Cataclysmic Variables Network


Last updated 09:46 UT on 09 December 2023

(All objects mentioned in this section are in the International Variable Star Index; additionally, VSX links have been given for selected cataclysmic variables

'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 ema il lists.

New outbursts and unusual activity reported in the last 5 days



GY Cnc


AH Eri

AR Pic

DDE 76



LX And

SS Aur

V516 Cyg

AB Dra

KT Per

FO Per



BB Ari

AF Cam

CZ Ori

CTCV J1940-4724 

NSV 35

# indicates a noteworthy or unusual activity

:  indicates confirmation required
* indicates time-resolved photometry required

CV News

AAVSO Alert Notice 841

VY Scl coverage needed now for HST ToO observations

November 13, 2023

AAVSO Alert Notice 839

BF Eri monitoring requested in support of HST observations this week.

November 4, 2023

AAVSO Alert Notice 838

Monitoring requested for 11 dwarf novae in support of HST observations in 2023-2024

October 26, 2023

ATel 16107

Recurrent nova T CrB has just started its Pre-eruption Dip in March/April 2023, so the eruption should occur around 2024.4 +- 0.3

June 30, 2023

AAVSO Alert Notice 796

Monitoring requested for 12 dwarf novae in support of HST observations in 2022-2023

19 October, 2022

AAVSO Alert Notice 754

Monitoring requested for 15 VY Scl CVs in support of HST observations

14 September 2021

Recent Papers on CVs

For new papers on CVs see astro-ph

Updated 27 October 2023

Period bouncers as detached magnetic cataclysmic variables

Matthias R. Schreiber, Diogo Belloni, Jan van Roestel

A trio of month long flares in the nova-like variable V704 And

Gabriella Zsidi, , C. J. Nixon, , T. Naylor, , J. E. Pringle, and K. L. Page

The peculiar ejecta of Nova V1425 Aquilae

C. Tappert, L. Celedón, L. Schmidtobreick

TESS light curves of cataclysmic variables -- III -- More superhump systems among old novae and novalike variables

Albert Bruch

The recurrent nova T CrB had prior eruptions observed near December 1787 and October 1217 AD

Bradley E. Schaefer

Recurrent Symbiotic Nova T Coronae Borealis Before Outburst

N.A. Maslennikova, A.M. Tatarnikov, A.A. Tatarnikova, A.V. Dodin, V.I. Shenavrin, M.A. Burlak, S.G. Zheltoukhov, I.A. Strakhov

Symbiotic star T CrB as an extreme SU UMa type dwarf nova

Krystian I lkiewicz, Joanna Miko lajewska, and Kiril A. Stoyanov

A catalogue of cataclysmic variables from 20 years of the Sloan

Digital Sky Survey with new classifications, periods, trends and


Keith Inight, Boris T. Gänsicke, Elmé Breedt, Henry T. Israel, Stuart P. Littlefair,

Christopher J. Manser, Tom R. Marsh, Tim Mulvany, Anna Francesca Pala,

John R. Thorstensen

The B & V Light Curves for Recurrent Nova T CrB From 1842--2022, the Unique Pre- and Post-Eruption High-States, the Complex Period Changes, and the Upcoming Eruption in 2025.5±1.3

Bradley E. Schaefer

A magnetic valve at L1 revealed in TESS photometry of the asynchronous polar BY Cam

Paul A. Mason, Colin Littlefield, Lorena C. Monroy, John F. Morales, Pasi Hakala, Peter Garnavich, Paula Szkody, Mark R. Kennedy, Gavin Ramsay, Simone Scaringi

Testing the third body hypothesis in the Cataclysmic Variables LU Camelopardalis, QZSerpentis, V1007 Herculis and BK Lyncis

Carlos E. Chavez, Nikolaos Georgakarakos, Andres Aviles, Hector Aceves, Gagik Tovmassian, Sergey Zharikov, J. E. Perez-Leon, Francisco Tamayo

V392 Persei: a γ-ray bright nova eruption from a known dwarf nova

F. J. Murphy-Glaysher, M. J. Darnley, É. J. Harvey, A. M. Newsam, K. L. Page, S. Starrfield, R. M. Wagner, C. E. Woodward, D. M. Terndrup, S. Kafka, T. Arranz Heras, P. Berardi, E. Bertrand, R. Biernikowicz, C. Boussin, D. Boyd, Y. Buchet, M. Bundas, D. Coulter, D. Dejean, A. Diepvens, S. Dvorak, J. Edlin, T. Eenmae, H. Eggenstein, R. Fournier, O. Garde, J. Gout, D. Janzen, P. Jordanov, H. Kiiskinen, D. Lane, R. Larochelle, R. Leadbeater, D. Mankel, G. Martineau, I. Miller, R. Modic, J. Montier, M. Morales Aimar, E. Muyllaert, R. Naves Nogues, D. O'Keeffe, A. Oksanen, M. Pyatnytskyy, R. Rast, B. Rodgers, D. Rodriguez Perez, F. Schorr, E. Schwendeman, S. Shadick, S. Sharpe, F. Soldán Alfaro, T. Sove, G. Stone, T. Tordai, R. Venne, W. Vollmann, M. Vrastak, K. Wenzel

