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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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[vsnet-chat 9280] ASAS-SN light curve of V374 Ori
by Taichi Kato 06 Jan '23

06 Jan '23

ASAS-SN light curve of V374 Ori See https://www.aavso.org/vsx/index.php?view=detail.top&oid=23437 https://www.aavso.org/orion-sword-variables-spectral-types I'm not aware of a CV with M1 secondary and (claimed) WD visible. Too faint in SDSS u and it does not look like that the continuum is from a WD. https://asas-sn.osu.edu/sky-patrol/coordinate/bed7352f-7f44-42cd-a242-99b32…

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[vsnet-chat 9286] V453 Lyr: most likely SU UMa star
by Taichi Kato 04 Jan '23

04 Jan '23

V453 Lyr: most likely SU UMa star Using ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021), I found that this object showed a rebrightening after the 2021 outburst. This object is worth visiting for the next outburst.

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[vsnet-chat 9285] V1114 Cyg position and type
by Taichi Kato 04 Jan '23

04 Jan '23

V1114 Cyg position and type According to M. Hiraga-san (2020 July), the outbursting object was identified with 192436.705 +282602.72 (2000.0) Gaia_DR2_2026051423495985024 plx=0.537(0.377) dismod=11.3 pmra=-6.229(0.916) pmdec=-3.546(0.735) G=19.341 BP=19.568 RP=18.371 192436.704 +282602.72 (2000.0) Gaia_EDR3_2026051423495985024 plx=0.910(0.114) dismod=10.2 pmra=-4.515(0.094) pmdec=-2.729(0.126) G=19.220 BP=19.785 RP=18.349 ATLAS data appear to suppprt the SS Cyg-type classification.

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[vsnet-chat 9284] VSOLJ Variable Star Bulletin No.104
by meineko 03 Jan '23

03 Jan '23

VSOLJ Variable Star Bulletin no.104 is now available at http://vsolj.cetus-net.org/bulletin.html No.104 2023 Jan. Very low state in PY Per in 2022 Taichi Kato Seiichiro Kiyota VSOLJ

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[vsnet-chat 9283] V598 Sco: Z Cam star
by Taichi Kato 03 Jan '23

03 Jan '23

V598 Sco: Z Cam star Using ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021), I found that this object is a Z Cam star. Standstill in 2022 Apr.-May (rising like IW And, but the termination was not recorded).

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[vsnet-chat 9282] AS Pav: most likely SU UMa star
by Taichi Kato 03 Jan '23

03 Jan '23

AS Pav: most likely SU UMa star Using ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021), I found that this object is most likely an SU UMa star. Unmistakable superoutburst occurred in 2022 June-July. This outburst was also detected by Rod Stubbings. Let's try next time.

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[vsnet-chat 9281] V975 Oph: likely bright SU UMa star
by Taichi Kato 03 Jan '23

03 Jan '23

V975 Oph: likely bright SU UMa star Using ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021), I found that this object is most likely an SU UMa star. The most recent superoutburst occurred in 2022 Sep. (14.4 mag). Superhumps were likely present in the spread of ATLAS measurements. The supercycle was likely around 270 d (measurement hindered by solar conjunctions).

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