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

[vsnet-newvar 9396] PNV J00442079+4123111: new eruption of M31N 2005-10a
by Patrick Schmeer 07 Aug '22

07 Aug '22

M31N 2005-10a = TSS J004420.7+412311 (NR) https://www.aavso.org/vsx/index.php?view=detail.top&oid=2228267 Discovery circumstances: https://www.astronomerstelegram.org/?read=627 http://www.cbat.eps.harvard.edu/unconf/followups/J00442079+4123111.html https://www.wis-tns.org/object/2022qpg ASAS-SN Sky Patrol light curves and data: https://asas-sn.osu.edu/sky-patrol/coordinate/1bea0304-f646-492c-8a5a-c6228… https://asas-sn.osu.edu/sky-patrol/coordinate/8ed69951-fbd4-4a0c-ab0b-235c6… Zwicky Transient Facility (ZTF) light curve and data: https://lasair-ztf.lsst.ac.uk/object/ZTF22aazdzyj/ AAVSO data: https://app.aavso.org/webobs/results/?star=M31N+2005-10a Further spectroscopy and multiband photometry are required. 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-newvar 9395] TCP J19212834-3058481: new transient (mag. 15) in Sagittarius
by Patrick Schmeer 07 Aug '22

07 Aug '22

TCP J19212834-3058481 = BraTS-SON-T2-039 (UG:/N:) (submitted to VSX) Discovery circumstances: http://www.cbat.eps.harvard.edu/unconf/followups/J19212834-3058481.html https://www.wis-tns.org/object/2022qry Complete ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) light curve and data: https://asas-sn.osu.edu/sky-patrol/coordinate/a7b24cdd-a176-4ee2-8a1d-87380… TCPJ19212834-3058481 20220804.2817 <16.70g ASN TCPJ19212834-3058481 20220805.1694 16.34g ASN TCPJ19212834-3058481 20220805.1707 16.44g ASN TCPJ19212834-3058481 20220805.1719 16.24g ASN TCPJ19212834-3058481 20220805.2729 15.73g ASN TCPJ19212834-3058481 20220805.2741 15.81g ASN TCPJ19212834-3058481 20220805.2754 15.95g ASN TCPJ19212834-3058481 20220806.1698 15.41g ASN TCPJ19212834-3058481 20220806.1710 15.26g ASN TCPJ19212834-3058481 20220806.1723 15.26g ASN In the Pan-STARRS1 i-band image, there is a faint object 1.7" SW of the transient that looks like a (spiral) galaxy. Spectroscopy and multiband as well as time-resolved photometry are required. Clear skies, Patrick

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[vsnet-newvar 9391] ASASSN-19oc
by Taichi Kato 04 Aug '22

04 Aug '22

ASASSN-19oc Noise? WZ Sge star with a dip in the early stage of the superoutburst. YYYYMMDD(UT) mag observer 20220726.5640 <162c (Yutaka Maeda) 20220802.5037 128:c (Yutaka Maeda)

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[vsnet-newvar 9392] ASASSN-13ce
by Taichi Kato 04 Aug '22

04 Aug '22

ASASSN-13ce SU UMa star. YYYYMMDD(UT) mag observer 20220726.8095 <161c (Yutaka Maeda) 20220802.7828 145:cG (Yutaka Maeda)

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[vsnet-newvar 9390] MASTER OT J001204.00-412337.4: superhump period
by Taichi Kato 04 Aug '22

04 Aug '22

MASTER OT J001204.00-412337.4: superhump period Josch Hambsch and Berto Monard have reported new observations. The current superhump period is 0.06105(6) d (probably still stage A). The low amplitude (0.08 mag) is consistent with a period bouncer. Single-night observation by Berto Monard during the initial plateau did not show a strong signature of early superhumps (but had some hint). Early superhumps had probably already decayed at the time of Monard's observation.

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[vsnet-newvar 9389] Re: MASTER OT J001204.00-412337.4: new SU UMa-type dwarf nova
by Taichi Kato 02 Aug '22

02 Aug '22

Re: MASTER OT J001204.00-412337.4: new SU UMa-type dwarf nova > According to ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and > Kochanek et al. 2017PASP..129j4502K) data the current superoutburst started > on (or shortly before) 2022 July 16. A dip was recorded (also by > Josch Hambsch, HMB) from July 28 to 30: Then looks likely a period-bouncer WZ Sge star. ASASSN-16hg: https://ui.adsabs.harvard.edu/abs/2018PASJ...70...47K/abstract ASASSN-15jd: https://ui.adsabs.harvard.edu/abs/2016PASJ...68...55K/abstract

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[vsnet-newvar 9387] MASTER OT J001204.00-412337.4: new SU UMa-type dwarf nova
by Taichi Kato 01 Aug '22

01 Aug '22

MASTER OT J001204.00-412337.4: new SU UMa-type dwarf nova Josch Hambsch has reported observations on three nights. The object was faint (17 mag) on July 29 and was rising rapidly on July 30 (with superhumps). Superhumps were apparent on July 31 at mag 14.9. The period is about 0.063 d.

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[vsnet-newvar 9386] Re: Var Ret 2005 likely superoutburst
by Taichi Kato 29 Jul '22

29 Jul '22

> This long outburst began between 2022 July 16 and 21. It was > observed at mag. 13 for five days, followed by a rapid fading > on July 27. The outburst was considerably longer than short > outbursts of this dwarf nova, but shorter than standard UGSU > superoutbursts (~14 days). Might be an EI Psc star, although the peak M_V is not too faint.

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[vsnet-newvar 9385] Var Ret 2005 likely superoutburst
by Patrick Schmeer 28 Jul '22

28 Jul '22

Variable Reticuli 2005 (UGSU:) https://www.aavso.org/vsx/index.php?view=detail.top&oid=161100 Recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) light curve and data: https://asas-sn.osu.edu/sky-patrol/coordinate/38d59ff4-1572-40ef-a0c5-e280e… This long outburst began between 2022 July 16 and 21. It was observed at mag. 13 for five days, followed by a rapid fading on July 27. The outburst was considerably longer than short outbursts of this dwarf nova, but shorter than standard UGSU superoutbursts (~14 days). Regards, Patrick

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[vsnet-newvar 9384] MASTER OT J001204.00-412337.4: possible WZ Sge star
by Taichi Kato 26 Jul '22

26 Jul '22

MASTER OT J001204.00-412337.4: possible WZ Sge star https://www.wis-tns.org/object/2022pel ASAS-SN data: https://asas-sn.osu.edu/sky-patrol/coordinate/de867b05-f575-4a12-abde-cbb71…

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