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News and Announcements

14 September Special Notice 255: Cataclysmic Variable in Draco = PNV J18422792+4837425

September 14, 2011: IAU CBAT Central Bureau Electronic Telegram 2818 (Daniel W. E. Green, ed.) announces the discovery by Hideo Nishimura, Miyawaki, Kakegawa, Shizuoka-ken, Japan, of a cataclysmic variable in Draco on 2011 Sept. 5.529 UT at magnitude 11.8 (reported by S. Nakano, Sumoto, Japan). The variable was designated PNV J18422792+4837425 when posted on the Central Bureau's TOCP webpage.

14 September Three new eJAAVSO preprints

ej148: "Deep Infrared ZAMS FIts to Benchmark Open Clusters Hosting delta Scuti Stars" by D. J. Majaess, D. G. TUrner, D. J. Lane, T. Krajci

ej149: "Delta Scuti Behavior Detected in HD 349422" by G. Turner, R. Kaitchuck

ej150: "A Search for Eclipsing Binary Light Curve Variations Among MACHO Project Light Curves of 3,256 Fundamental-Mode RR Lyrae Variables in the Galactic Bulge" by M. W. Richmond

14 September Supernova Photometry Chat with Dr. Michael Richmond

On 13 September, 2011, we had the good fortune to have Dr. Michael Richmond, Physics Professor and Observatory Director for the Rochester Institute of Technology in New York chat with us about SN 2011fe and supernova photometry in general. Here is the transcript from that chat session.

12 September Alert Notice 448: Request for observations of V455 AND in support of HST observations

September 12, 2011:

11 September Alert Notice 447: Nova Sco 2011 No. 2 = PNV J16364440-4132340 = PNV J16364300-4132460

September 10, 2011

Event: Nova in Scorpius

Nova Sco 2011 No. 2 = PNV J16364440-4132340 = PNV J16364300-4132460

Discovered Independently by:
 - John Seach (Chatsworth Island, NSW, Australia)
 - Yuji Nakamura (Kameyama, Mie, Japan)
Discovery Date:
 - Seach: 2011 Sep. 06.37 UT (JD 2455810.87)
 - Nakamura: 2011 Sep. 06.4313 (JD 2455810.9313)

10 September Special Notice #254: T Pyx Campaign continues

September 10, 2011:  The outbursting recurrent nova T Pyx is past solar conjunction and is widely observable again. Arto Oksanen in Finland has been following it through July and August and reports it currently at 10th magnitude. Please add T Pyx back to your observing schedule if possible to follow the decline of its outburst.

10 September Special Notice #253: Request for Observations of MAXI J1836-194

September 10, 2011: Dr. Gregory Sivakoff (U. of Alberta) requests observations of the X-ray binary star MAXI J1836-194 as part of the JACPOT collaboration studying stellar radio jets from compact binaries.  There is no predetermined duration for this campaign, but observations are requested now to coincide with ongoing X-ray and radio observations.

09 September Supernova Chat 13 Sept at 4:00PM ET

Supernova 2011fe has been gaining a lot of interest, and not just among astronomers, either! News of SN 2011fe made "The News Hour" for instance.

08 September Special Notice #252: Upcoming Eclipse of Zeta Aurigae

September 8, 2011:

Jeff Hopkins (Hopkins Phoenix Observatory, Phoenix, AZ) communicates regarding the upcoming eclipse of the 4th-magnitude binary system zeta Aurigae. He writes:

06 September Supernova 2011fe: La supernova más brillante de los últimos 20 años

This is also available in English

06 September Special Notice #251: Possible transient in Scorpius
September 6, 2011: John Seach (Chatsworth Island, NSW, Australia) reports the detection of a transient object in Scorpius, having a magnitude of 9.8 on 2011 September 6.37 UT (JD 2455810.87).  Observations were made with a DSLR and 50mm f/1.2 lens and 5 second exposure, with limiting magnitude 10.5.  The object is visible on four separate frames taken after the discovery was made.          
05 September New Supernovae Photometry Discussion Forum

02 September Supernova 2011fe: The brightest supernova in the last 20 years

También disponible en español

02 September AAVSO Receives National Science Foundation Award

The AAVSO has been awarded a new grant from the National Science Foundation. This one is for 3 years and ~$660,000. As with Citizen Sky, it is from their Informal Science Education program. It is titled "Two Eyes, 3D: Studying Stereoscopic Representations in Informal Settings". Aaron Price is the PI with Co-PIs from Tufts University (Dr.

01 September Visual Observing Manual - Portuguese Version

Thanks to the hard work and perseverance of David Duarte and his colleagues at the Centro de Estudos Astronômico de Alagoas (CEAAL), there is now a version of the AAVSO Manual for Visual Observing of Variable Stars available for download here:

We hope that this manual will be helpful to all of our many Portuguese-speaking observers and that you will feel free to share it with others.

30 August New eJAAVSO preprint: "Secular Variation of the Mode Amplitude-Ratio of the Double-Mode RR Lyrae Star NSVS 5222076, Part II, by D. Hurdis and T. Krajci

"Secular Variation of the Mode Amplitude-Ratio of the Double=Mode RR Lyrae Star NSVS 5222076, Part II, by D. Hurdis and T. Krajci

25 August Alert Notice 446: Supernova 2011‭fe ‬in M101‭ (‬NGC 5457‭) = ‬PSN J14030581+5416254

August 26‭, ‬2011

Discovered by‭:  ‬The Type Ia supernova science working group of the‭ ‬ Palomar Transient Factory‭:  ‬Peter Nugent‭, ‬Lawrence Berkeley National‭ ‬Laboratory‭ (‬LBL‭), ‬University of California at Berkeley‭; ‬Mark‭ ‬Sullivan‭, ‬Oxford University‭; ‬David Bersier‭, ‬Liverpool John Moores‭ ‬University‭ (‬LJMU‭); ‬D‭. ‬A‭. ‬Howell‭, ‬Las Cumbres Observatory Global‭ ‬Telescope Network Inc‭., ‬University of California at Santa Barbara‭; ‬Rollin Thomas‭, ‬LBL‭; ‬Phil James‭, ‬LJMU

24 August Special Notice #250: Possible Type-Ia Supernova in M101

P. Nugent et al. report in ATel #3581 that a possible Type-Ia supernova has been discovered by the Palomar Transient Factory shortly after eruption in the galaxy M101 and has been designated "PTF11kly".  The object is currently at a magnitude of g=17.2, but may well rise by several magnitudes. The object is well placed within M101 for good photometry, and observations of this potential bright SNIa are strongly encouraged.

The (J2000) coordinates reported for the object are

    RA: 14:03:05.81 , Dec: +54:16:25.4

24 August 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, and makes use of observations old and new. 

23 August 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

19 August 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.

19 August Alert Notice 445 - Request for monitoring of SS Cygni in support of European VLBI radio observations

August 19, 2011: Following their very successful multiwavelength observing campaign on the dwarf nova SS Cygni in 2010 April (see AAVSO Special Notices #204 and 206 and the related information page), Dr. James Miller-Jones (International Centre for Radio Astronomy Research, Curtin University, Perth, Western Australia) and colleagues have a follow-up multiwavelength campaign on SS Cyg scheduled.

17 August 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.

11 August Special Notice #248: Radio outburst in V1343 Aquilae

Radio outburst in V1343 Aquilae
August 11, 2011

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

10 August JAAVSO Call for Papers for Special epsilon Aurigae Issue


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.

AAVSO 49 Bay State Rd. Cambridge, MA 02138 617-354-0484