- vsnet-campaign-dn - ooruri.kusastro.kyoto-u.ac.jp

[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 13.73B (Seiichiro Kiyota) 20210926.4273 12.83V (Seiichiro Kiyota) 20210927.9174 130 (Eddy Muyllaert) 20210928.3782 13.92B (Seiichiro Kiyota) 20210928.3786 12.83V (Seiichiro Kiyota) 20210928.7417 128cG (Yutaka Maeda) 20211001.6128 126cG (Yutaka Maeda) 20211001.816 130 (Hiroyuki Maehara) 20211002.6139 126cG (Yutaka Maeda) 20211003.4589 128V (Robert Fidrich) 20211003.528 128 (Hiroyuki Maehara) 20211003.6414 12.42C (Masayuki Moriyama) 20211003.6426 12.55V (Masayuki Moriyama) 20211003.6437 11.90Rc (Masayuki Moriyama) 20211003.6446 11.32Ic (Masayuki Moriyama) 20211003.6465 13.46B (Masayuki Moriyama) 20211003.6498 125cG (Yutaka Maeda) 20211003.776 128V (Pavol A. Dubovsky) 20211003.815 132 (Tsuneo Horie) 20211003.826 129 (Gary Poyner) 20211003.940 12.78V (Jose Prieto) 20211003.9444 108 (Jose Ripero) 20211003.992 12.82C (Gary Poyner) 20211004.6055 128cG (Yutaka Maeda) 20211004.826 132 (Tsuneo Horie) 20211005.038 12.98C (Gary Poyner) 20211005.0384 12.99C (Masao Funada) 20211005.0569 130 (Robert Fidrich) 20211005.5949 128cG (Yutaka Maeda) 20211006.032 130 (Gary Poyner) 20211006.103 129 (Klaus Wenzel) 20211006.5897 127cG (Yutaka Maeda)

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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 13.73B (Seiichiro Kiyota) 20210926.4273 12.83V (Seiichiro Kiyota) 20210927.9174 130 (Eddy Muyllaert) 20210928.3782 13.92B (Seiichiro Kiyota) 20210928.3786 12.83V (Seiichiro Kiyota) 20210928.7417 128cG (Yutaka Maeda) 20211001.6128 126cG (Yutaka Maeda) 20211001.816 130 (Hiroyuki Maehara) 20211002.6139 126cG (Yutaka Maeda) 20211003.4589 128V (Robert Fidrich) 20211003.528 128 (Hiroyuki Maehara) 20211003.6414 12.42C (Masayuki Moriyama) 20211003.6426 12.55V (Masayuki Moriyama) 20211003.6437 11.90Rc (Masayuki Moriyama) 20211003.6446 11.32Ic (Masayuki Moriyama) 20211003.6465 13.46B (Masayuki Moriyama) 20211003.6498 125cG (Yutaka Maeda) 20211003.776 128V (Pavol A. Dubovsky) 20211003.815 132 (Tsuneo Horie) 20211003.826 129 (Gary Poyner) 20211003.940 12.78V (Jose Ripero) 20211003.9444 108 (Jose Prieto) 20211003.992 12.82C (Gary Poyner) 20211004.6055 128cG (Yutaka Maeda) 20211004.826 132 (Tsuneo Horie) 20211005.038 12.98C (Gary Poyner) 20211005.0569 130 (Robert Fidrich) 20211006.103 129 (Klaus Wenzel)

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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.osu.edu/sky-patrol/coordinate/22d13753-1a79-4a41-90c0-2e3da… UMASW 20211002.590 16.568g ASN UMASW 20211005.558 12.255g ASN UMASW 20211005.559 12.261g ASN UMASW 20211005.560 12.251g ASN UMASW 20211006.578 10.998g ASN UMASW 20211006.579 10.994g ASN UMASW 20211006.581 10.988g ASN UMASW 20211006.628 11.019g ASN UMASW 20211006.629 11.016g ASN UMASW 20211006.631 11.006g ASN AAVSO data: https://app.aavso.org/webobs/results/?star=000-BBP-799 ZTF light curves, data, and images (via Lasair): https://lasair.roe.ac.uk/object/ZTF18accnopc https://lasair.roe.ac.uk/object/ZTF20acntest A previous (super?)outburst was observed in 2020 June. Time-resolved photometry is 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 Lasair: - Smith et al., 2019RNAAS...3...26S Zwicky Transient Facility (ZTF): - Masci et al., 2019PASP..131a8003M ------------ Hiroyuki Maehara wrote on Tuesday, 5 October 2021 at 23:25:58 UTC: Hirosawa-san has reported an outburst of SW UMa. CCD magnitude estimates by VSOLJ members object YYYYMMDD(UT) mag code UMASW 20211005.79971 10.88cG Hsk.VSOLJ Observer: Kenji Hirosawa (Aichi, Japan) Instruments: 20cmL + CANON EOS Kiss X9

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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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[vsnet-campaign-dn 16022] DW Cnc outburst
by Taichi Kato 06 Oct '21

06 Oct '21

DW Cnc outburst Maeda-san reported 11.3 mag on 20211004.83223 [vsnet-outburst 27783] outburst for the firsttime since 2007 !!

