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Registration Now Open for Remaining 2016 CHOICE Courses

Registration is now open for the remaining CHOICE courses to be offered in 2016. You can sign up by visiting the AAVSO Store.

September 5 - 30
CCD Photometry Part I

Alert Notice 548: AR Sco observing campaign

August 18, 2016: Dr. Thomas Marsh (University of Warwick) and colleagues have requested AAVSO coverage of the intriguing binary AR Sco in support of upcoming Newton-XMM observations.

The XMM observations of AR Sco have been scheduled for:
2016 September 10 15:41 - September 11 02:26 UT

Solar Bulletin - Volume 72, Number 07

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

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

Alert Notice 547: Nova Sgr 2016 No. 2 = ASASSN-16ig = TCP J18010780-2631434

August 11, 2016

Event: Nova in Sagittarius

Discovered by:  
- Koichi Nishiyama (Kurume, Japan) and Fujio Kabashima (Miyaki, Japan) (CBET 4295);
- All Sky Automated Survey for SuperNovae (ASAS-SN) (K. Z. Stanek et al., ATel #9343)

Discovery magnitude:
- Nishiyama and Kabashima - 10.7 unfiltered CCD (2 frames using a 135-mm f/4 camera lens (+FLI 09000 camera))
- ASAS-SN - V~13.3

Alert Notice 546: Campaign on V1687 Cyg (WR 140)

August 3, 2016: Dr. Noel Richardson (University of Toledo) and colleagues have requested AAVSO assistance in optical monitoring of the bright, colliding-winds binary V1687 Cyg (WR 140, HD 193793) as part of their multi-wavelength campaign on this system.

Solar Bulletin - Volume 72, Number 06

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

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

Alert Notice 545: FO Aqr time-series observations requested

July 13, 2016: Dr. Colin Littlefield (University of Notre Dame) and colleagues Drs. Peter Garnavich (Notre Dame), Erin Aadland (Minnesota State), and Mark Kennedy (University College Cork) have requested AAVSO assistance in monitoring the intermediate polar cataclysmic variable FO Aqr beginning immediately.

Dr. Littlefield, who with his colleagues recently published ATel #9216 and #9225, writes:

Thank you - We passed our Annual Campaign goal!

Thanks to all of our generous donors - WE MADE IT!

We not only met our Annual Campaign goal, but exceeded it by more than $1000.00.

THANK YOU to everyone who contributed. 

Your continuing support makes it possible for the AAVSO to continue providing the data, tools and services scientists, educators, students, observers and the public rely on.

 

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