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During June 2007 the first confirmed superoutburst of the eclipsing dwarf nova SDSS J122740.83+513925.9 was observed using CCD photometry. The outburst amplitude was at least 4.7 magnitudes. The orbital period was measured as 0.06296(5) d…

Astrophysics · Physics 2007-11-15 Jeremy Shears , Steve Brady , Jerry Foote , Donn Starkey , Tonny Vanmunster

We report time-resolved CCD photometry of the cataclysmic variable EG Aquarii during the 2006 November outburst During the outburst, superhumps were unambiguously detected with a mean period of 0.078828(6) days, firstly classifying the…

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…

We present photometric study of NY Ser, an in-the-gap SU UMa-type nova, in 2002 and 2013. We determined the duration of the superoutburst and the mean superhump period to be 18 d and 0.10458 d, respectively. We detected in 2013 that NY Ser…

SU UMa stars are characterized by "superoutbursts" which are brighter at maximum light and which last much longer than the more frequent "ordinary" outbursts of these dwarf novae. Although there are now more than 1180 SU UMa type dwarf…

Solar and Stellar Astrophysics · Physics 2021-03-17 N. Vogt , E. C. Puebla , A. Contreras-Quijada

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 the superhumps analysis of seven SU UMa-type dwarf novae based on the observations of Transiting Exoplanet Survey Satellite (TESS). Superhumps are seen during superoutbursts of SU UMa-type dwarf novae. The month-long data sets of…

Solar and Stellar Astrophysics · Physics 2024-05-21 Wei Liu , Shengbang Qian

We observed an anomalously outbursting state of SU UMa which occurred in 1992. Time-resolved photometry revealed the presence of signals with a period of 0.0832 +/- 0.0019 d, which is 3.6 sigma longer than the orbital period (0.07635 d) of…

Astrophysics · Physics 2009-11-07 Taichi Kato

During the British Astronomical Association (BAA) 2022 campaign, 27436 photometric observations of the dwarf nova (DN) CG Draconis were made, with 106 eclipses recorded. This work summarizes the new data available and provides updated…

Solar and Stellar Astrophysics · Physics 2023-05-03 Maxim Usatov , Jeremy Shears

We report photometry results of a frequently outbursting dwarf nova, ER Ursae Majoris. To measure the outburst parameters of the system, we carried out analyses of the light curve, periodograms, and O-C diagrams. We investigated the…

Solar and Stellar Astrophysics · Physics 2026-01-26 K. Bakowska , B. Kirpluk , P. Zielinski , M. Motylinski , A. Gurgul , J. Golonka , K. Szyszka

We report photometric and spectroscopic observations of the SU UMa-type dwarf novae, KS Ursae Majoris, during its 2003 February superoutburst. Modulations with a period of $0.07017\pm0.00021$ day, which is 3.3% larger than the orbital…

Astrophysics · Physics 2008-11-26 Yinghe Zhao , Zongyun Li , Xiaoan Wu , Qiuhe Peng , Zhousheng Shang , Zili Li

We carried out time-resolved $V$-band photometry of DM Lyr during long outbursts in 1996 July and in 1996 February-March at Ouda Station, Kyoto University and at Osaka Kyoiku University. Since superhumps were clearly detected in the light…

Astrophysics · Physics 2015-06-24 D. Nogami , H. Baba , K. Matsumoto , T. Kato

We report on extensive photometry of the dwarf nova SS Ursae Minoris throughout nine months of 2004. In total, we recorded two superoutbursts and 11 normal outbursts of the star. SS UMi has been known to show frequent superoutbursts with a…

Astrophysics · Physics 2009-11-11 A. Olech , K. Mularczyk , P. Kedzierski , K. Zloczewski , M. Wisniewski , K. Szaruga

We report time-resolved photometric observations of the Hamburg Quasar Survey-selected dwarf nova HS 1449+6415 (= RX J1450.5+6403) during the interval from JD 2451672 to 2451724. During a long outburst with a duration of ~12 days, we…

Astrophysics · Physics 2007-05-23 D. Nogami , D. Engels , B. T. Gaensicke , E. P. Pavlenko , R. Novak , K. Reinsch

We report extensive photometry of the dwarf nova V660 Herculis. During our campaign, lasting from August 2003 to November 2004, we recorded one bright eruption which turned out to be a superoutburst lasting about 15 days and having…

Astrophysics · Physics 2007-05-23 A. Olech , K. Zloczewski , L. M. Cook , K. Mularczyk , P. Kedzierski , M. Wisniewski

We studied the background dwarf nova of KIC 11412044 in the Kepler public data and identified it with GALEX J194419.33+491257.0. This object turned out to be a very active SU UMa-type dwarf nova having a mean supercycle of about 150 d and…

Solar and Stellar Astrophysics · Physics 2015-06-18 Taichi Kato , Yoji Osaki

We present the TESS observations of CRTS J110014.7+131552, SDSS J093537.46+161950.8, and [PK2008] HalphaJ130559. Among them, a superoutburst is observed in CRTS J110014.7+131552 which is associated with the precursor outburst, where…

Solar and Stellar Astrophysics · Physics 2025-08-29 Arti Joshi , Claus Tappert , Márcio Catelan , Linda Schmidtobreick , Mridweeka Singh

We report on time-resolved photometry of the 2005 July superoutburst of the dwarf nova, 2QZ J021927.9-304545. The resultant light curves showed conspicuous superhumps with a period of 0.081113(19) days, confirming the SU UMa nature of the…

Astrophysics · Physics 2015-06-24 Akira Imada , Taichi Kato , L. A. G. Monard , Alon Retter , Alex Liu , Daisaku Nogami

We report CCD photometry of the superoutburst of the dwarf nova V1212 Tau obtained during 2011 January and February. The outburst amplitude was at least 6 magnitudes and it lasted at least 12 days. Three distinct superhump regimes were…

Solar and Stellar Astrophysics · Physics 2011-09-21 Jeremy Shears , Tom Krajci , Enrique de Miguel , Ian Miller , Etienne Morelle , George Roberts , Richard Sabo , William Stein , Raoul Behrend