New eJAAVSO preprint: Periodicity Analysis of the Semiregular Variable Star EV Aquarii, by E. Terziev, J. R. Percy, A. A. Henden
ej152: Periodicity Analysis of the Semiregular Variable Star
EV Aquarii
front page news
All nodes that have this tag will posted to the home page "Recent Activity" block
Special Notice #262: Long-term monitoring of AGN targets extended
November 2, 2011: The observing campaign described in AAVSO Alert Notice 443 (M. Templeton) has been extended through the end of November 2011. One of the original targets, NGC 6814, has been removed from the target list for the remainder of the campaign.
Modern observations of Hubble's first-discovered Cepheid in M31
The paper "Modern observations of Hubble's first-discovered Cepheid in M31" has been accepted for publication to PASP, and is now available on arXiv.org.
AAVSO Newsletter 50 now online
AAVSO Newsletter 50, October 2011, is now online.
Alert Notice 450: Request for observations of SDSS J080434.20+510349.2 in support of HST observations
October 25, 2011: Dr. Paula Szkody (University of Washington) has requested the help of AAVSO observers in monitoring the WZ Sge-type cataclysmic variable SDSS J080434.20+510349.2 (SDSS0804+51) in support of Hubble Space Telescope ultraviolet spectroscopic observations scheduled for 20:52:40 - 23:32:35 2011 November 3 UT (the night of Wednesday, November 2/3) (JD 2455869.36991-.48096). Nightly observations are requested beginning immediately and continuing through November 30.
Alert Notice 449: Outburst of the UGWZ Candidate BW Scl
October 25, 2011
Event: Outburst of the UGWZ Candidate BW Scl
Special Notice #261: Outburst of the UGWZ Candidate BW Scl
October 21, 2011: The short period cataclysmic variable BW Scl appears to be in outburst. The object was detected in outburst at m(vis)=9.6 by M. Linnolt on 2011 October 21.3146 (JD 2455855.8146), and confirmed by A. Plummer at m(vis)=9.4 on October 21.3424. Observations of this object are encouraged. The object has conflicting classifications in astronomical literature, but is probably a WZ Sge-type dwarf nova rather than a novalike variable.
BW Scl is located at the following (J2000) coordinates:
AAVSO 100th Anniversary Commemorative Posters
By popular demand! A set of twenty pdf commemorative posters exhibited at AAVSO Headquarters is available for downloading.
The posters show portraits of the AAVSO's Directors, Presidents, Secretaries, Treasurers, Council members, and Staff from 1911 to 2011, the top Visual, CCD, PEP, and Photographic/Photovisual observers, and Professional Astronomers in Service to the AAVSO.
Click on the links below to download each poster.
