October 2024 - vsnet-campaign-dn - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-campaign-dn 17494] GOTO065054.49+593624.51: end of the type-E rebrighening
by Yusuke Tampo 31 Oct '24

31 Oct '24

GOTO065054.49+593624.51: end of the type-E rebrighening According to the most recent ATLAS forced photometry and AAVSO observations by Nikola Antonov, Arto Oksanen, and Klaus Wenzel, this object dimmed around 18th mag on 2024-10-30, likely an end of its type E brightening. As type-E-rebrighening systems typically show additional short-lived brightenings, daily snapshots are still encouraged. Best regards, Yusuke #ATLAS forced photometry #UTC mag band observer 20241004.59088 13.215 c atlas … [View More]

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[vsnet-campaign-dn 17493] GOTO065054.49+593624.51: type-E rebrightening WZ Sge star?
by Yusuke Tampo 23 Oct '24

23 Oct '24

GOTO065054.49+593624.51: type-E rebrightening WZ Sge star? Recent time-resolved observations reported to VSNET/AAVSO, especially those by Tonny Vanmunster, David Messier, Nikola Antonov, and Ian Sharp, show growing superhumps after its recovery from the short-lived dip around 2024-10-19. Using these time-resolved observations after the dip, the superhump period is obtained as 0.06323(2) d, consistent with previous Tonny's reports to VSNET alerts. These features suggest that this ongoing … [View More]

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[vsnet-campaign-dn 17492] GOTO065054.49+593624.51 - Regular superhumps with period of 0.0627 d
by tonny.vanmunster＠gmail.com 21 Oct '24

21 Oct '24

Dear colleagues Last night's (2024, Oct 20/21) unfiltered CCD observations of GOTO065054.49+593624.51, obtained at CBA Extremdara Observatory, show the emergence of regular superhumps allowing to precisely determine the superhump period of this system. Based on 175 observations obtained over 6.3 hours, and showing 4 distinct superhumps with an amplitude of 0.21 mag, I have now established the superhump period using ANOVA, GLS, Lomb-Scargle and PDM (Peranso 3.0) to be 0.0627 +/- 0.0004 d. … [View More]

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[vsnet-campaign-dn 17491] GOTO065054.49+593624.51 - Refined Superhump Period and First Rebrightening
by tonny.vanmunster＠gmail.com 21 Oct '24

21 Oct '24

Dear colleagues Following my announcement two days ago regarding the detection of (early) superhumps in the light curve of GOTO065054.49+593624.51, I now present an update based on observations from the AAVSO, and additional data contributed by CBA member David Messier and myself. In the first figure below, the AAVSO light curve of GOTO065054.49+593624.51 on the right with (cyan) polynomial fit illustrates a gradual decline in brightness over the first 13 nights, at a rate of … [View More]

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[vsnet-campaign-dn 17489] GOTO065054.49+593624.51 is now optically confirmed as a new WZ Sge-type darf nova
by tonny.vanmunster＠gmail.com 18 Oct '24

18 Oct '24

Dear colleagues, I have just completed my analysis of unfiltered CCD observations of GOTO065054.49+593624.51, acquired on Oct 17/18, 2024 at the CBA Extremadura Observatory in Spain. The observations were made using a 0.40-m f/5.1 telescope and SX-46 CCD camera under moderately clear skies, though conditions were only favorable for about 2.2 hours. Since the discovery announcement by T. Killestein et al. on Oct 4, 2024 (ATEL #16842), I have been observing this object across multiple nights, … [View More]

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[vsnet-campaign-dn 17488] ASASSN-24fy: new bright outburst from a known WZ Sge star candidate
by Yusuke Tampo 04 Oct '24

04 Oct '24

ASASSN-24fy: new bright outburst from a known WZ Sge star candidate ASAS-SN reported a new CV outburst candidate ASASSN-24fy discovered on 2024-10-1.99 at 11.01 mag. This system was indeed suspected to be a WZ Sge-type CV by Pala et al 2020 based on Gaia data. >Gaia J154008.28-392917.6 https://www.aavso.org/vsx/index.php?view=detail.top&oid=844362 https://ui.adsabs.harvard.edu/abs/2020MNRAS.494.3799P/abstract Time-resolved observations are encouraged to detect superhumps and confirm … [View More]

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[vsnet-campaign-dn 17487] TCP J18173469+1803499: new SU UMa-type dwarf nova
by tonny.vanmunster＠gmail.com 02 Oct '24

02 Oct '24

Dear colleagues I have just finished analysing my unfiltered CCD observations of TCP J18173469+1803499, obtained during 4 consecutive nights between 2024, Sep 28/29 and Oct 01/02 at CBA Extremadura Observatory using a 0.40-m f/5.1 telescope and SX-46 CCD camera under clear skies. This object was detected by the New Milky Way (NMW) survey Camera-2, operating at the Astroverty astrofarm in Russia, on Sep 27th. Superhumps started to emerge in my data set of 2024, Sep 29/30, and are now … [View More]

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