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[vsnet-campaign-dn 15943] MASTER OT J052622.61+734629.7: new SU UMa-type dwarf nova
by tonny.vanmunster＠gmail.com 04 Sep '21

04 Sep '21

Dear colleagues, I have just finished analysing my unfiltered CMOS observations of MASTER OT J052622.61+734629.7, obtained on 2021, September 03/04 at CBA Belgium Observatory, using a 0.40-m f/10.0 telescope and QHY-268M CMOS camera under clear skies. Regular superhumps with an amplitude of 0.29 mag are clearly visible in the resulting light curve, establishing MASTER OT J052622.61+734629.7 as a new SU UMa-type dwarf nova. A period analysis using the ANOVA, Lomb-Scargle, Generalized-Lomb-Scargle and PDM methods (Peranso 3.0), yields a combined superhump period of 0.0665 +/- 0.0003d. The object was at mag CV = 16.2 on Sep 04th. I will send my observations to AAVSO, CBA and VSNET for further analysis. Best regards Tonny --- Tonny Vanmunster CBA Belgium Observatory CBA Extremadura Observatory http://www.cbabelgium.com PERANSO : The Light Curve and Period Analysis Software http://www.peranso.com

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[vsnet-campaign-dn 15942] GV Psc superoutburst
by Taichi Kato 03 Sep '21

03 Sep '21

GV Psc superoutburst YYYYMMDD(UT) mag observer 20210819.8382 <157C (Masayuki Moriyama) 20210827.6968 144cG (Yutaka Maeda) 20210828.3626 14.328zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210828.4350 14.543zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210828.7488 146:c (Yutaka Maeda) 20210829.7482 144cG (Yutaka Maeda) 20210830.3472 14.47C (Masao Funada) 20210830.7361 143cG (Yutaka Maeda) 20210831.7216 145cG (Yutaka Maeda)

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[vsnet-campaign-dn 15941] MASTER OT J052622.61+734629.7 rare outburst
by Taichi Kato 03 Sep '21

03 Sep '21

MASTER OT J052622.61+734629.7 rare outburst YYYYMMDD(UT) mag observer 20210828.8371 <157c (Yutaka Maeda) 20210829.8363 157:c (Yutaka Maeda) 20210830.8214 157:c (Yutaka Maeda) 20210831.1772 15.96C (Masao Funada) 20210831.8063 153:cG (Yutaka Maeda)

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[vsnet-campaign-dn 15940] CRTS J221232.0+160140 possible superoutburst
by Taichi Kato 03 Sep '21

03 Sep '21

CRTS J221232.0+160140 possible superoutburst Superoutburst in 2011 May. Interval too short? YYYYMMDD(UT) mag observer 20210805.7168 <158c (Yutaka Maeda) 20210814.3037 20.013zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210828.7130 <138c (Yutaka Maeda) 20210829.5883 <166c (Yutaka Maeda) 20210831.5707 144:cG (Yutaka Maeda)

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[vsnet-campaign-dn 15939] ASASSN-16le superoutburst
by Taichi Kato 03 Sep '21

03 Sep '21

ASASSN-16le superoutburst YYYYMMDD(UT) mag observer 20210827.3213 18.485zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210827.7990 <159c (Yutaka Maeda) 20210828.5421 152cG (Yutaka Maeda) 20210829.3264 15.112zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20210829.6670 149cG (Yutaka Maeda) 20210829.9969 15.23C (Masao Funada) 20210831.6486 150:cG (Yutaka Maeda)

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[vsnet-campaign-dn 15938] ASASSN-19wz possible superoutburst
by Taichi Kato 03 Sep '21

03 Sep '21

ASASSN-19wz possible superoutburst Past ZTF data suggest an SU UMa star (possible superoutburst in 2020 Nov.). YYYYMMDD(UT) mag observer 20210901.2558 15.276zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-campaign-dn 15937] Gaia21ebn
by Taichi Kato 02 Sep '21

02 Sep '21

Gaia21ebn http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia21ebn/ Gaia21ebn AT2021xmg 2021-08-30 05:31:01 231.85226 49.65244 15.62 20.80 0.14 unknown 2021-09-01 21:10:07 ~5.5 mag outburst in Gaia source, candidate CV 152724.549 +493908.75 (2000.0) Gaia_DR2_1594504929308679936 plx=1.466(2.309) dismod=9.2 pmra=-29.339(3.569) pmdec=-6.083(2.522) G=20.762 BP=20.771 RP=20.492 152724.548 +493908.75 (2000.0) Gaia_EDR3_1594504929308679936 plx=0.787(1.051) dismod=10.5 pmra=-24.946(1.010) pmdec=-2.408(1.109) G=20.719 BP=20.769 RP=20.379 152724.599 +493908.96 (2000.0) GALEX_DR5_6374961960421690918 NUV=22.040(0.429) FUV=-(-)

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[vsnet-campaign-dn 15935] Gaia21dzx
by Taichi Kato 31 Aug '21

31 Aug '21

Gaia21dzx Most likely a large-amplitude dwarf nova. http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia21dzx/ Gaia21dzx AT2021xgr 2021-08-26 21:58:43 286.00866 -35.39330 15.00 unknown 2021-08-30 23:17:11 apparently hostless transient 190402.108 -352336.26 (2000.0) GALEX_DR5_6383934048320887191 NUV=20.335(0.149) FUV=19.657(0.107)

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[vsnet-campaign-dn 15934] NSV 1440 likely superoutburst
by Patrick Schmeer 30 Aug '21

30 Aug '21

NSV 1440 (AM CVn star) Orbital period: 0.0252329 d (36.3354 min) https://www.aavso.org/vsx/index.php?view=detail.top&oid=40064 A precursor outburst was recorded on 2021 August 26, according to recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) light curve and data: https://asas-sn.osu.edu/sky-patrol/coordinate/7915bb9f-d7c9-4e0c-b378-02749… The most recently observed superoutburst occurred in 2019 February. Time-resolved photometry is urgently required. Clear skies, Patrick ------- Am Montag, 30. August 2021, 18:23:06 MESZ hat Rod Stubbings Folgendes geschrieben: The AM CVn-type object NSV 1440 is in bright outburst. NSV 1440 210830.519 129 -- Rod Stubbings Tetoora Road Observatory Victoria, Australia Telescope: "Infinity" 22" f/3.8 stubbo(a)dcsi.net.au http://rodstubbingsobservatory.wordpress.com/

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[vsnet-campaign-dn 15933] ASASSN-21qg: new SU UMa-type dwarf nova
by Taichi Kato 30 Aug '21

30 Aug '21

ASASSN-21qg: new SU UMa-type dwarf nova Berto Monard and Josch Hambsch have reported observations. This object shows superhumps with a period of 0.05539(5) d since Aug. 26.

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