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I analyzed Transiting Exoplanet Survey Satellite (TESS) observations of the 2020 superoutburst of the SU~UMa-type dwarf nova V844 Her. This object showed "textbook" superhump stages A, B and C confirmed by modern satellite observations. The…

Solar and Stellar Astrophysics · Physics 2022-05-12 Taichi Kato

We report on time-resolved photometry during a 2012 January normaloutburst of SU UMa. The light curve shows hump-like modulations with a period of 0.07903(11) d, which coincides with the known superhump period of SU UMa during…

Solar and Stellar Astrophysics · Physics 2015-06-11 Akira Imada , Hideyuki Izumiura , Daisuke Kuroda , Kenshi Yanagisawa , Nobuyuki Kawai , Toshihiro Omodaka , Ryo Miyanoshita

We report the results of 67h of CCD photometry of the recently discovered dwarf nova SDSS J210014.12+004446.0. The data were obtained on 24 nights spanning a month. During this time we observed four ordinary outbursts lasting about 2-3 days…

Solar and Stellar Astrophysics · Physics 2015-05-13 A. Olech , A. Rutkowski , A. Schwarzenberg-Czerny

We report extensive photometry of the dwarf nova KS UMa throughout its 2003 superoutburst till quiescence. During the superoutburst the star displayed clear superhumps with a mean period of Psh = 0.070092(23) days. In the middle stage of…

CRTS J035905.9+175034 is the first eclipsing SU UMa system for which a superoutburst has been observed by Kepler in the short-cadence mode. The light curve contains one superoutburst, eight normal outbursts (including a precursor to the…

Solar and Stellar Astrophysics · Physics 2018-05-23 Colin Littlefield , Peter Garnavich , Mark Kennedy , Paula Szkody , Zhibin Dai

Continuing the project described by Kato et al. (2009, arXiv:0905.1757), we collected times of superhump maxima for 102 SU UMa-type dwarf novae observed mainly during the 2014-2015 season and characterized these objects. Our project has…

Solar and Stellar Astrophysics · Physics 2015-10-21 Taichi Kato , Franz-Josef Hambsch , Pavol A. Dubovsky , Igor Kudzej , Berto Monard , Ian Miller , Hiroshi Itoh , Seiichiro Kiyota , Kazunari Masumoto , Daiki Fukushima , Hiroki Kinoshita , Kazuki Maeda , Jyunya Mikami , Risa Matsuda , Naoto Kojiguchi , Miho Kawabata , Megumi Takenaka , Katsura Matsumoto , Enrique de Miguel , Yutaka Maeda , Tomohito Ohshima , Keisuke Isogai , Roger D. Pickard , Arne Henden , Stella Kafka , Hidehiko Akazawa , Noritoshi Otani , Sakiko Ishibashi , Minako Ogi , Kenji Tanabe , Kazuyoshi Imamura , William Stein , Kiyoshi Kasai , Tonny Vanmunster , Peter Starr , Elena P. Pavlenko , Oksana I. Antonyuk , Kirill A. Antonyuk , Aleksei A. Sosnovskij , Nikolaj V. Pit , Julia V. Babina , Aleksandr Sklyanov , Rudolf Novak , Arto Oksanen , Shawn Dvorak , Raul Michel , Gianluca Masi , Colin Littlefield , Joseph Ulowetz , Sergey Yu. Shugarov , Polina Yu. Golysheva , Drahomir Chochol , Viktoriia Krushevska , Javier Ruiz , Tamas Tordai , Etienne Morelle , Richard Sabo , Hiroyuki Maehara , Michael Richmond , Natalia Katysheva , Kenji Hirosawa , William N. Goff , Franky Dubois , Ludwig Logie , Steve Rau , Irina B. Voloshina , Maksim V. Andreev , Kazuhiko Shiokawa , Vitaly V. Neustroev , George Sjoberg , Sergey Zharikov , Nick James , Greg Bolt , Tim Crawford , Denis Buczynski , Lewis M. Cook , Christopher S. Kochanek , Benjamin Shappee , Krzysztof Z. Stanek , Jose L. Prieto , Denis Denisenko , Hideo Nishimura , Masaru Mukai , Shizuo Kaneko , Seiji Ueda , Rod Stubbings , Masayuki Moriyama , Patrick Schmeer , Eddy Muyllaert , Jeremy Shears , Robert J. Modic , Kevin B. Paxson

We analyzed a Kepler light curve of KIC 8751494, a recently recognized novalike cataclysmic variable in the Kepler field. We detected a stable periodicity of 0.114379(1) d, which we identified as being the binary's orbital period. The…

Solar and Stellar Astrophysics · Physics 2015-06-15 Taichi Kato , Hiroyuki Maehara

Analysis of observations of the SU UMa-type dwarf nova, CP Dra, between February 2001 and April 2009 has revealed 15 outbursts, at least eight of which were superoutbursts. The supercycle length is 230+/-56 d. We report photometry of the…

We identify a previously undetected periodicity at a frequency of 49.08$\pm$0.01 d$^{-1}$ (period of 29.34$\pm$0.01 minutes) during a super-outburst of V844 Her observed by TESS. V844 Her is an SU UMa type cataclysmic variable with an…

Solar and Stellar Astrophysics · Physics 2023-08-22 A. Greiveldinger , P. Garnavich , C. Littlefield , M. R. Kennedy , J. P. Halpern , J. R. Thorstensen , P. Szkody , A. Oksanen , R. S. Boyle

