Variable Star Network: World Center for Transient Object Astronomy and Variable Stars

Abstract

Variable Star Network (VSNET, http://www.kusastro.kyoto-u.ac.jp/vsnet/) is a global professional-amateur network of researchers in variable stars and related objects, particularly in transient objects, such as cataclysmic variables, black hole binaries, supernovae and gamma-ray bursts. The VSNET has been playing a pioneering role in establishing the field of "transient object astronomy", by effectively incorporating modern advance in observational astronomy and global electronic network, as well as collaborative progress in theoretical astronomy and astronomical computing. The VSNET is now one of the best-featured global networks in this field of astronomy. We review on the historical progress, design concept, associated technology, and a wealth of scientific achievements powered by the VSNET.

arXiv comment57 pages, 21 figures, to appear in PASJ (special issue on VSNET), for more information and a full resolution version, see http://www.kusastro.kyoto-u.ac.jp/vsnet/

References in corpus (200)

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• Discovery of the peculiar supernova 1998bw in the error box of GRB980425
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• The Properties of X-Ray and Optical Light Curves of X-Ray Novae
• Predictions for The Very Early Afterglow and The Optical Flash
• A Wide Symbiotic Channel to Type Ia Supernovae
• A catalogue of symbiotic stars
• Evidence for a Spectroscopic Sequence Among SNe Ia
• GRB990123, The Optical Flash and The Fireball Model
• Optical Observations of GRO J1655-40 in Quiescence I: A Precise Mass for the Black Hole Primary
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• A dusty pinwheel nebula around the massive star WR 104
• A Catalog and Atlas of Cataclysmic Variables - The Living Edition
• A New Evolutionary Path to Type Ia Supernovae: Helium-Rich Super-Soft X-Ray Source Channel
• An energetic stellar outburst accompanied by circumstellar light echoes
• A Black Hole in the Superluminal source SAX J1819.3-2525 (V4641 Sgr)
• The afterglow of GRB 021004: surfing on density waves
• Brown Dwarfs and the Cataclysmic Variable Period Minimum
• The Peculiar Type Ic Supernova 1997ef: Another Hypernova
• The WEBT BL Lac Campaign 2000
• The mysterious eruption of V838 Mon
• Main-sequence stellar eruption model for V838 Mon
• The 2001 Superoutburst of WZ Sagittae
• GRB 021004: Reverse Shock Emission
• The X-ray transient XTE J1118+480: Multiwavelength observations of a low-state mini-outburst
• A Theoretical Light-Curve Model for the 1999 Outburst of U Scorpii
• Variability in GRB Afterglows and GRB 021004
• Early humps in WZ Sge stars
• A multi-epoch spectrophotometric atlas of symbiotic stars
• 1RXS J232953.9+062814: A Dwarf Nova with a 64-minute Orbital Period and a Conspicuous Secondary Star
• Super-Eddington outburst of V4641 Sgr
• Dwarf Nova Oscillations and Quasi-Periodic Oscillations in Cataclysmic Variables: II. A Low Inertia Magnetic Accretor Model
• Helium Emission in the Type Ic SN 1999cq
• HV Virginis and WZ Sge-Type Dwarf Novae
• The evolutionary time scale of Sakurai's object: A test of convection theory?
• Optical Spectropolarimetry of SN 2002ap: High Velocity Asymmetric Explosion
• Is evidence for enhanced mass transfer during dwarf-nova outbursts well substantiated?
