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

[vsnet-outburst 31689] Outbursts 17/07/2026
by Rod Stubbings 17 Jul '26

17 Jul '26

Outbursts on 17/07/2026 object YYMMDD(UT) mag code remarks AQLV1141 260717.571 159 Stu.RASNZ outburst AQREG 260717.592 130 Stu.RASNZ outburst ARAAT 260717.389 132 Stu.RASNZ outburst ARAV793 260717.379 153 Stu.RASNZ outburst CAROQ 260717.401 145 Stu.RASNZ outburst CENMU 260717.443 132 Stu.RASNZ outburst CENNN 260717.448 142 Stu.RASNZ outburst CRABP 260717.441 140 Stu.RASNZ outburst ERICK 260717.599 140 Stu.RASNZ outburst ERIPS 260717.635 126 Stu.RASNZ outburst HYAAG 260717.363 144 Stu.RASNZ outburst PAVGS 260717.451 150 Stu.RASNZ outburst PSATY 260717.594 137 Stu.RASNZ outburst SERRY 260717.437 137 Stu.RASNZ outburst TUCVW 260717.463 158 Stu.RASNZ outburst ASASSN-14IK 260717.460 142 Stu.RASNZ outburst ASASSN-14JE 260717.375 146 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 31688] AT2026ryu: new SU UMa-type dwarf nova, likely WZ Sge-type
by Yusuke Tampo 15 Jul '26

15 Jul '26

AT2026ryu: new SU UMa-type dwarf nova, likely WZ Sge-type Rui Min et al discovered AT2026ryu at 14.98 mag on 2026-07-06 15:01:24 UTC. The outburst amplitude is ~8 mag. ZTF also discovered this object as ZTF26abeziup. https://www.wis-tns.org/object/2026ryu https://vsx.aavso.org/index.php?view=detail.top&oid=10875920 Lesedi telescope at SAAO and Itoh-san have reported the time-resolved observations of AT2026ryu. The most recent observations on 14 July with Lesedi show ordinary superhumps with a period of ~0.0571 d. No clear modulations are present in the data on 6 and 7 July. Thus AT 2026ryu is a new SU UMa-type dwarf nova. Given its large outburst amplitude and long waiting time before the emergence of ordinary superhumps, AT 2026ryu is likely a WZ Sge-type dwarf nova. Time-resolved observations are encouraged to improve the period determination. 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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[vsnet-outburst 31687] ASASSN-26ea: new SU UMa-type dwarf nova, likely WZ Sge-type
by Yusuke Tampo 14 Jul '26

14 Jul '26

ASASSN-26ea: new SU UMa-type dwarf nova ASASSN-26ea was discovered by ASASSN on 2026-07-5.07 at 16.67 mag. The time-resolved observations by Sjoerd Dufoer show ordinary superhumps with a period of ~0.058 d (other aliases possible). Thus ASASSN-26ea is a new SU UMa-type dwarf nova. Considering its large outburst amplitude (~8 mag according to the VSX) and short superhump period, ASASSN-26ea can be a WZ Sge-type dwarf nova. https://vsx.aavso.org/index.php?view=detail.top&oid=10875918 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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[vsnet-outburst 31686] ASASSN-26dv: new SU UMa-type dwarf nova and a candidate period bouncer
by Yusuke Tampo 14 Jul '26

14 Jul '26

ASASSN-26dv: new SU UMa-type dwarf nova and a candidate period bouncer ASASSN-26dv was discovered by ASASSN on 2026-06-23.03 UT at 14.62 mag. After the initial decline, ATLAS and ASASSN light curves showed a short dip around 2026-07-05 UT. https://vsx.aavso.org/index.php?view=detail.top&oid=10875895 The time-resolved observations after this dip by Berto Monard show likely positive superhumps, with a period of ~0.055 d. Thus, ASASSN-26dv is a new SU UMa-type dwarf nova with a possible dip in the outburst plateau, which is often seen in outbursts in period bouncers. Further time-resolved observations are encouraged to establish its superhump period. 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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[vsnet-outburst 31685] TCP J02191736+2857158: a WZ Sge-type dwarf nova
by Keisuke Isogai 12 Jul '26

12 Jul '26

TCP J02191736+2857158: a WZ Sge-type dwarf nova I posted the ATel: https://www.astronomerstelegram.org/?read=17887 The spectral features and the large amplitude of ~8.5 mag suggest that this object is a new WZ Sge-type object.

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[vsnet-outburst 31683] GK Per: outburst
by Keisuke Isogai 11 Jul '26

11 Jul '26

> Date: Sat, 11 Jul 2026 10:49:32 +0100 > From: "Bob Dryden via groups.io" <bobdryden=ntlworld.com(a)groups.io> > To: baavss-alert(a)groups.io > Subject: Re: [baavss-alert] GK Per > > Can any one confirm GK Per is slightly brighter than usual? > I had it at 12.6 this morning (11th July) > > Bob Dryden We observed GK Per about one hour earlier. The brightness was g~12.05. The object will be undergoing an outburst. I do not have posting privileges for baavss-alert, so I am posting here instead. I apologize for the inconvenience.

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[vsnet-outburst 31682] Activity (2026-07-10)
by Hiroyuki Maehara 10 Jul '26

10 Jul '26

Visual magnitude estimates by VSOLJ members object YYYYMMDD(UT) mag code CYGSS 20260710.586 106 Mhh.VSOLJ HERAH 20260710.553 121 Mhh.VSOLJ Observer: Hiroyuki Maehara (Okayama, Japan) Instruments: 30cmL

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[vsnet-outburst 31681] Outbursts 8/07/2026
by Rod Stubbings 08 Jul '26

08 Jul '26

Outbursts 8/07/2026 object YYMMDD(UT) mag code remarks CENV342 260708.439 142 Stu.RASNZ outburst CENV442 260708.440 120 Stu.RASNZ outburst HYAV392 260708.396 148 Stu.RASNZ outburst INDTU 260708.460 153 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 31680] Outbursts 6/07/2026
by Rod Stubbings 06 Jul '26

06 Jul '26

Outbursts 6/07/2026 object YYMMDD(UT) mag code remarks CENV485 260706.531 154 Stu.RASNZ outburst HYIWX 260706.583 118 Stu.RASNZ outburst MENAD 260706.360 148 Stu.RASNZ outburst PICAR 260706.353 140 Stu.RASNZ outburst SCODV 260706.387 146 Stu.RASNZ outburst SCOV598 260706.386 153 Stu.RASNZ outburst VELV383 260706.459 142 Stu.RASNZ outburst DDE 76 260706.354 148 Stu.RASNZ outburst MASTER OT J142023.47-485540.0 260706.572 130 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 31679] Activity (2026-07-02)
by Hiroyuki Maehara 02 Jul '26

02 Jul '26

Visual magnitude estimates by VSOLJ members object YYYYMMDD(UT) mag code AT2026rdg 20260702.524 122 Mhh.VSOLJ CYGSS 20260702.526 84 Mhh.VSOLJ HERAH 20260702.535 125 Mhh.VSOLJ Observer: Hiroyuki Maehara (Okayama, Japan) Instruments: 30cmL

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