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

[vsnet-newvar 9620] ASASSN-13bz: SU UMa star (or even WZ Sge)
by Taichi Kato 04 Dec '22

04 Dec '22

ASASSN-13bz: SU UMa star (or even WZ Sge) Itoh-san detected superhumps on Dec. 3 (amplitude 0.12 mag). The period from single-night baseline is 0.059(1) d. I suspected this object to be an SS Cyg star based on the initial fading rate (0.2-0.4 mag/d) and the lack of superhumps, but this may have been a viscous decay phase of a WZ Sge star (considering the rarity of outbursts). Early superhumps may have not been present simply based on a low inclination.

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[vsnet-newvar 9619] ZTF22abteqxm: rapid fading from superoutburst
by Taichi Kato 04 Dec '22

04 Dec '22

ZTF22abteqxm: rapid fading from superoutburst YYYYMMDD(UT) mag observer 20221126.6388 168C (Masayuki Moriyama) 20221128.2014 16.925zr (ZTF Alert DC mag (Masci+ 2019)) 20221201.1529 18.921zr (ZTF Alert DC mag (Masci+ 2019)) 20221201.2202 19.080zg (ZTF Alert DC mag (Masci+ 2019))

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[vsnet-newvar 9617] CRTS J220449.8+054852 superhump period
by Taichi Kato 03 Dec '22

03 Dec '22

CRTS J220449.8+054852 superhump period Tonny Vanmunster and Itoh-san have reported observations. The superhump period from these observations was 0.0948(1) d, slightly shorter than reported in [vsnet-alert 27150]. Large superhump amplitude. (Dear Tonny, your messages were again under "ASASSN-22ho: new SU UMa-type dwarf nova").

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[vsnet-newvar 9616] ASASSN-13bz: no apparent superhumps
by Taichi Kato 03 Dec '22

03 Dec '22

ASASSN-13bz: no apparent superhumps Itoh-san and Tonny Vanmunster have reported observations. No apparent superhumps were recorded. This object appears to be an SS Cyg star.

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[vsnet-newvar 9615] Gaia21fgn: long fading tail
by Taichi Kato 02 Dec '22

02 Dec '22

Gaia21fgn: long fading tail AM CVn star? YYYYMMDD(UT) mag observer 20220921.5188 19.038zr (ZTF Alert DC mag (Masci+ 2019)) 20220927.5071 19.079zr (ZTF Alert DC mag (Masci+ 2019)) 20220927.5120 19.063zr (ZTF Alert DC mag (Masci+ 2019)) 20220930.5089 18.962zr (ZTF Alert DC mag (Masci+ 2019)) 20220930.5140 19.146zr (ZTF Alert DC mag (Masci+ 2019)) 20220930.5191 19.160zr (ZTF Alert DC mag (Masci+ 2019)) 20221006.5101 19.174zr (ZTF Alert DC mag (Masci+ 2019))

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[vsnet-newvar 9614] ASASSN-VJ000122.44+481658.1 stopped fading
by Taichi Kato 02 Dec '22

02 Dec '22

ASASSN-VJ000122.44+481658.1 stopped fading Entering a standstill?x YYYYMMDD(UT) mag observer 20221105.2897 15.679zr (ZTF Alert DC mag (Masci+ 2019)) 20221111.2710 15.292zr (ZTF Alert DC mag (Masci+ 2019)) 20221113.1855 15.206zg (ZTF Alert DC mag (Masci+ 2019)) 20221113.2618 15.382zr (ZTF Alert DC mag (Masci+ 2019)) 20221115.2063 15.259zg (ZTF Alert DC mag (Masci+ 2019)) 20221115.2581 15.466zr (ZTF Alert DC mag (Masci+ 2019)) 20221117.2062 15.492zg (ZTF Alert DC mag (Masci+ 2019)) 20221117.6044 15.57C (Masayuki Moriyama) 20221119.1634 15.845zr (ZTF Alert DC mag (Masci+ 2019)) 20221119.2817 15.724zg (ZTF Alert DC mag (Masci+ 2019)) 20221119.7136 159C (Masayuki Moriyama) 20221121.1981 15.996zr (ZTF Alert DC mag (Masci+ 2019)) 20221123.1544 16.624zr (ZTF Alert DC mag (Masci+ 2019)) 20221123.2016 16.631zg (ZTF Alert DC mag (Masci+ 2019)) 20221126.6398 167C (Masayuki Moriyama)

