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

[vsnet-outburst 31702] Outbursts 20/08/2026
by Rod Stubbings 21 Aug '26

21 Aug '26

Outbursts 20/08/2026 object YYMMDD(UT) mag code remarks ERILT 260820.719 155 Stu.RASNZ outburst PAVGS 260820.696 155 Stu.RASNZ outburst NSV 11274 260820.695 155 Stu.RASNZ outburst SSS 100511:061754-362655 260820.729 153 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/

1 0

[vsnet-outburst 31700] MAXI J1750-327: X-ray nova outburst
by Keisuke Isogai 17 Aug '26

17 Aug '26

MAXI J1750-327: X-ray nova outburst According to ATels, the X-ray nova MAXI J1750-327, a possible black hole binary, is undergoing an outburst. An optical counterpart has also been detected in outburst. https://www.astronomerstelegram.org/?read=17963 https://www.astronomerstelegram.org/?read=17974 The following ATel reports the magnitudes of g ~ 18.3 and i ~ 16.3 on Aug 14. And the coordinates are 17:50:03.038 -32:42:45.43. https://www.astronomerstelegram.org/?read=17971 Time-series photometry may reveal modulations. Thus, follow-up observations are strongly encouraged. Because of the high extinction toward this Galactic-plane target, Rc- or Ic-band observations are recommended for small telescopes.

1 0

[vsnet-outburst 31698] Outbursts 2/08/2026
by Rod Stubbings 03 Aug '26

03 Aug '26

Outbursts 2/08/2026 object YYMMDD(UT) mag code remarks CHAST 260802.474 136 Stu.RASNZ outburst ERIPS 260802.596 128 Stu.RASNZ outburst SGRV730 260802.399 150 Stu.RASNZ outburst TRADV 260802.580 139 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/

1 0

[vsnet-outburst 31697] Outbursts 1/08/2026
by Rod Stubbings 02 Aug '26

02 Aug '26

Outbursts 1/08/2026 object YYMMDD(UT) mag code remarks CENV342 260801.440 144 Stu.RASNZ outburst CENV373 260801.442 143 Stu.RASNZ outburst CENV803 260801.456 139 Stu.RASNZ outburst CRABP 260801.406 141 Stu.RASNZ outburst HYAV392 260801.381 152 Stu.RASNZ outburst MICCM 260801.406 148 Stu.RASNZ outburst SCOFQ 260801.365 135 Stu.RASNZ outburst SCOV598 260801.367 148 Stu.RASNZ outburst NSV 11274 260801.374 150 Stu.RASNZ outburst NSV 35 260801.389 150 Stu.RASNZ outburst MASTER OT J142023.47-485540.0 260801.594 142 Stu.RASNZ outburst CTCVJ1940-4724 260801.407 138 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/

1 0

[vsnet-outburst 31695] TCP J02191736+2857158: growing superhump
by Hiromasa Hoke 25 Jul '26

25 Jul '26

TCP J02191736+2857158: growing superhump Moriyama-san, Stephen, Funada-san, Peter Starr and Itoh-san reported the observation. According to the data from the last three days, the object has a superhump period of ~0.048(1)d. Further observations during this phase are very important. The current magnitude is ~14mag. best regard, Kyoto University master's grade 2 Hiromasa Hoke

2 1

[vsnet-outburst 31694] TCP J02191736+2857158: possible growing superhump
by Keisuke Isogai 23 Jul '26

23 Jul '26

TCP J02191736+2857158: possible growing superhump Stephen M. Brincat and Itoh-san reported the observations. The object is now showing a possible growing superhump. The period is 0.0585 d, but it may be an alias. Further observations during this phase are very important. The current brightness is ~14 mag.

1 0

[vsnet-outburst 31693] TCP J20354364+6131329: early superhump
by Keisuke Isogai 21 Jul '26

21 Jul '26

TCP J20354364+6131329: early superhump Sahil Purabiya, Raul Michel Murillo, and Itoh-san reported the observations. The object is showing clear double-peaked early superhumps with a period of 0.0579(3) d and an amplitude of 0.03 mag. Thus, this object is undoubtedly a WZ Sge-type object. Judging from the light curve profile, this object would be discovered around the peak of the superoutburst. Continuous observations are encouraged.

