- vsnet-chat - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-chat 9390] ASASSN-15hj: IW And star
by Taichi Kato 04 May '23

04 May '23

ASASSN-15hj: IW And star ATLAS + ASAS-SN ver.2 Typical IW And behavior in 2017. Additional standstills with terminal brightening in recent years.

1 0

[vsnet-chat 9389] ASASSN-18ed identification
by Taichi Kato 04 May '23

04 May '23

ASASSN-18ed identification This one appears to be correct. 130120.4 -413603 (2000.0) Gaia_DR3_6139397368696634240 CV (score=0.43) 130120.482 -413603.70 (2000.0) Gaia_DR2_6139397368696634240 plx=0.874(0.357) dismod=10.3 pmra=-118.292(0.534) pmdec=2.290(0.283) G=17.929 BP=17.231 RP=16.798 130120.477 -413603.70 (2000.0) Gaia_EDR3_6139397368696634240 plx=1.381(0.142) dismod=9.3 pmra=-118.751(0.220) pmdec=1.835(0.103) G=19.019 BP=17.749 RP=17.220

1 0

[vsnet-chat 9388] V1147 Cen: Z Cam star
by Taichi Kato 04 May '23

04 May '23

V1147 Cen: Z Cam star ASAS-SN recorded a standstill in 2022 Mar.-May. The standstill was rising and there was some indication of an IW And-type phenomenon.

1 0

[vsnet-chat 9387] VSOLJ Variable Star Bulletin No.115
by meineko 02 May '23

02 May '23

No.115 2023 Apr. Eclipse observations of V838 Her (Nova Her 1991) during nova eruption Taichi Kato http://vsolj.cetus-net.org/bulletin.html Seiichiro Kiyota VSOLJ

1 0

[vsnet-chat 9386] CRTSJ101545.9+033312 range
by Taichi Kato 02 May '23

02 May '23

CRTSJ101545.9+033312 range https://www.aavso.org/vsx/index.php?view=detail.top&oid=225977 The minimum magnitude was a confusion with a nearby object.

1 0

[vsnet-chat 9385] ASASSN-16gc likely SU UMa star
by Taichi Kato 02 May '23

02 May '23

ASASSN-16gc likely SU UMa star Precursor + superoutburst in 2022 Nov. in ATLAS data. YYYYMMDD(UT) mag observer 20221108.0103 <16.533g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20221109.0190 <16.010g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20221111.0272 18.365o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221111.0344 18.058o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221111.0557 18.078o (ATLAS Forced … [View More]Photometry (Tonry+2018; Shingles+2021)) 20221111.7650 <17.477g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20221111.7740 18.669o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221111.7790 18.399o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221111.7903 18.458o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221113.7571 15.263g (ASAS-SN Sky Patrol Photom. DB (Hart+2023; Shappee+2014)) 20221114.0276 15.445o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221114.0331 15.427o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221114.0362 15.455o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221114.0462 15.463o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221116.7636 17.446c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221116.7672 17.747c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221116.7735 17.590c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221116.7781 17.492c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221116.7881 17.591c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221119.0195 15.250o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221119.0222 15.260o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221119.0272 15.313o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221119.0408 15.264o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221119.7658 15.281c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221119.7699 15.250c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221119.7731 15.219c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221119.7776 15.284c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221119.7785 15.308c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221119.7930 15.186c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221122.0177 15.688o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221122.0191 14.519o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221122.0209 15.597o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221122.0222 15.716o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221122.0272 15.583o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221122.0372 15.596o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221124.7680 15.924c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221124.7712 15.974c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221124.7775 16.029c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20221124.7930 16.058c (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) [View Less]

1 0

[vsnet-chat 9384] ASASSN-16ef: helium dwarf nova
by Taichi Kato 01 May '23

01 May '23

ASASSN-16ef: helium dwarf nova Typical AM CVn-type superoutburst in 2021 July-Sep in ZTF and ASAS-SN data. Short main superoutburst, dip, long rebrightening followed by multiple short rebrightenings.

1 0

[vsnet-chat 9383] SDSS J220818.52+135330.0: dwarf nova
by Taichi Kato 01 May '23

01 May '23

SDSS J220818.52+135330.0: dwarf nova ZTF detected an outburst in 2018 Nov.-Dec. Likely with a rebrightening. The outburst was not as long nor bright as a WZ Sge-type one, and this object is likely an SU UMa star.

1 0

[vsnet-chat 9382] Gaia DR3 797435239135183744 = SDSS J093130.75+335651.2: eclipsing dwarf nova below the period gap
by Taichi Kato 01 May '23

01 May '23

Gaia DR3 797435239135183744 = SDSS J093130.75+335651.2: eclipsing dwarf nova below the period gap From ZTF data. Min(BJD) = 2459110.978 + 0.0799401(2) E Bright outburst (at least reaching r=15.6) was in 2020 Sep. and ZTF snapshot data recorded the fading part. Due to the period close to 2/25 d, only phases around eclipses were incidentally recorded by ZTF (observational intervals 2 d). Depths of eclipse more than 1.5 mag. This epoch and period express the quiescent data well, but … [View More]

1 0

[vsnet-chat 9381] Gaia19bxc: short high state in 2023 Mar.
by Taichi Kato 01 May '23

01 May '23

Gaia19bxc: short high state in 2023 Mar. Possible polar below the period minimum. Again in low state in Apr. according to ATLAS. YYYYMMDD(UT) mag observer 20230219.5062 19.667zr (ZTF Alert DC mag (Masci+ 2019)) 20230313.4894 18.785zg (ZTF Alert DC mag (Masci+ 2019)) 20230318.3677 18.768o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230318.6110 19.062o (ATLAS Forced Photometry (Tonry+2018; Shingles+2021)) 20230322.3471 19.094o (ATLAS Forced Photometry (Tonry+… [View More]

1 0

2025

2024

2023

2022

2021

vsnet-chat