Solar Bulletin - Volume 67, No. 12
The December 2011 Solar Bulletin is now available.
All nodes that have this tag will posted to the home page "Recent Activity" block
The December 2011 Solar Bulletin is now available.
Thanks to the efforts of Cheng Simiao, a young and very enthusiastic observer from Beijing, we now have a new, more up-to-date Chinese version of the "Manual for Visual Observing of Variable Stars" available for download. He wishes that this edition be thought of as a 100th birthday present to the AAVSO as well as an 18th birthday gift to himself.
Congratulations and many thanks to Mr. Cheng!
Some work has been done recently to the AAVSO's Light Curve Generator.
Three additional filters, the Tri-R, Tri-G, and Tri-B filters, primarily used in DSLR work, were added to the data that the Light Curve Generator can now display. This should be of great use to people monitoring bright variable stars with cameras, among others.
By popular demand the "Unknown" filter was put back online. While it still comprises a sizable minority of the data in the AID, it should not be used to enter any observations into the database.
Welcome to the AAVSO Computer History Project
The purpose of this project is to document the history of the Information Technology Infrastructure of the AAVSO, how it came to be, what hardware was used, who were the people involved, and how the technology was used to further the mission of variable star observing and analysis.
We are happy to announce that after a few months of testing, the AAVSO's Data Usage Reports are now available to all observers again. You may subscribe to these weekly reports by visiting this page:
http://www.aavso.org/apps/email/
The 2012 JD Calendar is now available.
Just go to the JD Calendar page and scroll down to the bottom where you will be able to view or download the new calendar.
Happy observing!
The November Solar Bulletin is now available.
December 15, 2011: IAU CBAT Central Bureau Electronic Telegram 2943 (Daniel W. E. Green, Ed.) announces the discovery of an apparent supernova in NGC 4984 by Koichi Itagaki, Yamagata, Japan, at unfiltered CCD magnitude 12.7 on 2011 Dec. 9.856 UT.
Coordinates: R.A. = 13 08 58.39 Decl. = -15 31 04.1 (2000.0)
SN 2011iy is 16.6" east and 6.1" south of the nucleus of NGC 4984.