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

[vsnet-alert 26218] ASASSN-14av most likely superoutburst
by Taichi Kato 09 Sep '21

09 Sep '21

ASASSN-14av most likely superoutburst Supercycle about a year (ZTF data). YYYYMMDD(UT) mag observer 20210809.2601 20.565zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210810.6288 <146c (Yutaka Maeda) 20210812.3276 19.767zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210812.3278 19.767zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210814.3113 20.126zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210814.3115 20.126zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210816.3470 20.346zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210821.2774 20.184zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210821.2776 20.184zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210824.3486 19.177zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210827.2218 16.096zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210827.2220 16.096zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210827.2840 16.287zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210827.2841 16.287zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210827.7534 <150c (Yutaka Maeda) 20210829.2441 16.163zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210829.2443 16.163zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210829.2627 16.342zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210829.2628 16.342zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210829.5507 <156c (Yutaka Maeda) 20210831.5332 <152c (Yutaka Maeda) 20210902.2438 16.715zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210902.2808 16.511zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210904.1715 16.805zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210904.1717 16.805zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210904.2142 16.508zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210904.2144 16.508zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26217] 1RXS J185310.0+594509 superoutburst
by Taichi Kato 09 Sep '21

09 Sep '21

1RXS J185310.0+594509 superoutburst YYYYMMDD(UT) mag observer 20210829.2269 18.850zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210829.2271 18.850zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210829.5333 <150c (Yutaka Maeda) 20210830.5219 <149c (Yutaka Maeda) 20210831.5156 <156c (Yutaka Maeda) 20210903.3050 18.361zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210903.3052 18.361zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210903.3265 17.899zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210903.3267 17.899zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210905.2985 14.947zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210905.3624 15.207zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210906.889 151C (Jeremy Shears) 20210907.2401 14.996zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210907.3014 15.232zr (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-alert 26216] AB Nor superoutburst
by Taichi Kato 08 Sep '21

08 Sep '21

AB Nor superoutburst YYYYMMDD(UT) mag observer 20210829.426 <154 (Rod Stubbings) 20210830.438 143 (Rod Stubbings) 20210901.474 146 (Rod Stubbings) 20210902.433 145 (Rod Stubbings) 20210906.458 147 (Rod Stubbings) 20210907.423 147 (Rod Stubbings)

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[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) 20210829.2823 14.987zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210905.3153 15.355zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210905.3738 15.604zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210906.2940 15.639zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210906.3376 15.494zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210907.2633 15.547zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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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 (Masci+ 2019)) 20210904.4502 17.657zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210904.4504 17.657zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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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 Transient Facility Lasair (Masci+ 2019)) 20210828.2131 16.321zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210828.2630 16.681zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210901.2677 16.462zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210903.2863 16.769zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210905.2440 17.136zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210905.2575 16.901zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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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 07 Sep '21

07 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 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) Time-resolved photometry was performed by Tonny Vanmunster (VMT) during six observing sessions (July 30 - Aug. 3 and Aug. 10 UT); no superhumps were detected: https://app.aavso.org/webobs/results/?star=ASASSN-21nv Follow-up observations are encouraged. 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 Asteroid Terrestrial-impact Last Alert System (ATLAS): - Tonry et al., 2018PASP..130f4505T Lasair: - Smith et al., 2019RNAAS...3...26S Zwicky Transient Facility (ZTF): - Masci et al., 2019PASP..131a8003M

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