June 2022 - vsnet-campaign-dn - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-campaign-dn 16430] ASASSN-22ho: new SU UMa-type dwarf nova
by tonny.vanmunster＠gmail.com 28 Nov '22

28 Nov '22

Dear colleagues, I have just finished analysing my unfiltered CCD observations of ASASSN-22ho, obtained on 2022, June 02/03 at CBA Belgium Observatory, using a 0.40-m f/10.0 telescope and QHY-286M CMOS camera under clear skies. Regular superhumps with an amplitude of 0.35 mag are very clearly visible in the resulting light curve, establishing ASASSN-22ho 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 (long) superhump period of 0.0902 +/- 0.0025d. The object was at mag CV = 16.5 on Jun 03rd. 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 16461] Re: ASASSN-18su
by Taichi Kato 29 Jun '22

29 Jun '22

Re: ASASSN-18su Superhumps were already detected during the 2018 superoutburst by Berto Monard. Superhumps appeared on 2018 Aug. 25. Due to the short visibility, the period was not determined.

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[vsnet-campaign-dn 16459] ASASSN-18su (super?)outburst (since June 24)
by Patrick Schmeer 28 Jun '22

28 Jun '22

ASASSN-18su (UG) https://www.aavso.org/vsx/index.php?view=detail.top&oid=623474 ASASSN-18su was discovered on 2018 August 17. Unfortunately that outburst could be followed for only few days. After the seasonal gap a very long fading tail can be seen in ATLAS forced photometry data. T. Kato wrote (vsnet-alert 22429): "The Gaia proper motion is comparable to that of OV Boo ... ASASSN-18su looks likely a population II CV candidate." The current outburst was detected by Rod Stubbings at mv= 11.3 on 2022 June 28.537 UT (vsnet-outburst 28822, vsnet-alert 26852). It had already started on June 24 and is 1.5 magnitudes fainter than the 2018 outburst according to ASAS-SN Sky Patrol data: https://asas-sn.osu.edu/sky-patrol/coordinate/52d16cd1-3548-431f-a7fc-326e3… Time-resolved photometry is urgently required. 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

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[vsnet-campaign-dn 16458] QZ Vir (= T Leo) superoutburst (since June 21)
by Patrick Schmeer 28 Jun '22

28 Jun '22

QZ Virginis = T Leonis (UGSU) https://www.aavso.org/vsx/index.php?view=detail.top&oid=17034 Outburst first detected on 2022 June 22.981 UT at V= 10.36 by Carlos Colesanti (CCT): https://app.aavso.org/webobs/results/?star=000-BBS-294 Observed on June 28.424 UT at mv= 10.4 by Rod Stubbings (vsnet-outburst 28822). 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/c371f339-8e10-448c-98f5-e234f… The current superoutburst started on 2022 June 20 or 21. A normal outburst was observed from 2022 Jan. 31 to Feb. 3. Clear skies, Patrick

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[vsnet-campaign-dn 16457] TCP J22561804+4109534: new transient (mag. 14) in Lacerta
by Patrick Schmeer 27 Jun '22

27 Jun '22

TCP J22561804+4109534 (UG:) (submitted to VSX) RA 22h56m18.05s +41°09'54.3" (J2000.0, Pan-STARRS1) 2022 June 26.6897 UT, mag. 14.0 (CMOS camera, unfiltered) Discoverer: Yuji Nakamura (Kameyama, Mie, Japan) 2022 06 26.6897 UT Discovered by Yuji Nakamura, Kameyama, Mie, Japan, on two frames (30-s exp. limiting mag 16.0) taken by 10cm/F3.0 refractor and CMOS camera. Nothing is visible at this location on the frames taken on 2022 June 18.7097 UT (30-s exp. limiting mag 16.0) by same instrument. --- Isao Endoh (NAOJ) http://www.cbat.eps.harvard.edu/unconf/followups/J22561804+4109534.html Complete 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/a342649c-16c0-43e6-86f6-933b9… TCPJ22561804+4109534 20220624.4688 <17.55g ASN TCPJ22561804+4109534 20220626.3301 14.70g ASN TCPJ22561804+4109534 20220626.3314 14.76g ASN TCPJ22561804+4109534 20220626.3326 14.74g ASN TCPJ22561804+4109534 20220626.3379 14.71g ASN TCPJ22561804+4109534 20220626.3391 14.72g ASN TCPJ22561804+4109534 20220626.3404 14.69g ASN Time-resolved and multiband (V, B, ...) photometry are required (spectroscopy is also encouraged). Clear skies, Patrick

