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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

   pdf

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

ejaavso284

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.

The AAVSO Director search results are in!

Hello Members, Observers, Colleagues, and Friends,

As you may know, Dr. Arne A. Henden is retiring as Director of the AAVSO at the end of January 2015 after ten years of devoted service to the Association.

Special Notice #389: Possible Supernova in NGC 4303 (M61) - PSN J12215757+0428185

October 29, 2014: The CBAT Transient Object Confirmation Page (follow-up page = http://www.cbat.eps.harvard.edu/unconf/followups/J12215757+0428185.html) reports the discovery of a possible supernova in M61 (NGC 4303) by Koichi Itagaki (Yamagata, Japan) on 2014 Oct. 29.8376 UT at magnitude 13.6 CCD unfiltered.

Coordinates:  R.A. 12 21 57.57   Dec. +04 28 18.5   (2000.0)

Alert Notice 505: Monitoring of Northern dwarf novae for radio jets campaign

October 24, 2014: Ms. Deanne Coppejans (PhD candidate, Radboud University Nijmegen (Netherlands) and University of Cape Town) and colleagues have requested AAVSO observer assistance in monitoring several dwarf novae in support of their campaign to observe them in outburst with the Very Large Array (VLA) to search for radio jets.

Silicon and Glass

Everyone’s familiar with the term ‘bricks and mortar’. Many donors prefer to give to specific projects or programs that result in well-defined, tangible goods, such as the new wing of a building, a playground, or furniture and athletic equipment for a recreation center.

Special Notice #388: Outburst of VSX J213806.5+261957

October 23, 2014: Carey Chiselbrook (Georgia, United States; AAVSO observer code CCY) observed the WZ Sge-type dwarf nova VSX J213806.5+261957 in outburst at a visual magnitude of 9.7 on 2014 October 22.0590 (JD 2456952.55903). Prior to the outburst detection,  the last observation (also by CCY) indicated the star was not in outburst less than 24 hours prior (mvis < 13.8 at JD 2456951.6326).

Charts and Sequences Update October 22, 2014

The following objects have had new or revised sequences added since the end of May. Please be sure you are using the most up to date charts and sequences if you observe any of these objects.

A complete listing of new and revised sequences for 2014 is available here.

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