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Special Notice #417: CH Cygni B and V photometry urgently requested

REQUEST CONTINUED THROUGH 2018

June 3, 2016: Dr. Margarita Karovska (Harvard-Smithosonian Center for Astrophysics) is urgently requesting B and V photometry of the symbiotic variable CH Cyg from now until at least the end of August. Observations made twice a week are sufficient; time series observations are not needed. Spectroscopy would also be very welcome and appreciated.

Solar Bulletin - Volume 72, Number 04

The April Solar Bulletin is now available. Please visit the Solar Bulletin web page to download your copy: https://www.aavso.org/solar-bulletin

Manual for Visual Observing of Variable Stars in Polish

Thanks to a lot of hard work by Ariel Majcher, Bogdan Kubiak, Marcin Biskupski, Michał Kwieciak, and Piotr Guzik, the AAVSO Manual for Visual Observing of Variable Stars (2013 edition) is now available in Polish. You may download this Manual (free-of-charge) from here.

2016 Annual Campaign: Providing Certainty in Uncertain Times

We live in exciting, unpredictable times. The boundaries of our knowledge are expanding at an accelerating rate, just like the universe we live in. It is impossible to know what the world will look like even five years from now.

AAVSO Newsletter 68, April 2016, is published

AAVSO Newsletter 68, April 2016 is now available to members

The AAVSO Newsletter is a periodic, general forum that supports our various observing programs with lists of new targets, observing programming ideas, and general information that spans a wide area of interest. Guest writers contribute pieces that can range from current events to book reviews.

Remote Access Links for the 2016 Spring Meeting

This year's spring meeting will begin on Thursday evening, May 5, at 6pm CDT (23:00 UT), with a keynote address by Dr. Horace Smith, Professor Emeritus of Michigan State University and a noted expert on RR Lyrae stars. Dr.

Solar Bulletin - Volume 72, Number 03

The March Solar Bulletin is now available. Please visit the Solar Bulletin web page to download your copy:

https//www.aavso.org/solar-bulletin

The March SID Data report is available here: https://www.aavso.org/sid-database

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