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[vsnet-campaign-dn 16456] ASASSN-20pv bright again (AM CVn)
by Taichi Kato 22 Jun '22

22 Jun '22

ASASSN-20pv bright again (AM CVn) Brightening after fading following long standstill-like rebrightening. YYYYMMDD(UT) mag observer 20220528.506 148 (Rod Stubbings) 20220603.466 157 (Rod Stubbings) 20220621.426 143 (Rod Stubbings) 20220621.458 145 (Rod Stubbings)

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[vsnet-campaign-dn 16455] Gaia22coq
by Taichi Kato 21 Jun '22

21 Jun '22

Gaia22coq http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia22coq/ Gaia22coq AT2022nbg 2022-06-18 14:45:10 331.72290 38.41940 17.55 unknown 2022-06-20 17:53:28 bright blue transient, rising fast

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[vsnet-campaign-dn 16454] V418 Ser superoutburst continues (EI Psc star)
by Taichi Kato 20 Jun '22

20 Jun '22

V418 Ser superoutburst continues (EI Psc star) YYYYMMDD(UT) mag observer 20220601.5617 <155c (Yutaka Maeda) 20220603.449 150 (Rod Stubbings) 20220603.5563 158:c (Yutaka Maeda) 20220604.8875 154cG (Masao Funada) 20220606.5638 154:cG (Yutaka Maeda) 20220606.5638 154:cG (Yutaka Maeda) 20220608.5416 <152c (Yutaka Maeda) 20220608.5697 15.91C (Masayuki Moriyama) 20220616.1153 15.80C (Masao Funada) 20220617.6423 <148c (Yutaka Maeda)

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[vsnet-campaign-dn 16453] MGAB-V300: rebrightening from a possible AM CVn star
by Taichi Kato 20 Jun '22

20 Jun '22

MGAB-V300: rebrightening from a possible AM CVn star Type from ZTF data. Rapid fading (2 mag/d) and rebrightening in the past data. YYYYMMDD(UT) mag observer 20220612.2432 14.06C (Masao Funada) 20220612.3877 14.328zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220614.3776 17.032zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220614.4204 17.024zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220615.163 <16.70C (Gary Poyner) 20220615.1640 <173C (Masao Funada) 20220617.715 16.45C (Hiroshi Itoh)

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[vsnet-campaign-dn 16452] KLK-43 possible superoutburst
by Taichi Kato 20 Jun '22

20 Jun '22

KLK-43 possible superoutburst Type from ZTF data. YYYYMMDD(UT) mag observer 20220601.3839 16.619zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220601.4591 16.455zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220605.4019 16.620zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220605.4425 16.718zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220607.4141 17.081zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220609.3992 17.148zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220611.4205 17.404zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-campaign-dn 16451] CRTSJ141002.2-124809 possible superoutburst
by Taichi Kato 20 Jun '22

20 Jun '22

CRTSJ141002.2-124809 possible superoutburst Type from ZTF data. YYYYMMDD(UT) mag observer 20220617.1898 16.391zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220617.2962 16.141zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-campaign-dn 16450] AX Cap superoutburst
by Taichi Kato 20 Jun '22

