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

[vsnet-campaign-dn 16242] WY Tri superhumps
by Taichi Kato 13 Feb '22

13 Feb '22

WY Tri superhumps Itoh-san detected superhumps on Feb. 11.

1 0

[vsnet-campaign-dn 16241] Re: TCP J14420760-1758238
by Taichi Kato 12 Feb '22

12 Feb '22

Re: TCP J14420760-1758238 Superoutburst reaching V=12.0 in 2001 in ASAS-3.

1 0

[vsnet-campaign-dn 16240] ASASSN-20pv: long rebrightening
by Taichi Kato 10 Feb '22

10 Feb '22

ASASSN-20pv: long rebrightening The object (AM CVn) is now entering a long (standstill-like) rebrightening as in the 2020-2021 superoutburst. The CCD observers are Berto Monard and Josch Hambsch.

1 0

[vsnet-campaign-dn 16239] NSV 5031: updated period of superhumps
by Taichi Kato 10 Feb '22

10 Feb '22

NSV 5031: updated period of superhumps Based on the data by Berto Monard, Itoh-san and Josch Hambsch, the period of superhumps has been updated to 0.07505(1) d. Very clear superhumps.

1 0

[vsnet-campaign-dn 16238] ASASSN-22bs: possible early superhumps
by Taichi Kato 10 Feb '22

10 Feb '22

ASASSN-22bs: possible early superhumps The most recent data by Stephen Brincat and Josch Hambsch seem to show possible early superhumps, but the amplitude appears to be small. The signal was not very apparent in Monard's data. The large-amplitude variations (0.05 mag) recorded by T. Vanmunster on Feb. 8 were not periodic.

1 0

[vsnet-campaign-dn 16237] Re: WY Tri possible superoutburst (since Feb. 7)
by Taichi Kato 10 Feb '22

10 Feb '22

Re: WY Tri possible superoutburst (since Feb. 7) This object is somewhat strange in that it never reached 13.8 mag as suggested by the discovery observation. 022500.475 +325955.55 (2000.0) Gaia_DR2_325028217130868480 plx=2.039(0.134) dismod=8.5 pmra=-7.760(0.281) pmdec=-17.451(0.205) G=17.633 BP=17.792 RP=17.181 022500.475 +325955.55 (2000.0) Gaia_EDR3_325028217130868480 plx=1.972(0.106) dismod=8.5 pmra=-8.005(0.107) pmdec=-17.648(0.106) G=17.522 BP=17.722 RP=17.085 With the distance modulus of 8.5, the peak apparent magnitude should be around 13. Known superoutbursts look too faint for a non-eclipsing system.

1 0

[vsnet-campaign-dn 16236] NSV 5031: superhump period
by Taichi Kato 10 Feb '22

10 Feb '22

NSV 5031: superhump period Berto Monard and Itoh-san have reported observations. The superhump period is 0.07510(2) d.

1 0

[vsnet-campaign-dn 16235] WY Tri possible superoutburst (since Feb. 7)
by Patrick Schmeer 09 Feb '22

09 Feb '22

WY Trianguli (UGSU) https://www.aavso.org/vsx/index.php?view=detail.top&oid=36640 Y. Maeda wrote (vsnet-outburst 28323): TRIWY 20220208.4726968 150:c Mdy.VSOLJ outburst Complete ASAS-SN Sky Patrol light curve and data: https://asas-sn.osu.edu/sky-patrol/coordinate/2e05b260-9fa5-4782-8032-19791… ZTF light curve, data, and images (via Lasair): https://lasair.roe.ac.uk/object/ZTF18abtgioa/ The current outburst started on 2022 February 7, and WY Tri was still at (orange) mag. 15.1 on Feb. 9.29 UT according to ATLAS forced photometry data. Time-resolved photometry is encouraged. Clear skies, Patrick ------- References: All-Sky Automated Survey for Supernovae (ASAS-SN) Sky Patrol: - Shappee et al., 2014ApJ...788...48S - Kochanek et al., 2017PASP..129j4502K Asteroid Terrestrial-impact Last Alert System (ATLAS): - Tonry et al., 2018PASP..130f4505T Lasair: - Smith et al., 2019RNAAS...3...26S Zwicky Transient Facility (ZTF): - Masci et al., 2019PASP..131a8003M

1 0

[vsnet-campaign-dn 16234] DV TrA: new IW And star currently in standstill
by Taichi Kato 09 Feb '22

09 Feb '22

DV TrA: new IW And star currently in standstill As pointed by R. Stubbings (vsnet-outburst 28315), this object is currently in standstill. ASAS-SN data https://asas-sn.osu.edu/sky-patrol/coordinate/83d88502-9012-4cb2-bf79-f9ffb… show that this object is an IW And star (2021 Jan.-Mar. behavior). The current standstill is rising in brightness and an IW And-type outburst is expected.

1 0

[vsnet-campaign-dn 16233] ASASSN-20pv: clear superhumps
by Taichi Kato 09 Feb '22

09 Feb '22

ASASSN-20pv: clear superhumps Berto Monard has reported further observations including the rebrightening phase. The analysis of the entire data yielded a period of 0.019106(1) d. The mean amplitude is 0.06 mag.

1 0