Skip to main content

News and Announcements

New Site: List of AAVSO Users July 26, 2010 - 4:14pm

Over the next few months we will post a number of quick tips pointing out some new features/changes with the new web site. 

The first tip is about seeing who your fellow users are. Clicking on the URL below will give you a list of all registered users on the site:

http://www.aavso.org/allusers

New Web Site Update! July 26, 2010 - 12:34am

100726 Update: Arne has posted an update to the migration to the AAVSO Discussion Group. We will continue to update the known bug list over the next few days. Please continue to send in comments and bugs. And don't forget to join us in the chat room on Monday.

AAVSO Alert Notice 422 July 16, 2010 - 5:20pm

Observing Campaign on Hubble's First Variable in M31: M31_V1

July 16, 2010: An observing campaign is being carried out on M31_V1,
the first variable star discovered in M31 by Edwin Hubble. The Hubble
Heritage Team, with Dr. Keith Noll, Space Telescope Science
Institute (STScI), as Principal Investigator, plans to observe
M31_V1 with the Hubble Space Telescope (HST), and needs to know

Citizen Sky Planetarium Show w/Timothy Ferris July 16, 2010 - 1:03am

 Our Citizen Sky project has released a nice 7-minute planetarium trailer about Algol, eclipsing binary stars, epsilon Aurigae and more. It is narrated by Timothy Ferris and available on YouTube and also in hi-def and full-dome formats. 07/16/10

AAVSO Newsletter #45 July 15, 2010 - 1:13am

AAVSO Newsletter #45 has been posted. Check out articles about astronauts, challenges for visual observers, new articles for Eyepiece Views, reports from Galway astrofest and observing in Scotland, and much more.

Astro Data Mining Blog July 13, 2010 - 12:57pm

Dr. John Rachlin has launched a new blog highlighting resources useful for those interested in data mining astronomical databases. From his blog:

JAAVSO Preprint May 9, 2010 - 11:22am

Two New Variable Stars in the Fields of Nova Cygni 2006 and Nova Cygni 2007

pdf    ps

David Boyd
5 Silver Lane, West Challow, Wantage, OX12 9TX, UK

Received January 20, 2010; revised March 16, 2010; accepted March 25, 2010

Optical transient in Pegasus May 9, 2010 - 11:17am

Possible Nova in Scorpius - N Sco 2010 No. 2 May 9, 2010 - 11:16am

Central Bureau for Astronomical Telegrams CBET 2262 (Daniel W. E. Green, ed.) announces the discovery by Koichi Nishiyama, Kurume, Fukuoka-ken, Japan; and Fujio Kabashima, Miyaki-cho, Saga-ken, Japan, of a possible nova in Scorpius at magnitude 8.6 on two 40-s unfiltered CCD frames (limiting magnitude 13.1) taken around April 25.788 UT. They confirmed the new object on unfiltered CCD frames (limiting magnitude 17.3) taken around April 25.796 from which they measured the following precise position: R.A. = 16:55:13.16, Decl. = -38:03:46.9 (equinox 2000.0)

Request for photometry of the dwarf nova SS Cygni May 9, 2010 - 11:12am

Further to AAVSO Special Notice 204 (2010 April 15), we are requesting additional observations of the bright dwarf nova SS Cygni currently in outburst. SS Cyg is currently beginning a dwarf nova outburst, and observations of this star made with the EVLA have detected the source at radio wavelengths. Observations of SS Cyg have been scheduled with the VLBA on 2010 April 22 and April 23. Continued optical monitoring of SS Cyg through the end of the current outburst is strongly encouraged, with intensive coverage requested during the VLBA observations.

Rapid fading in the luminous blue variable S Doradus May 9, 2010 - 11:02am

Request for monitoring of SS Cygni in support of EVLA/VLBA radio observations May 9, 2010 - 10:56am

Dr. James Miller-Jones (NRAO, Charlottesville) requests the assistance of AAVSO observers to provide rapid notification of the next outburst of the dwarf nova SS Cygni. A confirmed detection of an outburst will be used to trigger-radio wavelength observations of SS Cygni using the NRAO's EVLA and VLBA radio telescopes. Radio observations will be used to study jet formation in dwarf novae, and rapid notification of the onset of outburst is needed. This project follows in the footsteps of a previous campaign by Dr. Elmar Koerding to examine the same phenomenon.

AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484