April 2023 - vsnet-campaign-dn - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-campaign-dn 17222] CS Ind outburst
by Taichi Kato 30 Apr '23

30 Apr '23

CS Ind outburst See Kato et al. (2019) PASJ 71, L4 Long normal or superoutburst? YYYYMMDD(UT) mag observer 20230418.1324 17.290o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230418.1359 17.273o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230418.1364 17.303o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230418.1405 17.321o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230418.1506 17.139o (ATLAS Forced Photometry (Tonry+… [View More]

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[vsnet-campaign-dn 17221] NY Ser no superhumps
by Taichi Kato 30 Apr '23

30 Apr '23

NY Ser no superhumps Kiyota-san reported second-night observations. No superhumps were present on Apr. 28. Not faded since Apr. 27.

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[vsnet-campaign-dn 17220] OT J142936.2+322629 = CSS140607:142936+322630 outburst
by Taichi Kato 30 Apr '23

30 Apr '23

OT J142936.2+322629 = CSS140607:142936+322630 outburst SS Cyg type? YYYYMMDD(UT) mag observer 20230420.4744 <17.058g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230421.5384 17.200c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230421.5936 17.097c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230421.6079 17.015c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230421.6164 17.092c (ATLAS Forced Photometry (Tonry+2018; Shingles+… [View More]2021)) 20230422.2331 16.664c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230422.2362 16.757c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230422.2414 16.681c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230422.2767 16.722c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230423.3859 16.618c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230423.4214 16.669c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230423.4275 16.663c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230423.4307 16.684c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.4146 16.860c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.4160 16.825c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.4179 16.862c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.4188 16.852c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.4224 16.861c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.4233 16.802c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.4278 16.956c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230425.4384 16.874c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230426.2703 16.226g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230426.3917 17.186o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230426.3946 17.248o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230426.4090 17.159o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230426.4145 17.260o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230427.3643 16.656g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230428.1570 17.458o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230428.1593 17.590o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230428.1634 17.549o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230428.508 17.02C (Hiroshi Itoh) [View Less]

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[vsnet-campaign-dn 17219] Re: ASASSN-22ak another outburst (peculiar object)
by Taichi Kato 30 Apr '23

30 Apr '23

Re: ASASSN-22ak another outburst (peculiar object) > YYYYMMDD(UT) mag observer > 20230429.699 152 (Rod Stubbings) The last negative observation by ATLAS was on Apr. 12. Negative in ASAS-SN on Apr. 20.

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[vsnet-campaign-dn 17218] ASASSN-22ak another outburst (peculiar object)
by Taichi Kato 30 Apr '23

30 Apr '23

ASASSN-22ak another outburst (peculiar object) Very unusual object with long outbursts with a sharp peark in 2022 Jan. Not seen in outburst before this 2022 event. AM CVn or related star suspected from the rapid fading. Superhumps were not convincingly detected during the 2022 Nov.-Dec. outburst in the late phase. Please make time-resolved photometry quickly since superhumps may be prominent now! YYYYMMDD(UT) mag observer 20230429.699 152 (Rod Stubbings) 225608.826 -683610.36 (… [View More]

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[vsnet-campaign-dn 17217] ASASSN-19hr superhumps
by Taichi Kato 29 Apr '23

29 Apr '23

ASASSN-19hr superhumps Tamas Tordai detected well-developed superhumps on Apr. 25. YYYYMMDD(UT) mag observer 20230412.7427 <150c (Yutaka Maeda) 20230416.4147 13.305g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230416.7384 <154c (Yutaka Maeda) 20230417.7544 <151c (Yutaka Maeda) 20230418.4894 13.538g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230420.2767 13.881g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) … [View More]

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[vsnet-campaign-dn 17216] V1239 Her superoutburst
by Taichi Kato 29 Apr '23

29 Apr '23

V1239 Her superoutburst UGSU+E YYYYMMDD(UT) mag observer 20230422.6881 <161c (Yutaka Maeda) 20230424.3602 16.477g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230425.9382 <143 (Eddy Muyllaert) 20230426.6758 140cG (Yutaka Maeda) 20230426.7804 143C (Masayuki Moriyama) 20230427.7074 137cG (Yutaka Maeda) 20230428.2956 14.324g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))

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[vsnet-campaign-dn 17215] TCP J06093784+3046519: fading and rebrightening
by Taichi Kato 29 Apr '23

29 Apr '23

TCP J06093784+3046519: fading and rebrightening The behavior suggests an AM CVn star. Although time-resolved photometry has been reported, I could not find a convincing superhump period (rather low S/N and variations did not agree well between different observers). YYYYMMDD(UT) mag observer 20230413.4442 14.02C (Masayuki Moriyama) 20230413.4455 13.68B (Masayuki Moriyama) 20230413.4466 13.93V (Masayuki Moriyama) 20230413.4477 13.66Rc (Masayuki Moriyama) 20230413.4488 13.… [View More]

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[vsnet-campaign-dn 17214] NY Ser likely superoutburst
by Taichi Kato 29 Apr '23

29 Apr '23

NY Ser likely superoutburst Kiyota-san's data were still flat on Apr. 27. YYYYMMDD(UT) mag observer 20230421.976 <154 (Pavol A. Dubovsky) 20230422.6359 <150c (Yutaka Maeda) 20230422.7883 <166C (Masayuki Moriyama) 20230426.6233 148cG (Yutaka Maeda) 20230426.6233 148cG (Yutaka Maeda) 20230426.7585 152C (Masayuki Moriyama) 20230427.6562 144:c (Yutaka Maeda) 20230427.7757 150C (Masayuki Moriyama) 20230428.1741 14.863g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))

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[vsnet-campaign-dn 17213] TCP J16064415-1611467: new SU UMa-type dwarf nova
by Taichi Kato 29 Apr '23

29 Apr '23

TCP J16064415-1611467: new SU UMa-type dwarf nova Itoh-san has reported observations. The object showed 0.2-mag variations with a period of 0.06 d. The profile resembles that of evolving ordinary superhumps, but the variations may be early superhumps. Further observations are needed to clarify the nature.

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