Related papers: IX Draconis - a curious ER UMa-type dwarf nova

Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. VII: The Seventh Year (2014-2015)

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

Results of a campaign to observe outbursts of the dwarf nova CSS 121005:212625+201948

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…

Solar and Stellar Astrophysics · Physics 2015-05-29 Jeremy Shears , James Boardman , David Boyd , Denis Buczynski , Pavol Dubovsky , Juan-Luis Gonzalez Carballo , Kenneth Menzies , Ian Miller , Roger Pickard , Gary Poyner , Richard Sabo , Richard Sargent

Photometric Observation and Numerical Simulation of Early Superhumps in BC UMa during the 2003 Superoutburst

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

The orbital and superhump periods of the dwarf nova HS 0417+7445 in Camelopardalis

We present the 2005-2010 outburst history of the SUUMa-type dwarf HS 0417+7445,along with a detailed analysis of extensive time-series photometry obtained in March 2008 during the second recorded superoutburst of the system. The mean…

Solar and Stellar Astrophysics · Physics 2015-05-20 J. H. Shears , B. T. Gaensicke , S. Brady , P. Dubovsky , I. Miller , B. Staels

Curious Variables Experiment (CURVE). Superhump Period Change Pattern in KS UMa and Other Dwarf Novae

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…

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

Study of Negative and Positive Superhumps in ER Ursae Majoris

We carried out the photometric observations of the SU UMa-type dwarf nova ER UMa during 2011 and 2012, which showed the existence of persistent negative superhumps even during the superoutburst. We performed two-dimensional period analysis…

Solar and Stellar Astrophysics · Physics 2015-06-18 Tomohito Ohshima , Taichi Kato , Elena Pavlenko , Hidehiko Akazawa , Kazuyoshi Imamura , Kenji Tanabe , Enrique de Miguel , William Stein , Hiroshi Itoh , Franz-Josef Hambsch , Pavol A. Dubovsky , Igor Kudzej , Thomas Krajci , Alex Baklanov , Denis Samsonov , Oksana Antonyuk , Viktor Malanushenko , Maksim Andreev , Ryo Noguchi , Kazuyuki Ogura , Takashi Nomoto , Rikako Ono , Shin'ichi Nakagawa , Keisuke Taniuchi , Tomoya Aoki , Miho Kawabata , Hitoshi Kimura , Kazunari Masumoto , Hiroshi Kobayashi , Katsura Matsumoto , Kazuhiko Shiokawa , Sergey Yu. Shugarov , Natalia Katysheva , Irina Voloshina , Polina Zemko , Kiyoshi Kasai , Javier Ruiz , Hiroyuki Maehara , Natalia Virnina , Jani Virtanen , Ian Miller , Boyd Boitnott , Colin Littlefield , Nick James , Tamas Tordai , Fidrich Robaert , Stefono Padovan , Atsushi Miyashita

Measuring the superhump period of the dwarf nova RX J1715.6+6856

We report unfiltered CCD observations of the first confirmed superoutburst of the dwarf nova RX J1715.6+6856 in August 2009. At quiescence the star was magnitude 18.3 (CCD, clear). The outburst amplitude was at least 2.4 magnitudes and it…

Solar and Stellar Astrophysics · Physics 2009-12-22 Jeremy Shears , Ian Miller , Richard Sabo

NY Serpentis: SU UMa-Type Nova in the Period Gap with Diversity of Normal Outbursts

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…

Solar and Stellar Astrophysics · Physics 2015-06-22 Elena P. Pavlenko , Taichi Kato , Oksana I. Antonyuk , Tomohito Ohshima , Franz-Josef Hambsch , Kirill A. Antonyuk , Aleksei A. Sosnovskij , Alex V. Baklanov , Sergey Yu. Shugarov , Nikolaj V. Pit , Chikako Nakata , Gianluca Masi , Kazuhiro Nakajima , Hiroyuki Maehara , Pavol A. Dubovsky , Igor Kudzej , Maksim V. Andreev , Yuliana G. Kuznyetsova , Kirill A. Vasiliskov

Photometric study of new southern SU UMa-type dwarf novae - II: Authentication of BF Ara as a Normal SU UMa-type Dwarf Nova with the Shortest Supercycle

We photometrically observed the 2002 August long outburst of BF Ara. The observation for the first time unambiguously detected superhumps (average period 0.08797(1) d), qualifying BF Ara as a genuine SU UMa-type dwarf nova. An analysis of…

Astrophysics · Physics 2009-11-07 T. Kato , G. Bolt , P. Nelson , B. Monard , R. Stubbings , A. Pearce , H. Yamaoka , T. Richards

Curious Variables Experiment (CURVE). CCD Photometry of Dwarf Nova V660 Herculis

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

The first confirmed superoutburst of the dwarf nova GALEX J215818.5+241924

In 2011 October an optical transient was reported in Pegasus as a possible nova. The object had an ultraviolet counterpart, GALEX J215818.5+241924. In this paper we present follow-up photometry of the object which revealed the presence of…

Solar and Stellar Astrophysics · Physics 2013-01-03 Jeremy Shears , Robert Koff , Gianluca Masi , Enrique de Miguel , Ian Miller , George Roberts , Richard Sabo , William Stein , Joseph Ulowetz

MN Dra - In-the-Gap Dwarf Nova With Negative Superhumps

The multi-site photometric observations of MN Dra were made over 77 nights in August-November, 2009. The total exposure was 433 hours. During this time the binary underwent two superoutbursts and five normal outbursts. During the course of…