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[vsnet-newvar 9613] ASASSN-15cr superoutburst
by Taichi Kato 02 Dec '22

02 Dec '22

ASASSN-15cr superoutburst Known SU UMa star. YYYYMMDD(UT) mag observer 20221121.7529 <153c (Yutaka Maeda) 20221123.610 <175C (Mitsutaka Hiraga) 20221124.7191 <154c (Yutaka Maeda) 20221126.7194 151:c (Yutaka Maeda) 20221126.7194 151:c (Yutaka Maeda) 20221130.592 151C (Mitsutaka Hiraga)

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[vsnet-newvar 9612] [PK2008]J074208.23-104932.4 gradual brightening
by Taichi Kato 01 Dec '22

01 Dec '22

[PK2008]J074208.23-104932.4 gradual brightening This dwarf nova had reached above 13.0 in the past. YYYYMMDD(UT) mag observer 20221005.5002 15.013zr (ZTF Alert DC mag (Masci+ 2019)) 20221008.4836 15.851zg (ZTF Alert DC mag (Masci+ 2019)) 20221010.4899 15.241zr (ZTF Alert DC mag (Masci+ 2019)) 20221013.4609 15.578zg (ZTF Alert DC mag (Masci+ 2019)) 20221013.5001 15.226zr (ZTF Alert DC mag (Masci+ 2019)) 20221015.4612 14.793zg (ZTF Alert DC mag (Masci+ 2019)) 20221019.4810 15.770zg (ZTF Alert DC mag (Masci+ 2019)) 20221019.5041 15.306zr (ZTF Alert DC mag (Masci+ 2019)) 20221022.5029 14.732zr (ZTF Alert DC mag (Masci+ 2019)) 20221026.4375 15.372zg (ZTF Alert DC mag (Masci+ 2019)) 20221030.4831 14.908zr (ZTF Alert DC mag (Masci+ 2019)) 20221106.4168 15.768zg (ZTF Alert DC mag (Masci+ 2019)) 20221106.4566 15.050zr (ZTF Alert DC mag (Masci+ 2019)) 20221112.3987 15.314zr (ZTF Alert DC mag (Masci+ 2019)) 20221114.3749 14.935zr (ZTF Alert DC mag (Masci+ 2019)) 20221115.4397 15.734zg (ZTF Alert DC mag (Masci+ 2019)) 20221115.4706 15.227zr (ZTF Alert DC mag (Masci+ 2019)) 20221117.4821 15.075zg (ZTF Alert DC mag (Masci+ 2019)) 20221118.4619 15.804zg (ZTF Alert DC mag (Masci+ 2019)) 20221118.4824 15.338zr (ZTF Alert DC mag (Masci+ 2019)) 20221119.4603 15.195zg (ZTF Alert DC mag (Masci+ 2019)) 20221119.5044 14.843zr (ZTF Alert DC mag (Masci+ 2019)) 20221121.4650 15.360zr (ZTF Alert DC mag (Masci+ 2019)) 20221123.3418 15.635zg (ZTF Alert DC mag (Masci+ 2019)) 20221123.4403 14.915zr (ZTF Alert DC mag (Masci+ 2019))

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[vsnet-newvar 9611] ATLAS16aee bright outburst
by Taichi Kato 01 Dec '22

01 Dec '22

ATLAS16aee bright outburst First bright outburst and may be a super. YYYYMMDD(UT) mag observer 20221121.2547 17.693zr (ZTF Alert DC mag (Masci+ 2019)) 20221123.2157 17.436zg (ZTF Alert DC mag (Masci+ 2019)) 20221123.2439 17.523zr (ZTF Alert DC mag (Masci+ 2019))

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vsnet-newvar December 2022