July 2023 - vsnet-alert - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-alert 27039] GX Cas (UGSU) outburst
by Kirill Sokolovsky 20 Aug '23

20 Aug '23

The UGSU-type dwarf nova GX Cas is in outburst according to NMW survey photometry (135mm f/2.0 lens + unfiltered ST-8300M CCD): 2022-11-13.7397 2459897.2397 13.4 CV AAVSO observer KLO reports visual observation of this outburst: 2022-11-12.9520 2459896.4520 13.6 Vis. ASAS-SN photometry (latest observation is quiescence on 2022-11-12.165): https://asas-sn.osu.edu/sky-patrol/coordinate/7c8f8333-01a3-49aa-ba14-08b07… VSX record for GX Cas https://www.aavso.org/vsx/index.php?view=detail.top&oid=6537 Best wishes, Kirill Sokolovsky, Stanislav Korotkiy, Olga Smolyankina, Anna Prokudina, Sergei Ostapenko

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[vsnet-alert 27921] MisV1448 outburst?
by Taichi Kato 31 Jul '23

31 Jul '23

MisV1448 outburst? Long-Porb SU UMa star with multiple rebrightenings. Last superoutburst in 2020. Another one in 2012. YYYYMMDD(UT) mag observer 20230715.9500 <142 (Eddy Muyllaert) 20230717.024 <150 (Gary Poyner) 20230717.9500 <142 (Eddy Muyllaert) 20230719.9507 <142 (Eddy Muyllaert) 20230729.9438 131 (Eddy Muyllaert)

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[vsnet-alert 27920] V548 Pav outburst
by Taichi Kato 26 Jul '23

26 Jul '23

V548 Pav outburst Subtype not determined yet. Possibly a long-Porb SU UMa star. YYYYMMDD(UT) mag observer 20230710.8578 <18.478g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230711.2913 <17.856g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230711.3549 <18.170g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230725.474 143 (Rod Stubbings)

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[vsnet-alert 27919] VY Scl fading
by Taichi Kato 26 Jul '23

26 Jul '23

VY Scl fading As pointed out by Rod Stubbings. YYYYMMDD(UT) mag observer 20230614.4047 13.381g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230616.2739 13.649g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230617.3584 13.664g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230619.2794 13.115g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230623.0134 13.247g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230624.0234 13.387g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230625.2558 13.569g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230626.2966 13.750g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230629.2510 13.650g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230630.4389 14.046g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230702.2937 13.475g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230703.3364 13.478g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230705.2270 13.728g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230708.4395 13.474g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230711.5528 141 (Rod Stubbings) 20230712.5667 140 (Rod Stubbings) 20230715.6410 144 (Rod Stubbings) 20230716.7431 141 (Rod Stubbings) 20230717.5549 144 (Rod Stubbings) 20230725.505 <153 (Rod Stubbings)

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[vsnet-alert 27918] ASASSN-14ak bright outburst (super?)
by Taichi Kato 24 Jul '23

24 Jul '23

ASASSN-14ak bright outburst (super?) Superoutburst + rebrightening in 2019 June (ASAS-SN DB). The current one appears to be brighter than the 2023 Feb. one (long normal outburst?) YYYYMMDD(UT) mag observer 20230710.7174 <17.613g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230711.7139 <17.872g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230722.360 129 (Rod Stubbings)

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[vsnet-alert 27917] RX Cha superoutburst
by Taichi Kato 24 Jul '23

24 Jul '23

RX Cha superoutburst YYYYMMDD(UT) mag observer 20230708.9625 <16.405g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230708.9927 <17.800g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230710.7327 <17.766g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230711.7291 <18.018g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230711.7672 <17.985g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230719.397 148 (Rod Stubbings) 20230721.451 148 (Rod Stubbings) 20230722.385 148 (Rod Stubbings)

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[vsnet-alert 27916] TCP J16294031-4022063: unusually reddened SU UMa-type dwarf nova?
by Taichi Kato 24 Jul '23

24 Jul '23

TCP J16294031-4022063: unusually reddened SU UMa-type dwarf nova? Josch Hambsch has reported observations. The data showed regular 0.23-mag superhumps with a period of 0.0543(4) d. This result, however, is strange since this object is apparently reddened like a nova: YYYYMMDD(UT) mag observer 20230716.5893 14.73V (Masayuki Moriyama) 20230716.5904 14.21Rc (Masayuki Moriyama) 20230716.5914 13.68Ic (Masayuki Moriyama) 20230716.5925 15.06B (Masayuki Moriyama) If this is a reddened SU UMa-type dwarf nova, the object should be fairly close. The absence of a bright quiescent counterpart would be problematic. Further observations are strongly encouraged.

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[vsnet-alert 27915] TCP J18425840+0958555: new WZ Sge-type dwarf nova
by Taichi Kato 24 Jul '23

24 Jul '23

TCP J18425840+0958555: new WZ Sge-type dwarf nova Itoh-san has reported observations. This object showed 0.13-mag early superhumps with a period of 0.0570(3) d.

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[vsnet-alert 27914] BP CrA: standstill ended in June somewhat like IW And star
by Taichi Kato 20 Jul '23

20 Jul '23

BP CrA: standstill ended in June somewhat like IW And star YYYYMMDD(UT) mag observer 20230523.9175 14.269g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230524.3440 14.358g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230525.3297 14.392g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230526.9121 14.275g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230527.1708 14.405g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230527.3433 14.315g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230527.9037 14.407g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230528.1667 14.374g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230528.2440 14.92cG (Masao Funada) 20230528.9102 14.266g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230530.2143 14.358g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230601.2480 14.436g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230602.3123 14.481g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230608.3383 14.368g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230609.3535 14.417g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230612.0771 14.612g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230612.4160 14.461g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230613.3545 14.360g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230615.0784 14.150g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230616.0056 14.026g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230617.0625 13.750g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230617.4278 13.813g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230618.2130 13.742g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230618.428 138 (Rod Stubbings) 20230618.7157 142C (Masayuki Moriyama) 20230619.1721 13.761g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230622.7972 14.514g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230623.4110 14.858g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230623.9431 14.579g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230624.3400 15.049g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230625.0766 14.876g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230626.0351 14.939g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230627.0391 15.215g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230630.9854 14.003g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230701.2333 14.012g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230705.0092 14.993g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230705.7580 14.882g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230706.2330 15.187g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230706.7559 14.819g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230707.3121 15.158g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230708.3300 14.994g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230709.0850 15.025g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230709.1524 14.697g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230711.1006 13.868g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230711.7595 13.959g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230712.396 140 (Rod Stubbings) 20230716.758 159 (Rod Stubbings) 20230717.410 159 (Rod Stubbings) 20230719.385 151 (Rod Stubbings)

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[vsnet-alert 27913] ST Cha standstill
by Taichi Kato 20 Jul '23

20 Jul '23

ST Cha standstill YYYYMMDD(UT) mag observer 20230703.6975 13.941g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230704.076 14.06C (Gary Poyner) 20230704.0773 14.29cG (Masao Funada) 20230704.7084 14.176g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230705.0501 14.283g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230705.7007 14.404g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230706.7166 14.449g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230706.7401 14.397g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230706.7481 14.295g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230710.7327 14.286g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230711.417 143 (Rod Stubbings) 20230711.7291 14.212g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230711.7672 14.298g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230712.496 144 (Rod Stubbings) 20230715.683 143 (Rod Stubbings) 20230716.764 143 (Rod Stubbings) 20230717.424 143 (Rod Stubbings) 20230719.396 143 (Rod Stubbings)

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vsnet-alert July 2023