January 2023 - vsnet-newvar - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-newvar 9697] PNVJ06245297+0208207: further fading
by Taichi Kato 11 Jan '23

11 Jan '23

PNVJ06245297+0208207: further fading This helium dwarf nova faded to 16 mag on Jan. 10 based on observations by Josch Hambsch. It is expected to brighten again and show superhumps. Please continue your observations.

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[vsnet-newvar 9696] Gaia DR3 6134636930031090560 = ASASSN-23ab
by Taichi Kato 11 Jan '23

11 Jan '23

Gaia DR3 6134636930031090560 = ASASSN-23ab Bright outburst but likely an SS Cyg star. ASASSN-23ab --- ------- 13:8:59.07 -45:8:29.4 2023-01-5.28 11.72 SDSS DSS VIZIER ------- CV candidate, matches to GAIA DR3 G=16.4, g>18.0 on 2023-01-03.07, g=12.1 on 2023-01-05.28, g=13.5 on 2023-01-08.27, g=14.2 on 2023-01-09.11 Outburst in ASAS-3: YYYYMMDD(UT) mag observer 20080509.1397 <14.50V (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397)) 20080511.1244 13.545V (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397)) 20080513.1488 12.515V (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397)) 20080515.1427 13.741V (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397)) 20080517.1655 <14.50V (ASAS (Pojmanski, G. 2002, Acta Astron. 52,397))

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[vsnet-newvar 9695] ASASSN-14im outburst
by Taichi Kato 11 Jan '23

11 Jan '23

ASASSN-14im outburst Large-amplitude variation in quiescence in ZTF data. YYYYMMDD(UT) mag observer 20230107.6142 <150c (Yutaka Maeda) 20230108.5412 <156c (Yutaka Maeda) 20230108.578 <177C (Mitsutaka Hiraga) 20230108.6287 <163C (Masayuki Moriyama) 20230109.5699 152:c (Yutaka Maeda)

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[vsnet-newvar 9694] Gaia23aeh: large-amplitude outburst of a likely premain-sequence star
by Taichi Kato 10 Jan '23

10 Jan '23

Gaia23aeh: large-amplitude outburst of a likely premain-sequence star Could be an FU Ori or EX Lup outburst? http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia23aeh/ Gaia23aeh AT2022aefx 2022-12-17 04:54:00 302.04852 30.98031 17.55 20.17 0.62 unknown 2023-01-09 12:42:53 ~3 mag rise in Gaia source in the galactic plane Gaia: 200811.641 +305849.09 (2000.0) Gaia_DR2_2029961145080697472 plx=-0.230(0.683) dismod=- pmra=-1.089(0.939) pmdec=-5.159(1.185) G=20.254 BP=21.387 RP=18.763 200811.641 +305849.09 (2000.0) Gaia_EDR3_2029961145080697472 plx=0.840(0.516) dismod=10.4 pmra=-2.341(0.446) pmdec=-4.363(0.545) G=20.241 BP=21.646 RP=19.003

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[vsnet-newvar 9693] MGAB-V233 superoutburst continues
by Taichi Kato 10 Jan '23

10 Jan '23

MGAB-V233 superoutburst continues (ER UMa star) Observations of superhumps are desired. YYYYMMDD(UT) mag observer 20221220.5642 <146C (Masayuki Moriyama) 20221225.5481 156C (Masayuki Moriyama) 20230102.5135 152C (Masayuki Moriyama) 20230108.4873 15.40C (Masayuki Moriyama)

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[vsnet-newvar 9692] PNVJ06245297+0208207 rapid fading
by Taichi Kato 10 Jan '23

10 Jan '23

PNVJ06245297+0208207 rapid fading According to observations by Josch Hambsch, this object was rapidly fading on Jan. 9. The behavior is typical for an AM CVn-type outburst. Superhumps will soon appear.

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[vsnet-newvar 9691] MASTER OT J021216.01+461154.5: no superhumps
by Taichi Kato 08 Jan '23

08 Jan '23

MASTER OT J021216.01+461154.5: no superhumps Tonny Vanmunster and Tamas Tordai reported observations on two nights. No superhumps were detected (at least as of now).

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[vsnet-newvar 9690] PNVJ06245297+0208207: no apparent superhumps yet
by Taichi Kato 07 Jan '23

07 Jan '23

PNVJ06245297+0208207: no apparent superhumps yet Tamas Tordai has reported observations. No large-amplitude superhumps were present and this object is likely a helium WZ Sge star with a low inclination.

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[vsnet-newvar 9689] ATLAS17kol likely superoutburst
by Taichi Kato 07 Jan '23

07 Jan '23

ATLAS17kol likely superoutburst Type from ZTF data. http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia23acc/ Gaia23acc AT2023au 2023-01-03 09:45:23 15.52831 1.27574 16.93 CV 2023-01-05 07:21:51 Outburst in confirmed CV

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[vsnet-newvar 9688] ASASSN-15cl likely superoutburst
by Taichi Kato 07 Jan '23

07 Jan '23

ASASSN-15cl likely superoutburst Known SU UMa star. Last superoutburst in 2022 Jan. YYYYMMDD(UT) mag observer 20221231.6265 <152c (Yutaka Maeda) 20230102.5990 <153c (Yutaka Maeda) 20230103.5885 <154c (Yutaka Maeda) 20230104.5834 <140c (Yutaka Maeda) 20230106.508 138 (Rod Stubbings)

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vsnet-newvar January 2023