February 2023 - vsnet-campaign-dn - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-campaign-dn 16938] PNV J06245297+0208207 fading rapidly
by Taichi Kato 12 Feb '23

12 Feb '23

PNV J06245297+0208207 fading rapidly Rapidly fading after a maximum on Feb. 10. Observers: Tamas Tordai, Crimean Astrophys. Obs. team, Josch Hambsch, Filipp Romanov

1 0

[vsnet-campaign-dn 16937] ASASSN-23af rebrightening
by Taichi Kato 12 Feb '23

12 Feb '23

ASASSN-23af rebrightening Josch Hambsch has reported that this object brightened on Feb. 11 and is at 15.5. This behavior suggests a long rebrightening of a WZ Sge star.

1 0

[vsnet-campaign-dn 16936] Unusual outburst (faint super?) of V1024 Per
by Taichi Kato 12 Feb '23

12 Feb '23

Unusual outburst (faint super?) of V1024 Per Following bright normal outburst (precursor or failed superoutburst), V1024 Per is now in outburst. Superoutburst should be now. Faint superoutburst or outburst still in development? YYYYMMDD(UT) mag observer 20221229.8736 <141 (Eddy Muyllaert) 20221231.6982 <142cG (Yutaka Maeda) 20230102.549 157C (Mitsutaka Hiraga) 20230102.5874 <157c (Yutaka Maeda) 20230102.6585 <141cG (Yutaka Maeda) 20230102.821 <147 (Gary Poyner) 20230102.8542 <141 (Eddy Muyllaert) 20230103.544 164C (Mitsutaka Hiraga) 20230103.5769 153:c (Yutaka Maeda) 20230104.5719 117cG (Yutaka Maeda) 20230104.6940 125C (Masayuki Moriyama) 20230104.867 121 (Gary Poyner) 20230105.937 13.01C (Gary Poyner) 20230106.853 13.69C (Gary Poyner) 20230106.8542 13.67C (Eddy Muyllaert) 20230107.6381 142c (Yutaka Maeda) 20230107.6381 142c (Yutaka Maeda) 20230107.901 14.58C (Gary Poyner) 20230108.5736 150:c (Yutaka Maeda) 20230108.5736 150:c (Yutaka Maeda) 20230108.592 151C (Mitsutaka Hiraga) 20230108.6374 150C (Masayuki Moriyama) 20230108.875 14.95C (Gary Poyner) 20230109.5945 <147c (Yutaka Maeda) 20230109.885 15.29C (Gary Poyner) 20230110.033 <147 (Gary Poyner) 20230110.565 159C (Mitsutaka Hiraga) 20230112.9382 <141 (Eddy Muyllaert) 20230113.012 <147 (Gary Poyner) 20230113.2401 15.611o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230113.2419 15.551o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230113.2451 15.577o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230113.2578 15.407o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230114.3033 15.843o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230114.3065 15.871o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230114.3120 15.672o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230114.3334 15.895o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230114.844 <147 (Gary Poyner) 20230115.3039 15.814o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.3070 15.952o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.3129 15.838o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.3229 15.838o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.9028 <141 (Eddy Muyllaert) 20230117.007 <155 (Gary Poyner) 20230117.817 <147 (Gary Poyner) 20230117.9271 <141 (Eddy Muyllaert) 20230119.3761 15.654o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230119.3793 15.679o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230119.3870 15.569o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230119.4029 15.626o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230119.817 <147 (Gary Poyner) 20230119.9243 <141 (Eddy Muyllaert) 20230120.858 <147 (Gary Poyner) 20230120.9653 <141 (Eddy Muyllaert) 20230121.5508 156:c (Yutaka Maeda) 20230121.6703 156C (Masayuki Moriyama) 20230121.8174 <141 (Eddy Muyllaert) 20230121.872 <155 (Gary Poyner) 20230123.2886 15.610o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230123.2918 15.705o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230123.2977 15.527o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230123.3078 15.662o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230130.530 164C (Mitsutaka Hiraga) 20230130.5697 <157c (Yutaka Maeda) 20230130.9389 <141 (Eddy Muyllaert) 20230204.980 <147 (Gary Poyner) 20230205.5155 <158c (Yutaka Maeda) 20230206.8153 <141 (Eddy Muyllaert) 20230207.8132 <141 (Eddy Muyllaert) 20230207.862 <147 (Gary Poyner) 20230208.8125 <141 (Eddy Muyllaert) 20230209.8771 132 (Eddy Muyllaert) 20230209.985 131 (Gary Poyner) 20230210.5697 132cG (Yutaka Maeda) 20230210.5697 132cG (Yutaka Maeda)

