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

[vsnet-alert 27787] ASASSN-14ai likely superoutburst
by Taichi Kato 29 May '23

29 May '23

ASASSN-14ai likely superoutburst Type from ATLAS + ASAS-SN DB. YYYYMMDD(UT) mag observer 20230519.7535 <18.862g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230520.0953 <17.616g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230521.0913 18.520g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230524.0784 17.839g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230525.0743 <17.502g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230527.0656 16.263g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230528.0612 15.959g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))

1 0

[vsnet-alert 27786] CH Her superhump period
by Taichi Kato 29 May '23

29 May '23

CH Her superhump period Tamas Tordai has reported second-night observations. The superhump period is established to be 0.07398(3) d. The amplitude is 0.15 mag.

1 0

[vsnet-alert 27785] V1310 Cyg long outburst
by Taichi Kato 29 May '23

29 May '23

V1310 Cyg long outburst Nay be a superoutburst. YYYYMMDD(UT) mag observer 20230515.8079 <140c (Yutaka Maeda) 20230516.8015 <143c (Yutaka Maeda) 20230518.4347 21.052zg (ZTF Alert DC mag (Masci+ 2019)) 20230522.4089 16.213zr (ZTF Alert DC mag (Masci+ 2019)) 20230522.4590 16.656o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230522.4613 17.125o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230522.4843 16.868o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230522.4930 16.638o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230524.5401 16.485o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230524.5695 16.607o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230524.5732 16.488o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230524.5786 17.112o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230525.4339 16.077zg (ZTF Alert DC mag (Masci+ 2019)) 20230525.4522 16.169zr (ZTF Alert DC mag (Masci+ 2019)) 20230526.5123 16.980o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230526.5154 16.789o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230526.5326 16.642o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230526.5444 16.811o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230527.5066 16.574o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230527.5290 16.599o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230527.5317 16.583o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230527.5370 16.479o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230528.5155 16.575o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230528.5280 16.422o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230528.5311 16.364o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021))

1 0

[vsnet-alert 27784] ASASSN-18fp superoutburst
by Taichi Kato 29 May '23

29 May '23

ASASSN-18fp superoutburst YYYYMMDD(UT) mag observer 20230523.4905 <149c (Yutaka Maeda) 20230526.4925 138:c (Yutaka Maeda) 20230528.692 137 (Rod Stubbings)

1 0

[vsnet-alert 27783] EK TrA outburst
by Taichi Kato 29 May '23

29 May '23

EK TrA outburst Faint superoutburst? Bright superoutburst in 2021 Mar. YYYYMMDD(UT) mag observer 20230519.2466 16.797o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230519.2497 17.334o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230519.2571 16.728o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230519.2645 14.813g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230519.2690 17.287o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230520.9132 16.651c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230520.9178 17.043c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230520.9252 16.642c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230521.0276 16.533c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230523.9051 12.081c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230523.9106 12.072c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230523.9138 12.045c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230523.9246 12.063c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230525.2007 11.798o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230525.2048 11.861o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230525.2243 11.967o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230525.2374 12.042o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230526.9912 11.531g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230528.0765 11.737g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230528.692 121 (Rod Stubbings)

1 0

[vsnet-alert 27782] QU Aqr superoutburst
by Taichi Kato 29 May '23

29 May '23

QU Aqr superoutburst Known SU UMa star. Frequent superoutbursts and would deserve ER UMa-type classification (but superoutbursts are not very long). YYYYMMDD(UT) mag observer 20230519.3594 <17.108g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230520.4031 17.754zr (ZTF Alert DC mag (Masci+ 2019)) 20230520.4293 17.438zg (ZTF Alert DC mag (Masci+ 2019)) 20230522.4032 17.328zr (ZTF Alert DC mag (Masci+ 2019)) 20230522.4258 17.240zg (ZTF Alert DC mag (Masci+ 2019)) 20230523.3375 15.882g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230524.3479 15.966g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230524.4245 15.877zr (ZTF Alert DC mag (Masci+ 2019)) 20230524.4500 15.815zg (ZTF Alert DC mag (Masci+ 2019)) 20230525.2422 15.651g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230525.3271 15.722g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230525.678 154 (Rod Stubbings) 20230526.4123 15.774g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230526.4560 15.663zr (ZTF Alert DC mag (Masci+ 2019))

1 0

[vsnet-alert 27781] CH Her: indeed SU UMa star
by Taichi Kato 26 May '23

26 May '23

CH Her: indeed SU UMa star Tamas Tordai has reported observations and detected superhumps (period about 0.075 d).

1 0

[vsnet-alert 27780] 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 Photometry (Tonry+2018; Shingles+2021)) 20230514.5474 18.590o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230518.5714 16.432o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230518.5756 16.479o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230520.626 171C (Mitsutaka Hiraga) 20230522.5366 17.022o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230522.5389 16.974o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230522.5517 17.076o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230522.5595 17.006o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230523.5531 17.023o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230523.5549 17.121o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230523.5580 17.017o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021))

1 0

[vsnet-alert 27779] 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 (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230511.4188 16.740g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230512.4145 17.266g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230513.4139 16.394g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230514.4096 17.473g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230514.4096 17.493g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230515.4356 <16.397g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230516.4280 16.425g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230518.4082 16.861g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20230519.3911 16.184o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230519.3929 17.303o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230524.4065 <16.721g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014))

1 0

[vsnet-alert 27778] 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, but as I already reported, this object appears to be a WZ Sge star.

1 0

2025

2024

2023

2022

2021

vsnet-alert May 2023