• Simulations of superhumps and superoutbursts
• Blunting the Spike: the CV Minimum Period
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• GRB 021004: a Massive Progenitor Star Surrounded by Shells
• High-Resolution Spectroscopy of the Yellow Hypergiant Rho Cassiopeiae from 1993 Through the Outburst of 2000-2001
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• Infrared Properties of Cataclysmic Variables from 2MASS: Results from the 2nd Incremental Data Release
• First detection of the growing humps at the rapidly rising stage of dwarf novae AL Com and WZ Sge
• The peculiar variable V838 Mon
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• RX J0513.9-6951: The first example of accretion wind evolution, a key evolutionary process to Type Ia supernovae
• The post-outburst photometric behaviour of V838 Mon
• The Dwarf Novae of Shortest Period
• BL Lacertae: complex spectral variability and rapid synchrotron flare detected with BeppoSAX
• Discovery of a Magnetic White Dwarf in the Symbiotic Binary Z Andromedae
• A Model for the Quiescent Phase of the Recurrent Nova U Scorpii
• On the Origin of Early Superhumps in WZ Sge-Type Stars
• On Echo Outbursts and ER UMa Supercycles in SU UMa-type Cataclysmic Variables
• The rise and fall of V4334 Sgr (Sakurai's Object)
• A 6.3-h superhump in the cataclysmic variable TV Columbae: the longest yet seen
• Smoothed Particle Hydrodynamics Simulations of Apsidal and Nodal Superhumps
• The evolution of the Mira variable R Hydrae
• Repetitive rebrightening of EG Cancri: evidence for viscosity decay in the quiescent disk?
• A limit cycle model for long-term optical variations of V Sagittae: The second example of accretion wind evolution
• QZ Serpentis: A Dwarf Nova with a 2-Hour Orbital Period and an Anomalously Hot, Bright Secondary Star
• Structure in the early afterglow lightcurve of the gamma-ray burst of 29 March 2003
• Early-Phase Spectra of "Hypernova" SN 2002ap
• A new clue to the transition mechanism between optical high and low states of the supersoft X-ray source RX J0513.9-6951, implied from the recurrent nova CI Aquilae 2000 outburst model
• A model for WZ Sge with "standard" values of alpha
• High-Dispersion Spectroscopy of the X-Ray Transient RXTE J0421+560 (= CI Cam) during Outburst
• Outbursts of EX Hydrae: mass-transfer events or disc instabilities?
• Spiral Structure in WZ Sagittae around the 2001 Outburst Maximum
• HST and ground-based eclipse observations of V2051 Ophiuchi: Binary parameters
• Spectroscopic observations of the candidate sgB[e]/X-ray binary CI Cam
• Superoutbursts, superhumps and the tidal-thermal instability model
• CK Vul as a Candidate Eruptive Stellar Merging Event
• Superhumps and Repetitive Rebrightenings of the WZ Sge-Type Dwarf Nova, EG Cancri
• The light curve of the semiregular variable L2 Puppis: I. A recent dimming event from dust
• Evidence for Orbital Decay of RX J1914.4+2456: Gravitational Radiation and the Nature of the X-ray Emission
• Wind-Interaction Models for the Early Afterglows of Gamma-Ray Bursts: The Case of GRB 021004
• XMM-Newton observations of the spiral galaxy M74 (NGC 628)
• Properties of discontinuous and nova-amplified mass transfer in CVs
• Spectroscopic and Spectropolarimetric Observations of V838 Mon
• Emission line oscillations in the dwarf nova V2051 Ophiuchi
• Prediction of supersoft X-ray phase, helium enrichment, and turn-off time in recurrent nova CI Aquilae 2000 outburst
• Spectral atlas of dwarf novae in outburst
• 1998 Superoutburst of the Large-Amplitude SU UMa-Type Dwarf Nova WX Ceti
• Discovery of a Dwarf Nova Breaking the Standard Sequence of Compact Binary Evolution
• High-speed energy-resolved STJ photometry of the eclipsing dwarf nova IY UMa
