- vsnet-outburst - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-outburst 31590] Outbursts 21/11/ 2025
by Rod Stubbings 22 Nov '25

22 Nov '25

Outbursts and selected activity. object YYMMDD(UT) mag code remarks CHAZ 251121.446 120 Stu.RASNZ active CHAST 251121.447 144 Stu.RASNZ active COLTV 251121.471 131 Stu.RASNZ outburst ERIAH 251121.469 144 Stu.RASNZ active ERILT 251121.468 157 Stu.RASNZ outburst ERIPS 251121.451 126 Stu.RASNZ outburst ORICN 251121.491 130 Stu.RASNZ active PAVGS 251121.464 148 Stu.RASNZ outburst PEGHX 251121.477 132 Stu.RASNZ active VOLSY 251121.449 144 Stu.RASNZ active ASASSN-14IK 251121.462 141 Stu.RASNZ active DDE 77 251121.457 138 Stu.RASNZ active SSS 100511:061754-362655 251121.473 146 Stu.RASNZ outburst CTCVJ1940-4724 251121.437 138 Stu.RASNZ outburst -- Rod Stubbings Tetoora Road Observatory Victoria, Australia Honorary Associate member Astronomical Society of Australia Telescope: "Infinity" 22" f/3.8 stubbo(a)dcsi.net.au http://rodstubbingsobservatory.wordpress.com/

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[vsnet-outburst 31578] TCP J05384230+7051377: new WZ Sge-type dwarf nova
by 保家大将 21 Nov '25

21 Nov '25

TCP J05384230+7051377: new WZ Sge-type dwarf nova We posted our spectroscopic follow-up result of TCP J05384230+7051377 to ATel. ATel #17485: Spectroscopic confirmation of TCP J05384230+7051377 as a WZ Sge-type dwarf nova <https://www.astronomerstelegram.org/?read=17485> We concluded that this object is a new WZ Sge-type dwarf nova because Hα has a narrow emission core and its spectrum shows a blue continuum with the Balmer and HeI absorption lines. Also, we estimated this object as p ~ 0.06d from Itoh-san's data. However p ~ 0.06d is a weak signal, so further observation will provide a more accurate estimate of the period. best regard, Hiromasa Hoke

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[vsnet-outburst 31588] Outbursts 20/11/2025
by Rod Stubbings 21 Nov '25

21 Nov '25

Outbursts and selected activity. object YYMMDD(UT) mag code remarks ARAV793 251120.451 151 Stu.RASNZ outburst CENV803 251120.703 139 Stu.RASNZ outburst CHAZ 251120.520 128 Stu.RASNZ outburst CHAST 251120.523 143 Stu.RASNZ active CMISV 251120.607 140 Stu.RASNZ active CNCAK 251120.689 130 Stu.RASNZ outburst ERIAH 251120.461 152 Stu.RASNZ outburst HYAV392 251120.672 148 Stu.RASNZ outburst HYIDR 251120.597 156 Stu.RASNZ outburst ORICN 251120.541 128 Stu.RASNZ outburst PEGHX 251120.474 132 Stu.RASNZ outburst PUPHO 251120.591 144 Stu.RASNZ active PYXVZ 251120.603 133 Stu.RASNZ outburst RETVX 251120.496 151 Stu.RASNZ active SGRV2276 251120.467 164 Stu.RASNZ outburst TRADV 251120.498 128 Stu.RASNZ outburst VOLSY 251120.517 144 Stu.RASNZ outburst ASASSN-14IK 251120.469 142 Stu.RASNZ outburst NSV 35 251120.528 154 Stu.RASNZ outburst DDE 77 251120.457 136 Stu.RASNZ outburst -- Rod Stubbings Tetoora Road Observatory Victoria, Australia Honorary Associate member Astronomical Society of Australia Telescope: "Infinity" 22" f/3.8 stubbo(a)dcsi.net.au http://rodstubbingsobservatory.wordpress.com/

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[vsnet-outburst 31586] Activity (2025-11-19)
by Hiroyuki Maehara 19 Nov '25

19 Nov '25

Visual magnitude estimates by VSOLJ members object YYYYMMDD(UT) mag code CASAM 20251119.520 127 Mhh.VSOLJ outburst CYGSS 20251119.491 98 Mhh.VSOLJ Observer: Hiroyuki Maehara (Okayama, Japan) Instruments: 30cmL

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[vsnet-outburst 31584] TCP J09370380+1657350: possible new superoutburst
by Kojiguchi 19 Nov '25

19 Nov '25

TCP J09370380+1657350: possible new superoutburst Gavin Ramsay reported that GOTO detected TCP J09370380+1657350 in outburst on 2025 Nov 18 03:41:50 UT (20251118.1534). Reported magnitude: L = 16.18 (400–700 nm). This object was previously identified as a WZ Sge-type system. For reference, see also the past report: [vsnet-alert 25216] TCP J09370380+1657350: new WZ Sge-type dwarf nova [vsnet-alert 25218] Spectrum of TCP J09370380+1657350 http://www.astronomerstelegram.org/?read=14309 https://vsx.aavso.org/index.php?view=detail.top&oid=2215274