We report the photometric analysis of SU UMa based on the observations of the Transiting Exoplanet Survey Satellite (TESS). TESS has released a large amount of data, which contains the light curves of a complete superoutburst and three…

Solar and Stellar Astrophysics · Physics 2024-05-21 Wei Liu , Xiang-Dong Shi , Xiao-Hui Fang , Qi-Shan Wang

We report time-resolved optical CCD photometry on newly discovered SU UMa-type dwarf novae, FL TrA and CTCV J0549-4921. During the 2006 August outburst, we detected superhumps with a period of 0.59897(11) days for FL TrA, clarifying the SU…

Continuing the project described by Kato et al. (2009, PASJ, 61, S395, arXiv:0905.1757), we collected times of superhump maxima for 56 SU UMa-type dwarf novae mainly observed during the 2013-2014 season and characterized these objects. We…

Solar and Stellar Astrophysics · Physics 2015-06-22 Taichi Kato , Pavol A. Dubovsky , Igor Kudzej , Franz-Josef Hambsch , Ian Miller , Tomohito Ohshima , Chikako Nakata , Miho Kawabata , Hirochika Nishino , Kazunari Masumoto , Sahori Mizoguchi , Masayuki Yamanaka , Katsura Matsumoto , Daisuke Sakai , Daiki Fukushima , Minami Matsuura , Genki Bouno , Megumi Takenaka , Shinichi Nakagawa , Ryo Noguchi , Eriko Iino , Roger D. Pickard , Yutaka Maeda , Arne Henden , Kiyoshi Kasai , Seiichiro Kiyota , Hidehiko Akazawa , Kazuyoshi Imamura , Enrique de Miguel , Hiroyuki Maehara , Berto Monard , Elena P. Pavlenko , Kirill Antonyuk , Nikolaj Pit , Oksana I. Antonyuk , Aleksei V. Baklanov , Javier Ruiz , Michael Richmond , Arto Oksanen , Caisey Harlingten , Sergey Yu. Shugarov , Drahomir Chochol , Gianluca Masi , Francesca Nocentini , Patrick Schmeer , Greg Bolt , Peter Nelson , Joseph Ulowetz , Richard Sabo , William N. Goff , William Stein , Raul Michel , Shawn Dvorak , Irina B. Voloshina , Vladimir Metlov , Natalia Katysheva , Vitaly V. Neustroev , George Sjoberg , Colin Littlefield , Bartlomiej Debski , Paulina Sowicka , Marcin Klimaszewski , Malgorzata Curylo , Etienne Morelle , Ivan A. Curtis , Hidetoshi Iwamatsu , Neil D. Butterworth , Maksim V. Andreev , Nikolai Parakhin , Aleksandr Sklyanov , Kazuhiko Shiokawa , Rudolf Novak , Tat'yana R. Irsmambetova , Hiroshi Itoh , Yoshiharu Ito , Kenji Hirosawa , Denis Denisenko , Christopher S. Kochanek , Benjamin Shappee , Krzysztof Z. Stanek , Jose L. Prieto , Koh-ichi Itagaki , Rod Stubbings , Jose Ripero , Eddy Muyllaert , Gary Poyner

We have discovered a dwarf nova (DN) of type SU UMa in Kepler data which is 7.0 arcsec from the G-type exoplanet survey target KIC 4378554. The DN appears as a background source in the pixel aperture of the foreground G star. We extracted…

Solar and Stellar Astrophysics · Physics 2015-06-04 Thomas Barclay , Martin Still , Jon M. Jenkins , Steve B. Howell , Rachael M. Roettenbacher

A monitoring programme of CSS 121005:212625+201948 covering nearly two observing seasons has shown that it is a typical SU UMa dwarf nova, but it has one of the shortest supercycles of its class, at 66.9(6) d. The superoutbursts are…

We presents result of CDD photometry for SU UMa dwarf nova NY Her during 6 nights in June 2017 when object was in quiescence. Light curves clearly show strong amplitude variations in a range of 0m.7-1m.1. Time series analysis revealed a…

Solar and Stellar Astrophysics · Physics 2017-09-28 A. Sosnovskij , E. Pavlenko , N. Pit , K. Antoniuk

We report photometry of V358 Lyr during its 2008 November outburst, the first confirmed outburst since 1965. At its brightest the star was V=15.9 and the outburst amplitude was at least 7.3 magnitudes and lasted at least 23 days. The first…

Solar and Stellar Astrophysics · Physics 2009-05-13 Jeremy Shears , David Boyd , Tut Campbell , Shawn Dvorak , Robert Koff , Tom Krajci , Ian Miller , Gary Poyner , George Roberts , Arne Henden

Time-resolved CCD photometry is presented of the recently-discovered (V~15 at maximum light) eruptive variable star in Taurus, which we dub VS0329+1250. A total of ~20 hr of data obtained over six nights reveals superhumps in the light…

Astrophysics · Physics 2009-11-13 A. W. Shafter , E. A. Coelho , J. K. Reed

We carried out time-resolved photometric observations of an SU UMa type dwarf nova, BC UMa, during its superoutburst in February 2003. We detect early superhumps (or outburst orbital humps) during the first two days of the outburst. The…

Astrophysics · Physics 2015-06-24 Hiroyuki Maehara , Izumi Hachisu , Kazuhiro Nakajima