February 2022 - vsnet-alert - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-alert 26617] SX LMi: early stage transition
by Taichi Kato 28 Feb '22

28 Feb '22

SX LMi: early stage transition Itoh-san, Kiyota-san, Kyoto U. team, Kubodera-san, Imamura-san and Filipp Romanov have reported observations. There was a clear stage transition on Feb. 23. This looks like stage B-C transition, and if it is the case, the duration of stage B was short compared to other SU UMa stars with similar orbital periods.

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[vsnet-alert 26616] ASASSN-22ce: superhump period
by Taichi Kato 28 Feb '22

28 Feb '22

ASASSN-22ce: superhump period Itoh-san and Josch Hambsch have reported observations. The superhump period is 0.07134(2) d. Itoh-san's initial observations were apparently obtained during the final phase of stage A.

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[vsnet-alert 26615] CRTS J044636.9+083033 superoutburst
by Taichi Kato 27 Feb '22

27 Feb '22

CRTS J044636.9+083033 superoutburst YYYYMMDD(UT) mag observer 20220214.5119 <157c (Yutaka Maeda) 20220215.5260 <154c (Yutaka Maeda) 20220223.4904 153:cG (Yutaka Maeda) 20220223.4905 153:cG (Yutaka Maeda) 20220224.4883 151:cG (Yutaka Maeda) 20220225.4887 153c (Yutaka Maeda) 20220226.024 15.40C (Gary Poyner) 20220226.0254 15.29C (Masao Funada) 20220226.4972 154:c (Yutaka Maeda)

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[vsnet-alert 26614] CC Cnc outburst
by Taichi Kato 27 Feb '22

27 Feb '22

CC Cnc outburst (UGSU) YYYYMMDD(UT) mag observer 20220224.8674 <141 (Eddy Muyllaert) 20220225.467 <134 (Tsuneo Horie) 20220225.6000 <157c (Yutaka Maeda) 20220225.7475 <162C (Masayuki Moriyama) 20220225.8771 <141 (Eddy Muyllaert) 20220225.930 <149 (Gary Poyner) 20220226.2129 14.383zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220226.469 <118 (Tsuneo Horie) 20220226.6152 140:cG (Yutaka Maeda)

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[vsnet-alert 26612] ASASSN-22ce: new SU UMa-type dwarf nova
by Taichi Kato 24 Feb '22

24 Feb '22

ASASSN-22ce: new SU UMa-type dwarf nova Itoh-san detected superhumps (0.3 mag) on Feb. 23. The period is slightly longer than 0.06 d.

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[vsnet-alert 26611] SX LMi superhumps
by Taichi Kato 23 Feb '22

23 Feb '22

SX LMi superhumps Itoh-san has detected superhumps for three nights. In my record, the last observations with detectable superhumps was in 2002 by Kyoto U. team. Past observations were not of good quality and Pdot has not yet been determined.

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[vsnet-alert 26610] ZTF18abunevo outburst (since Feb. 17)
by Patrick Schmeer 23 Feb '22

23 Feb '22

ZTF18abunevo (UGSS:) https://www.aavso.org/vsx/index.php?view=detail.top&oid=2225736 SS Cyg-type outbursts (slow rise etc.) according to ZTF data: https://lasair.roe.ac.uk/object/ZTF18abunevo/ Gaia (Photometric) Science Alerts data: http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia22ast/ Complete ASAS-SN Sky Patrol light curve and data (contaminated): https://asas-sn.osu.edu/sky-patrol/coordinate/1cb1fc56-0f43-4fd1-88ea-69dad… 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 Lasair: - Smith et al., 2019RNAAS...3...26S Zwicky Transient Facility (ZTF): - Masci et al., 2019PASP..131a8003M

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[vsnet-alert 26609] NSV 5031 rebrightened!
by Rod Stubbings 22 Feb '22

22 Feb '22

NSV 5031 has rebrightened from its first recorded superoutburst. NSV 5031 220221.483 <161 NSV 5031 220222.503 149 NSV 5031 220222.526 150 -- Rod Stubbings Tetoora Road Observatory Victoria, Australia Telescope: "Infinity" 22" f/3.8 stubbo(a)dcsi.net.au http://rodstubbingsobservatory.wordpress.com/

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[vsnet-alert 26608] CRTS J172515.5+073249 Gaia detection
by Taichi Kato 21 Feb '22

21 Feb '22

CRTS J172515.5+073249 Gaia detection http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia22arr/ Gaia22arr AT2022cut 2022-02-18 18:04:41 261.31483 7.54699 16.29 20.86 0.11 unknown 2022-02-20 09:58:04 candidate CV CSS100706:172516+073249 in 4.5 mag blue outburst

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[vsnet-alert 26607] Gaia22asc
by Taichi Kato 21 Feb '22

21 Feb '22

Gaia22asc Rather strange light curve. Blue. http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia22asc/ Gaia22asc AT2021ahpl 2022-02-19 23:04:31 228.99142 -19.29221 17.52 19.95 0.39 unknown 2022-02-21 08:31:14 Gaia and GALEX source brightens by 2.5 mag

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vsnet-alert February 2022