News and Announcements
|18 November||AAVSO HQ Job Position: Astronomer||
AAVSO Astronomer position
|18 November||AAVSO HQ Job Position: Operations Manager||
AAVSO Operations Manager
|18 November||Solar Bulletin - Volume 71, Number 10||
The October Solar Bulletin is now available. Please visit the Solar Bulletin web page to download your copy:
The October SID Data report is available here: www.aavso.org/sid-database
|17 November||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:
|06 November||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.
|04 November||Special Notice 410: Upcoming HST observations of V5668 Sgr||
Note: this text is slightly different than the emailed version. No technical information was changed.
|03 November||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:
|30 October||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.
|30 October||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).
|30 October||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.
|23 October||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.
|20 October||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.
|19 October||Annual Meeting early registration ends Friday October 23!||
The planets are gathering on Friday, October 23rd to remind you that early registration for the AAVSO Annual meeting gathering in November ENDS the same day!
Also, if you are planning to give a talk or present a poster, please send your abstracts by Friday as well.
Everything you need to know about the meeting being held November 12-14 as well as registration and abstract submission forms can be found on this page:
|15 October||Visual Observing Manual in Greek||
Thanks to the hard work of volunteer Stelios Kleidis, the Manual for Visual Observing of Variable Stars is now available in Greek!
You can download individual chapters or the entire Manual here.
If you know of anyone who may benefit from this translation, please spread the word!
|15 October||Solar Bulletin - Volume 71, Number 09||
The September Solar Bulletin is now available. Please visit the Solar Bulletin web page to download your copy:
The September SID Data report is available here: www.aavso.org/sid-database
|14 October||Alert Notice 531: Nova Ophiuchi 2015 Number 2 = TCP J17344775-2409042||
October 14, 2015
Event: Nova Oph 2015 No. 2 = TCP J17344775-2409042
Independent discovery by:
|08 October||Alert Notice 530: Nova Aquilae 2015 = ASASSN 15-qd = PNV J19215012+1509248||
October 8, 2015
Independent discovery by:
|02 October||Special Notice #408: Developing planetary systems dust production study - second segment of observations||
October 2, 2015: Further to AAVSO Alert Notice 511, issued in March 2015, Dr. George Rieke (University of Arizona) and colleagues' campaign to monitor planetary debris disks for variability using the Spitzer Space Telescope continues. AAVSO observations are requested to rule out variability of the stars themselves.
The second segment of observations of the four targets takes place from now into January 2016 according to the schedule below.
|01 October||Alert Notice 529: Observing campaign on 5 variables in Cygnus||
October 1, 2015: Dr. George Wallerstein (University of Washington) has requested AAVSO assistance in monitoring 5 variable stars in Cygnus now through December 2015. He is working to complete the radial velocity curves for these stars, and needs optical light curves for correlation with the spectra he will be obtaining.
|29 September||Alert Notice 528: Nova Sagittarii 2015 Number 3 = PNV J18033275-2816054||
September 29, 2015
Event: Nova Sgr 2015 No. 3 = PNV J18033275-2816054
Independently discovered by:
|14 September||Solar Bulletin - Volume 71, Number 8||
The August Solar Bulletin is now available. Please visit the Solar Bulletin web page to download your copy:
The August SID Data report is available here: www.aavso.org/sid-database
|02 September||Special Notice #407: Blazar S5 1803+78 active||
September 2, 2015: AAVSO observer Adolfo Darriba Martinez y Oscar Ortuño (DAM, Observatorio Las Casqueras, Madrid, Spain) reports that the blazar S5 1803+78 has brightened significantly.
S5 1803+78, which is magnitude 16-17 V at minimum, is currently magnitude 14.237 V (LPAB, P. Lampens-Vancauteren (Ukkel, Belgium).
Previous outbursts are recorded in the AAVSO International Database in November 2007, February 2012, and September 2014.
|24 August||Alert Notice 527: 17 Cataclysmic variables to be observed by William Herschel Telescope||
August 26, 2015: Roque Ruiz-Carmona (Ph.D. candidate, Institute of Mathematics, Astrophysics and Particle Physics, Radboud University Nijmegen, The Netherlands) has requested AAVSO assistance with his campaign to observe (a new set of) 17 cataclysmic variables (CVs) with the William Herschel Telescope (WHT) next week.
|20 August||Alert Notice 526: Monitoring of LS IV -14 116 in support of upcoming satellite observations||
August 20, 2015: Prof. Simon Jeffery (Armagh Observatory; Trinity College Dublin) has requested photometric monitoring of the pulsating helium and zirconium-rich hot subdwarf LS IV -14 116 in support of upcoming HST and VLT/UVES spectroscopy. AAVSO observations will supplement photometry due to be obtained with the SAAO 1.0-m and IAC 0.8-m telescopes from 18 August to 2 September 2015. Photometry is requested beginning immediately through 2 September.
|12 August||Solar Bulletin - Volume 71, Number 07||
The July Solar Bulletin is now available. Please visit the Solar Bulletin web page to download your copy: http://www.aavso.org/solar-bulletin
The July SID Data report is available here: www.aavso.org/sid-database