20 Jun '22

AX Cap superoutburst YYYYMMDD(UT) mag observer 20220603.7407 <155c (Yutaka Maeda) 20220607.4190 17.529zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220608.7060 <149c (Yutaka Maeda) 20220609.4020 16.050zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220609.4387 16.169zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220611.3609 16.358zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220611.6920 <151c (Yutaka Maeda) 20220613.3170 16.861zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220613.3723 16.68C (Masao Funada) 20220613.3969 16.818zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-campaign-dn 16449] ASASSN-21mm outburst
by Taichi Kato 20 Jun '22

20 Jun '22

ASASSN-21mm outburst Relatively rare outburst. Subtype unknown. YYYYMMDD(UT) mag observer 20220611.3567 16.214zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220613.3152 16.233zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220613.3769 16.187zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-campaign-dn 16448] ASASSN-20ke likely superoutburst (AM CVn candidate)
by Taichi Kato 20 Jun '22

20 Jun '22

ASASSN-20ke likely superoutburst (AM CVn candidate) Type from ZTF data. Supercycle = 1 yr. YYYYMMDD(UT) mag observer 20220613.3213 16.763zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220613.3950 16.875zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-campaign-dn 16447] ASASSN-20jt likely superoutburst (AM CVn candidate)
by Taichi Kato 20 Jun '22

20 Jun '22

ASASSN-20jt likely superoutburst (AM CVn candidate) Type from ZTF data. Supercycle = 2 yr. YYYYMMDD(UT) mag observer 20220614.4139 16.982zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220614.4523 16.812zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-campaign-dn 16446] ASASSN-18zm likely superoutburst
by Taichi Kato 20 Jun '22

20 Jun '22

ASASSN-18zm likely superoutburst Type from ZTF data. YYYYMMDD(UT) mag observer 20220608.4122 16.924zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220608.4380 16.955zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220609.3755 16.824zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220611.3672 17.205zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220612.4528 17.236zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220613.4323 17.331zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220613.4458 17.416zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220614.4518 17.433zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-campaign-dn 16445] ASASSN-18pp long outburst
by Taichi Kato 20 Jun '22

20 Jun '22

ASASSN-18pp long outburst Possible superoutburst? YYYYMMDD(UT) mag observer 20220610.3979 16.255zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220612.3882 16.485zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220612.4209 16.639zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220614.3771 16.314zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220614.4209 16.427zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-campaign-dn 16444] ASASSN-14cr likely superoutburst
by Taichi Kato 20 Jun '22

20 Jun '22

ASASSN-14cr likely superoutburst YYYYMMDD(UT) mag observer 20220608.7701 <156c (Yutaka Maeda) 20220611.3652 15.550zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220611.4560 15.386zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220611.7559 <155c (Yutaka Maeda)

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[vsnet-campaign-dn 16441] V1028 Cyg outburst
by Taichi Kato 17 Jun '22

17 Jun '22

V1028 Cyg outburst YYYYMMDD(UT) mag observer 20220610.9528 <144 (Eddy Muyllaert) 20220611.7357 <160c (Yutaka Maeda) 20220611.9854 <144 (Eddy Muyllaert) 20220613.9688 <144 (Eddy Muyllaert) 20220614.9681 137 (Eddy Muyllaert) 20220615.117 13.47C (Gary Poyner)

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[vsnet-campaign-dn 16442] MGAB-V349: SU UMa + IW And (currently in outburst)
by Taichi Kato 17 Jun '22

17 Jun '22

MGAB-V349: SU UMa + IW And (currently in outburst) From ZTF data. Superoutburst in 2019 June-July. Suuperhump detection on 2019 July 10. Long, slowly fading outburst in 2021 June (superoutburst?). Standstill-like behavior (IW And) between 2019 Aug. and Nov. Time-resolved photometry during long outbursts are desired (mag 16 at maximum).