1 0

[vsnet-outburst 31692] TCP J20354364+6131329: WZ Sge-type DN candidate
by Keisuke Isogai 20 Jul '26

20 Jul '26

TCP J20354364+6131329: WZ Sge-type DN candidate We posted the optical and spectroscopic observations of TCP J20354364+6131329 to ATel: https://www.astronomerstelegram.org/?read=17912 The large outburst amplitude of ~8 mag and the spectral features suggest that this object is a good candidate for a WZ Sge-type dwarf nova. This object is ~14.0 mag now. Follow-up observations are encouraged.

1 0

[vsnet-outburst 31691] Outbursts 18/07/2016
by Rod Stubbings 19 Jul '26

19 Jul '26

Outbursts 18/07/2026 object YYMMDD(UT) mag code remarks CHAST 260718.440 143 Stu.RASNZ outburst INDTU 260718.453 145 Stu.RASNZ outburst PAVAS 260718.403 153 Stu.RASNZ outburst TRADV 260718.599 130 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/

1 0

[vsnet-outburst 31690] Re: TCPJ15030519+2202041: AM CVn-type dwarf novae
by Keisuke Isogai 18 Jul '26

18 Jul '26

This AM CVn star is ~16 mag now. Last night, this object was faint. So, this object is undergoing the next rebrightening. The typical duration of the rebrightening is about 1-2 days. Follow-up observations during the bright state and continuous monitoring are encouraged. On 2026/06/10 1:47, Josch Hambsch via vsnet-alert wrote: > Last night the target star reached mag 15.8 CV and I have switched to time series again from tonight onwards. Hopefully weather will cooperate. > > Regards, > > Josch > > Am 09.06.2026 um 13:20 schrieb Hiromasa Hoke via vsnet-alert: >> Itoh-san, Funada-san, Sano-san, Kubotera-san, Kirill Sokolovsky, Magnus Larsson, and Josch Hambsch have newly reported the observations. This object has finished its superoutburst. However, AM CVn-type dwarf novae characteristically show rebrigtening before reaching quiescence. Since it is uncertain when this object will re-bright, continuous observation is very important. >> >> Further continuous observations are strongly encouraged. Snapshots are also very welcome. >> >> best regard, >> Hiromasa Hoke >> >> On 2026/05/25 9:56, Hiromasa Hoke via vsnet-alert wrote: >>> TCPJ15030519+2202041: is still in quiescent interval before the second superoutburst >>> >>> Magnus Larsson, and Josch Hambsch have newly reported their observations. According to the data, this object is still in quiescent interval before the second superoutburst. AM CVn-type dwarf novae show the second outburst after an interval of several to more than ten days. Continued observations are encouraged to catch the onset of the second superoutburst. Thus, further snapshots are very welcome. >>> >>> best regard, >>> Hiromasa Hoke >>> >>> On 2026/05/21 17:02, Hiromasa Hoke via vsnet-alert wrote: >>>> TCPJ15030519+2202041: is still in quiescent interval before the second superoutburst >>>> >>>> Itoh-san, Moriyama-san, Hiraga-san, Funada-san, Magnus Larsson, and Josch Hambsch have newly reported their observations. According to the data, this object is still in quiescent interval before the second superoutburst. The current magnitude is 19~20. AM CVn-type dwarf novae show the second outburst after an interval of several to more than ten days. Continued observations are encouraged to catch the onset of the second superoutburst. >>>> >>>> best regard, >>>> Hiromasa Hoke >>>> >>>> On 2026/05/16 18:43, Hiromasa Hoke via vsnet-alert wrote: >>>>> TCPJ15030519+2202041: shows early superhump and rapid decay now >>>>> >>>>> Itoh-san, Moriyama-san, Hiraga-san, Funada-san, Magnus Larsson, and Josch Hambsch have newly reported their observations. According to the data, this object showed an early superhump with an amplitude of 0.03. Furthermore, this object has a superhump period of 0.03041(1). Now, this object shows rapid fading since May 15. AM CVn-type dwarf novae show the second outburst after an interval of several to more than ten days. This is a perfect opportunity to observe the growing superhump, so it is very important to observe this object even if it gets faint. >>>>> >>>>> best regard, >>>>> Hiromasa Hoke

1 0