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Special Notice #391: Targets Remaining in Northern Dwarf Novae Campaign

December 2, 2014: AAVSO Alert Notice 505 (http://www.aavso.org/aavso-alert-notice-505) announced the campaign on several northern dwarf novae by Deanne Coppejans and colleagues. This campaign, searching for radio jets in dwarf novae, has been moving very quickly! Thanks to your observations and timely notifications, three of the five sets of VLA observations available for the targets have been used on Z Cam, RX And, and YZ Cnc. The PI is extremely appreciative and thanks you all for your excellent work.

BAAVSS data now available through the AAVSO

The American Association of Variable Star Observers (AAVSO) and the British Astronomical Association Variable Star Section (BAAVSS) are pleased to announce that the variable star observation archive of the BAAVSS is now available through the website of the AAVSO.  The BAAVSS archives comprise over 2.5 million variable star observations made mostly by amateur astronomers world-wide over the past 150 years.  These data now join the archives of the AAVSO in the AAVSO International Database, which consists of over 25 million variable star observations made by observe

New eJAAVSO preprint: Recent minima of 161 EB stars

ejaavso291

Recent Minima of 161 Eclipsing Binary Stars

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Gerard Samolyk

P.O. Box 20677, Greenfield, WI 53220

Received November 1, 2014; accepted November 1, 2014

Abstract

New eJAAVSO preprint: Observations of novae from ROAD

ejaavso290

Observations of Novae From ROAD

   pdf

Franz-Josef Hambsch

Oude Bleken 12, B- 2400 Mol, Belgium

Presented at the 103rd Spring Meeting of the AAVSO, Big Bear Lake, CA,
June 13, 2014

Received August 11, 2014; revised September 9, 2014; accepted September 10, 2014

Abstract

New eJAAVSO preprint: Pulsating star period-amplitude relation

ejaavso289

eJAAVSO

Does the Period of a Pulsating Star Depend on its Amplitude?

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John R. Percy
Jeong Yeon Yook

Department of Astronomy and Astrophysics, University of Toronto, Toronto, ON M5S 3H4, Canada

Received July 8, 2014; revised October 10, 2014; accepted October 10, 2014

New eJAAVSO preprint: V1073 Herculis and the Possible Detection of a Dwarf Companion

ejaavso288

First Photometric Study of the Short Period Solar Type Binary V1073 Herculis and the Possible Detection of a Dwarf Companion

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Ronald G. Samec
Faculty Research Associate, Pisgah Astronomical Research Institute, One Pari Drive, Rosman, NC 28772

Solar Bulletin - Volume 70, Number 10

The October 2014 Solar Bulletin is now available.
 
Please visit the Solar Bulletin web page to download your copy: 

​http://www.aavso.org/solar-bulletin

 

Three new eJAAVSO preprints

ejaavso287

Long-term Secular Changes in the Period of Mira Stars

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Thomas Karlsson

Almers väg 19, 432 51 Varberg, Sweden

Received June 3, 2014; revised October 8, 2014; accepted October 24, 2014

Abstract

New eJAAVSO preprint: observing zeta Aur binary stars

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eJAAVSO

The Challenge of Observing the zeta Aurigae Binary Stars

   pdf

Frank J. Melillo

Holtsville Observatory, 14 Glen-Hollow Dr, E-16, Holtsville, NY 11742

Received March 31, 2014; revised May 12, 2014 and June 12, 2014; accepted June 12, 2014

Abstract

Special Notice #390: New possible WZ Sge variable ASASSN-14jv

November 10, 2014: Astronomer's Telegram (ATel) #6676 (B.J. Shappee et al. 2014) notes the discovery of ASASSN-14jv, a bright optical transient found at V=11.3 on 2014 November 9.19 (JD 2456970.69). This object is suspected to be a cataclysmic variable of the WZ Sge subtype. Shappee et al. note that the source is less than one arcsecond away from a g=19.1 magnitude source in the Kepler Input Catalog, suggesting a large amplitude typical of UGWZ stars.

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