Cataclysmic Variables Network


Last updated 09:48 UT on 17 January 2022

(All objects mentioned 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 email lists.

New outbursts and unusual activity reported in the last 72 hours



IZ And :

DO Leo

RU LMi :

ASASSN-15by :

CRTS J082603.7+113821 :


V537 Peg


RX And
NSV 14473


MASTER OT J015016.17+375620.5 :

MASTER OT J024847.86+501239.7

MASTER OT J073208.11+064149.5 :

SDSS J113551.09+532246.2

Current superoutbursts (since ...)
RZ Leo #* (20220112, UGWZ)
ASASSN-22ak :#* (20220107)
TU Tri (20220104, UGSU)
ASASSN-15cl (20220103, UGSU)
EF Peg :# (20211230, UGSU)
TV Crv (20211229, UGSU)
CRTS J045446.8-181214 :* (20211229, UG)
V485 Cen (20211225, EI Psc star)
V592 Her # (<=20211224, UGWZ)

MASTER OT J030227.28+191754.5 #* (20211126, UGWZ – not a nova)
MASTER OT J085854.16-274030.7 (20211119, UGWZ)

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 764 & 765

GP Com to be observed with HST - January 18

3 January 2022

TCP J07094936+1412280

Large outburst amplitude of 7.7 mag. Possible WZ Sge-type object in Gemini.

vsnet-alert 26492 (28 December 2021)

AAVSO Alert Notice 762

YZ LMi to be observed with HST – coverage needed now
(YZ Leonis Minoris is an AM CVn star)

21 December 2021

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


For new papers on CV's see astro-ph

Updated 16 November 2021

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