March 2022 - vsnet-newvar - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-newvar 9141] DDE 37: polar
by Taichi Kato 30 Mar '22

30 Mar '22

DDE 37: polar From ZTF data. Porb = 0.0731854(4) d. Low and high states. Stronger and weaker poles.

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[vsnet-newvar 9140] 1RXS J234500.2+342913: eclipsing polar
by Taichi Kato 30 Mar '22

30 Mar '22

1RXS J234500.2+342913: eclipsing polar From ZTF data. Porb = 0.1300449(4) d. Eclipses are more than 2 mag deep.

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[vsnet-newvar 9139] RX J2133.7+5107: VY Scl star
by Taichi Kato 30 Mar '22

30 Mar '22

RX J2133.7+5107: VY Scl star From ZTF data. Faint states in 2020 Apr. and 2021 Apr. Small outbursts late in 2020 (suggestion of an IW And star?).

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[vsnet-newvar 9138] ASASSN-22eb
by Taichi Kato 30 Mar '22

30 Mar '22

ASASSN-22eb Large outburst amplitude. ASASSN-22eb --- ------- 16:11:24.82 -22:45:57.6 2022-03-27.35 13.93 SDSS DSS VIZIER ------- CV candidate, matches to PS1 g=21.0, g>18.5 on 2022-03-26.25, g=14.3 on 2022-03-27.36, g=14.5 on 2022-03-28.18. ASASSN-22eb 20220326.25 <185g ASN ASASSN-22eb 20220327.36 143g ASN ASASSN-22eb 20220328.18 145g ASN

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[vsnet-newvar 9137] ASASSN-22ea
by Taichi Kato 30 Mar '22

30 Mar '22

ASASSN-22ea Large outburst amplitude. ASASSN-22ea --- ------- 3:38:28.06 -45:54:23.8 2022-03-26.04 14.28 SDSS DSS VIZIER ------- CV candidate, matches to DES DR2 g=21,4, g>17.5 on 2022-03-23.05, g=14.5 on 2022-03-26.04, g=14.6 on 2022-03-27.03. ASASSN-22ea 20220323.05 <175g ASN ASASSN-22ea 20220326.05 145g ASN ASASSN-22ea 20220327.03 146g ASN

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[vsnet-newvar 9136] Re: ASASSN-19yt outburst (since Mar. 16)
by Taichi Kato 30 Mar '22

30 Mar '22

Re: ASASSN-19yt outburst (since Mar. 16) > The current outburst began on 2022 March 16 according to ATLAS > forced photometry data. A rapid fading started on March 26. > The outburst duration is shorter than that of a standard UGSU > superoutburst. The light curve is that of an SS Cyg star and I had classified as such.

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[vsnet-newvar 9135] ASASSN-19yt outburst (since Mar. 16)
by Patrick Schmeer 29 Mar '22

29 Mar '22

ASASSN-19yt (UG) https://www.aavso.org/vsx/index.php?view=detail.top&oid=1498802 Recent ASAS-SN Sky Patrol light curve and data: https://asas-sn.osu.edu/sky-patrol/coordinate/b12b1094-0c9b-4216-9d5f-8f2d6… ZTF light curve, data, and images (via Lasair): https://lasair.roe.ac.uk/object/ZTF17aaagnwn/ The current outburst began on 2022 March 16 according to ATLAS forced photometry data. A rapid fading started on March 26. The outburst duration is shorter than that of a standard UGSU superoutburst. A previous outburst was observed from 2019 October 5 to 13. Follow-up observations are encouraged. Clear skies, Patrick ------- References: All-Sky Automated Survey for Supernovae (ASAS-SN) Sky Patrol: - Shappee et al., 2014ApJ...788...48S - Kochanek et al., 2017PASP..129j4502K Asteroid Terrestrial-impact Last Alert System (ATLAS): - Tonry et al., 2018PASP..130f4505T Lasair: - Smith et al., 2019RNAAS...3...26S Zwicky Transient Facility (ZTF): - Masci et al., 2019PASP..131a8003M ------- T. Kato wrote (vsnet-alert 23615, 2019 October 9): Re: ASASSN-19yt There is an XMM source. The present amplitude would suggest a dwarf nova. 061801.4 +222231 (2000.0) 2XMM_J061801.4+222231 err=0.8 5.523e-14 0.87 0.29 -0.22 -0.34

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[vsnet-newvar 9134] Karachurin14: Z Cam + VY Scl
by Taichi Kato 29 Mar '22

29 Mar '22

Karachurin14: Z Cam + VY Scl ASAS-SN data: https://asas-sn.osu.edu/sky-patrol/coordinate/c6f8014a-9a0f-498c-8fa6-8a941…

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[vsnet-newvar 9133] LAMOSTJ051254.04+310239.2: IW And star
by Taichi Kato 29 Mar '22

29 Mar '22

LAMOSTJ051254.04+310239.2: IW And star From ZTF data. IW And phenomena since the end of 2019.

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[vsnet-newvar 9132] LAMOSTJ024621.48+271053.3: period
by Taichi Kato 29 Mar '22

29 Mar '22

LAMOSTJ024621.48+271053.3: period Using the ZTF data, I obtained a period of 0.150379(3) d. Nearly sinusoidal and amplitude 0.10 mag.

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vsnet-newvar March 2022