Cataclysmic Variables Network


Last updated 01:10 UT on 12 August 2022

(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 72 hours



TT Boo

V1504 Cyg


1RXS J161659.5+620014


CY Lyr

V537 Peg

Current superoutbursts (since ...)
ASASSN-22jz :#* (20220808, mag. 9.7)
KK Tel : (20220802, UGSU)
SY Cap (20220801, UGSU)
ASASSN-13ce (20220801, UGSU, precursor outburst on 20220728)
VW Hyi (20220731, UGSU)
V368 Peg (20220731, UGSU)
AO Oct (20220720, UGSU)
V632 Cyg (20220717, UGSU)
MASTER OT J001204.00-412337.
4 #* (20220716; Psh= 0.063 d)
VY Aqr # (20220707, UGSU)
HO Del (20220707, UGSU)
TCP J22561804+4109534 :#* (20220626)
ASASSN-18su :#* (20220624)
QZ Vir = T Leo (20220621)
V485 Cen (20220602, EI Psc star, precursor outburst 20220527)
ASASSN-22ha #* (20220520, UGWZ)
MASTER OT J172758.09+380021.5 (20220514)
TCP J14225968+4122545 = XM116HT #* (20220509, UGWZ)
BC UMa #* (20220430, UGWZ, faint superoutburst)

Z Cam-type dwarf novae at standstill
HL CMa (since 20211205 or earlier)
Z Cam ends long 1,051 day standstill on 20210828 (started on 20181012)

# indicates a noteworthy or unusual activity

: indicates confirmation required
indicates time-resolved photometry required

CV News

AAVSO Alert Notice 784

T Pyx monitoring requested for upcoming HST campaigns

5 July 2022

AAVSO Alert Notice 783

V485 Aqr and UU Aql are HST targets in July and August

5 July 2022

Another dwarf nova outburst of X Serpentis (Nova 1903) began on 2022 June 9 (a previous outburst outburst occurred from 2021 July 28 to September 10).

AAVSO Alert Notice 781

Nova in Musca – Nova Muscae 2022 (= ASASSN-22hw = AT 2022mmp)

Note: N Mus 2022 = V415 Mus

14 June 2022

AAVSO Alert Notice 758

Monitoring requested for 11 dwarf novae in support of HST observations in 2021–2022

26 October 2021

AAVSO Alert Notice 754

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

14 September 2021

AAVSO Alert Notice 753

Monitoring requested for seven intermediate polars

23 August 2021

Recent Papers on CVs

For new papers on CVs see astro-ph

Updated 8 June 2022

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