• Spectroscopic Discovery of Brown Dwarf-like Secondary Stars in the Cataclysmic Variables LL And and EF Eri
• On the evidence for brown-dwarf secondary stars in cataclysmic variables
• On the nature of XTE J0421+560/CI Cam
• Changes in the structure of the accretion disc of EX Draconis through the outburst cycle
• Distortion of secondaries in semi-detached binaries and the cataclysmic variable period minimum
• Solving the kilo-second QPO problem of the intermediate polar GK Persei
• V4641Sgr - Super-Eddington source enshrouded by an extended envelope
• Eclipse maps of spiral shocks in the accretion disc of IP Pegasi in outburst
• Late superhumps and the stream-disc impact in IY UMa
• WZ Sge: FUSE Spectroscopy of the 2001 Outburst
• The minimum period problem in cataclysmic variables
• Superhumps in the Rarely Outbursting SU UMa-Type Dwarf Nova, HO Delphini
• The origin of the rebrightening in soft X-ray transient outbursts
• The 2000 outburst of the recurrent nova CI Aquilae: optical spectroscopy
• Correlated X-ray and optical variability in KV UMa
• The ``Outside-In'' Outburst of HT Cassiopeiae
• Period-doubling events in the light curve of R Cygni: evidence for chaotic behaviour
• Superhumps in a Peculiar SU UMa-Type Dwarf Nova ER Ursae Majoris
• Spectroscopy and Component Masses of the Eclipsing Dwarf Nova HS0907+1902
• Dwarf Nova-like Outburst of Short Period Intermediate Polar HT Camelopardalis
• Dramatic Changes in the Outburst Properties in V503 Cygni
• BZ Cam during its 1999/2000 optical low state
• Nova-induced mass transfer variations
• A search for brown-dwarf like secondaries in cataclysmic variables
• The Earliest Optical Observations of GRB 030329
• The new AM CVn star in Hydra
• ST/STIS Spectroscopy of the White Dwarfs in the Short-Period Dwarf Novae LL And and EF Peg
• Photometric Study of KR Aurigae during the High State in 2001
• Discovery of a short plateau phase in the early evolution of a gamma-ray burst afterglow
• The yellow hypergiants HR 8752 and rho Cassiopeiae near the evolutionary border of instability
• COMPTEL upper limits for the 56Co gamma-ray emission from SN1998bu
• Rapid Oscillations in Cataclysmic Variables. XV. HT Camelopardalis (= RX J0757.0+6306)
• In-the-Gap SU UMa-Type Dwarf Nova, Var73 Dra with a Supercycle of about 60 Days
• Modelling the Recurrent Nova CI Aql in Quiescence
• A High-resolution Spectrum of the R CrB Star V2552 Ophiuchi
• Superhumps in Cataclysmic Binaries. XXII. 1RXS J232953.9+062814
• The 2001 Superoutburst of WZ Sagittae: A Clue to the Dynamics of Accretion Disks
• High spectral resolution time-resolved optical spectroscopy of V893 Sco
• Eccentric discs in binaries with intermediate mass ratios: Superhumps in the VY Sculptoris stars
• Discovery of a cataclysmic variable with a sub-stellar companion
• Five Dwarf Novae with Orbital Periods Below Two Hours
• The minimum orbital period in thermal-timescale mass transfer
• Spectral mapping of the spiral structures in IP Pegasi on the decline from an outburst
• Period change of Superhumps in the WZ Sge-Type Dwarf Nova, HV Virginis
• Two X-Ray Bright Cataclysmic Variables with Unusual Activities: GZ Cnc and NSV 10934
• Photometry of the 1991 Superoutburst of EF Pegasi: Super-Quasi-Periodic Oscillations with Rapidly Decaying Periods
• Physical Parameter Eclipse Mapping of the quiescent disc in V2051 Ophiuchi
• V803 Centauri: Helium Dwarf Nova Mimicking a WZ Sge-Type Superoutburst
• Rapid Optical Fluctuations in the Black Hole Binary, V4641 Sgr
• Discovery of the eclipse in the symbiotic binary Z Andromedae
• FS Aur - a new class of Cataclysmic Variables or the missing link between Intermediate Polars and SW Sex objects?
