News and Announcements
|14 June||The Cepheid Variable M31_V1: Hubble's First Cepheid||
|08 June||20% Discount on New Centennial Book (updated)||
July 21 Update: The books are here! The AAVSO has 100 copies of the book that we are selling at the same Cambridge Press discounted rate of $80. So please order from the AAVSO store and help support the organization. We have the books in stock for immediate shipment.
But wait, there's more! If you add an order for one of our limited edition Centennial T-Shirts, we will take $15 off your total order at checkout.
|08 June||JAAVSO vol. 39, nr. 1, is published||
The Journal of the American Association of Variable Star Observers (JAAVSO), Volume 39, Number 1, 2011, is now available for downloading and for hardcopy purchase.
|07 June||AAVSO Eclipsing Binary Ephemeris for 2011 available||
The 2011 AAVSO Eclipsing Binary Ephemeris, prepared by Gerry Samolyk, is now available online at
|07 June||Special Notice #243: Pre-SN 2011dh images of M51 requested||
Pre-SN 2011dh images of M51 requested
|06 June||Margaret Mayall Assistantship Open for Applications for Summer 2011||
(update: this position has been filled.)
|03 June||AAVSO Special Notice #242||
SN 2011dh = Supernova in M51 = PSN J13303600+4706330
|03 June||Alert Notice 442: Nova Scorpii 2011 = PNV J16551100-3838120||
June 3, 2011
|03 June||AAVSO Special Notice #241||
New Supernova in M51
|03 June||Women in the Geosciences: Past, Present, and Future||
The following announcement is made on behalf of long time AAVSO observer/member Dr. Kristine Larsen:
|01 June||April Solar Bulletin|
|01 June||AAVSO Special Notice #240||
Possible Nova in Scorpius
|01 June||AAVSO Annual Report 2009-2010||
The revised AAVSO Annual Report 2009-2010 (with changes to the Headquarters staffing section) is now online:
|01 June||Minor Planet Pebble||
AAVSO member, observer and science educator Dr. Pebble Richwine has had a minor planet named in her honor - 268242 Pebble. Pebble did her PhD in science education at the University of Arizona where her dissertation was on using variable stars in elementary school science education. She's given talks at many AAVSO meetings and is currently a science educator in Georgia.
Here is the official citation:
|01 June||New ejaavso preprint: "Edward A. Halbach 1909—2011" by G. Samolyk||
"Edward A. Halbach 1909—2011" by G. Samolyk
|31 May||Reporting DSLR Data||
Over in the Citizen Sky forums we have begun a discussion about how to properly report DSLR data.
|27 May||Alert Notice 441: Monitoring of Bright Giant Variables requested in support of ground-based spectroscopy and for long-term study||
May 27, 2011: Dr. Steve Howell (NASA) and Dr. Travis Rector (University of Alaska, Anchorage) have requested AAVSO observations of several bright giant variable stars of diverse classes. This request is for immediate support of spectroscopic observations to be made at Kitt Peak National Observatory between 2011 May 30 and 2011 June 01 (JD 2455712 - 714). However, observers are encouraged to continue long-term monitoring of these objects.
|26 May||New ejaavso preprint: "CI Cygni 2010 Outburst and Eclipse: An Amateur Spectroscopic Survey..."||
"CI Cygni 2010 Outburst and Eclipse: An Amateur Spectroscopic Survey—First Results From Low Resolution Spectra" by F. Teyssier
|26 May||David Benn Receives 2011 Director's Award||
It was announced at the AAVSO Banquet, Saturday, May 21, 2011, that the 2011 recipient of the AAVSO Director's Award is David Benn of Klemzig, South Australia.
|26 May||Minor planet 12789 Salvadoraguirre named for AAVSO member!||
Minor planet 12789 Savadoraguirre is named for AAVSO member/observer Salvador Aguirre, M.D. (observer code "ASA"), an avid amateur astronomer from Hermosillo, Mexico. He has conducted many observations of variable stars, asteroid occultations, meteors, and comets. He has also help popularize and coordinate amateur astronomical research within Mexico.
|23 May||Hubble Space Telescope Campaign Results|
|18 May||Charts and Sequences Update May 2011||
|17 May||Alert Notice 440: PEP Observing Campaign on P Cygni||
May 17, 2011: Ernst Pollmann, an active spectroscopist in Germany and leader of Active Spectroscopy in Astronomy, has requested the assistance of AAVSO photoelectric photometry (PEP) observers in a campaign to observe the S Doradus variable P Cygni through the 2011 observing season.
|12 May||AAVSO en Espacio Profundo Radio||
A partir del viernes 13 de mayo, la AAVSO tendrá una sección en el programa Espacio Profundo Radio, que se emite todos los viernes entre las 20 y 21 GMT. El programa es conducido por Cristina Ruffa y auspiciado por Espacio Profundo, una de los sitios web más conocidos en el ámbito latinoamericano.
|09 May||Chat Transcript - History of the AAVSO||
The following is a chat transcript from May 9, 2011. The topic of the chat was the History of the AAVSO and variable star observing with guests Dr. Mike Saladyga and Dr. Tom Williams. Some footnotes are at the bottom.
<DocKQR> Hello Folks!