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Solar Bulletin - Volume 71, Number 10

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

http://www.aavso.org/solar-bulletin

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

IYL Youth Contest Winners!

WINNER - Video Category:

A Holiday Tour to the Planet Saturn - created by Jashleen Kaur and Low Mun Shuen from Singapore.


WINNER - Essay Category:

Charts and Sequences Update November 2015

The charts and sequences team has been busy over the last several months creating new and updating existing variable star charts and sequences. The following is a list of updates made since 27 June, 2015. If you observe any of these objects please update your charts and photometry tables with the most recent version as soon as possible.

Special Notice 410: Upcoming HST observations of V5668 Sgr

Note: this text is slightly different than the emailed version.  No technical information was changed.

Alert Notice 534: Nova Sgr 2015 No. 4 = PNV J18225925-1914148

November 3, 2015

Event: Nova Sgr 2015 No. 4 = PNV J18225925-1914148

Independent discovery by:  
 - Shigehisa Fujikawa (Kan'onji, Kagawa, Japan, reported via I. Endoh,
National Astronomical Observatory of Japan, Mitaka, Tokyo)
 - Hideo Nishimura (Kakegawa, Shizuoka-ken, Japan, reported via S.
Nakano (Sumoto, Japan))
 - Minoru Yamamoto (Okazaki, Aichi-ken, Japan, reported via S. Nakano)

Special Notice #409: Chandra observations scheduled for RT Cru

October 30, 2015: Further to AAVSO Alert Notice 503, Dr. Margarita Karovska (Harvard-Smithsonian Center for Astrophysics) informs us that the Chandra observations of the symbiotic variable RT Cru have been scheduled.

Alert Notice 533: Coverage of V5668 Sgr (Nova Sgr 2015 No. 2) requested in support of HST spectroscopy

October 30, 2015: Dr. Peter Kuin (Mullard Space Science Laboratory, University College London) and colleagues in the Swift Nova group have requested AAVSO observers' assistance in multicolor monitoring of V5668 Sgr (Nova Sgr 2015 No. 2, see AAVSO Alert Notices 512, 519) in support of an upcoming spectroscopic observation with the Hubble Space Telescope Imaging Spectrograph (STIS).

The AAVSO DSLR Observing Manual in Greek

A Greek translation of The AAVSO DSLR Observing Manual is now available for download.

Many thanks to Mr. Stelios Kleidis for his tremendous volunteer effort in creating this excellent translation.

AAVSO Newsletter 66, October 2015, is published

AAVSO Newsletter 66, October 2015 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.

Alert Notice 532: Observations requested for KIC 8462852

October 20, 2015: The AAVSO requests time-series observations of the enigmatic variable object KIC 8462852 beginning immediately and continuing through at least the end of the current observing season. The star is relatively bright (V=11.88) and shows aperiodic dips of a few tenths of a magnitude, the causes of which are unknown. The object is not known to be a close binary or a young stellar object, and there are no other typical indicators of circumstellar material such as infrared emission.

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