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[vsnet-campaign-dn 16039] ASASSN-14lb: new SU UMa-type dwarf nova
by tonny.vanmunster＠gmail.com 09 Oct '21

09 Oct '21

Dear colleagues, I have just finished analysing my unfiltered CMOS observations of ASASSN-14lb, obtained on 2021, October 08/09 at CBA Belgium Observatory, using a 0.40-m f/10.0 telescope and QHY-268M CMOS camera under clear skies. My observations were triggered by [vsnet-alert 26304]. Regular superhumps with an amplitude of 0.28 mag are clearly visible in the resulting light curve, establishing ASASSN-14lb as a new SU UMa-type dwarf nova. A period analysis using the ANOVA, Lomb-Scargle, … [View More]

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[vsnet-campaign-dn 15985] LL And outburst
by Taichi Kato 09 Oct '21

09 Oct '21

LL And outburst Of course, this is a top-priority target! The 2004 superoutburst occurred in June and no good observations were reported. See https://ui.adsabs.harvard.edu/abs/2004PASJ...56S.135K/abstract for the 1993 superoutburst. Determination of the superhump period is very important. YYYYMMDD(UT) mag observer 20210908.9111 <139 (Eddy Muyllaert) 20210909.701 <153 (Hiroyuki Maehara) 20210909.9424 <146 (Eddy Muyllaert) 20210910.219 <17.90C (Gary Poyner) … [View More]

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[vsnet-campaign-dn 16037] V701 Tau likely superoutburst
by Taichi Kato 08 Oct '21

08 Oct '21

V701 Tau likely superoutburst Superoutburst expected now. YYYYMMDD(UT) mag observer 20210928.7483 <164c (Yutaka Maeda) 20211001.6187 <155c (Yutaka Maeda) 20211002.6199 <157c (Yutaka Maeda) 20211003.6558 <161c (Yutaka Maeda) 20211004.0138 <163C (Masao Funada) 20211004.6114 <153c (Yutaka Maeda) 20211005.6009 <156c (Yutaka Maeda) 20211006.5957 151c (Yutaka Maeda)

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[vsnet-campaign-dn 16036] MASTER OT J174816.22+501723.3 superoutburst
by Taichi Kato 08 Oct '21

08 Oct '21

MASTER OT J174816.22+501723.3 superoutburst YYYYMMDD(UT) mag observer 20210924.4265 <162c (Yutaka Maeda) 20211001.1563 19.704zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211001.4063 <159c (Yutaka Maeda) 20211002.4068 152:cG (Yutaka Maeda) 20211003.1365 15.745zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20211003.4050 156:c (Yutaka Maeda) 20211003.8547 15.55C (Masao Funada) 20211004.4200 <148c (Yutaka Maeda) 20211005.4050 152:cG (Yutaka Maeda)… [View More]

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[vsnet-campaign-dn 16035] HV Aur superoutburst
by Taichi Kato 08 Oct '21

08 Oct '21

HV Aur superoutburst YYYYMMDD(UT) mag observer 20210928.7783 <163c (Yutaka Maeda) 20211001.6479 <156c (Yutaka Maeda) 20211002.6480 <160c (Yutaka Maeda) 20211003.6839 145cG (Yutaka Maeda) 20211004.6395 146cG (Yutaka Maeda) 20211005.041 15.06C (Gary Poyner) 20211005.0416 15.03C (Masao Funada) 20211005.6288 152:cG (Yutaka Maeda) 20211006.038 15.35C (Gary Poyner) 20211006.6234 151c (Yutaka Maeda)

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[vsnet-campaign-dn 16034] ASASSN-14lb rare outburst
by Taichi Kato 08 Oct '21

08 Oct '21

ASASSN-14lb rare outburst Last seen in outburst on 2018 Sep. 16 (17.0 mag). YYYYMMDD(UT) mag observer 20210918.7208 <155c (Yutaka Maeda) 20210919.7449 <155c (Yutaka Maeda) 20210923.6947 <165c (Yutaka Maeda) 20210924.6981 <154c (Yutaka Maeda) 20210928.7029 <169c (Yutaka Maeda) 20211001.6734 <156c (Yutaka Maeda) 20211002.6735 <157c (Yutaka Maeda) 20211003.7093 <163c (Yutaka Maeda) 20211004.6647 158:c (Yutaka Maeda) 20211005.6540 160c (… [View More]

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[vsnet-campaign-dn 16033] GK Per up to now (corrected)
by Taichi Kato 08 Oct '21

08 Oct '21

GK Per up to now (corrected) YYYYMMDD(UT) mag observer 20210918.7347 128cG (Yutaka Maeda) 20210919.1596 12.90C (Masao Funada) 20210920.9097 130 (Eddy Muyllaert) 20210921.969 128 (Gary Poyner) 20210922.7331 129cG (Yutaka Maeda) 20210922.9306 130 (Eddy Muyllaert) 20210923.7340 126cG (Yutaka Maeda) 20210923.9222 129 (Eddy Muyllaert) 20210924.017 129 (Gary Poyner) 20210924.7380 128cG (Yutaka Maeda) 20210925.974 12.98C (Gary Poyner) 20210926.4269 13.… [View More]

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[vsnet-campaign-dn 16031] GK Per up to now (corrected)
by Taichi Kato 07 Oct '21

07 Oct '21

GK Per up to now (corrected) YYYYMMDD(UT) mag observer 20210918.7347 128cG (Yutaka Maeda) 20210919.1596 12.90C (Masao Funada) 20210920.9097 130 (Eddy Muyllaert) 20210921.969 128 (Gary Poyner) 20210922.7331 129cG (Yutaka Maeda) 20210922.9306 130 (Eddy Muyllaert) 20210923.7340 126cG (Yutaka Maeda) 20210923.9222 129 (Eddy Muyllaert) 20210924.017 129 (Gary Poyner) 20210924.7380 128cG (Yutaka Maeda) 20210925.974 12.98C (Gary Poyner) 20210926.4269 13.… [View More]

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[vsnet-campaign-dn 16030] SW UMa in outburst (since Oct. 5)
by Patrick Schmeer 06 Oct '21

06 Oct '21

SW Ursae Majoris (UGSU) https://www.aavso.org/vsx/index.php?view=detail.top&oid=37127 H. Maehara wrote (vsnet-outburst 27790, see below): > Hirosawa-san has reported an outburst of SW UMa ... The current outburst began shortly before 2021 October 5.558 UT according to recent ASAS-SN Sky Patrol data: https://asas-sn.… [View More]

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[vsnet-campaign-dn 16029] V374 Lac fading
by Taichi Kato 06 Oct '21

06 Oct '21

V374 Lac fading Z Cam+VY Scl (ZTF data) http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia21elj/ Gaia21elj AT2021aanw 2021-09-18 13:28:33 341.02428 43.75898 18.81 16.15 0.28 CV 2021-10-05 12:13:09 known CV V374 Lac fades by 3 mag

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