Dwarf nova outbursts detected by ASAS-SN J/ApJ/910/120 ivo://CDS.VizieR/J/ApJ/910/120 doi:10.26093/cds/vizier.19100120 CDS Kawash A. Chomiuk L. Strader J. Aydi E. Sokolovsky K.V. Jayasinghe T.,Kochanek C.S. Schmeer P. Stanek K.Z. Mukai K. Shappee B. Way Z.,Basinger C. Holoien T.W.-S. Prieto J.L. 2025-08-20T20:08:26Z 2022-09-27T17:19:09Z CDS support team CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France cds-question@unistra.fr novae visible-astronomy broad-band-photometry surveys variable-stars The unprecedented sky coverage and observing cadence of the All-Sky Automated Survey for SuperNovae (ASAS-SN) has resulted in the discovery and continued monitoring of a large sample of Galactic transients. The vast majority of these are accretion-powered dwarf nova outbursts in cataclysmic variable systems, but a small subset are thermonuclear-powered classical novae. Despite improved monitoring of the Galaxy for novae from ASAS-SN and other surveys, the observed Galactic nova rate is still lower than predictions. One way classical novae could be missed is if they are confused with the much larger population of dwarf novae. Here, we examine the properties of 1617 dwarf nova outbursts detected by ASAS-SN and compare them to classical novae. We find that the mean classical nova brightens by ~11mag during outburst, while the mean dwarf nova brightens by only ~5mag, with the outburst amplitude distributions overlapping by roughly 15%. For the first time, we show that the amplitude of an outburst and the time it takes to decline by two magnitudes from maximum are positively correlated for dwarf nova outbursts. For classical novae, we find that these quantities are negatively correlated, but only weakly, compared to the strong anticorrelation of these quantities found in some previous work. We show that, even if located at large distances, only a small number of putative dwarf novae could be misclassified as classical novae, suggesting that there is minimal confusion between these populations. Future spectroscopic follow-up of these candidates can show whether any are indeed classical novae. 2021ApJ...910..120K https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/910/120 Catalog Research IsServedBy TAP VizieR generic service IsServedBy Conesearch service related-to B/vsx : AAVSO International Variable Star Index VSX (Watson+, 2006-2014) I/305 : The Guide Star Catalog, Version 2.3.2 (GSC2.3) (STScI, 2006) I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018) I/345 : Gaia DR2 (Gaia Collaboration, 2018) II/366 : ASAS-SN catalog of variable stars (Jayasinghe+, 2018-2020) I/353 : The Guide Star Catalog, Version 2.4.2 (GSC2.4.2) (STScI, 2020) J/ApJS/187/275 : Photometric histories of recurrent novae (Schaefer, 2010) J/AJ/140/34 : Classification of nova light curves (Strope+, 2010) J/PASJ/64/63 : Dwarf novae characterization using SDSS colors (Kato+, 2012) J/MNRAS/441/1186 : Cataclysmic variables from CRTS (Drake+, 2014) J/ApJ/788/164 : Known Galactic classical novae data (Pagnotta+, 2014) J/ApJ/788/48 : X-ray through NIR photometry of NGC 2617 (Shappee+, 2014) J/AcA/65/313 : One thousand new dwarf novae from OGLE Survey (Mroz+, 2015) J/MNRAS/456/4441 : Outburst catalog of cataclysmic variables (Coppejans+, 2016) J/ApJ/833/149 : Opt/NIR obs. of M31N 2008-12a 2015 eruption (Darnley+, 2016) J/MNRAS/460/2526 : Dwarf novae outbursts properties (Otulakowska-Hypka+, 2016) J/ApJ/834/196 : Galactic novae with m<=10 from 1900 to 2015 (Shafter, 2017) J/MNRAS/491/655 : Photometry and spectroscopy of RN LMC 1968 (Kuin+, 2020) http://asd.gsfc.nasa.gov/Koji.Mukai/novae/novae.html : List of Gal. novae http://www.astronomy.ohio-state.edu/asassn/ : ASAS-SN home page http://www.aavso.org/ : AAVSO home page https://cds.unistra.fr/vizier-org/licences_vizier.html https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/910/120 https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/910/120 http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/910/120 https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/910/120 https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/910/120 http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/910/120 GET text/xml+votable https://tapvizier.cds.unistra.fr/TAPVizieR/tap Cone search capability for table J/ApJ/910/120/table1 (Outburst properties of dwarf novae) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/910/120/table1? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/910/120/table1? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/910/120/table1? GET text/xml+votable 180.0 50000 true 36.2765417 8.1107222 0.005555555555555556 Cone search capability for table J/ApJ/910/120/table2 (Classical and rapid recurrent nova candidates) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/910/120/table2? