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

[vsnet-alert 26215] V394 Aps possible superoutburst
by Taichi Kato 08 Sep '21

08 Sep '21

V394 Aps possible superoutburst Possible SU UMa-type behavior in the past ASAS-SN data. YYYYMMDD(UT) mag observer 20210611.3269 <156C (Masao Funada) 20210618.2848 16.09C (Masao Funada) 20210618.578 158 (Rod Stubbings) 20210619.719 <158 (Rod Stubbings) 20210629.2153 175C (Masao Funada) 20210707.491 150 (Rod Stubbings) 20210901.469 141 (Rod Stubbings) 20210902.474 140 (Rod Stubbings)

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[vsnet-alert 26214] OT J231110.9+013003 likely superoutburst
by Taichi Kato 08 Sep '21

08 Sep '21

OT J231110.9+013003 likely superoutburst Long-lasting and slowly fading outburst. Large outburst amplitude. Time-resolved photometry is encouraged. YYYYMMDD(UT) mag observer 20210803.6893 <157c (Yutaka Maeda) 20210805.7608 <166c (Yutaka Maeda) 20210827.8169 142cG (Yutaka Maeda) 20210828.3387 14.899zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210828.3673 14.559zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210828.5598 143cG (Yutaka Maeda) … [View More]

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[vsnet-alert 26213] SDSS J172102.48+273301.2 (AM CVn) dip after short superoutburst
by Taichi Kato 08 Sep '21

08 Sep '21

SDSS J172102.48+273301.2 (AM CVn) dip after short superoutburst YYYYMMDD(UT) mag observer 20210831.2081 19.372zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210903.2167 16.261zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210905.2264 16.557zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210905.2765 16.267zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210907.1802 18.617zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26212] MGAB-V258 possible superoutburst
by Taichi Kato 08 Sep '21

08 Sep '21

MGAB-V258 possible superoutburst YYYYMMDD(UT) mag observer 20210823.4701 19.445zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210825.4670 20.335zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210827.4496 20.419zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210827.4498 20.419zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210902.4561 17.734zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210902.4838 17.537zr (Zwicky Transient Facility Lasair … [View More]

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[vsnet-alert 26211] ASASSN-18hr likely superoutburst
by Taichi Kato 08 Sep '21

08 Sep '21

ASASSN-18hr likely superoutburst Suspected ER UMa star. YYYYMMDD(UT) mag observer 20210821.2250 18.820zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210821.3013 18.577zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210824.2447 16.184zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210824.3044 16.310zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210826.2604 16.232zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210826.2979 16.199zg (Zwicky … [View More]

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[vsnet-alert 26210] Re: ASASSN-21nv: at least four rebrightenings
by Taichi Kato 07 Sep '21

07 Sep '21

Re: ASASSN-21nv: at least four rebrightenings > The (super?)outburst started on 2021 July 27. A rapid fading began on August 23. > Short rebrightenings were recorded on August 27 and 30, and on September 2 and 4. > (according to ZTF, ATLAS and ASAS-SN data) Look like a short rebrightening and a long one (according to ZTF Lasair). ASAS-SN data are noisy (fainter thans around positive detections).

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[vsnet-alert 26209] ASASSN-21nv: at least four rebrightenings
by Patrick Schmeer 06 Sep '21

06 Sep '21

ASASSN-21nv (UGWZ:) https://www.aavso.org/vsx/index.php?view=detail.top&oid=2223860 ZTF light curve, data, and images (via Lasair): https://lasair.roe.ac.uk/object/ZTF21abouwjj/ Recent ASAS-SN Sky Patrol light curve and data: https://asas-sn.osu.edu/sky-patrol/coordinate/dc7c9a1a-df53-4dd2-8866-99e32… The (super?)outburst started on 2021 July 27. A rapid fading&… [View More]

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[vsnet-alert 26207] MASTER OT J052622.61+734629.7: new SU UMa-type dwarf nova
by Taichi Kato 06 Sep '21

06 Sep '21

MASTER OT J052622.61+734629.7: new SU UMa-type dwarf nova Tamas Tordai and Josch Hambsch have reported observations. The object shows superhumps with a period of 0.06549(4) d and an amplitude of 0.28 mag.

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[vsnet-alert 26206] ASASSN-V J205543.90+240033.5: true period
by Taichi Kato 06 Sep '21

06 Sep '21

ASASSN-V J205543.90+240033.5 (AR Sco-like object): true period After an analysis of the ZTF data, I reached a conclusion that the true period is 0.523490(1) d. All the data can be well expressed by this period and the profile is sinusoidal (reflection type). The 10.803 d period I reported appears to be its alias. The initially reported 0.2-d period was caused by the incomplete phase coverage. Now this object looks even more similar to AR Sco (Porb=0.14853528 d, spin=1.95 min). I will … [View More]

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[vsnet-alert 26205] ASASSN-21qi: new SU UMa-type dwarf nova
by Taichi Kato 06 Sep '21

06 Sep '21

ASASSN-21qi: new SU UMa-type dwarf nova Berto Monard has reported observations. The object has been showing superhump (amplitude 0.18 mag) since Aug. 26. The period is 0.06141(2) d allowing aliases (alias still not selected due to the limited coverage).

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