CVNET

Cataclysmic Variables Network

ACTIVITY AT A GLANCE

Last updated 16:01 UT on 3 December 2021

(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


YYYYMMDD


20211203

GS Pav


20211201

CR Boo

Z Cam

AM Cas

V452 Cas

IR Gem

DO Leo

MV Leo

CN Ori

KT Per

CY UMa

ASASSN-13dc

ASASSN-13pq

CRTS J084358.1+425037

SDSS J092229.26+330743.6


20211130

WW Cet

WX Hyi

DT Pyx (rebrightening)




Current superoutbursts (since ...)
MASTER OT J030227.28+191754.5 #* (20211126, UGWZ – not a nova)
MASTER OT J085854.16-274030.7 (20211119, UGWZ)
CRTS J002656.6+284933 #* (20211023, UGSU, above period gap)
OGLE-MC-DN-0008 #* (20211019, very rare outburst)
1RXS J003828.7+250920 (20211014, UGSU)
ASASSN-14ac # (20211015, UGWZ, precursor outburst 20211013)
SDSS J203501.46-001946.1 :* (20210927, UGSU:)
MASTER OT J055845.55+391533.4 * (20210923, UGSU)
ASASSN-16og : (20210921, UGSU)
LL And #* (20210912, UGWZ)
ASASSN-19ax
:* (20210910, UGSU:)
SU UMa (20211009)

MASTER OT J055845.55+391533.4 (20210909, UGSU)
NY Her (20210828, UGSU)
V493 Lyr : (20210828, UG)
V1024 Per (20210827, UGSU)
GV Psc (20210827, UGSU)
OT J215818.5+241925 * (20210827, UGSU)
SDSS J172102.48+273301.2 #* (20210826, AM CVn star)
ASASSN-21nv :# (20210727, UGWZ:)

V627 Peg #* (20210715, UGWZ)

Z Cam-type dwarf novae at standstill
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 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 CV's see arxiv.org 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