Last updated 11:04 UT on May 15, 2025
(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 email lists.
New outbursts and unusual activity reported in the last 5 days
YYYYMMD
20250515
V503 Cyg
20250514
CK Eri
V391 Lyr
CN Ori
20250513
V632 Cyg
CY Lyr
V1159 Ori
RZ Sge
TW Vir
DDE 76
20250512
AT Ara
HL CMa
V344 Lyr
CL Pup
VZ Pyx
ASASSN-20pv
20250511
V493 Lyr
# indicates a noteworthy or unusual activity
: indicates confirmation required
* indicates time-resolved photometry required
TCP J13560585+3727068: new WZ Sge-type dwarf nova
April 30, 2025
------------------------------------------------------------
TCP J08374922+0134065: new WZ Sge-type dwarf nova with large early superhump amplitude
VSNET-ALERT 28055
April 07, 2025
------------------------------------------------------------
Photometry in support of TESS and Swift Observations of common-envelope post-novae
Active Dates: April 1, 2025 – June 29, 2025
---------------------------------------------------
Outburst of LINEAR 23795703 - a CV of uncertain type in UMa
VSNET-ALERT 28053 Kirill Sokolovsky
March 26, 2025
For new papers on CVs see arxiv.org astro-ph
Updated May 15, 2025
A 70 pc-Diameter Nova Super-remnant Surrounding the Recurrent Nova RS Ophiuchi
Michael M. Shara, Kenneth M. Lanzetta, Alexandra Masegian, James T. Garland, Stefan Gromoll, Alexei Kniazev, Lee Townsend, David Zurek, Joanna Mikolajewska, David Valls-Gabaud, Frederick M. Walter, John K. Webb
Mariko Kimura, Takayuki Hayashi, Yuuki Wada, Wataru Iwakiri, Shigeyuki Sako, Martina Veresvarska, Simone Scaringi, Noel Castro-Segura, Christian Knigge, Keith C. Gendreau, Zaven Arzoumanian
ASASSN-14dx: A cataclysmic variable harbouring a massive pulsating white dwarf
Pasi Hakala, Ingrid Pelisoli, Boris T. Gaensicke, Pablo Rodriguez-Gil, Thomas R. Marsh, Elme Breedt, John R. Thorstensen, Anna F. Pala
S. Starrfield, M. Bose, C. E. Woodward, C. Iliadis, W. R. Hix, A. Evans, G. Shaw, D. P. K. Banerjee, T. Liimets, K. L. Page, T. R. Geballe, I. Ilyin, I. Perron, R. M. Wagner
GOTO065054+593624: a peculiar dwarf nova identified in real time via Kilonova Seekers
T. L. Killestein, G. Ramsay, M. Kennedy, L. Kelsey, D. Steeghs, S. Littlefair, B. Godson, J. Lyman, M. Pursiainen, B. Warwick, C. Krawczyk, L. K. Nuttall, E. Wickens, S. D. Alexandrov, C. M. da Silva, R. Leadbeater, K. Ackley, M. J. Dyer, F. Jiménez-Ibarra, K. Ulaczyk, D. K. Galloway, V. S. Dhillon, P. O'Brien, K. Noysena, R. Kotak, R. P. Breton, E. Pallé, D. Pollacco, A. Kumar, D. O'Neill, T. Butterley, R. Wilson, S. Mattila, A. Sahu, R. Starling, C. Y. Wang, Q. Liu, A. Li, Z. Dai, H. Feng, W. Yuan, R. Billington, A. G. Bull, S. Gaudenzi, V. Gonano, H. Krawczyk, M. T. Mazzucato, A. Pasqua, J. A. da Silva Campos, M. Torres-Guerrero, N. N. Antonov, S. J. Bean, E.T. Boeneker, S. M. Brincat, G. S. Darlington, F. Dubois, F.-J. Hambsch, D. Messier, A. Oksanen, G. Poyner, F. D. Romanov, I. D. Sharp, T. Tordai, T. Vanmunster, K. Wenzel
Bridging the Gap: OPTICAM Reveals the Hidden Spin of the WZ Sge Star GOTO 065054.49+593624.51
N. Castro Segura, Z. A. Irving, F. M. Vincentelli, D. Altamirano, Y. Tampo, C. Knigge, I. Pelisoli, D. L. Coppejans, N. Rawat, A. Castro, A. Sahu, J. V. Hernández Santisteban, M. Kimura, M. Veresvarska, R. Michel, S. Scaringi, M. Najera
Superoutbursts and Positive Superhumps are Detected During the Standstill in AT Cnc
Qi-Bin Sun, Sheng-Bang Qian, Li-Ying Zhu, Qin-Mei Li Fu-Xing Li, Min-Yu Li, Ping Li
The Rise of Nova V1674 Herculis
Robert M. Quimby, Brian D. Metzger, Ken J. Shen, Allen W. Shafter, Hank Corbett, Madeline Overton
3D physical structure and angular expansion of the remnant of the recurrent nova T Pyx
E. Santamaría, J. A. Toalá, M. A. Guerrero, G. Ramos-Larios, L. Sabin
Discovery of a nova super-remnant cavity surrounding RS Ophiuchi
M. W. Healy-Kalesh, M. J. Darnley, E. J. Harvey, A. M. Newsam
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
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
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
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
CV artwork courtesy Darren Baskill