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

[vsnet-alert 26511] EX Hya outburst
by Hiroyuki Maehara 08 Jan '22

08 Jan '22

Visual magnitude estimates by VSOLJ members object YYYYMMDD(UT) mag code HYAEX 20220108.868 100 Mhh.VSOLJ Observer: Hiroyuki Maehara (Okayama, Japan) Instruments: 30cmL

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[vsnet-alert 26510] V592 Her superoutburst! (since Dec. 24 or earlier)
by Patrick Schmeer 07 Jan '22

07 Jan '22

V592 Herculis (UGWZ) https://www.aavso.org/vsx/index.php?view=detail.top&oid=15403 The current superoutburst started on 2021 December 24 or earlier according to recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) data: https://asas-sn.osu.edu/sky-patrol/coordinate/b56e5c05-0898-48a8-aa17-217f7… In recent decades superoutbursts of V592 Her occurred every 12 years (previous ones in 1986, 1998 and 2010). Clear skies, Patrick ------- Eddy Muyllaert <muyllaert.eddy(a)telenet.be> wrote on 7 January 2022 at 00:03:55 UTC: HERV592 20220106.2444 15.94C OUTBURST! Open University COAST Regards, Eddy

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[vsnet-alert 26509] GP CVn superoutburst
by Taichi Kato 07 Jan '22

07 Jan '22

GP CVn superoutburst UGSU+E. Last superoutburst in 2021 Feb.-Mar. YYYYMMDD(UT) mag observer 20211213.7983 <153c (Yutaka Maeda) 20211214.7957 <154c (Yutaka Maeda) 20211221.8288 <148c (Yutaka Maeda) 20211222.8169 <156c (Yutaka Maeda) 20211223.8388 <159c (Yutaka Maeda) 20220103.7934 154:c (Yutaka Maeda) 20220106.226 16.04C (Gary Poyner)

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[vsnet-alert 26508] V592 Her rare outburst
by Taichi Kato 07 Jan '22

07 Jan '22

V592 Her rare outburst WZ Sge star. Last superoutburst in 2010. YYYYMMDD(UT) mag observer 20211031.4099 <166C (Masayuki Moriyama) 20211031.7653 <139 (Eddy Muyllaert) 20211101.4343 <164C (Masayuki Moriyama) 20211101.7618 <139 (Eddy Muyllaert) 20211101.7743 <142 (Jose Ripero) 20211102.7646 <139 (Eddy Muyllaert) 20211103.4232 <170C (Masayuki Moriyama) 20211105.7590 <139 (Eddy Muyllaert) 20211107.4103 <160C (Masayuki Moriyama) 20211108.7708 <142 (Jose Ripero) 20211115.4106 <156C (Masayuki Moriyama) 20211118.4076 <156C (Masayuki Moriyama) 20211222.8923 <133c (Yutaka Maeda) 20220103.8978 <138c (Yutaka Maeda) 20220106.2444 15.94C (Eddy Muyllaert)

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[vsnet-alert 26507] MASTER OT J042609.34+354144.8 superhumps
by Taichi Kato 06 Jan '22

06 Jan '22

MASTER OT J042609.34+354144.8 superhumps Kiyota-san detected large-amplitude superhumps on Jan. 4. Superhumps were apparently growing on Jan. 3.

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[vsnet-alert 26501] MASTER OT J030227.28+191754.5: stage A superhumps, eventually
by Taichi Kato 05 Jan '22

