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
20260107
SV CMi
20260106
YZ Cnc
20260105
HV Vir #
20260104
KU Cas
CN Ori
# indicates a noteworthy or unusual activity
: indicates confirmation required
* indicates time-resolved photometry required
ASASSN-25fj; new SU UMa-type dwarf nova, most likely WZ Sge subtype.
VSNET-ALERT 28138
January 6, 2026
------------------------------------------------
For new papers on CVs see arxiv.org astro-ph
Updated December 30, 2025
Multi-Messenger Predictions for T Coronae Borealis: Probing Particle Acceleration in Novae
Prantik Sarmah, Sovan Chakraborty, Xilu Wang
Izumi Hachisu, Maiko Kato
WZ Sge-type dwarf novae: an extreme laboratory in cataclysmic variables.
Yusuke Tampo
Challenging historical novae: AT Cnc (1645), Te-11 (483), and M22 (BC 48) revisited.
D.L. Neuhäuser, R. Neuhäuser, V. Hambaryan (U Jena), J. Chapman (Society for the Study of Early China), M. Della Valle (INAF Napoli)
Outbursts in ultra-compact AM CVn binaries
Gavin Ramsay
A study of transients from ground-based surveys reveals new
Jan Kára, Liliana Rivera Sandoval, Wendy Mendoza, Thomas J. Maccarone, Manuel Pichardo Marcano, Luis E. Salazar Manzano, Ryan J. Oelkers, and Jan van Roestel
TESS and ground-based observations of WZ Sge-type dwarf novae in outburst
Y. Tampo, N. Kojiguchi, K. Isogai, D. Nogami, H. Itoh, F.-J. Hambsch, K. Matsumoto, R. Matsumura, D. Fujii, T. Tordai, Y. Sano, B. Monard, P.A. Dubovsky, T. Medulka, D.A.H. Buckley, N. Rawat, S.B. Potter, A. van Dyk, P.J. Groot, P. Woudt, S. Kiyota, G. Bolt, T. Vanmunster, J. Pietz, P. Starr, S.Y. Shugarov, K. Kasai, K. Menzies, S.M. Brincat, E.P. Pavlenko, A. Baklanov, J. Ito, T. Kato
A Bow-Shock Nebula Around the Z Camelopardalis-type Cataclysmic Variable FY Vulpeculae
Howard E. Bond, Calvin Carter, Eric Coles, Peter Goodhew, Jonathan Talbot, Gregory R. Zeimann
The Silent Majority: The Interacting Post-Common-Envelope Binaries Underlying Cataclysmic Variables
Yarin Meir Shani, Na'ama Hallakoun, Sagi Ben-Ami, Sahar Shahaf, Jiadong Li, Hans-Walter Rix, Silvia Toonen
The orbital period changes for novae
Wenshi Tang, Xiangdong Li, Bo Wang
GOTO065054+593624: a 8.5 mag amplitude dwarf nova identified in real time via Kilonova Seekers
T. L. Killestein, G. Ramsay, M. Kennedy, L. Kelsey, D. Steeghs, S. Littlefair, B. Godson, J. Lyman, M. Pursiainen, B. Warwick, C. Krawczyk, L. K. Nuttall, E. Wickens, S. D. Alexandrov, C. M. da Silva, R. Leadbeater, K. Ackley, M. J. Dyer, F. Jiménez-Ibarra, K. Ulaczyk, D. K. Galloway, V. S. Dhillon, P. O'Brien, K. Noysena, R. Kotak, R. P. Breton, E. Pallé, D. Pollacco, A. Kumar, D. O'Neill, T. Butterley, R. Wilson, S. Mattila, A. Sahu, R. Starling, C. Y. Wang, Q. Liu, A. Li, Z. Dai, H. Feng, W. Yuan, R. Billington, A. G. Bull, S. Gaudenzi, V. Gonano, H. Krawczyk, M. T. Mazzucato, A. Pasqua, J. A. da Silva Campos, M. Torres-Guerrero, N. N. Antonov, S. J. Bean, E.T. Boeneker, S. M. Brincat, G. S. Darlington, F. Dubois, F.-J. Hambsch, D. Messier, A. Oksanen, G. Poyner, F. D. Romanov, I. D. Sharp, T. Tordai, T. Vanmunster, K. Wenzel
Hot donors in cataclysmic variables: The case of EI Psc
J. Kára, S. Zharikov, M. Wolf, N. Vaidman, A. Agishev, S. Khokhlov, C.E. Chavez
A 70 pc-Diameter Nova Super-remnant Surrounding the Recurrent Nova RS Ophiuchi
Michael M. Shara, Kenneth M. Lanzetta, Alexandra Masegian, James T. Garland, Stefan Gromoll, Alexei Kniazev, Lee Townsend, David Zurek, Joanna Mikolajewska, David Valls-Gabaud, Frederick M. Walter, John K. Webb
CV artwork courtesy Darren Baskill