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[vsnet-campaign-dn 16443] MN Dra superoutburst
by Taichi Kato 17 Jun '22

17 Jun '22

MN Dra superoutburst YYYYMMDD(UT) mag observer 20220531.7739 <147c (Yutaka Maeda) 20220601.3926 21.613zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220601.4358 19.760zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220601.7914 <159c (Yutaka Maeda) 20220602.4316 18.018zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220602.4463 17.810zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220602.7851 <154c (Yutaka Maeda) 20220603.2590 16.503zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220603.3237 16.577zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220603.7908 <159c (Yutaka Maeda) 20220604.4138 15.840zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220604.4568 15.851zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220605.3874 15.756zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220605.4284 16.062zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220607.2856 16.005zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220607.3018 15.824zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220607.4083 15.993zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220607.4098 15.942zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220608.7532 <149c (Yutaka Maeda) 20220609.3739 16.285zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220609.3912 16.244zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220609.4337 16.098zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220611.3455 16.341zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220611.3697 16.324zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220611.4104 16.316zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220611.4261 16.464zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-campaign-dn 16440] X Ser (Nova 1903) in outburst (since June 9)
by Patrick Schmeer 16 Jun '22

16 Jun '22

X Serpentis (NB+UG) https://www.aavso.org/vsx/index.php?view=detail.top&oid=34598 Recent ASAS-SN Sky Patrol light curve and data: https://asas-sn.osu.edu/sky-patrol/coordinate/6ce91fc2-18e8-4c73-a907-c901f… Zwicky Transient Facility (ZTF) light curve and data: https://lasair.roe.ac.uk/object/ZTF18adbafew/ Robert J. Modic detected the current outburst at V= 15.35 on 2022 June 16.226 UT (see below). The most recently recorded outburst occurred from 2021 July 28 to September 10. 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 ------------ Robert J. Modic wrote on 16 June 2022 at 06:20:30 UTC: CCD Observations Object YYYYMMDD(UT) Mag Obs Chart Remarks SERX 20220616.226 15.35V MRV Henden T21; Err 0.04; Outburst Instruments: Planewave 17" CDK w/FLI PL6303E, iTelescope.Net (T21) Observer: Robert J. Modic (MRV)

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[vsnet-campaign-dn 16439] MGAB-V300 likely superoutburst
by Taichi Kato 14 Jun '22

14 Jun '22

MGAB-V300 likely superoutburst Superhumps have not yet been detected. YYYYMMDD(UT) mag observer 20220421.2778 <184C (Masao Funada) 20220612.2432 14.06C (Masao Funada)

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[vsnet-campaign-dn 16438] SDSS J152419.33+220920.0 outburst
by Taichi Kato 14 Jun '22

14 Jun '22

SDSS J152419.33+220920.0 outburst UGSU+E YYYYMMDD(UT) mag observer 20220531.2786 18.394zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220602.2749 19.395zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220603.5512 <158c (Yutaka Maeda) 20220606.2132 18.414zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220606.5588 <157c (Yutaka Maeda) 20220610.3212 15.400zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220610.3661 15.562zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-campaign-dn 16437] ZTF J193534.18+085856.8 likely superoutburst
by Taichi Kato 14 Jun '22

14 Jun '22

ZTF J193534.18+085856.8 likely superoutburst http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia22cky/ Gaia22cky AT2022mtb 2022-06-08 09:08:12 293.89235 8.98220 18.58 19.59 0.20 unknown 2022-06-13 07:13:14 ~1 mag brightening in Gaia source Likely SU UMa star in ZTF data. Superoutbursts in 2019 June, 2020 Nov. and probably now.