Solar and Stellar Astrophysics · Physics 2015-05-27 Elena Pavlenko , Taichi Kato , Max Andreev , Alexandr Sklyanov , Alexandra Zubareva , Denis Samsonov , Irina Voloshina , Vladimir Metlov , Sergey Shugarov , Nikolay Parakhin , Alex Golovin , Oksana Antoniuk

Detection of the Supercycle in V4140 Sagittarii: First Eclipsing ER Ursae Majoris-like Object

We observed the deeply eclipsing SU UMa-type dwarf nova V4140 Sgr and established the very short supercycle of 69.7(3) d. There were several short outbursts between superoutbursts. These values, together with the short orbital period…

Solar and Stellar Astrophysics · Physics 2018-05-16 Taichi Kato , Franz-Josef Hambsch , Lewis M. Cook

A Newly Discovered SU UMa-Type Dwarf Nova, HS 1449+6415

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

Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. IV: The Fourth Year (2011-2012)

Continuing the project described by Kato et al. (2009, arXiv:0905.1757), we studied 86 SU UMa-type dwarf novae. We confirmed the general trends such as the relation between period derivatives and orbital periods. There are some systems…

Solar and Stellar Astrophysics · Physics 2015-06-11 Taichi Kato , Franz-Josef Hambsch , Hiroyuki Maehara , Gianluca Masi , Ian Miller , Ryo Noguchi , Chihiro Akasaka , Tomoya Aoki , Hiroshi Kobayashi , Katsura Matsumoto , Shinichi Nakagawa , Takuma Nakazato , Takashi Nomoto , Kazuyuki Ogura , Rikako Ono , Keisuke Taniuchi , William Stein , Arne Henden , Enrique de Miguel , Seiichiro Kiyota , Pavol A. Dubovsky , Igor Kudzej , Kazuyoshi Imamura , Hidehiko Akazawa , Ryosuke Takagi , Yuya Wakabayashi , Minako Ogi , Kenji Tanabe , Joseph Ulowetz , Etienne Morelle , Roger D. Pickard , Tomohito Ohshima , Kiyoshi Kasai , Elena P. Pavlenko , Oksana I. Antonyuk , Aleksei V. Baklanov , Kirill Antonyuk , Denis Samsonov , Nikolaj Pit , Aleksei Sosnovskij , Colin Littlefield , Richard Sabo , Javier Ruiz , Thomas Krajci , Shawn Dvorak , Arto Oksanen , Kenji Hirosawa , William N. Goff , Berto Monard , Jeremy Shears , David Boyd , Irina B. Voloshina , Sergey Yu. Shugarov , Drahomir Chochol , Atsushi Miyashita , Jochen Pietz , Natalia Katysheva , Hiroshi Itoh , Greg Bolt , Maksim V. Andreev , Nikolai Parakhin , Viktor Malanushenko , Fabio Martinelli , Denis Denisenko , Chris Stockdale , Peter Starr , Mike Simonsen , Paul. J. Tristram , Akihiko Fukui , Tamas Tordai , Robert Fidrich , Kevin B. Paxson , Koh-ichi Itagaki , Youichirou Nakashima , Seiichi Yoshida , Hideo Nishimura , Timur V. Kryachko , Andrey V. Samokhvalov , Stanislav A. Korotkiy , Boris L. Satovski , Rod Stubbings , Gary Poyner , Eddy Muyllaert , Vladimir Gerke , Walter MacDonald , Michael Linnolt , Yutaka Maeda , Hubert Hautecler

Superhumps in the Rarely Outbursting SU UMa-Type Dwarf Nova, HO Delphini

We observed the 1994, 1996 and 2001 outbursts of HO Del. From the detection of secure superhumps, HO Del is confirmed to be an SU UMa-type dwarf nova with a superhump period of 0.06453(6) d. Based on the recent observations and the past…

Astrophysics · Physics 2015-06-24 T. Kato , D. Nogami , M. Moilanen , H. Yamaoka

On supercycle lengths of active SU UMa stars

We performed a detailed analysis of extensive photometric observations of a sample of most active dwarf novae, that is SU UMa stars which are characterised by supercycle lengths shorter than 120 days. We found the observational evidence…

Solar and Stellar Astrophysics · Physics 2015-06-15 M. Otulakowska-Hypka , A. Olech

Detection of Change in Supercycles in ER Ursae Majoris

We examined data on about 20 years of observations of ER UMa available in AAVSO, VSNET, AFOEV, NSVS, VSOLJ databases together with published light curves. The obtained O-C diagram revealed a systematic change of the supercycle (time…

Solar and Stellar Astrophysics · Physics 2015-06-12 Polina Zemko , Taichi Kato , Sergey Shugarov

Discovery of a New Deeply Eclipsing SU UMa-Type Dwarf Nova, IY UMa (= TmzV85)

We discovered a new deeply eclipsing SU UMa-type dwarf nova, IY UMa, which experienced a superoutburst in 2000 January. Our monitoring revealed two distinct outbursts, which suggest a superoutburst interval of ~800 d, or its half, and an…

Astrophysics · Physics 2015-06-24 M. Uemura , T. Kato , K. Matsumoto , K. Takamizawa , P. Schmeer , L. T. Jensen , T. Vanmunster , R. Novak , B. Martin , J. Pietz , D. Buczynski , T. Kinnunen , M. Moilanen , A. Oksanen , Lewis M. Cook , T. Watanabe , H. Maehara , H. Itoh

GALEX J194419.33+491257.0: An Unusually Active SU UMa-Type Dwarf Nova with a Very Short Orbital Period in the Kepler Data

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