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

[vsnet-newvar 9049] 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.

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[vsnet-newvar 9048] 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.

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[vsnet-newvar 9046] ASASSN-22bs: likely dwarf nova outburst (mag. 12.2, in Canis Major)
by Patrick Schmeer 08 Feb '22

08 Feb '22

ASASSN-22bs (UG:) https://www.aavso.org/vsx/index.php?view=detail.top&oid=2226032 Complete 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/2f8a4b69-9191-4256-a3ef-a8e9b… ASASSN-22bs 20220205.8444 <16.91g ASN ASASSN-22bs 20220208.2927 12.15g ASN Transient Name Server (TNS): https://www.wis-tns.org/object/2022bqs Outburst amplitude of more than 8.0 magnitudes. Time-resolved photometry is urgently required. Spectroscopy is also encouraged. Clear skies, Patrick

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[vsnet-newvar 9045] ASASSN-14fe superoutburst
by Taichi Kato 08 Feb '22

08 Feb '22

ASASSN-14fe superoutburst (Superhumps have not yet been detected) YYYYMMDD(UT) mag observer 20220130.485 140 (Rod Stubbings) 20220131.546 140 (Rod Stubbings) 20220202.1637 14.03C (Masao Funada) 20220202.544 145 (Rod Stubbings) 20220203.478 144 (Rod Stubbings) 20220204.544 143 (Rod Stubbings) 20220205.542 145 (Rod Stubbings) 20220206.544 147 (Rod Stubbings)

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[vsnet-newvar 9044] ASASSN-20pv third rebrightening
by Taichi Kato 07 Feb '22

07 Feb '22

ASASSN-20pv third rebrightening YYYYMMDD(UT) mag observer 20220119.2103 <16.15g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220120.1483 12.29g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220120.1495 12.34g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20220120.535 123 (Rod Stubbings) 20220121.494 124 (Rod Stubbings) 20220122.533 125 (Rod Stubbings) 20220124.492 128 (Rod Stubbings) 20220125.524 131 (Rod Stubbings) 20220126.2222 13.52C (Eddy Muyllaert) 20220126.2225 13.61C (Masao Funada) 20220127.2257 13.41C (Eddy Muyllaert) 20220127.2267 13.52C (Masao Funada) 20220128.2638 13.88C (Masao Funada) 20220128.2639 13.78C (Eddy Muyllaert) 20220129.3576 13.83C (Eddy Muyllaert) 20220129.3580 13.42C (Masao Funada) 20220130.535 154 (Rod Stubbings) 20220131.533 156 (Rod Stubbings) (0201 first) 20220203.496 154 (Rod Stubbings) 20220204.519 144 (Rod Stubbings) second 20220205.510 156 (Rod Stubbings) 20220206.498 143 (Rod Stubbings) third 20220206.542 145 (Rod Stubbings) 20220206.556 147 (Rod Stubbings) 20220206.571 148 (Rod Stubbings) 20220206.594 148 (Rod Stubbings) 20220206.697 154 (Rod Stubbings)

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[vsnet-newvar 9041] Re: ASASSN-20pv: no major variations yet
by Taichi Kato 04 Feb '22

04 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.

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[vsnet-newvar 9042] TCP J07094936+1412280 superoutburst (since Dec. 28): rapid fading has started
by Patrick Schmeer 01 Feb '22

01 Feb '22

TCP J07094936+1412280 (UGWZ) https://www.aavso.org/vsx/index.php?view=detail.top&oid=2225804 Today (1 February) a rapid fading started according to recent ASAS-SN Sky Patrol (Shappee et al. 2014ApJ...788...48S and Kochanek et al. 2017PASP..129j4502K) data: https://asas-sn.osu.edu/sky-patrol/coordinate/ba9af573-ae47-4d79-a64b-61d98… Follow-up observations are encouraged. Clear skies, Patrick ------------- Y. Tampo wrote on Saturday, 15 January 2022 at 18:21:18 UTC: TCP J07094936+1412280: appearance of ordinary superhumps Kiyota-san, Itoh-san, Tonny Vanmunster, Stephen M. Brincat, Sano-san, Tamás Tordai, and Kyoto Univ. Obs. have reported further observations of TCP J07094936+1412280. The data on 15th Jan at Kyoto Univ. Obs. showed clear ordinary superhumps with an amplitude of ~0.15 mag. The baseline was still too short to determine its period. Continuous observations are encouraged. Best, Yusuke

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[vsnet-newvar 9040] ASASSN-20pv: no major variations yet
by Taichi Kato 23 Jan '22

23 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.

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[vsnet-newvar 9039] ASASSN-22as: new SU UMa (or even WZ Sge?) star in the period gap
by Taichi Kato 23 Jan '22

23 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.

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[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.

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