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[vsnet-outburst 31582] TCP J21314718+3825463: new SU UMa-type dwarf nova
by tonny.vanmunster＠gmail.com 15 Nov '25

15 Nov '25

Dear colleagues, TCP J21314718+3825463 was discovered by XOSS (Xingming Observatory Sky Survey) on 2025 Nov 07.6 at mag 14.70C. The quiescent counterpart is a 22.5 g mag star, implying an outburst amplitude of ~8 mag. I have just completed the analysis of my unfiltered CCD observations of TCP J21314718+3825463, obtained on 2025 Nov 11/12 and Nov 14/15 at CBA Extremadura Observatory. The data were acquired under clear skies with a 0.40-m f/5.1 telescope and a Moravian G2-4000 CCD camera. The Nov 11/12 light curve did not reveal any obvious modulation. However, the Nov 14/15 light curve clearly shows regular superhump modulations with an amplitude of 0.23 mag. A period analysis performed with ANOVA, Lomb-Scargle, Generalized-Lomb-Scargle and PDM methods (Peranso 3.1) yields a combined superhump period of 0.0567 +/- 0.0016d. The object was measured at mag CV = 16.0 on Nov 15th. Image calibration and photometry were carried out using the latest release of Phoranso, which enabled simultaneous photometry of several additional variable stars in the same field of view. These results establish TCP J21314718+3825463 as a new SU UMa-type dwarf nova. Further follow-up observations are strongly encouraged to refine the superhump period and study its evolution. I will submit my observations to AAVSO, CBA and VSNET for further analysis. With kind regards, Tonny --- Tonny Vanmunster CBA Belgium Observatory CBA Extremadura Observatory http://www.cbabelgium.co <http://www.cbabelgium.com/> m PERANSO : The Light Curve and Period Analysis Software http://www.peranso.co <http://www.peranso.com/> m PHORANSO: Photometric Reduction and Analysis Software http://www.phoranso.com <http://www.phoranso.com/>

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[vsnet-outburst 31581] Outbursts 12/11/2025
by Rod Stubbings 13 Nov '25

13 Nov '25

Outbursts and selected activity object YYMMDD(UT) mag code remarks ARAAT 251112.474 142 Stu.RASNZ active CHAST 251112.528 143 Stu.RASNZ active CMADM 251112.579 142 Stu.RASNZ active CMAHL 251112.578 119 Stu.RASNZ active CRABP 251112.457 143 Stu.RASNZ active ERILT 251112.516 153 Stu.RASNZ active ERIPS 251112.451 129 Stu.RASNZ active NORHP 251112.435 146 Stu.RASNZ active OCTAA 251112.524 148 Stu.RASNZ outburst ORICZ 251112.597 126 Stu.RASNZ active ORIV1159 251112.571 144 Stu.RASNZ active PUPBV 251112.591 143 Stu.RASNZ active PUPBX 251112.590 150 Stu.RASNZ active PUPCL 251112.592 142 Stu.RASNZ active PUPHO 251112.595 139 Stu.RASNZ active RETVAR2005 251112.487 132 Stu.RASNZ outburst RETVX 251112.487 141 Stu.RASNZ active SGRV729 251112.460 146 Stu.RASNZ active SGRV730 251112.459 142 Stu.RASNZ active TUCVW 251112.521 157 Stu.RASNZ active ASASSN-14CF 251112.522 153 Stu.RASNZ active NSV 11274 251112.455 140 Stu.RASNZ active DDE 77 251112.452 140 Stu.RASNZ active -- Rod Stubbings Tetoora Road Observatory Victoria, Australia Honorary Associate member Astronomical Society of Australia Telescope: "Infinity" 22" f/3.8 stubbo(a)dcsi.net.au http://rodstubbingsobservatory.wordpress.com/

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[vsnet-outburst 31580] Outbursts 11/11/25
by Rod Stubbings 12 Nov '25

