVA 2001el IN NGC 1448 (HOROLOGIUM)
SUBJECT:
1. MULTICOLOR CCD CAMPAIGN FOR AM HER TO SUPPORT XMM NEWTON OBSERVATIONS
2. BP HYI ECLIPSING BINARY CAMPAIGN
1. MULTICOLOR CCD CAMPAIGN FOR AM HER TO SUPPORT XMM NEWTON OBSERVATIONS
Summary
The polar AM Her is going to be observed with the XMM Newton satellite observatory later this month. We have been asked to coordinate multicolor CCD ground based photometry during the observing periods.
