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

[vsnet-campaign-dn 16837] KZ Gem outburst
by Taichi Kato 11 Jan '23

11 Jan '23

KZ Gem outburst (SS Cyg star?) YYYYMMDD(UT) mag observer 20230102.7140 <160c (Yutaka Maeda) 20230103.7017 <154c (Yutaka Maeda) 20230104.6969 <146c (Yutaka Maeda) 20230107.7661 <142c (Yutaka Maeda) 20230108.7213 146:c (Yutaka Maeda) 20230109.1496 14.40C (Masao Funada) 20230109.7621 146:c (Yutaka Maeda) 20230110.024 14.50C (Gary Poyner) 20230110.0237 14.41C (Masao Funada)

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[vsnet-campaign-dn 16836] SS UMi superoutburst
by Taichi Kato 11 Jan '23

11 Jan '23

SS UMi superoutburst YYYYMMDD(UT) mag observer 20230102.8283 <154c (Yutaka Maeda) 20230103.8162 <152c (Yutaka Maeda) 20230107.8855 136:cG (Yutaka Maeda) 20230108.728 146C (Mitsutaka Hiraga) 20230108.8059 136:c (Yutaka Maeda) 20230108.8059 136:c (Yutaka Maeda) 20230109.267 13.75C (Gary Poyner) 20230109.8620 139c (Yutaka Maeda)

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[vsnet-campaign-dn 16835] EW Hya: possible SU UMa
by Taichi Kato 10 Jan '23

10 Jan '23

EW Hya: possible SU UMa Based on ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021), this object may be an SU UMa star. Precursor? + superoutburst in 2017 Mar. (also detected in ASAS-SN) and likely superoutburst in 2020 Apr.-May.

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[vsnet-campaign-dn 16834] MGAB-V233 superoutburst continues
by Taichi Kato 10 Jan '23

10 Jan '23

MGAB-V233 superoutburst continues (ER UMa star) Observations of superhumps are desired. YYYYMMDD(UT) mag observer 20221220.5642 <146C (Masayuki Moriyama) 20221225.5481 156C (Masayuki Moriyama) 20230102.5135 152C (Masayuki Moriyama) 20230108.4873 15.40C (Masayuki Moriyama)

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[vsnet-campaign-dn 16833] PNVJ06245297+0208207 rapid fading
by Taichi Kato 10 Jan '23

10 Jan '23

PNVJ06245297+0208207 rapid fading According to observations by Josch Hambsch, this object was rapidly fading on Jan. 9. The behavior is typical for an AM CVn-type outburst. Superhumps will soon appear.

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[vsnet-campaign-dn 16832] CS Ind faded
by Taichi Kato 09 Jan '23