1 0

[vsnet-campaign-dn 16935] Re: SX LMi likely superoutburst
by Taichi Kato 12 Feb '23

12 Feb '23

Re: SX LMi likely superoutburst The outburst is still young. Let's make time-resolved photometry. YYYYMMDD(UT) mag observer 20230207.7009 <140c (Yutaka Maeda) 20230208.8576 <142 (Eddy Muyllaert) 20230210.2668 14.165o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230210.2699 14.190o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230210.2805 13.940o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230210.7517 133cG (Yutaka Maeda)

1 0

[vsnet-campaign-dn 16934] Re: CRTS J103317.3+072119 bright outburst
by Taichi Kato 11 Feb '23

11 Feb '23

Re: CRTS J103317.3+072119 bright outburst Last superoutburst in 2021 June. YYYYMMDD(UT) mag observer 20230130.6625 <157c (Yutaka Maeda) 20230204.6566 <152c (Yutaka Maeda) 20230210.0554 14.348o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230210.0815 14.281o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230210.1102 14.249o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230210.2708 14.379o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230210.2745 14.425o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230210.2809 14.459o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230210.2927 14.362o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230210.7456 139cG (Yutaka Maeda) 20230211.2581 14.272o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230211.2617 14.252o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230211.2676 14.287o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

1 0

[vsnet-campaign-dn 16933] CRTS J103317.3+072119 bright outburst
by Taichi Kato 11 Feb '23

11 Feb '23

CRTS J103317.3+072119 bright outburst Known SU UMa star, but single-night observation was available in the past. YYYYMMDD(UT) mag observer 20230120.6737 <157c (Yutaka Maeda) 20230121.6604 <157c (Yutaka Maeda) 20230130.6625 <157c (Yutaka Maeda) 20230204.6566 <152c (Yutaka Maeda) 20230210.7456 139cG (Yutaka Maeda)

1 0

[vsnet-campaign-dn 16932] MASTER OT J030205.67+254834.3 outburst
by Taichi Kato 11 Feb '23

11 Feb '23

MASTER OT J030205.67+254834.3 outburst Known SU UMa star. Previous superoutburst was in 2016. YYYYMMDD(UT) mag observer 20230130.5481 <152c (Yutaka Maeda) 20230202.5485 <155c (Yutaka Maeda) 20230204.5238 <155c (Yutaka Maeda) 20230205.4938 <157c (Yutaka Maeda) 20230207.5061 <158c (Yutaka Maeda) 20230208.5243 <141c (Yutaka Maeda) 20230210.5481 156:c (Yutaka Maeda) 20230210.5481 156:c (Yutaka Maeda)

1 0

[vsnet-campaign-dn 16931] SX LMi likely superoutburst
by Taichi Kato 11 Feb '23

11 Feb '23

SX LMi likely superoutburst (The 2022 superoutburst was well observed, but still worth observing particularly in the early phase) YYYYMMDD(UT) mag observer 20230204.6630 <146c (Yutaka Maeda) 20230207.7009 <140c (Yutaka Maeda) 20230208.8576 <142 (Eddy Muyllaert) 20230210.7517 133cG (Yutaka Maeda)

1 0

[vsnet-campaign-dn 16930] ASASSN-15cm: SU UMa star with Porb=0.2085 d
by Taichi Kato 11 Feb '23

11 Feb '23

ASASSN-15cm: SU UMa star with Porb=0.2085 d Using ZTF (Masci et al., 2019) and ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021) data, I found that this object showed a superoutburst in 2019 Aug. Like BO Cet with the same set of data (arXiv:2302.02593 = VSOLJ Variable Star Bulletin No. 106), I obtained a period of 0.2196(1) d, 5.3% longer than the orbital period. This corresponds to q about 0.22 (arXiv:2201.02945 = VSOLJ Variable Star Bulletin No. 89). The core of the secondary of this object appears to be evolved (Thorstensen et al. 2016 AJ 152, 226) and this probably enabled a relatively small q. Another apparent superoutburst was also recorded in 2022 Jan. and future direct detection of superhumps are wanted.

1 0

[vsnet-campaign-dn 16929] Re: ASASSN-15cc bright outburst continues
by Taichi Kato 11 Feb '23

11 Feb '23

Re: ASASSN-15cc bright outburst continues > Time-resolved photometry is encouraged. Itoh-san just reported observations on two nights. No superhumps were present. SS Cyg star or superhumps may appear?

1 0