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/910/120/table2? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/910/120/table2? GET text/xml+votable 180.0 50000 true 279.5916667 -9.7298333 0.005555555555555556 Cone search capability for table J/ApJ/910/120/table3 (Outburst properties of classical and recurrent novae) https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/910/120/table3? https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/910/120/table3? http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/910/120/table3? GET text/xml+votable 180.0 50000 true 70.8390417 47.3571944 0.005555555555555556 6/160 179 253 313 353 381 389 406 414 457 475 569 623 651 661 669 715 730 779 781 786 799 839 901 994-995 1002 1007 1171 1187 1242 1253 1280 1302 1360-1361 1402 1411 1475 1496 1504 1568 1639 1656 1703 1720 1725 1761 1807 1814 1840 1902 2035 2045 2074 2079 2089 2145 2153 2158 2163 2173 2211 2244 2248 2265 2274 2280 2286 2294 2309 2329 2335 2337 2357 2365 2372 2382 2385 2390 2395 2398 2405 2435 2440 2461 2474-2475 2487 2498 2507 2509 2522 2538 2540 2552 2575 2597 2607 2610 2661 2672 2674 2685 2702 2723 2731 2765 2785 2803 2854 2864 2882 2897 2899 2935 2940 2945 2947 2964 2968 2990 2998 3011 3035 3093 3116 3122 3151 3198 3220 3247 3259 3299 3309 3410 3421 3423 3445 3447 3476 3509 3521 3544 3567 3578 3588 3605 3725 3772 3784 3790 3828 3860 3874 3886 3908 3917 3923 3991 4013 4104 4123 4129 4157 4167 4195-4196 4271 4273 4294 4296 4341 4356 4437 4453 4479 4515 4603 4619 4622 4626 4653 4658 4667-4668 4678 4689 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48055 48059 48094 48098 48297 48339 48374 48422 48436 48439 48473 48495 48546 48573 48592 48607 48628 48630 48671 48673 48687 48713-48714 48728 48747 48769 48773 48776 48796 48803 48821 48823 48830 48840-48841 48849 48864 48873 48903 48928 48933 48973 49001 49004 49016 49026 49029 49041 49070 49094 49100 49104 49118 49120 49130 49135 https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/910/120?format=ascii Optical default J/ApJ/910/120/table1 Outburst properties of dwarf novae recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int Name Dwarf Novae Name meta.id;meta.main char RAJ2000 Hour of Right Ascension (J2000) pos.eq.ra;meta.main DEJ2000 Degree of Declination (J2000) pos.eq.dec;meta.main Peak [10/16.6] Peak apparent brightness mag phot.mag;em.opt float Amp [0.9/9.7] Amplitude of outburst mag phot.mag float f_Amp [0/1]? Amplitude flag (G1) meta.code int nullable SimbadName Simbad column added by the CDS meta.id char nullable t2 [0.7/211.4] Decline time (G2) d time.interval float f_t2 [0/1]? Flag on t2 (G3) meta.code int nullable b_t2 [0/71]? Lower bound on t2 (G4) d time.interval;stat.min float nullable B_t2 [0.9/212] Upper bound on t2 (G4) d time.interval;stat.max float ASASSN Display data from the ASAS-SN catalog of variable stars (II/366) within 3" meta.ref.url int nullable
J/ApJ/910/120/table2 Classical and rapid recurrent nova candidates Simbad Simbad column added by the CDS meta.ref.url char recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int Name Dwarf Novae Name meta.id;meta.main char RAJ2000 [9/18] Hour of Right Ascension (J2000) pos.eq.ra;meta.main DEJ2000 [9/59] Degree of Declination (J2000) pos.eq.dec;meta.main GLON Galactic longitude deg pos.galactic.lon GLAT Galactic latitude deg pos.galactic.lat float Peak [13.5/16.3] Peak g-band apparent brightness mag phot.mag;em.opt.B float l_Amp Limit flag on Amp meta.code.error char Amp [6.5/8.2]? Amplitude of outburst mag phot.mag float nullable b_t2 [5.9/14.2]? Lower bound on t2 d time.interval;stat.min float nullable B_t2 [7.9/32.9] Upper bound on t2 d time.interval;stat.max float Ag [1.4/19.8] Extinction at g-band (1) mag phys.absorption float l_tauR Limit flag on tauR meta.code.error char tauR [0.8/4.0] Outburst recurrence time yr time.interval float 10kpc [YN] As close as 10 kpc? meta.code char ASASSN Display data from the ASAS-SN catalog of variable stars (II/366) within 3" meta.ref.url int nullable
J/ApJ/910/120/table3 Outburst properties of classical and recurrent novae Simbad Simbad column added by the CDS meta.ref.url char recno Record number assigned by the VizieR team. Should Not be used for identification. meta.record int Name Dwarf Novae Name meta.id;meta.main char RAJ2000 Hour of Right Ascension (J2000) pos.eq.ra;meta.main DEJ2000 Degree of Declination (J2000) pos.eq.dec;meta.main Peak [4.4/16.8] Peak apparent brightness mag phot.mag;em.opt float Amp [5.8/14.4] Amplitude of outburst mag phot.mag float f_Amp [0/1]? Amplitude flag (G1) meta.code int nullable t2 [3.0/118.3] Decline time (G2) d time.interval float f_t2 [0/1]? Flag on t2 (G3) meta.code int nullable b_t2 [1/114.7]? Lower bound on t2 (G4) d time.interval;stat.min float nullable B_t2 [3.1/118.3] Upper bound on t2 (G4) d time.interval;stat.max float Flag Flag (1) meta.code.error char