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NSV 11154: A newly classified R CrB star

A paper by Nutsinee Kijbunchoo (LSU) and others on the star NSV 11154 has just been accepted for publication in the Publications of the Astronomical Society of the Pacific.  This paper "NSV 11154 is a New R Coronae Borealis Star" is now available on arXiv.org, and makes use of observations old and new. 

Nuevo foro de AAVSO en idioma español

A partir de hoy, la AAVSO inaugura un espacio de intercambio para la comunidad hispanoparlante
donde intercambiar experiencias, preguntas, comentarios, información, observaciones y todo lo que tenga que ver con el estudio de las estrellas variables.

Foro de discusión de AAVSO en Español

Special Notice #249: FTP site for submitting AGN images requested in Alert Notice 443

August 19, 2011: As announced in AAVSO Alert Notice 443, Dr. Misty Bentz (Georgia State University) requests observations of four active galactic nuclei (AGN) for a study of variability in these sources by the STARE Collaboration. She requests BVRcIc filtered photometry of NGC 6814, NGC 7213, NGC 7469, and NGC 1566 from July 10, 2011, to November 1, 2011. She also requests that observers submit their images for analysis. An FTP site has been created for this purpose.

Buy the AAVSO Centennial History book directly from the AAVSO!

The AAVSO has 100 copies of Advancing Variable Star Astronomy that we are selling at the discounted rate of $80. So please order from the AAVSO store and help support the organization. We have the books in stock for immediate shipment.

But wait, there's more! If you add an order for one of our limited edition Centennial T-Shirts, we will take $15 off your total order at checkout.

Special Notice #248: Radio outburst in V1343 Aquilae

Note: This text was updated from the original to include the most recent observation. -M. Templeton, 2011 August 11

August 11, 2011: The star V1343 Aquilae is reportedly undergoing a radio flaring episode, and optical observations over the next few weeks are encouraged to track the optical behavior.  S.A. Trushkin et al report in ATel #3547 that observations with the RATAN-600 show a large increase in radio fluxes at 4.8, 8.5 and 11.2 GHz beginning around JD 2455777 (2011 August 03) and continuing through the present.

JAAVSO Call for Papers for Special epsilon Aurigae Issue

CALL FOR PAPERS

for a special edition of the

Journal of the American Association of Variable Star Observers

dedicated to epsilon Aurigae, similar objects and amateur observing techniques of bright stars.

Alert Notice 444: Nova Lupi 2011 [PR Lup]

August 9, 2011

Event: Nova in Lupus  -  Nova Lupi 2011   =  PNV J14542000-5505030  [PR Lup]

Discovered by: Nicholas Brown, Quinns Rocks, Western Australia  [vsnet-alert 13560]

Discovery Date: 2011 August 4.73 UT

Discovery Magnitude: magnitude 10.2 photographic unfiltered, on two films, using a 135F2 cannon lens and tmax 400 film

Special Notice #247: Possible Nova in Lupus

Possible Nova in Lupus
August 7, 2011

Nick Brown in vsnet-alert 13560 posts about a possible new nova from his photographic survey:


"The star appears at mag 10.2 photographic, on 2 films taken on August 4.73UT using a 135F2 cannon lens and tmax 400 film.unfiltered. No object is present on film taken on july 5.85UT down to 11.7pg. No previous variable stars are reported at this near position."

The coordinates are: 14 54 20  -55 05 03  J2000

Special Notice #246: Continued Monitoring of epsilon Aurigae

August 8, 2011: The bright star epsilon Aurigae has emerged from its most recent eclipse that began in August, 2009. A BVRIJH light curve for the last 365 days of the eclipse can be viewed at the following URL.

http://tinyurl.com/epsaur

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