News and Announcements
| 23 January | Charts and Sequences Update January 2015 |
With APASS data release 8 filling in most of the remaining areas of sky with reliable secondary standards, the sequence team has been busy filling the remaining standing requests. This latest batch of new and revised sequences also has many newly discovered CVs from ASASSN, as well as sequences for RCB, NR and ZAND objects in the AID and VSX. You can downoad the list as either an .xlsx or .csv file. |
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| 21 January | AAVSO Newsletter for January 2015 is published |
AAVSO Newsletter 63, January 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. |
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| 20 January | New eJAAVSO preprint: An eclipsing symbiotic nova in outburst? |
ej295 The Curious Case of ASAS J174600-2321.3: an Eclipsing Symbiotic Nova in Outburst? Stefan Hümmerich Sebastián Otero |
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| 19 January | Special Notice #396: Blazar PKS 0716+71 in very bright outburst |
January 19, 2015: The blazar PKS 0716+71 == S5 0716+71 is currently in a very bright active state, at a visual magnitude of 12.1 as observed by G. Poyner on 2015 January 19.212 (JD 2457041.712). The object was first noted in outburst by Arkharov et al. |
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| 19 January | Two new eJAAVSO preprints: Maxima of 67 SPPs; Longterm monitoring of semiregulars |
ej294 Recent Maxima of 67 Short Period Pulsating Stars Gerard Samolyk P.O. Box 20677, Greenfield, WI 53220 Received January 8, 2015; accepted January 8, 2015 Abstract |
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| 16 January | Special Notice #395: Alpha Com campaign cancelled |
January 16, 2015: We have been informed by PI Dr. Matthew Muterspaugh that his campaign on alpha Com (AAVSO Alert Notice 506) has been cancelled. Position measurements published a century ago contained errors that affected the predictions for the time of eclipse. More information will be coming from Dr. Muterspaugh and we will disseminate it to everyone in an Alert Notice, but he asked that the observer community be informed now so that observing efforts might not be wasted. |
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| 14 January | Solar Bulletin - Volume 70, Number 12 |
The December 2014 Solar Bulletin is now available. Please visit the Solar Bulletin web page to download your copy: http://www.aavso.org/solar-bulletin |
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| 14 January | New eJAAVSO preprint: Revised elements of 78 southern EB systems |
ejaavso292 Revised Light Elements of 78 Southern Eclipsing Binary Systems Margaret Streamer, Jeff Byron, David J. W. Moriarty, Tom Richards, Bill Allen, Roy Axelsen, Col Bembrick, Mark Blackford, Terry Bohlsen, David Herald, Roland Idaczyk, Stephen Kerr, Ranald McIntosh, Yenal Ogmen, Jonathan Powles, Peter Starr, George Stockham Abstract |
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| 12 January | Special Notice #394: Observations of b Persei urgently requested |
January 12, 2015: Photometry by P. Benni (AAVSO observer code BPAD; Massachusetts, United States), D. Collins (CDK; North Carolina, United States), F. Campos (CFRA; Catalunya, Spain), and F. Melillo (MFR; New York, United States) suggest that b Persei may have entered eclipse around JD 2457033.6 (2015 January 11.1 UT). Time-series photometric observations of this bright star are urgently requested beginning immediately, and continuing for the next two weeks (through at least 2015 January 26 UT) and possibly beyond. |
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| 07 January | JAAVSO Vol. 42, No. 2, 2014 printed copies available |
Paper copy from createspace.com is available for $12 plus shipping. |
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| 06 January | Alert Notice 507: Observations of the eclipsing binary b Persei |
January 7, 2015: Dr. |
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| 04 January | 2015 CHOICE Course Schedule |
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| 30 December | The last fundraising letter |
Dear AAVSO Supporters,
This is the last fundraising letter you will get from the AAVSO in 2014, I promise.
15 December |
Solar Bulletin - Volume 70, Number 11 |
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The November 2014 Solar Bulletin is now available. Please visit the Solar Bulletin web page to download your copy: http://www.aavso.org/solar-bulletin |
| 11 December | JAAVSO Vol. 42, No. 2, 2014 is published |
Journal of the American Association of Variable Star Observers TABLE OF CONTENTS Does the Period of a Pulsating Star Depend on its Amplitude? |
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| 11 December | Special Notice #393: Correction to Special Notice #392 [ASASSN-14lp] |
December 11, 2014: In AAVSO Special Notice #392, the name of the supernova discovered in NGC 4666 was given as ASASSN-141p. It should have been ASASSN-14lp. That is to say, the text following the dash should Please create charts and submit observations using the name ASASSN-14lp. Sincere apologies for the error! |
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| 11 December | Special Notice #392: ASASSN-14lp = Type Ia Supernova in NGC 4666 (Virgo) |
December 11, 2014: T. W.-S. Holoien et al. announce in The Astronomer's Telegram (ATel) #6795 (http://www.astronomerstelegram.org/?read=6795) the discovery of a transient in NGC 4666 at magnitude 14.3 V on 2014 December 9.61 UT. The discovery was made in the course of the All Sky Automated Survey for SuperNovae (ASASSN) search, and the object assigned the name ASASSN-14lp. ASASSN-14lp was not seen (<15.3 V) in poor-quality ASASSN images obtained on 2104 Dec. 08.35 UT. |
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| 09 December | 2015 JD Calendar |
The 2015 Julian Day calendar is now available for your viewing or downloading pleasure.
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| 03 December | Datos de la BAAVSS ahora disponibles a través de la AAVSO |
La American Association of Variable Star Observers (AAVSO) y la British Astronomical Association Variable Star Section (BAAVSS) tienen el agrado de anunciar que el archivo de observaciones de estrellas variables de la BAAVSS ya está disponible a través del sitio web de AAVSO. Los archivos de la BAAVSS cuentan con más de 2,5 millones de observaciones de estrellas variables realizadas en su mayoría por astrónomos aficionados de todo el mundo durante los pasados 150 años. |
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| 02 December | 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. |
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| 02 December | 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 |
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| 02 December | New eJAAVSO preprint: Recent minima of 161 EB stars |
ejaavso291 Recent Minima of 161 Eclipsing Binary Stars Gerard Samolyk P.O. Box 20677, Greenfield, WI 53220 Received November 1, 2014; accepted November 1, 2014 Abstract |
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| 24 November | New eJAAVSO preprint: Observations of novae from ROAD |
ejaavso290 Observations of Novae From ROAD Franz-Josef Hambsch Oude Bleken 12, B- 2400 Mol, Belgium Presented at the 103rd Spring Meeting of the AAVSO, Big Bear Lake, CA, Received August 11, 2014; revised September 9, 2014; accepted September 10, 2014 Abstract |
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| 24 November | New eJAAVSO preprint: Pulsating star period-amplitude relation |
ejaavso289
Does the Period of a Pulsating Star Depend on its Amplitude? John R. Percy |
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| 21 November | 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 Ronald G. Samec |
