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
20260526
V503 Cyg
20260525
X Leo
RX J1831.7+6511
20260524
HW Boo
DI UMa
20260523
AB Dra
AY Lyr
NY Ser
MASTER OT J142023.47-485540.0
20260522
YZ Cnc
AY Lyr
# indicates a noteworthy or unusual activity
: indicates confirmation required
* indicates time-resolved photometry required
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
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2026 outburst of TCP J05454551+5954307 = ASASSN-22dq (UGWZ)
VSNET-ALERT 28166 (Kirill Sokolovsky)
May 13, 2026
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For new papers on CVs see arxiv.org astro-ph
Updated April 15, 2026
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