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[vsnet-chat 9297] DQ Mus: SS Cyg star
by Taichi Kato 13 Jan '23

13 Jan '23

DQ Mus: SS Cyg star Using ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021), I found that this object is a frequently outbursting SS Cyg star (cycle length 15-20 d, currently in outburst). 2MASS 120022.062 -682935.97 (2000.0) 15.874 15.307 14.872 (in outburst) 120022.049 -682935.94 (2000.0) Gaia_DR2_5859470401309276544 plx=0.604(0.063) dismod=11.1 pmra=-5.704(0.116) pmdec=-0.383(0.118) G=17.740 BP=18.118 RP=17.004 120022.049 -682935.94 (2000.0) Gaia_EDR3_5859470401309276544 plx=0.759(0.049) dismod=10.6 pmra=-5.567(0.046) pmdec=-0.295(0.058) G=17.576 BP=18.087 RP=16.948

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[vsnet-chat 9296] NSV13146: IW And star
by Taichi Kato 11 Jan '23

11 Jan '23

NSV13146: IW And star Using ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021), I found that this object all variety of different states of an IW And star.

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[vsnet-chat 9295] LP Vul: IW And star
by Taichi Kato 11 Jan '23

11 Jan '23

LP Vul: IW And star Using ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021), I found that this object typical IW And behavior in 2022 June-Sep.

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[vsnet-chat 9294] 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-chat 9293] ASAS-SN light curve of CN Cha
by Taichi Kato 10 Jan '23

10 Jan '23

ASAS-SN light curve of CN Cha M+NC: https://asas-sn.osu.edu/sky-patrol/coordinate/e5bd43f3-0b40-4bd3-b720-49261… see https://ui.adsabs.harvard.edu/abs/2020AJ....160..125L/abstract

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[vsnet-chat 9292] VSOLJ Variable Star Bulletin no.105
by meineko 09 Jan '23

09 Jan '23

VSOLJ Variable Star Bulletin no.105 is now available at http://vsolj.cetus-net.org/bulletin.html No.104 2023 Jan. LS And: WZ Sge-type outburst first time since the 1971 discovery Taichi Kato Seiichiro Kiyota VSOLJ

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[vsnet-chat 9291] V890 Cen: dwarf nova
by Taichi Kato 08 Jan '23

08 Jan '23

V890 Cen: dwarf nova ATLAS data. Non-detection on the previous night. YYYYMMDD(UT) mag observer 20220327.9635 16.518c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220327.9648 16.467c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220327.9676 16.455c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220327.9933 16.426c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220330.2146 16.562o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220330.2180 16.529o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220330.2207 16.528o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220330.2273 16.464o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220403.2516 16.409o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220403.2548 16.458o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220403.2622 16.513o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220403.2973 16.621o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220407.1352 17.487o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220407.1668 17.344o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220407.1709 17.281o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220407.1873 17.324o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220407.2619 17.207o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220407.2972 17.214o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220407.3256 17.440o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220407.3506 17.416o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-chat 9290] V827 Cep: likely SU UMa with a fainter counterpart
by Taichi Kato 07 Jan '23

07 Jan '23

V827 Cep: likely SU UMa with a fainter counterpart I found a likely superoutburst in the ATLAS data. The amplitude looks too small and the true counterpart is likely a fainter one near the USNO object. 20180611.5803 19.220c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180613.5623 18.838o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180613.5716 18.555o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180613.5819 18.780o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180613.5928 18.679o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180615.5517 16.381c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180615.5615 16.407c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180615.5715 16.408c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180615.5821 16.381c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180617.5371 16.434o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180617.5477 16.470o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180617.5589 16.442o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180617.5701 16.476o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180619.5601 16.599o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180619.5698 16.468o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180621.5233 16.791o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180621.5348 16.727o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180621.5454 16.600o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180621.5572 16.681o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180623.5324 16.919o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180623.5422 16.889o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180623.5527 16.983o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180623.5637 16.939o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180625.5490 17.118o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180625.5600 17.011o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180625.5703 17.020o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180625.5809 17.133o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180627.2902 17.282o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180627.5884 17.325o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180627.5994 17.425o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180627.6110 17.284o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180627.6224 17.561o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180629.4774 18.266o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180629.4880 18.518o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180701.5259 18.639o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180701.5291 18.814o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180701.5380 18.757o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20180701.5473 18.675o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-chat 9289] DI Phe: dwarf nova (most likely SU UMa)
by Taichi Kato 07 Jan '23

07 Jan '23

DI Phe: dwarf nova (most likely SU UMa) ATLAS detected several outbursts. This one is most likely a superoutburst. YYYYMMDD(UT) mag observer 20220706.0753 19.437o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220706.0781 19.565o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220706.0832 19.244o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220714.0196 16.337o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220714.0207 16.439o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220714.0225 16.616o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220717.9998 16.785o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220718.0095 16.760o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220718.0128 16.800o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220718.0381 16.716o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220720.3231 17.241o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220720.3396 17.031o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220720.3427 17.061o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220720.3454 17.148o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220722.0533 19.138o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220722.0567 18.863o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220722.0595 19.187o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220724.3076 19.152o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220724.3255 19.453o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20220724.3291 18.995o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-chat 9288] Re: ASAS-SN light curve of V374 Ori
by Taichi Kato 07 Jan '23

07 Jan '23

> Indeed, Brian further checked and sent this note: I see that a batch of LAMOST CV: you recently registered to VSX were (probably) mostly junks. Most of a few real CVs among them had already been discovered by other surveys. For LAMOST CV: with flat light curves (usually bright ones with no other hint of CV activity), I created a category em (instead of only giving CST) representing emission-line objects.

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