05 Jan '22

MASTER OT J030227.28+191754.5: stage A superhumps, eventually The most recent data by Tonny Vanmunster, Tamas Tordai and Itoh-san have recorded emerging ordinary superhumps since 2021 Dec. 30 -- 32 d after the outburst detection! (The longest record, probably related to the large outburst amplitude). The period of stage A superhumps is 0.0616(2) d (2-d baseline). The period of early superhumps is 0.059851(5) d. The corresponding mass ratio is 0.076(10), which will be updated as more observations become available. This value corresponds to a "borderline" period bouncer. List of observers and numbers of measurements: Code Mode Corr SD Obs OKU B -0.401 0.051 1503 KU1 CV -0.427 0.044 19437 Van CV -0.503 0.022 512 KU1 V -0.281 0.038 8153 Ioh C -0.283 0.050 20707 Trt V -0.291 0.030 358 HaC CV -0.242 0.067 262 KU1 Ic 0.012 0.033 109 KU1 Rc -0.051 0.026 119 KU1 B -0.424 0.024 118 Kis C -0.380 0.060 1812 Vih V -0.282 0.032 242 Vih Ic -0.001 0.030 245 Trt CV -0.207 0.031 1440 RFD V -0.173 0.014 175 OKU C 12.103 0.059 1539 GCH CV -0.457 0.018 7

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[vsnet-alert 26505] TV Crv superhumps
by Taichi Kato 05 Jan '22

05 Jan '22

TV Crv superhumps Itoh-san detected superhumps.

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[vsnet-alert 26504] ASASSN-19za possible superoutburst
by Taichi Kato 03 Jan '22

03 Jan '22

ASASSN-19za possible superoutburst Gaia22aau AT2019slj 2022-01-01 15:22:10 350.07709 49.32948 15.14 18.99 0.72 CV 2022-01-03 14:16:29 ~5 mag outburst in confirmed CV ASASSN-19za, spectrum on TNS http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia22aau/ Observations on two nights during the 2019 superoutbursts.

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[vsnet-alert 26502] MASTER OT J042609.34+354144.8 bright outburst
by Denis Denisenko 03 Jan '22

03 Jan '22

This SU UMa type dwarf nova in Perseus is in outburst on the latest image from Open University's COAST telescope installed on Teide, Tenerife. COAST Mark III is 0.42-m f/6.8 CDK17 Dall-Kirkham with FLI ProLine KAF-09000 CCD. MASTER OT J042609.34+354144.8 20211122.3276 16.38r ZTF Lasair 20211212.9034 16.12CV COAST 20211213.4163 16.30o ATLAS (Tonry et al.) 20211221.5314 16.15o ATLAS 20211223.5042 15.84o ATLAS 20211225.3864 16.28o ATLAS 20211226.3844 16.50o ATLAS last observartion before outburst 20211227.9386 15.93CV COAST 20220103.0572 13.29CV COAST Outburst! ZTF Lasair real-time data https://lasair.roe.ac.uk/object/ZTF17aabuvss/ has not been updated since 2021 Nov. 22 (MJD=59540). The light curve from Zwicky Transient Facility (Masci et al., 2019) Data Release 8: http://scan.sai.msu.ru/~denis/J0426+3541-ZTF-DR8-LC.gif Light curve from ATLAS forced photometry server (Tonry et al., 2018): http://scan.sai.msu.ru/~denis/J0426+3541-ATLAS-LC.gif Note the long-term variations of the quiescent level. Fourth body in the system? Third body is apparently too far away (16.6" at 186 pc is about 3000 AU, or 100x Sun-Neptune distance) to cause perturbations on a few years time scale. Denis Denisenko

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[vsnet-alert 26500] TV Crv superoutburst (since Dec. 29)
by Patrick Schmeer 02 Jan '22

02 Jan '22

TV Corvi (UGSU) https://www.aavso.org/vsx/index.php?view=detail.top&oid=10699 From "activity at a glance (Jan 02)" (Taichi Kato, vsnet-outburst 28168): 20211229.671 132 (Rod Stubbings) 20211230.1675 13.37C (Masao Funada) 20211230.669 134 (Rod Stubbings) 20211231.3199 13.52C (Masao Funada) The current superoutburst started between 2021 December 24 and 29 according to recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) data: https://asas-sn.osu.edu/sky-patrol/coordinate/80b95890-7fe5-4e17-80aa-85d9b… Normal outbursts were observed from 2021 February 16 to 18 and from July 5 to 7. Time-resolved photometry is encouraged. Clear skies, Patrick

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