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[vsnet-campaign-dn 16027] DW Cnc up to now
by Taichi Kato 05 Oct '21

05 Oct '21

DW Cnc up to now YYYYMMDD(UT) mag observer 20210919.8152 <135cG (Yutaka Maeda) 20210924.572 15.243g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20210927.8600 <125c (Yutaka Maeda) 20210929.8449 153:cG (Yutaka Maeda) 20211001.7953 148:cG (Yutaka Maeda) 20211001.840 <145 (Hiroyuki Maehara) 20211001.8588 <130cG (Yutaka Maeda) 20211002.7941 152:c (Yutaka Maeda) 20211002.837 <146 (Hiroyuki Maehara) 20211004.422 14.565g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20211004.424 14.554g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20211004.424 14.480g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20211004.8322 113cG (Yutaka Maeda)

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[vsnet-campaign-dn 16026] GK Per up to now (update)
by Taichi Kato 05 Oct '21

05 Oct '21

GK Per up to now (update) YYYYMMDD(UT) mag observer 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 13.73B (Seiichiro Kiyota) 20210926.4273 12.83V (Seiichiro Kiyota) 20210927.9174 130 (Eddy Muyllaert) 20210928.3782 13.92B (Seiichiro Kiyota) 20210928.3786 12.83V (Seiichiro Kiyota) 20210928.7417 128cG (Yutaka Maeda) 20211001.6128 126cG (Yutaka Maeda) 20211001.816 130 (Hiroyuki Maehara) 20211002.6139 126cG (Yutaka Maeda) 20211003.4589 128V (Robert Fidrich) 20211003.528 128 (Hiroyuki Maehara) 20211003.6414 12.42C (Masayuki Moriyama) 20211003.6426 12.55V (Masayuki Moriyama) 20211003.6437 11.90Rc (Masayuki Moriyama) 20211003.6446 11.32Ic (Masayuki Moriyama) 20211003.6465 13.46B (Masayuki Moriyama) 20211003.6498 125cG (Yutaka Maeda) 20211003.776 128V (Pavol A. Dubovsky) 20211003.815 132 (Tsuneo Horie) 20211003.826 129 (Gary Poyner) 20211003.940 12.78V (Jose Ripero) 20211003.9444 108 (Jose Ripero) 20211003.992 12.82C (Gary Poyner) 20211004.6055 128cG (Yutaka Maeda) 20211004.826 132 (Tsuneo Horie) 20211005.038 12.98C (Gary Poyner) 20211005.0569 130 (Robert Fidrich)

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[vsnet-campaign-dn 16025] ASASSN-21so: new SU UMa-type dwarf nova
by Taichi Kato 05 Oct '21

05 Oct '21

ASASSN-21so: new SU UMa-type dwarf nova Tamas Tordai has reported observations. The object showed 0.3-mag superhumps. The period appears to be shorter than 0.06 d.

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[vsnet-campaign-dn 16023] GK Per up to now
by Taichi Kato 05 Oct '21

05 Oct '21

GK Per up to now YYYYMMDD(UT) mag observer 20210915.9292 130 (Eddy Muyllaert) 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) 20210927.9174 130 (Eddy Muyllaert) 20211001.816 130 (Hiroyuki Maehara) 20211003.4589 128V (Robert Fidrich) 20211003.528 128 (Hiroyuki Maehara) 20211003.776 128V (Pavol A. Dubovsky) 20211003.9444 108 (Jose Ripero) 20211003.992 12.82C (Gary Poyner)

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[vsnet-campaign-dn 16018] GK Per (Nova 1901, intermediate polar) in outburst (since Oct. 2)
by Patrick Schmeer 03 Oct '21

03 Oct '21

GK Persei (NA+UG+NLDQ) Orbital period: 1.996803 d White dwarf spin period: 0.0040625 d = 5.85 min = 351 s https://www.aavso.org/vsx/index.php?view=detail.top&oid=25717 Beginning of the brightening noticed yesterday during my regular check of ASAS-SN Sky Patrol data. https://asas-sn.osu.edu/sky-patrol/coordinate/485c8c41-e472-4da9-ab5c-c42c0… I then checked the latest AAVSO data, but the latest observation was (and still is) from 2021 Sept. 30.935 UT: https://app.aavso.org/webobs/results/?star=000-BBG-044 No visual confirmation by me due to bad weather last night. The latest ZTF observation is from 2021 Sept. 14.384 UT: https://lasair.roe.ac.uk/object/ZTF18abnzukj/ The beginning outburst was also noted by Y. Maeda (Oct. 2.613 UT, mag. 126cG; see vsnet-outburst 27777). The previous dwarf nova outburst of GK Per was observed from 2018 August 23 to October 28 (optical peak on Sept. 24, V= 10.1). Follow-up observations (e.g. spectroscopy) 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 Lasair: - Smith et al., 2019RNAAS...3...26S Zwicky Transient Facility (ZTF): - Masci et al., 2019PASP..131a8003M

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