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[vsnet-chat 9330] CRTSJ085024.2-235811: neglected AM CVn, on the fading tail of the 2022 superoutburst
by Taichi Kato 02 Mar '23

02 Mar '23

CRTSJ085024.2-235811: neglected AM CVn, on the fading tail of the 2022 superoutburst Numerous rebrightenings and long fading tail. Supercycle about 1 yr and observations during the next superoutburst is wanted. Currently mag 19. YYYYMMDD(UT) mag observer 20221017.3308 15.293o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221017.3331 15.286o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221017.3383 15.222o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221017.3456 15.238o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-chat 9329] CRTSJ210356.7-214727: overlooked superoutburst in 2022 Dec.
by Taichi Kato 02 Mar '23

02 Mar '23

CRTSJ210356.7-214727: overlooked superoutburst in 2022 Dec. The object reached 14.3 (2020 Nov.) and regular monitoring is recommended. YYYYMMDD(UT) mag observer 20221119.8114 19.368c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221127.7782 15.772c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221127.7824 15.758c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221127.7879 15.763c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221127.7994 15.724c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221130.0242 15.365o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221130.0273 15.366o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221130.0346 15.343o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221130.0450 15.354o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221202.8016 17.456o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221202.8067 17.441o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221202.8099 17.342o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221202.8200 17.329o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221208.0291 15.113o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221208.0296 15.073o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221208.0332 15.041o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221208.0337 15.057o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221208.0400 15.055o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221208.0409 15.015o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221208.0527 15.078o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221213.0342 15.665o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221213.0346 15.390o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221213.0392 15.408o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221213.0396 15.437o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221213.0501 15.430o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221213.0570 15.397o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221213.7809 15.546o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221213.7841 15.483o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221213.7941 15.455o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-chat 9328] CRTSJ173801.9+354549: most likely AM CVn
by Taichi Kato 01 Mar '23

01 Mar '23

CRTSJ173801.9+354549: most likely AM CVn Using ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021). Short superoutburst + multiple rebrightenings + fading tail. Supercycle about 250 d.

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[vsnet-chat 9327] EC12062-3024: IW And
by Taichi Kato 01 Mar '23

01 Mar '23

EC12062-3024: IW And Using ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021). IW And-type standstill in 2015-2017, ending in 2017 May by brightening. Subtle signs in the recent data, too.

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[vsnet-chat 9326] GDS J1145134-620057: IW And
by Taichi Kato 25 Feb '23

25 Feb '23

GDS J1145134-620057: IW And ATLAS: 15.8-18.2. IW And behavior in early 2023. Some hint in 2022.

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[vsnet-chat 9325] GDS J1308184-633131: IW And
by Taichi Kato 25 Feb '23

25 Feb '23

GDS J1308184-633131: IW And ATLAS: 15.6-18.6. Long standstill + at least one terminal brightening.

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[vsnet-chat 9324] GDS J1010438-582025: active dwarf nova
by Taichi Kato 25 Feb '23

25 Feb '23

GDS J1010438-582025: active dwarf nova ATLAS: 14.8-18.4. Frequent outbursts. SS Cyg? (Some outbursts resembles superoutbursts, but look like long outbursts of an SS Cyg star)

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[vsnet-chat 9323] GDSJ0703457-063947: IW And star
by Taichi Kato 25 Feb '23

25 Feb '23

GDSJ0703457-063947: IW And star Using ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021), this object turned out to be an IW And star (typical behavior in 2022). The variation was more heartbeat-like in 2020-2021, when the object was slightly brighter. This may be a suggestion of various IW And-type behavior depending on the mass-transfer rate.

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[vsnet-chat 9322] MV Leo: unusual start of standstill
by Taichi Kato 24 Feb '23

24 Feb '23

MV Leo: unusual start of standstill Using ATLAS and ZTF data, I found that this object entered a standstill almost directly from a low state in 2020 Mar.-Apr. Such behavior is unexpected. This standstill ended with an outburst like an IW And star.

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[vsnet-chat 9321] 6dFg0002074-374917: deeply eclpsing likely SU UMa star
by Taichi Kato 24 Feb '23

24 Feb '23

6dFg0002074-374917: deeply eclpsing likely SU UMa star Using ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021). Porb=0.0711838(1) d. 1.5-mag deep eclipses and orbital humps in quiescence. Likely superoutburst in 2020.

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