• Photometric study of new southern SU UMa-type dwarf novae and candidates: V877 Ara, KK Tel and PU CMa
• Time-Resolved Photometry of GK Per during the 1996 Outburst
• Mapping quasi-periodic oscillations from the outbursting intermediate polar GK Persei
• Chandra observations of the recurrent nova CI Aql after its April 2000 outburst
• The He-shell flash in action: T Ursae Minoris revisited
• 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
• V1494 Aql: Eclipsing Fast Nova with an Unusual Orbital Light Curve
• Outburst and Post-Outburst Active Phase of the Black Hole X-ray Binary V4641 Sgr in 2002
• High-speed photometry of the Recurrent Nova IM Normae
• Discovery of a New Deeply Eclipsing SU UMa-Type Dwarf Nova, IY UMa (= TmzV85)
• Dramatic Spectral Evolution of WZ Sagittae during the 2001 Superoutburst
• Recurrent Nova IM Normae
• Discovery of 15-second oscillations in Hubble Space Telescope observations of WZ Sagittae following the 2001 outburst
• GZ Cancri: a cataclysmic variable at the lower edge of the period gap
• WZ Sge-Type Star V592 Herculis
• The Recurrent Nova U Scorpii in the 1999 Outburst: the First Detection of a Significant Orbital-Period Change
• Photometric Observations of an SU UMa-type Dwarf Nova VW Coronae Borealis during Outbursts
• Changing Supercycle of the ER UMa-Type Star V1159 Ori
• The October 1985 Long Outburst of U Geminorum: Revealing the Viscous Time Scale in Long Orbital Period Dwarf Novae
• The SU UMa Nature of the Dwarf Nova, DM Lyrae
• V463 Scuti (Nova Sct 2000): Rapidly Evolving Nova with a Prominent Premaximum Halt
• The 1996-1997 Fading of V651 Mon, the Binary Central Star of the Planetary Nebula NGC 2346
• Numerical simulation of accretion discs in close binary systems and discovery of spiral shocks
• Outburst Photometry of the Eclipsing Dwarf Nova GY Cancri
• Superhump-like variation during the anomalous state of SU UMa
• Photometric study of southern SU UMa-type dwarf novae and candidates -- III: NSV 10934, MM Sco, AB Nor, CAL 86
• Time-resolved, multi-color photometry and spectroscopy of Virgo 4 (OU Vir): a high orbital inclination, short orbital period dwarf nova
• V344 Lyr: an unusual large-amplitude SU UMa-type dwarf nova with a short supercycle
• A New SU UMa-Type Dwarf Nova, QW Serpentis (= TmzV46)
• CVcat: an interactive database on cataclysmic variables
• Spectroscopic Observations of Twenty-one Faint Cataclysmic Variables Candidates
• The Infrared Counterpart of the X-Ray Nova XTE J1720-318
• On the secondary star of the cataclysmic variable 1RXS J094432.1+035738
• IR Com: Deeply Eclipsing Dwarf Nova Below the Period Gap -- A Twin of HT Cas?
• Unusual Phase Reversal of Superhumps in ER Ursae Majoris
• A `superoutburst' in XTE J1118+480
• A spiral structure in the disk of EX Draconis on the rise to outburst maximum
• Temperature determination via STJ optical spectroscopy
• V2051 Oph's disc evolution on decline from superoutburst
• Large-Amplitude 2.65-d Oscillation in the VY Scl-Type star V425 Cas
• Discovery of Extremely Large-Amplitude Quasi-Periodic Photometric Variability in WC9-Type Wolf-Rayet Binary, WR 104
• Curious Variables Experiment (CURVE). CCD Photometry of QW Serpentis in Superoutburst and Quiescence
• The spectrum of V4334 Sgr (Sakurai's object) in August, 1998
• Observations of the Magnetic Cataclysmic Variable VV Puppis with the Far Ultraviolet Spectroscopic Explorer
• The Nature of V359 Centauri Revealed: New Long-Period SU UMa-Type Dwarf Nova
• V751 Cyg and V Sge as transient supersoft X-ray sources
• The Newly Active R Coronae Borealis Star, V2552 Oph
• Helical Tomography of an Accretion Disk by Superhump Light Curves of the 2001 Outburst of WZ Sagittae
• 1993 Superoutburst of LL Andromedae
• Deep Transient Optical Fading in the WC9 Star WR 106
• Superhumps of CC Cancri Revisited
• The detection of the donor star in IY UMa
• Grazing Eclipsing Dwarf Nova CW Monocerotis: Dwarf Nova-Type Outburst in a Possible Intermediate Polar?
