PLEASE GO TO ALERT NOTICE 820 FOR CURRENT OBSERVING REQUEST. - Elizabeth O. Waagen, April 19, 20232
Note: The Chandra observations of September 26 were carried out successfully. Additional Chandra observations are scheduled for October 3 and 4. Please continue to monitor R Aqr through the end of the observing season and through 2023. - Elizabeth O. Waagen, 3 October 2022
September 21, 2022
November 20, 2007
1. X-ray Transient/Nova = V598 Pup
Further to AAVSO Special Notices #81 and #82, Nikolai Samus, Institute of Astronomy, Russian Academy of Sciences, announced (IAU Circular No. 8898, D. W. E. Green, ed.) that the bright x-ray transient and apparent nova has been assigned the name V598 Puppis [07:05:42.7 -38:14:42 (equinox 2000.0)].
July 31, 1974
THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
187 Concord Avenue, Cambridge, MA 02138 USA
Tel. 617-354-0484
AAVSO ALERT NOTICES
URGENT SPECIAL REQUEST
April 21, 2016: The Mira variable QX Pup (12.4-12.8 I - 14.5-14.7 I) is approaching maximum and was magnitude 13.038 I +/-0.026 on April 16.9723 UT (HMB, J. Hambsch, Mol Belgium). This star is the target of an observing exercise initiated by Arne Henden in 2008 to determine fundamental information on it (http://www.aavso.org/qx-pup).
December 1, 2015
The long period variable R Aquarii is an extremely interesting system. Its type is both Mira (M) and symbiotic (ZAND) - R Aqr is a close binary system consisting of a hot star and a late-type star, both enveloped in nebulosity. In the case of R Aqr, the late-type star is a Mira. As a result, the very interesting light curve shows not only the Mira pulsation but also eclipses as the two stars interact.
By Dr. Kristine Larsen, Central Connecticut State University
Bulletin 73 for 2010
