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[vsnet-alert 27925] Re: ZTF J191837.29+212722.1: FU Ori outburst?
by Taichi Kato 02 Aug '23

02 Aug '23

Re: ZTF J191837.29+212722.1: FU Ori outburst? Forgot to mention the TCP name (discovery of the outburst). TCP J19183710+2127170

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[vsnet-alert 27924] ZTF J191837.29+212722.1: FU Ori outburst?
by Taichi Kato 02 Aug '23

02 Aug '23

ZTF J191837.29+212722.1: FU Ori outburst? From ATLAS data. Not much variation until 2022. Recent brightening. 2MASS 191837.288 +212722.31 (2000.0) 13.810 12.942 12.628 191837.292 +212722.14 (2000.0) Gaia_DR2_4517076551873840384 plx=1.660(0.085) dismod=8.9 pmra=0.697(0.116) pmdec=-6.845(0.153) G=17.188 BP=18.800 RP=15.916 191837.292 +212722.13 (2000.0) Gaia_EDR3_4517076551873840384 plx=1.533(0.063) dismod=9.1 pmra=0.700(0.058) pmdec=-6.627(0.065) G=17.150 BP=18.664 RP=15.905 The object is too underluminous for a Mira/SR (thus not likely a symbiotic nova). FU Ori star? Somewhat close to a star-forming region. YYYYMMDD(UT) mag observer 20230521.5095 16.341o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230521.5127 16.382o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230521.5160 16.360o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230521.5240 16.298o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230523.5956 16.232o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230523.5997 16.211o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230523.6048 16.212o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230523.6107 16.169o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230523.6191 16.251o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230525.5757 16.357o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230525.5794 16.370o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230525.6000 16.370o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230525.6073 16.339o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230527.4842 16.299o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230527.4869 16.306o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230527.4934 16.297o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230527.4985 16.324o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230529.4600 16.191o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230529.4628 16.198o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230529.4685 16.201o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230529.4785 16.214o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230606.4791 16.017o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230606.4820 15.994o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230606.4857 15.978o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230606.4909 15.927o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230608.4794 16.005o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230608.4808 15.980o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230608.4839 15.954o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230608.5106 15.980o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230610.4609 15.966o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230610.4638 15.959o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230610.4692 15.989o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230610.4745 16.000o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230612.4449 16.822c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230612.4477 16.787c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230612.4693 16.832c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230612.4837 16.876c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230614.4493 17.049c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230614.4508 17.117c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230614.4540 17.179c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230614.4671 17.170c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230615.1830 16.840c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230615.1972 17.093c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230615.2009 16.956c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230615.2058 16.907c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230616.4438 17.053c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230616.4452 17.019c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230616.4589 17.062c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230616.4649 17.028c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230618.4436 16.961c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230618.4450 16.992c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230618.4497 17.046c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230618.4655 16.973c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230620.4350 16.609c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230620.4359 16.483c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230620.4373 16.551c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230620.4377 16.543c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230620.4418 16.583c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230620.4429 16.590c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230620.4468 16.647c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230620.4517 16.769c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230622.4667 16.049c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230622.4681 16.053c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230622.4709 16.021c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230622.4759 15.962c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230628.4347 14.391o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230628.4385 14.363o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230628.4446 14.366o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230628.4527 14.385o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230630.4306 14.433o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230630.4319 14.431o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230630.4347 14.418o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230630.4407 14.364o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230701.1899 14.544o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230701.1912 14.572o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230701.1948 14.537o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230701.2021 14.547o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230703.2326 15.158o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230703.2354 15.148o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230703.2708 15.004o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230703.2772 15.083o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230704.4335 15.305o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230704.4348 15.324o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230704.4387 15.323o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230704.4452 15.317o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230706.4301 15.037o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230706.4319 15.043o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230706.4346 15.032o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230706.4409 15.011o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230708.4715 14.816o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230708.4956 14.824o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230708.4978 14.795o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230708.5259 14.899o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230709.2206 14.746o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230709.2257 14.735o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230709.2289 14.762o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230709.2588 14.835o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230712.4563 15.156c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230712.4595 15.151c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230712.4653 15.133c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230712.4685 15.209c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230712.4738 15.117c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230712.4765 15.094c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230712.4881 15.117c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230712.4913 15.329c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230714.4602 15.006c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230714.4634 15.019c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230714.4969 15.089c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230714.5143 15.035c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230715.2108 13.945o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230715.2377 13.923o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230715.2409 13.937o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230715.2469 13.928o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230716.4238 15.253c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230716.4573 15.140c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230716.4602 15.131c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230716.4656 15.172c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230720.4757 14.639c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230720.4784 14.670c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230720.4793 14.625c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230720.4867 14.617c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230720.4922 14.629c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230720.4974 14.579c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230721.2031 14.002o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230721.2081 13.669o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230721.2260 13.872o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230721.2287 13.964o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230722.4230 14.782c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230722.4540 14.808c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230722.4570 14.846c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230722.4620 14.818c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230724.4232 14.666c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230724.4261 14.726c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230724.4316 14.692c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230724.4675 14.789c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230726.4292 14.475c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230726.4325 14.504c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230726.4397 14.491c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230726.4495 14.516c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230728.4094 13.927o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230728.4126 13.923o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230728.4200 13.927o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230728.4299 13.961o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230730.4081 13.737o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230730.4117 13.723o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230730.4172 13.711o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230730.4271 13.712o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230801.3906 13.759o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230801.3990 13.789o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230801.4023 13.773o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021))

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[vsnet-alert 27923] IPHAS J013840.58+580811.2 = TCP J01384061+5808110: outburst of possible SU UMa star?
by Taichi Kato 01 Aug '23

01 Aug '23

IPHAS J013840.58+580811.2 = TCP J01384061+5808110: outburst of possible SU UMa star? The 2020 July-Aug. outburst resembles a super (ASAS-SN ver2). The current outburst is similar in brightness.

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[vsnet-alert 27922] MisV1448 outburst confirmed
by Taichi Kato 01 Aug '23

01 Aug '23

MisV1448 outburst confirmed Itoh-san confirmed the outburst. An 1-hour run showed a flat light curve.

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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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