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[vsnet-campaign-dn 16436] CRTS J204618.0-312128 bright outburst
by Taichi Kato 14 Jun '22

14 Jun '22

CRTS J204618.0-312128 bright outburst http://gsaweb.ast.cam.ac.uk/alerts/alert/Gaia22ckz/ Gaia22ckz AT2022mtc 2022-06-07 21:51:21 311.57483 -31.35790 14.47 17.86 1.40 unknown 2022-06-13 07:14:00 ~5 mag outburst in candidate CV SSS110413:204618-312128

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[vsnet-campaign-dn 16435] ASASSN-21fd likely superoutburst
by Taichi Kato 10 Jun '22

10 Jun '22

ASASSN-21fd likely superoutburst Type from ZTF data. YYYYMMDD(UT) mag observer 20220526.4121 16.054zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220528.3994 15.856zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220528.4407 15.756zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220601.3829 16.298zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220601.4241 16.463zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220603.3533 16.714zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220603.4420 16.654zg (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220605.3965 16.891zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220607.3085 16.880zr (Zwicky Transient Facility Lasair (Masci+ 2019)) 20220607.4155 16.770zg (Zwicky Transient Facility Lasair (Masci+ 2019))

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[vsnet-campaign-dn 16434] V418 Ser superoutburst
by Taichi Kato 10 Jun '22

10 Jun '22

V418 Ser superoutburst (EI Psc star) YYYYMMDD(UT) mag observer 20220601.5617 <155c (Yutaka Maeda) 20220603.449 150 (Rod Stubbings) 20220603.5563 158:c (Yutaka Maeda) 20220604.8875 154cG (Masao Funada) 20220606.5638 154:cG (Yutaka Maeda) 20220606.5638 154:cG (Yutaka Maeda) 20220608.5416 <152c (Yutaka Maeda) 20220608.5697 15.91C (Masayuki Moriyama)

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[vsnet-campaign-dn 16182] V485 Cen superoutburst
by Taichi Kato 07 Jun '22

07 Jun '22

V485 Cen superoutburst EI Psc-type object. YYYYMMDD(UT) mag observer 20211218.2709 <168C (Masao Funada) 20211225.3367 14.18C (Masao Funada) 20211227.642 144 (Rod Stubbings) 20211228.658 145 (Rod Stubbings) 20211229.658 145 (Rod Stubbings)

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[vsnet-campaign-dn 16432] ASASSN-19rg outburst (AM CVn)
by Taichi Kato 07 Jun '22

07 Jun '22

ASASSN-19rg outburst (AM CVn) YYYYMMDD(UT) mag observer 20220517.4999 <148c (Yutaka Maeda) 20220518.5029 <153c (Yutaka Maeda) 20220521.4793 <151c (Yutaka Maeda) 20220527.4671 <147c (Yutaka Maeda) 20220602.4703 <148c (Yutaka Maeda) 20220603.4672 137:c (Yutaka Maeda)

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[vsnet-campaign-dn 16431] ASASSN-22hc: new SU UMa-type dwarf nova
by Taichi Kato 07 Jun '22

07 Jun '22

ASASSN-22hc: new SU UMa-type dwarf nova Berto Monard and Josch Hambsch have reported observations. The object started to show superhumps on May 31 and the period is 0.05633(2) d (amplitude 0.22 mag).

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[vsnet-campaign-dn 16428] ASASSN-16eg: outburst or noise?
by Taichi Kato 03 Jun '22

03 Jun '22

ASASSN-16eg: outburst or noise? YYYYMMDD(UT) mag observer 20220521.5911 <163c (Yutaka Maeda) 20220522.6073 <154c (Yutaka Maeda) 20220527.6262 <159c (Yutaka Maeda) 20220601.6274 128c (Yutaka Maeda)

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[vsnet-campaign-dn 16427] ASASSN-22ha: new most likely WZ Sge-type dwarf nova
by Taichi Kato 03 Jun '22

03 Jun '22

ASASSN-22ha: new most likely WZ Sge-type dwarf nova According to observations by Itoh-san on June 2, this object showed 0.15-mag superhumps (period around 0.06 d or slightly shorter). Considering the long-waiting time and large amplitude, this object is most likely a WZ Sge-type dwarf nova.

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vsnet-campaign-dn June 2022