October 2022 - vsnet-campaign-dn - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-campaign-dn 16430] ASASSN-22ho: new SU UMa-type dwarf nova

by tonny.vanmunster＠gmail.com

Dear colleagues, I have just finished analysing my unfiltered CCD observations of ASASSN-22ho, obtained on 2022, June 02/03 at CBA Belgium Observatory, using a 0.40-m f/10.0 telescope and QHY-286M CMOS camera under clear skies. Regular superhumps with an amplitude of 0.35 mag are very clearly visible in the resulting light curve, establishing ASASSN-22ho as a new SU UMa-type dwarf nova. A period analysis using the ANOVA, Lomb-Scargle, Generalized-Lomb-Scargle and PDM methods (Peranso 3.0), yields a combined (long) superhump period of 0.0902 +/- 0.0025d. The object was at mag CV = 16.5 on Jun 03rd. I will send my observations to AAVSO, CBA and VSNET for further analysis. Best regards Tonny --- Tonny Vanmunster CBA Belgium Observatory CBA Extremadura Observatory http://www.cbabelgium.com PERANSO : The Light Curve and Period Analysis Software http://www.peranso.com

6 months

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[vsnet-campaign-dn 16558] ASASSN-15pj still in outburst

by Taichi Kato

ASASSN-15pj still in outburst YYYYMMDD(UT) mag observer 20221008.4356 16.663zr (ZTF Alert DC mag (Masci+ 2019)) 20221008.5108 17.296zg (ZTF Alert DC mag (Masci+ 2019)) 20221012.3683 15.764zr (ZTF Alert DC mag (Masci+ 2019)) 20221012.6783 157:c (Yutaka Maeda) 20221012.6783 157:c (Yutaka Maeda) 20221013.6846 <155c (Yutaka Maeda) 20221014.6642 <150c (Yutaka Maeda) 20221015.6768 157:c (Yutaka Maeda) 20221017.3726 16.106zr (ZTF Alert DC mag (Masci+ 2019)) 20221018.6800 162:c (Yutaka Maeda)

7 months, 1 week

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[vsnet-campaign-dn 16557] KIC11390659 fading rapidly

by Taichi Kato

KIC11390659 fading rapidly YYYYMMDD(UT) mag observer 20221012.1327 16.652zg (ZTF Alert DC mag (Masci+ 2019)) 20221012.500 165C (Mitsutaka Hiraga) 20221012.6669 <162C (Masayuki Moriyama) 20221013.6258 163:C (Masayuki Moriyama) 20221015.487 125 (Hiroyuki Maehara) 20221016.826 13.12C (Gary Poyner) 20221016.8263 13.00C (Masao Funada) 20221017.6023 143C (Masayuki Moriyama) 20221018.567 151 (Hiroyuki Maehara)

7 months, 1 week

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[vsnet-campaign-dn 16556] MN Dra likely superoutburst

by Taichi Kato

MN Dra likely superoutburst YYYYMMDD(UT) mag observer 20221011.3215 20.278zg (ZTF Alert DC mag (Masci+ 2019)) 20221011.3412 18.740zg (ZTF Alert DC mag (Masci+ 2019)) 20221012.5363 <157c (Yutaka Maeda) 20221012.6207 <170C (Masayuki Moriyama) 20221013.1579 20.072zr (ZTF Alert DC mag (Masci+ 2019)) 20221013.1584 19.046zr (ZTF Alert DC mag (Masci+ 2019)) 20221013.2022 19.701zg (ZTF Alert DC mag (Masci+ 2019)) 20221013.2251 19.256zg (ZTF Alert DC mag (Masci+ 2019)) 20221013.5429 <154c (Yutaka Maeda) 20221014.5208 <154c (Yutaka Maeda) 20221014.6231 <165C (Masayuki Moriyama) 20221015.1359 16.725zg (ZTF Alert DC mag (Masci+ 2019)) 20221015.1388 16.818zg (ZTF Alert DC mag (Masci+ 2019)) 20221015.1786 16.649zr (ZTF Alert DC mag (Masci+ 2019)) 20221015.1828 16.569zr (ZTF Alert DC mag (Masci+ 2019)) 20221015.5354 <153c (Yutaka Maeda) 20221017.6507 159:C (Masayuki Moriyama)

7 months, 1 week

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[vsnet-campaign-dn 16555] CRTSJ035318.1-034847 possible superoutburst

by Taichi Kato

CRTSJ035318.1-034847 possible superoutburst Type from ZTF data. Supercycle about 90 d. YYYYMMDD(UT) mag observer 20221010.3980 18.602zg (ZTF Alert DC mag (Masci+ 2019)) 20221010.4414 19.389zr (ZTF Alert DC mag (Masci+ 2019)) 20221012.3725 17.943zr (ZTF Alert DC mag (Masci+ 2019)) 20221012.4425 18.293zg (ZTF Alert DC mag (Masci+ 2019)) 20221017.1745 15.26C (Masao Funada)

7 months, 1 week

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[vsnet-campaign-dn 16554] ZTF18abocmat likely superoutburst

by Taichi Kato

ZTF18abocmat likely superoutburst Type from ZTF data. YYYYMMDD(UT) mag observer 20221013.1943 17.028zg (ZTF Alert DC mag (Masci+ 2019)) 20221015.1292 16.127zg (ZTF Alert DC mag (Masci+ 2019)) 20221015.1668 16.351zr (ZTF Alert DC mag (Masci+ 2019))

7 months, 1 week

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[vsnet-campaign-dn 16553] ZTF18aaqzomm likely superoutburst

by Taichi Kato

ZTF18aaqzomm likely superoutburst Type from ZTF data. Supercycle about 210 d. YYYYMMDD(UT) mag observer 20221012.1327 18.197zg (ZTF Alert DC mag (Masci+ 2019)) 20221013.1303 17.564zr (ZTF Alert DC mag (Masci+ 2019)) 20221013.1802 17.553zg (ZTF Alert DC mag (Masci+ 2019)) 20221014.1392 17.384zg (ZTF Alert DC mag (Masci+ 2019)) 20221015.1421 17.565zg (ZTF Alert DC mag (Masci+ 2019)) 20221015.1764 17.522zr (ZTF Alert DC mag (Masci+ 2019))

7 months, 1 week

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[vsnet-campaign-dn 16552] Gaia18cqv likely superoutburst

by Taichi Kato

Gaia18cqv likely superoutburst Type from ZTF data. YYYYMMDD(UT) mag observer 20221013.1371 16.818zr (ZTF Alert DC mag (Masci+ 2019)) 20221013.2242 16.688zg (ZTF Alert DC mag (Masci+ 2019)) 20221015.2204 16.931zg (ZTF Alert DC mag (Masci+ 2019))

7 months, 1 week

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[vsnet-campaign-dn 16551] SDSS J001153.08-064739.1: positive Pdot

by Taichi Kato

SDSS J001153.08-064739.1: positive Pdot Tonny Vanmunster, Josch Hambsch and Filipp Romanov have reported observations. The mean superhump period is 0.10446(2) d. Pdot is positive +8(3)*10^(-5), which is rare for an object in the period gap.

7 months, 1 week

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[vsnet-campaign-dn 16550] Gaia19cvn: possible superoutburst

by Taichi Kato

Gaia19cvn: possible superoutburst Type from ZTF data. Superoutburst expected from supercycle (1 year). YYYYMMDD(UT) mag observer 20221014.2202 17.832zg (ZTF Alert DC mag (Masci+ 2019)) 20221014.3509 17.323zr (ZTF Alert DC mag (Masci+ 2019))

7 months, 1 week

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vsnet-campaign-dn October 2022