CVNET

Cataclysmic Variables Network

ACTIVITY AT A GLANCE

Last updated 14:57 UT on 24 May 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


YYYYMMDD

20220524

BR Lup

AS Pav

V598 Sco

HS Vir

ASASSN-16dc


20220523

SV CMi

V792 Cyg

TU Men

V537 Peg

ASASSN-14bp

ASASSN-15cl


20220522

HT Cam (intermediate polar)

OQ Car

AG Hya


Current superoutbursts (since ...)
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 775

GP Comae Berenices observations needed now for HST coverage (2022 April 28 – May 20)

27 April 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 arxiv.org astro-ph


Updated 7 April 2022


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