12 Nov '25

Outbursts and selected activity. object YYMMDD(UT) mag code remarks ARAAT 251111.462 142 Stu.RASNZ active CHAST 251111.508 142 Stu.RASNZ active CMADM 251111.582 142 Stu.RASNZ outburst CMAHL 251111.581 119 Stu.RASNZ active CRABP 251111.464 142 Stu.RASNZ outburst ERILT 251111.528 153 Stu.RASNZ outburst ERIPS 251111.428 128 Stu.RASNZ outburst HYAAG 251111.674 153 Stu.RASNZ outburst NORHP 251111.439 146 Stu.RASNZ outburst ORICZ 251111.669 146 Stu.RASNZ outburst ORIV1159 251111.569 144 Stu.RASNZ outburst PAVGS 251111.533 154 Stu.RASNZ outburst PUPBV 251111.589 141 Stu.RASNZ outburst PUPBX 251111.588 149 Stu.RASNZ outburst PUPCL 251111.590 142 Stu.RASNZ outburst PUPHO 251111.656 139 Stu.RASNZ active RETVX 251111.433 141 Stu.RASNZ active SGRV729 251111.448 144 Stu.RASNZ outburst SGRV730 251111.447 141 Stu.RASNZ outburst TUCVW 251111.540 156 Stu.RASNZ outburst VELV383 251111.665 155 Stu.RASNZ outburst ASASSN-14CF 251111.540 153 Stu.RASNZ active NSV 11274 251111.453 139 Stu.RASNZ outburst DDE 76 251111.485 156 Stu.RASNZ outburst DDE 77 251111.430 138 Stu.RASNZ outburst -- Rod Stubbings Tetoora Road Observatory Victoria, Australia Honorary Associate member Astronomical Society of Australia Telescope: "Infinity" 22" f/3.8 stubbo(a)dcsi.net.au http://rodstubbingsobservatory.wordpress.com/

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[vsnet-outburst 31579] TCP J00534786+1617214: new SU UMa-type dwarf nova
by tonny.vanmunster＠gmail.com 10 Nov '25

10 Nov '25

Dear colleagues, TCP J00534786+1617214 (aka ASASSN-25ei) was discovered by Y. Nakamura, Japan on 2025 Nov 1.5 at mag 14.4 U. The quiescent counterpart is a 22.0 g mag star, implying an outburst amplitude of ~7.6 mag. I have just completed the analysis of my unfiltered CCD observations of TCP J00534786+1617214, obtained on 2025 Nov 08/09 at CBA Belgium Observatory. The data were acquired under clear skies with a 0.40-m f/10.0 telescope and a QHY-268M CMOS camera under clear skies. The light curve clearly exhibits regular superhump modulations with an amplitude of 0.19 mag. Period analysis with ANOVA, Lomb-Scargle, Generalized-Lomb-Scargle and PDM methods (Peranso 3.1) yields a combined superhump period of 0.0624 +/- 0.0010d. The object was measured at mag CV = 15.5 on Nov 08th. Image calibration and photometry were performed with the latest release of Phoranso. These results establish TCP J00534786+1617214 as a new SU UMa-type dwarf nova. Follow-up observations are encouraged. I will submit my observations to AAVSO, CBA and VSNET for further analysis. With kind regards, Tonny --- Tonny Vanmunster CBA Belgium Observatory CBA Extremadura Observatory http://www.cbabelgium.co <http://www.cbabelgium.com/> m PERANSO : The Light Curve and Period Analysis Software http://www.peranso.co <http://www.peranso.com/> m PHORANSO: Photometric Reduction and Analysis Software http://www.phoranso.com <http://www.phoranso.com/>

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[vsnet-outburst 31575] 1eRASS J072044.9-402838 = PNV J07204545-4028357 = ASASSN-25ee: new SU UMa-type dwarf nova, likely WZ Sge-type
by Yusuke Tampo 05 Nov '25

05 Nov '25

1eRASS J072044.9-402838 = PNV J07204545-4028357 = ASASSN-25ee: new SU UMa-type dwarf nova, likely WZ Sge-type 1eRASS J072044.9-402838 was originally identified as a CV candidate in Rodriguez et al. (2025), G = 19.2 mag at ~267 pc, hence its absolute magnitude of ~12 mag. https://vsx.aavso.org/index.php?view=detail.top&oid=10868116 https://ui.adsabs.harvard.edu/abs/2025PASP..137a4201R/abstract ASASSN and John Seach discovered its 2025 outburst, peaking at ~11.0 mag around 20th October. https://www.astronomy.ohio-state.edu/asassn/transients.html http://www.cbat.eps.harvard.edu/unconf/followups/J07204545-4028357.html We, the SAAO team, obtained the time-resolved photometries and a snapshot spectrum of 1eRASS J072044.9-402838 on 3rd Nov. The light curve shows likely superhumps with a rough period of ~0.059 d. The spectrum shows Balmer absorption lines from the accretion disk and a superposed narrow emission component in Hα. Hence, 1eRASS J072044.9-402838 is now confirmed as (at least) a SU UMa-type dwarf nova, and probably a WZ Sge-type dwarf nova, considering its large outburst amplitude, long outburst duration, and short superhump period. Further time-resolved observations are encouraged to establish its superhump period and changes. Best regards, Yusuke -- ---------------------------------------------- South African Astronomical Observatory, Postdoc fellow Yusuke TAMPO / 反保雄介 EMAIL: tampo(a)kusastro.kyoto-u.ac.jp ALT. EMAIL: yusuke(a)saao.ac.za ----------------------------------------------

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