• CI Aquilae: a recurrent nova with an unusually long plateau phase
• On the Possibility of V4444 Sgr as a Recurrent Nova
• Detection of Short Fading Episodes in Two Dwarf Novae from VSNET Observations
• The Extended Deep Minimum and the Subsequent Brightening of RX And in 1996-1997
• A Next Generation High-speed Data Acquisition System for Multi-channel Infrared and Optical Photometry
• Unusual State in V Sagittae
• Emission-Line Eclipse Mapping of Velocity Fields in Dwarf-Nova Accretion Disk

Cited by in corpus (85)

• Superhumps in Cataclysmic Binaries. XXV. q_crit, epsilon(q), and Mass-Radius
• Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae
• An Optical View of BL Lacertae Objects
• WZ Sge-Type Dwarf Novae
• Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. II: The Second Year (2009-2010)
• Repetitive Patterns in Rapid Optical Variations in the Nearby Black-hole Binary V404 Cygni
• New Method to Estimate Binary Mass Ratios by Using Superhumps
• The quest for companions to post-common envelope binaries: III. A reexamination of HW Virginis
• Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. IV: The Fourth Year (2011-2012)
• Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. III: The Third Year (2010--2011)
• Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. V: The Fifth Year (2012-2013)
• Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. VII: The Seventh Year (2014-2015)
• Systematic Serendipity: A Test of Unsupervised Machine Learning as a Method for Anomaly Detection
• Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. VI: The Sixth Year (2013-2014)
• Superhumps and Repetitive Rebrightenings of the WZ Sge-Type Dwarf Nova, EG Cancri
• Period Analysis using the Least Absolute Shrinkage and Selection Operator (Lasso)
• Hunting For Eclipses: High Speed Observations of Cataclysmic Variables
• Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. VIII: The Eighth Year (2015-2016)
• Discovery of a new dwarf nova, TSS J022216.4+412259.9: WZ Sge-type dwarf novae breaking the shortest superhump period record
• Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. IX: The Ninth Year (2016-2017)
• Spectroscopic and Photometric Periods of Six Ultracompact Accreting Binaries
• Late Superhumps in WZ Sge-Type Dwarf Novae
• Spectroscopic monitoring of the transition phase in nova V4745 Sgr
• X-ray observations of VY Scl type nova-like binaries in the high and low state
• On the Rebrightenings of Classical Novae during the Early Phase
• Study of Negative and Positive Superhumps in ER Ursae Majoris
• V1006 Cygni: Dwarf Nova Showing Three Types of Outbursts and Simulating Some Features of the WZ Sge-Type Behavior
• A New Sub-Period-Minimum CV with Partial Hydrogen Depletion and Evidence of Spiral Disk Structure
• Spectral Evolution of the Unusual Slow Nova V5558 Sgr
• Analysis of a Kepler Light Curve of the Novalike Cataclysmic Variable KIC 8751494
• V803 Centauri: Helium Dwarf Nova Mimicking a WZ Sge-Type Superoutburst
• The 2003/2004 superoutburst of SDSS J013701.06-091234.9
• Spectroscopic Observations of the WZ Sge-Type Dwarf Nova GW Librae during the 2007 Superoutburst
• V4140 Sgr: a short period dwarf nova with a peculiar behavior
• Superoutburst of SDSS J090221.35+381941.9: First Measurement of Mass Ratio in an AM CVn-Type Object using Growing Superhumps
• Dramatic Spectral Evolution of WZ Sagittae during the 2001 Superoutburst
• V1494 Aql: Eclipsing Fast Nova with an Unusual Orbital Light Curve
• First Detection of Two Superoutbursts during Rebrightening Phase of a WZ Sge-type Dwarf Nova: TCP J21040470+4631129
• Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae. X: The Tenth Year (2017)
