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[vsnet-campaign-dn 17303] ASASSN-16pr: SU UMa star
by Taichi Kato 25 May '23

25 May '23

ASASSN-16pr: SU UMa star From ATLAS data. Superoutburst + rebrightening in 2023 Jan. Other superoutbursts in 2019 Mar. and 2020 Oct.

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[vsnet-campaign-dn 17302] ASASSN-16mi possible superoutburst
by Taichi Kato 25 May '23

25 May '23

ASASSN-16mi possible superoutburst Type from ZTF+ATLAS. Faint superoutburst? YYYYMMDD(UT) mag observer 20230509.2645 <17.076g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230509.2645 <17.407g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230510.4399 <17.166g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230514.5365 18.841o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230514.5415 18.756o (ATLAS Forced … [View More]

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[vsnet-campaign-dn 17301] ASASSN-16lh outburst
by Taichi Kato 25 May '23

25 May '23

ASASSN-16lh outburst Long and short outbursts (long one presently). Amplitude too small for an SU UMa star? YYYYMMDD(UT) mag observer 20230507.4281 <16.779g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230509.1149 18.371o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230509.1195 18.635o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230509.1254 18.462o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230510.4227 <17.029g (… [View More]

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[vsnet-campaign-dn 17300] Gaia DR3 2893005857946801152 = ASASSN-23dr: superhump period
by Taichi Kato 25 May '23

25 May '23

Gaia DR3 2893005857946801152 = ASASSN-23dr: superhump period Berto Monard and Josch Hambsch have reported further observations. Thanks to Monard's high-cadence data, it has become apparent that ordinary superhumps started to appear on May 19. Due the the gap in the observation, I analyzed the data since May 22 and obtained a superhump period of 0.0580(1) d (amplitude 0.10 mag and the existence of superhumps is unambiguous). I could not detect early superhumps corresponding to this period,… [View More]

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[vsnet-campaign-dn 17299] ASASSN-22ak period
by Taichi Kato 25 May '23

25 May '23

ASASSN-22ak period Josch Hambsch has reported further observations. Thanks to the recent high-cadence data, the period has been established. The object brightened a bit on May 21 and the period since then has been 0.04292(2) d. Based on this alias selection, the period from the entire data is 0.043032(4) d. The profile still never appeared to be typical superhump-like. It has been fast rising and slower fading, as in early superhumps. The amplitude is 0.04 mag. The observations appear to … [View More]

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[vsnet-campaign-dn 17298] Gaia DR3 4538714906329565952 = ZTF23aaladoy outburst
by Taichi Kato 25 May '23

25 May '23

Gaia DR3 4538714906329565952 = ZTF23aaladoy outburst Fading too rapidly for a superoutburst? YYYYMMDD(UT) mag observer 20230521.5006 15.905o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230521.5024 15.928o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230521.5063 15.932o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230521.5122 15.924o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230523.6066 16.246o (ATLAS Forced Photometry (… [View More]

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[vsnet-campaign-dn 17297] ASASSN-13bs outburst
by Taichi Kato 25 May '23

25 May '23

ASASSN-13bs outburst Subtype unknown. Rather strange behavior in the past. YYYYMMDD(UT) mag observer 20230513.6041 <167C (Masayuki Moriyama) 20230514.599 175C (Mitsutaka Hiraga) 20230514.7266 <163C (Masayuki Moriyama) 20230514.7332 <149c (Yutaka Maeda) 20230515.6956 <145c (Yutaka Maeda) 20230519.7000 <162c (Yutaka Maeda) 20230520.576 175C (Mitsutaka Hiraga) 20230523.7797 144C (Masayuki Moriyama)

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[vsnet-campaign-dn 17296] CH Her likely superoutburst
by Taichi Kato 25 May '23

25 May '23

CH Her likely superoutburst Time-resolved photometry is strongly encouraged. Not done before. (ZTF and ATLAS data suggest an SU UMa star, as previously reported) YYYYMMDD(UT) mag observer 20230515.597 <175C (Mitsutaka Hiraga) 20230515.6874 <151c (Yutaka Maeda) 20230516.5026 16.842g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230516.6808 <144c (Yutaka Maeda) 20230519.6916 <141c (Yutaka Maeda) 20230521.4021 14.456g (ASAS-SN Sky Patrol … [View More]

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[vsnet-campaign-dn 17295] Gaia DR3 2893005857946801152 = ASASSN-23dr: most likely WZ Sge star
by Taichi Kato 24 May '23

24 May '23

Gaia DR3 2893005857946801152 = ASASSN-23dr: most likely WZ Sge star Josch Hambsch has reported further observations. There was an apparent superhump on May 22-23. As judged from the outburst light curve, the object probably entered the phase of ordinary superhumps (but there was a gap in the data). The initial rapid decay and the waiting time suggest a WZ Sge star.

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[vsnet-campaign-dn 17294] V592 Her superoutburst, recent data
by Taichi Kato 24 May '23

24 May '23

V592 Her superoutburst, recent data Apparently in SU UMa mode (superoutburst in 2021 Dec.). Quiescence has become brighter (ZTF data). Itoh-san already detected superhump-like modulations. YYYYMMDD(UT) mag observer 20230518.1626 <18.162g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230518.4078 <18.399g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230518.9549 <142 (Eddy Muyllaert) 20230519.6030 <144c (Yutaka Maeda) 20230521.022 &… [View More]

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