January 2022 - vsnet-newvar - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-newvar 9041] Re: ASASSN-20pv: no major variations yet
by Taichi Kato 05 Feb '22

05 Feb '22

> Observations on Jan 20 showed a transition to the early modulation with > 'growing' superhumps of still small amplitude and a hint of a 0.0095d alt. > 0.019d period around a mean magnitude of 12.49CR. Ordinary superhumps, yes. The amplitudes were too small to be directly visible in Hambsch's data.

2 1

[vsnet-newvar 9040] ASASSN-20pv: no major variations yet
by Taichi Kato 24 Jan '22

24 Jan '22

ASASSN-20pv: no major variations yet Josch Hambsch reported observations on two nights. No major variations were found. The object may be currently in early superhump phase.

1 0

[vsnet-newvar 9039] ASASSN-22as: new SU UMa (or even WZ Sge?) star in the period gap
by Taichi Kato 24 Jan '22

24 Jan '22

ASASSN-22as: new SU UMa (or even WZ Sge?) star in the period gap Tonny Vanmunster and Tamas Tordai have reported observations. I could find a period of 0.09974(9) d (full amplitude of 0.10 mag). The profile resembles that of early superhumps (doubly peaked, sharp minimum) rather than ordinary superhumps. It is also possible that these superhumps are stage A superhumps. If this is indeed a WZ Sge star, it is very unusual. Further observations are needed to follow the development of these superhumps.

1 0

[vsnet-newvar 9038] ASASSN-22aw: most likely SU UMa star
by Taichi Kato 22 Jan '22

22 Jan '22

ASASSN-22aw: most likely SU UMa star Tamas Tordai has reported observations. There was a 0.4 mag hump (likely superhump). More observations are needed to determine the period.

1 0

[vsnet-newvar 9037] MASTER OT J064855.37-055545.7 = ASASSN-21fj
by Taichi Kato 21 Jan '22

21 Jan '22

MASTER OT J064855.37-055545.7 = ASASSN-21fj https://gcn.gsfc.nasa.gov/gcn/gcn3/26470.gcn3

1 0

[vsnet-newvar 9036] ASASSN-22ax
by Taichi Kato 21 Jan '22

21 Jan '22

ASASSN-22ax Bright CV detected early. ASASSN-22ax --- ------- 2:53:21.49 -13:34:9.3 2022-01-20.18 13.44 SDSS DSS VIZIER ------- CV candidate, matches to PS1 g=20.5, g>17.2 on 2022-01-18.27, g=15.9 on 2022-01-19.22, g=13.6 on 2022-01-20.12 ASASSN-22ax 20220118.27 <172g ASN ASASSN-22ax 20220119.22 159g ASN ASASSN-22ax 20220120.12 136g ASN 025321.486 -133408.83 (2000.0) Gaia_DR2_5157734725783900032 plx=-(-) dismod=- pmra=-(-) pmdec=-(-) G=20.639 BP=20.719 RP=20.478 025321.486 -133408.83 (2000.0) Gaia_EDR3_5157734725783900032 plx=-0.681(1.731) dismod=- pmra=-10.028(1.037) pmdec=-18.710(1.362) G=20.572 BP=20.396 RP=20.680 025321.479 -133408.51 (2000.0) GALEX_DR5_2920234851152954444 NUV=20.984(0.066) FUV=21.024(0.092)

1 0

[vsnet-newvar 9035] ASASSN-22au
by Taichi Kato 21 Jan '22

21 Jan '22

ASASSN-22au Large-amplitude outburst. ASASSN-22au --- ------- 7:56:28.53 -79:2:39.7 2022-01-16.36 13.76 SDSS DSS VIZIER ------- CV candidate, no Vizier match, g>17.8 on 2022-01-13.24, g=14.1 on 2022-01-16.30, g=14.3 on 2022-01-17.09, g=14.7 on 2022-01-18.81 ASASSN-22au 20220113.24 <178g ASN ASASSN-22au 20220116.30 141g ASN ASASSN-22au 20220117.09 143g ASN ASASSN-22au 20220118.81 147g ASN

1 0

[vsnet-newvar 9034] ASASSN-20pv outburst (since Jan. 20)
by Patrick Schmeer 21 Jan '22

21 Jan '22

ASASSN-20pv (UGSU, AM CVn star?) https://www.aavso.org/vsx/index.php?view=detail.top&oid=2214355 Recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) light curve and data: https://asas-sn.osu.edu/sky-patrol/coordinate/c52dbc25-5e71-4947-a906-97fae… ASASSN-20pv 20220119.2103 <16.15g ASN ASASSN-20pv 20220120.1483 12.29g ASN ASASSN-20pv 20220120.1495 12.34g ASN Time-resolved photometry is encouraged. Clear skies, Patrick ---------- Rod Stubbings wrote on Thursday, 20 January 2022 at 14:25:07 UTC: ASASSN-20pv (UGSU/IBWD:) is in outburst ASASSN-20pv 220120.535 123 -- Rod Stubbings Tetoora Road Observatory Victoria, Australia Telescope: "Infinity" 22" f/3.8 stubbo(a)dcsi.net.au http://rodstubbingsobservatory.wordpress.com/

1 0

[vsnet-newvar 9033] ASASSN-15cg: (likely) superoutburst in 2021 Oct.-Nov.
by Patrick Schmeer 17 Jan '22

17 Jan '22

ASASSN-15cg (UGSU:) https://www.aavso.org/vsx/index.php?view=detail.top&oid=400079 Recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) light curve and data: https://asas-sn.osu.edu/sky-patrol/coordinate/61eb8548-4003-48a0-af94-a9a35… Precursor outburst on 2021 October 22-23, followed by a (probable) superoutburst from October 28 to November 6 (which lasted only 9 days). Regards, Patrick ----------- Taichi Kato wrote (vsnet-chat 8336, 21 May 2019 at 05:10:54 UTC): ASASSN-15cg: SU UMa star Precursor + superoutburst in 2019 Mar. Superhump observations during the next superoutburst are required. ASAS-SN data: https://asas-sn.osu.edu/light_curves/cd3775fb-0434-43ef-a600-aaf8b029d90c

1 0

[vsnet-newvar 9032] ASASSN-22as
by Taichi Kato 15 Jan '22

15 Jan '22

ASASSN-22as ASASSN-22as --- ------- 15:17:56.64 45:38:33.1 2022-01-13.62 14.52 SDSS DSS VIZIER ------- CV candidate, matches to PS1 g=22.1, g>18.6 on 2022-01-07.59, g=14.1 on 2022-01-10.62, g=14.8 on 2022-01-13.62 ASASSN-22as 20220107.59 <186g ASN ASASSN-22as 20220110.62 141g ASN ASASSN-22as 20220113.62 148g ASN 151756.233 +453832.77 (2000.0) GALEX_DR5_6374962000150138599 NUV=22.280(0.412) FUV=-(-)

1 0

2024

2023

2022

2021

vsnet-newvar January 2022