Romanov V48: unusual intermediate polar in the period gap

Taichi Kato (Kyoto U), Filipp D. Romanov

Transients from the Cataclysmic Deaths of Cataclysmic Variables

Brian D. Metzger, Yossef Zenati, Laura Chomiuk, Ken J. Shen, Jay Strader

The 2021 outburst of RS Oph: a pictorial atlas of the spectroscopic evolution. II. From day 19 to 102 (solar conjunction)

U. Munari & P. Valisa

Spectroscopic Observations of V455 Andromedae Superoutburst in 2007: the Most Exotic Spectral Features in Dwarf Nova Outbursts

Yusuke Tampo, Daisaku Nogami, Taichi Kato, Kazuya Ayani, Hiroyuki Naito, Norio Narita, Mitsugu Fujii, Osamu Hashimoto, Kenzo Kinugasa Satoshi Honda, Hidenori Takahashi, Shin-ya Narusawa, Makoto Sakamoto, Akira Imada

Periodic modulations during a long outburst in V363 Lyr

Taichi Kato

MP Gem: VY Scl-type star, finally

Taichi Kato

The 2019 outburst of the 2005 classical nova V1047 Cen: a record breaking dwarf nova outburst or a new phenomenon?

E. Aydi, K. V. Sokolovsky, J. S. Bright, E. Tremou, M. M. Nyamai, A. Evans, J. Strader, L. Chomiuk, G. Myers, F-J. Hambsch, K. L. Page, D. A. H. Buckley, C. E. Woodward, F. M. Walter, P. Mróz, P. J. Vallely, T. R. Geballe, D. P. K. Banerjee, R. D. Gehrz, R. P. Fender, M. Gromadzki, A. Kawash, C. Knigge, K. Mukai, U. Munari, M. Orio, V. A. R. M. Ribeiro, J. L. Sokoloski, S. Starrfield, A. Udalski, P. A. Woudt

MGAB-V859 and ZTF18abgjsdg: ER UMa-type dwarf novae showing standstills

Taichi Kato, Naoto Kojiguchi (Kyoto U)

The role of complex ionized absorber in the soft X-ray spectra of Intermediate Polars

Nazma Islam, Koji Mukai

The Detailed Light Curve Evolution of V1674 Her (Nova Her 2021)

R. M. Quimby, A. W. Shafter, H. Corbett

The intermediate polar cataclysmic variable GK Persei 120 years after the nova explosion: a first dynamical mass study

A. Álvarez-Hernández (1,2), M. A. P. Torres (1,2), P. Rodríguez-Gil (1,2), T. Shahbaz (1,2), G. C. Anupama (3), K. D. Gazeas (4), M. Pavana (3,5), A. Raj (6), P. Hakala (7), G. Stone (8), S. Gomez (9), P. G. Jonker (10,11), J.-J. Ren (12), G. Cannizzaro (10,11), I. Pastor-Marazuela (13,14), W. Goff (15), J. M. Corral-Santana (16), R. Sabo (17) ((1) Instituto de Astrofísica de Canarias, (2) Departamento de Astrofísica, Universidad de La Laguna, (3) Indian Institute of Astrophysics, (4) Section of Astrophysics, Astronomy and Mechanics, Department of Physics, National and Kapodistrian University of Athens, (5) Department of Physics, Pondicherry University, (6) Dept. of Physics & Astrophysics, University Road, University Enclave, (7) Finnish Centre for Astronomy with ESO (FINCA), Quantum, University of Turku, (8) First Light Observatory Systems, (9) Center for Astrophysics | Harvard & Smithsonian, (10) SRON, Netherlands Institute for Space Research, (11) Department of Astrophysics / IMAPP, Radboud University, (12) CAS Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, Chinese Academy of Sciences, (13) Anton Pannekoek Institute, University of Amsterdam, (14) ASTRON, the Netherlands Institute for Radio Astronomy, (15) American Association of Variable Star Observers, (16) European Southern Observatory, (17) American Association of Variable Star Observers)

CV artwork courtesy Darren Baskill