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T CrB currently bright

Is a nova eruption imminent?

1700 day AAVSO light curve

Although some observers are getting excited about the recent bright state of T CrB, this is actually well explained in Munari et al. 2016, New Astronomy 47, 7.

So, is T CrB ready to erupt again soon? Probably not, according to Munari et al. 

The last paragraph of the paper says, "There is an intriguing parallelism between SACT-2015 and what Hachenberg & Wellmann (1939) observed in 1938. The super-active state they caught occurred ∼70 years past the 1866 nova outburst, and SACT-2015 is occurring ∼70 years past the 1946 nova outburst. Is therefore everything in place for a new nova outburst in 2026, again ∼80 years past the last eruption?"

We may be getting closer to the next big event, and due to the unpredictable nature of recurrent novae T CrB certainly deserves vigilant monitoring in the coming years.

It’s all about the  standstills, those episodes where the star gets stuck at a mid-point between maximum and minimum. If it doesn’t exhibit standstills it isn’t a Z Cam star.

AM Her stars in need of further investigation

Data from Catalina Real Time Survey 
Drake et al. 2009, ApJ, 696, 87

Northern CVs brighter than 17th magnitude here.

Southern CV's brighter than 17th magnitude here.


New outbursts and unusual activity reported in the last 72 hours

Last updated 13:33 UT May 28, 2016


AG Aps
V436 Car
V485 Cen
AG Hya
VW Hyi
AY Lyr
GX Pav
BX Pup
CL Pup
RX Vol
SSS 111226094327-272039

YZ Cnc
DO Dra (Active. IP. Short duration outbursts)

# indicates a noteworthy or unusual outburst
'Activity At A Glance' is gleaned from observations reported to AAVSO MyNewsFlash, BAAVSS-Alert, CVnet-Outburst, VSObs-share and VSNET-outburst. We sincerely thank all the observers who contribute timely observations and reports of activity to these email lists.


For new papers on CV's see astro-ph

Authors: Keisuke Isogai, Taichi Kato, Tomohito Ohshima, Kiyoshi Kasai, Arto Oksanen, Kazunari Masumoto, Daiki Fukushima, Kazuki Maeda, Miho Kawabata, Risa Matsuda, Naoto Kojiguchi, Yuki Sugiura, Nao Takeda, Katsura Matsumoto, Hiroshi Itoh, Elena P. Pavlenko, Kirill Antonyuk, Oksana Antonyuk, Nikolai Pit, Aleksei Sosnovskij, Alex Baklanov, Julia Babina, Aleksandr Sklyanov, Seiichiro Kiyota, Franz-josef Hambsch, Colin Littlefield, Yutaka Maeda, Lewis M. Cook, Gianluca Masi, Pavol A. Dubovsky, Rudolf Novak, Shawn Dvorak, Akira Imada, Daisaku Nogami

Authors: S. Starrfield, C. Iliadis, W. R. Hix

Authors: Steve B. Howell, Mark E. Everett, Sally A. Seebode, Paula Szkody, Martin Still, Matt Wood, Gavin Ramsay, John Cannizzo, Alan Smale

Authors: S. Shugarov, P. Golysheva, K. Sokolovsky, D. Chochol

Authors: Magdalena Otulakowska-Hypka, Arkadiusz Olech and Joseph Patterson

Authors: C.A. Hill, C.A. Watson, D. Steeghs, V.S. Dhillon, T. Shahbaz

Authors: Ashley Pagnotta, David Zurek

Authors: E. Mason, S.B. Howell

Authors: Joseph Patterson (1), Arto Oksanen (2), Jonathan Kemp (3), Berto Monard (2), Robert Rea (2), Franz-Josef Hambsch (2), Jennie McCormick (2), Peter Nelson (2), William Allen (2), Thomas Krajci (2), Simon Lowther (2), Shawn Dvorak (2), Jordan Borgman (1), Thomas Richards (2), Gordon Myers (2), Caisey Harlingten (4), Greg Bolt (2) ((1) Columbia Univ., (2) Center for Backyard Astrophysics, (3) Middlebury Coll., (4) Harlingten Obs.)