• Unexpected Superoutburst and Rebrightening of AL Comae Berenices in 2015
• Comparison between the first and second mass eruptions from progenitors of Type IIn supernovae
• Dwarf Novae in the Shortest Orbital Period Regime: II. WZ Sge Stars as the Missing Population near the Period Minimum
• Variable classification in the LSST era: Exploring a model for quasi-periodic light curves
• Photometric Observations of an SU UMa-type Dwarf Nova VW Coronae Borealis during Outbursts
• Observation of the first gravitational microlensing event in a sparse stellar field : the Tago event
• Long-term monitoring of the short period SU UMa-type dwarf nova, V844 Herculis
• Superoutburst of CR Bootis: Estimation of Mass Ratio of a typical AM CVn star by Stage A Superhumps
• BO Ceti: Dwarf Nova Showing Both IW And and SU UMa-Type Features
• Characterization of Dwarf Novae Using SDSS Colors
• The Peculiar 2004 Superoutburst in the Helium Dwarf Nova, 2003aw
• Rapid Optical Variations Correlated with X-rays in the 2015 Second Outburst of V404 Cygni (GS 2023$+$338)
• Early Spectroscopy of the 2010 Outburst of U Scorpii
• Detection of Change in Supercycles in ER Ursae Majoris
• A New SU UMa-Type Dwarf Nova, QW Serpentis (= TmzV46)
• Photometric Studies of a WZ Sge-Type Dwarf Nova Candidate, ASAS160048-4846.2
• ASASSN-18aan: An Eclipsing SU UMa-type Cataclysmic Variable with a 3.6-hour Orbital Period and a Late G-type Secondary Star
• Discovery of Standstills in the SU UMa-Type Dwarf Nova NY Serpentis
• NSV 1440: First WZ Sge-type Object in AM CVn stars and candidates
• IW And-Type State in IM Eridani
• RZ Leonis Minoris Bridging between ER Ursae Majoris-Type Dwarf Nova and Novalike System
• Discovery of a Promissing Candidate of WZ Sge-Type Dwarf Novae, ASAS 160048-4846.2: Evidence for Double-Peaked Humps
• Spectroscopic and Photometric Observations of Dwarf Nova Superoutbursts by the 3.8 m Telescope Seimei and the Variable Star Network
• On the optical counterparts of radio transients and variables
• 1993 Superoutburst of LL Andromedae
• Photometric Studies of New Southern SU UMa-type dwarf novae, FL Triangulum Australe and CTCV J0549-4921
• Understanding the extreme luminosity of DES14X2fna
• OAO/MITSuME Photometry of Dwarf Novae. II. HV Virginis and OT J012059.6+325545
• ASASSN-16eg: New candidate of long-period WZ Sge-type dwarf nova
• The 2005 July Superoutburst of the Dwarf Nova 2QZ J021927.9-304545: the SU UMa Nature Confirmed
• 2021 superoutburst of WZ Sge-type dwarf nova V627 Pegasi lacks an early superhump phase
• On the Possibility of V4444 Sgr as a Recurrent Nova
• OAO/MITSuME Photometry of Dwarf Novae. III. CSS130418:174033+414756
• Detection of Short Fading Episodes in Two Dwarf Novae from VSNET Observations
• Third Nearest WZ Sge-Type Dwarf Nova candidate ASASSN-14dx Classified on the Basis of Gaia Data Release 2
• PM J03338+3320: Long-Period Superhumps in Growing Phase Following a Separate Precursor Outburst
• Dwarf Novae in the Shortest Orbital Period Regime: I. A New Short Period Dwarf Nova, OT J055717+683226
• PNV J00444033+4113068: early superhumps with 0.7 mag amplitude and non-red color
• OAO/MITSuME Photometry of Dwarf Novae: I SU Ursae Majoris
• Unusual State in V Sagittae
• OT J002656.6+284933 (CSS101212:002657+284933): An SU UMa-Type Dwarf Nova with Longest Superhump Period
• On the Colour Variations of Negative Superhumps
• CS Indi: SU UMa-Type Dwarf Nova with Long Precursor Outburst
• Photometry of the eclipsing cataclysmic variable SDSS J152419.33+220920.0
• Detection of the Supercycle in V4140 Sagittarii: First Eclipsing ER Ursae Majoris-like Object
• Outburst Behaviour of the Dwarf Nova CG Draconis