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.
New outbursts and unusual activity reported in the last 5 days
YYYYMMDD
20260713
V516 Cyg
V1504 Cyg
V426 Oph
20260712
EM Cyg
AY Lyr
20260711
GK Per
NSV 11599
# indicates a noteworthy or unusual activity
: indicates confirmation required
* indicates time-resolved photometry required
Possible new UGWZ star TCP J02191736+2857158 in Tri.
July 12, 2026
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Nova Aql 2026
Spectroscopy and photometry of AT 2026rdg, a highly reddened FeII-type nova.
July 02, 2026
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AAVSO Alert Notice - Observing Campaign #929
Request for frequent monitoring of RU Peg
May 21, 2026
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AAVSO Alert Notice - Observing Campaign #926
Monitoring Cataclysmic Variables: Hunting for Low States
May 13, 2026
For new papers on CVs see arxiv.org astro-ph
Updated July 11, 2026
Cataclysmic Variables Photometric Periods from TESS
S. O. Kepler, Alejandra Daniela Romero, Larissa Luciano Amorim, Marcos Perez Diaz
The Recurrent Nova TCrB: A Method for Predicting the Next Eruptive Event in Nova Cycles.
Stefano Sello
Long-term Orbital Period Variations of the Eclipsing Dwarf Nova HT Cas
Aykut Ozdonmez, Huseyin Er, Ilham Nasiroglu, M. Emir Kenger, Murat Tekkesinoglu, Ergun Ege, Burak Batuhan Gürbulak, Ali Takey, Nazlı Karaman, M. Abdelkareem
Pre-nova Observations of T CrB: A view from the CHARA Array
Ryan Norris, Narsireddy Anugu, Thomas Gaudin, Magdalena Otulakowska-Hypka, Fabian Kaczmarek, Cameron Caruso, Cody Gustafson, Andrew Kotowski, Rebecca Proni, Nirupam Roy, Fabien Baron, Dipankar P.K Banerjee, Dana K. Baylis-Aguirre, Michelle J. Creech-Eakman, Justin Linford, Alexandre Gallenne, Joanna Mikołajewska, John D. Monnier, Denis Mourard, Ulisse Munari, Nicolas Nardetto, Rachael M. Roettenbacher, Jennifer L Sokoloski, Montana Williams, C. E. Woodward, Stefan Kraus, Jean-Baptiste Le Bouquin, Sorabh Chhabra, Isabelle Codron, Jacob Ennis, Tyler Gardner, Mayra Gutierrez, Noura Ibrahim, Cyprien Lanthermann, Benjamin R. Setterholm, Christopher D. Farrington, Olli Majoinen, Norm Vargas, Douglas R. Gies, Gail H. Schaefer, Theo ten Brummelaar
Balmer decrements as a new diagnostic for period-bounce
Santiago Hernández-Díaz, Beate Stelzer and Daniela Muñoz-Giraldo
Disk instability model incorporating a variable inner disk radius in SS Cyg and U Gem
Mariko Kimura, Osaki Yoji
Detection of a molecular hydrogen envelope around nova GK Persei
D.P.K. Banerjee, A. Evans, T. Liimets, C.E. Woodward, T.R. Geballe, V. Joshi, S. Starrfield
Accreting White Dwarfs: An Unreview
Simone Scaringi, Christian Knigge and Domitilla de Martino
The accretion discs in WZ Sge-type stars in deep quiescence. How do they outburst?
Vitaly Neustroev, Paula Kvist, Miikka Siitonen, Veera Vuolteenaho
V515 And: An Intermediate Polar in the Period Gap Exhibiting Outbursts
Srinivas M Rao, Jeewan C Pandey, Nikita Rawat, Simone Scaringi, Arti Joshi, David A. H. Buckley, Ajay Kumar Singh
Bradley E. Schaefer
Superhumps in active dwarf novae. Part I: ER Ursae Majoris
K. Bakowska, B. Kirpluk, P. Zielinski, M. Motylinski, A. Gurgul, J. Golonka, K. Szyszka
Luis E. Salazar Manzano, Liliana E. Rivera Sandoval, Jean-Marie Hameury, Craig O. Heinke, Iwona Kotko, Thomas J. Maccarone, Manuel Pichardo Marcano
CV artwork courtesy Darren Baskill