magnetic variables

Alert Notice 322: Multicolor CCD campaign for AM Her to support XMM Newton observations AND BP Hyi eclipsing binary campaign

July 14, 2005

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.

Alert Notice 365: Request to Monitor EF Eri for Hubble Space Telescope Observations

January 6, 2008: Dr. Paula Szkody (University of Washington) has requested our help in monitoring the magnetic cataclysmic variable EF Eri for upcoming Hubble Space Telescope observations. Confirming observations are requested to ensure that EF Eri is fainter than the safe observing threshold during the HST observing window on 2008 January 17 UT.

EF Eri is at RA = 03:14:13.20 , Dec = -22:35:43.0 (J2000).

Alert Notice 406: Observing Campaign to Monitor Magnetically-Active Dwarfs for Long-Term Variability

October 7, 2009
 

The observers of the AAVSO are asked to participate in a long-term photometric monitoring campaign on a number of magnetically active dwarf stars, requested by Dr. Styliani (Stella) Kafka of the Department of Terrestrial Magnetism, Carnegie Institute of Washington.  She requests long-term monitoring of these targets with an observing frequency of one observation every three days taken with one or more filters.

Alert Notice 414: Request for Observations of V405 Peg

December 17, 2009: Dr. Axel Schwope (Astrophysikalisches Institut Potsdam) requests time-series monitoring of the magnetic cataclysmic variable V405 Pegasi, beginning 2009 December 28 (JD 2455193.5) and continuing through 2009 December 30 (JD 2455196.5). These observations are requested in support of a planned XMM-Newton observation of V405 Peg on 2009 December 29 beginning at 18:51 UT (JD 2455195.2854) and continuing for 12.5 hours.