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The February 2013 Solar Bulletin is now available.

The Manual for Visual Observing of Variable Stars (in English) has just been updated. To download this new and improved version, please visit http://www.aavso.org/visual-observing-manual.

Many thanks to Mike Simonsen, Elizabeth Waagen and Matthew Templeton for their input and helpful suggestions.

Sara Beck
AAVSO Technical Staff, Science Team

March 8, 2013:  Dr. Boris Gaensicke (Warwick University) has requested observations of the currently-outbursting SU UMa-type cataclysmic variable MR UMa in preparation for and support of HST observations scheduled for the week 2013 April 4-7.

March 6, 2013: Further to AAVSO Alert Notice 471 (http://www.aavso.org/aavso-alert-notice-471) and AAVSO Special Notice #339 (http://www.aavso.org/aavso-special-notice-339), HST/COS is scheduled to observe two of the dwarf novae in the CV campaign back-to-back:

on 2013 March 8:
SDSS J103533.03+055158.4  2013 March 8 07:42:37 through 15:04:27 UT
(V=18.8 at minimum, has eclipses)

February 28, 2013:  Further to AAVSO Alert Notice 471 (http://www.aavso.org/aavso-alert-notice-471) and AAVSO Special Notice #338 (http://www.aavso.org/aavso-special-notice-338), HST/COS is scheduled to observe V406 Vir (SDSS J123813.73-033932.9) tomorrow:

           V406 Vir 2013 March 1 08:37:30 through 14:04:33 UT

AAVSO Bulletin 76 - Predicted Dates of Maxima and Minima of Long Period Variables for 2013 - has been published and is available from the AAVSO Bulletin page.

AAVSO Bulletin 76 gives predicted dates for 381 Mira and semiregular variables for the period January 2013 through February 2014. These dates are based on observations in the AAVSO International Database.

The Astronomical Society of the Pacific (ASP) will hold its 125th Annual Meeting on "Ensuring STEM Literacy" in San Jose, CA from July 20 to July 24, 2013.  Early bird registration has begun and abstracts are currently being accepted.  Please visit the ASP meeting page for more information.

The American Association of Variable Star Observers (AAVSO) invites the participation of professional astronomers in our "Professional Astronomer Survey of 2013."

February 21, 2013: Further to AAVSO Alert Notice 471 (http://www.aavso.org/aavso-alert-notice-471) and AAVSO Special Notice #336 (http://www.aavso.org/aavso-special-notice-336), HST/COS is scheduled to observe HM Leo tomorrow:

    HM Leo  2013 February 22 07:17:20 through 14:22:37 UT
 

The January 2013 Solar Bulletin is now available.