09 Jan '23

CS Ind faded Normal outburst or precursor? YYYYMMDD(UT) mag observer 20221231.482 125 (Rod Stubbings) 20230103.085 11.76C (Gary Poyner) 20230103.0866 11.81C (Masao Funada) 20230104.4336 11.899V (Filipp Romanov) 20230104.4345 11.903V (Filipp Romanov) 20230104.4354 11.888V (Filipp Romanov) 20230104.4363 11.901V (Filipp Romanov) 20230104.4372 11.894V (Filipp Romanov) 20230104.4381 11.894V (Filipp Romanov) 20230104.4390 11.897V (Filipp Romanov) 20230104.4399 11.906V (Filipp Romanov) 20230104.4408 11.901V (Filipp Romanov) 20230104.4417 11.911V (Filipp Romanov) 20230104.4426 11.910V (Filipp Romanov) 20230104.4435 11.897V (Filipp Romanov) 20230104.4444 11.906V (Filipp Romanov) 20230104.4453 11.907V (Filipp Romanov) 20230104.4462 11.900V (Filipp Romanov) 20230104.4471 11.902V (Filipp Romanov) 20230104.4480 11.898V (Filipp Romanov) 20230104.4519 11.905V (Filipp Romanov) 20230104.4528 11.909V (Filipp Romanov) 20230104.4537 11.897V (Filipp Romanov) 20230104.4546 11.892V (Filipp Romanov) 20230104.4555 11.904V (Filipp Romanov) 20230104.4564 11.895V (Filipp Romanov) 20230104.4573 11.887V (Filipp Romanov) 20230104.4582 11.888V (Filipp Romanov) 20230104.4591 11.888V (Filipp Romanov) 20230104.4600 11.899V (Filipp Romanov) 20230104.4609 11.897V (Filipp Romanov) 20230104.4618 11.902V (Filipp Romanov) 20230104.4627 11.909V (Filipp Romanov) 20230104.4636 11.898V (Filipp Romanov) 20230104.4645 11.906V (Filipp Romanov) 20230104.4654 11.898V (Filipp Romanov) 20230104.4663 11.898V (Filipp Romanov) 20230104.4672 11.898V (Filipp Romanov) 20230104.4681 11.889V (Filipp Romanov) 20230104.4690 11.878V (Filipp Romanov) 20230104.4699 11.888V (Filipp Romanov) 20230105.478 118 (Rod Stubbings) 20230106.501 118 (Rod Stubbings) 20230107.4329 12.347V (Filipp Romanov) 20230107.4338 12.352V (Filipp Romanov) 20230107.4347 12.344V (Filipp Romanov) 20230107.4356 12.348V (Filipp Romanov) 20230107.4365 12.356V (Filipp Romanov) 20230107.4374 12.344V (Filipp Romanov) 20230107.4383 12.343V (Filipp Romanov) 20230107.4392 12.362V (Filipp Romanov) 20230107.4401 12.340V (Filipp Romanov) 20230107.4410 12.352V (Filipp Romanov) 20230107.4419 12.351V (Filipp Romanov) 20230107.4428 12.340V (Filipp Romanov) 20230107.4437 12.353V (Filipp Romanov) 20230107.4446 12.356V (Filipp Romanov) 20230107.4455 12.352V (Filipp Romanov) 20230107.4464 12.360V (Filipp Romanov) 20230107.4473 12.345V (Filipp Romanov) 20230107.4482 12.362V (Filipp Romanov) 20230107.4521 12.346V (Filipp Romanov) 20230107.4530 12.363V (Filipp Romanov) 20230107.4539 12.364V (Filipp Romanov) 20230107.4548 12.370V (Filipp Romanov) 20230107.4557 12.377V (Filipp Romanov) 20230107.4566 12.363V (Filipp Romanov) 20230107.4575 12.367V (Filipp Romanov) 20230107.4584 12.360V (Filipp Romanov) 20230107.4593 12.354V (Filipp Romanov) 20230107.4602 12.363V (Filipp Romanov) 20230107.4611 12.352V (Filipp Romanov) 20230107.4620 12.360V (Filipp Romanov) 20230107.4629 12.347V (Filipp Romanov) 20230107.4638 12.351V (Filipp Romanov) 20230107.4647 12.338V (Filipp Romanov) 20230107.4656 12.356V (Filipp Romanov) 20230107.4665 12.348V (Filipp Romanov) 20230107.4674 12.355V (Filipp Romanov) 20230107.4683 12.357V (Filipp Romanov) 20230107.4692 12.364V (Filipp Romanov) 20230107.4701 12.378V (Filipp Romanov) 20230107.4710 12.366V (Filipp Romanov) 20230107.481 122 (Rod Stubbings) 20230108.460 130 (Rod Stubbings)

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[vsnet-campaign-dn 16831] GI Mon: currently dwarf nova
by Taichi Kato 08 Jan '23

08 Jan '23

GI Mon: currently dwarf nova Using ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021), I found that this object is currently a dwarf nova with 1 mag amplitude (see also vsnet-chat 8458). The light curve since 2019 resembles an IW And star (heartbeat state). The current cycle length is about 70 d.

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[vsnet-campaign-dn 16830] Z Cam: oscillations before the termination of standstill
by Taichi Kato 08 Jan '23

08 Jan '23

Z Cam: oscillations before the termination of standstill It would be worth noting that there were low-amplitude oscillations since 2022 Oct., but without gradual brightening seen in IW And stars. The disk apparently started becoming thermally unstable before the termination of the standstill. Oscillations were also seen for a month after entering this standstill (2022 Apr.).

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[vsnet-campaign-dn 16829] V1024 Per faded (precursor?)
by Taichi Kato 08 Jan '23

08 Jan '23

V1024 Per faded (precursor?) YYYYMMDD(UT) mag observer 20230102.549 157C (Mitsutaka Hiraga) 20230102.5874 <157c (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)

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[vsnet-campaign-dn 16828] MASTER OT J021216.01+461154.5: no superhumps
by Taichi Kato 08 Jan '23

08 Jan '23

MASTER OT J021216.01+461154.5: no superhumps Tonny Vanmunster and Tamas Tordai reported observations on two nights. No superhumps were detected (at least as of now).

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vsnet-campaign-dn January 2023