Dear colleagues,
I have just finished analysing my unfiltered CCD observations of TCP
J17374270+4915116, obtained over the past 7 nights between 2024, Dec 23/24
and 29/30 at CBA Extremadura Observatory (Spain) using a 0.40-m f/5.1
telescope and SX-46 CCD camera under clear skies. The object started to
develop superhumps on Dec 28/29, which further developed on Dec 29/30.
The resulting light curve clearly shows the presence of regular superhumps
with an amplitude of 0.25 mag, …
[View More]establishing TCP J17374270+4915116 as a new
SU UMa-type dwarf nova. A period analysis, using the ANOVA, Lomb-Scargle,
Generalized-Lomb-Scargle and PDM methods (Peranso 3.0) yields a combined
superhump period of 0.0589 +/- 0.0002d. The object was at mag CV = 14.6 on
Dec 30th.
Image calibration and photometry were done using Phoranso, which allowed me
to simultaenously measure other variables present in the FOV of this new SU
UMa-type dwarf nova.
I will send my observations to AAVSO, CBA and VSNET for further analysis.
With kind regards,
Tonny
---
Tonny Vanmunster
CBA Belgium Observatory
CBA Extremadura Observatory
http://www.cbabelgium.co <http://www.cbabelgium.com/> m
PERANSO : The Light Curve and Period Analysis Software
http://www.peranso.co <http://www.peranso.com/> m
PHORANSO: Photometric Reduction and Analysis Software *** NEW ***
http://www.phoranso.com <http://www.phoranso.com/>
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Dear colleagues,
I have just finished analysing my unfiltered CCD observations of TCP
J03493487+3607319 (aka ASASSN-24hf), obtained on 2024, Dec 23/24, 24/25 and
25/26 at CBA Extremadura Observatory (Spain) using a 0.40-m f/5.1 telescope
and SX-46 CCD camera under clear skies.
The resulting light curve clearly shows the presence of regular superhumps
with an amplitude of 0.23 mag, establishing TCP J03493487+3607319 as a new
SU UMa-type dwarf nova. A period analysis, using the ANOVA, …
[View More]Lomb-Scargle,
Generalized-Lomb-Scargle and PDM methods (Peranso 3.0) yields a combined
superhump period of 0.0697 +/- 0.0002d. The object was at mag CV = 16.7 on
Dec 26th.
Image calibration and photometry were done using Phoranso, which allowed me
to simultaenously measure other variables present in the FOV of this new SU
UMa-type dwarf nova.
I will send my observations to AAVSO, CBA and VSNET for further analysis.
With kind regards,
Tonny
---
Tonny Vanmunster
CBA Belgium Observatory
CBA Extremadura Observatory
http://www.cbabelgium.co <http://www.cbabelgium.com/> m
PERANSO : The Light Curve and Period Analysis Software
http://www.peranso.co <http://www.peranso.com/> m
PHORANSO: Photometric Reduction and Analysis Software *** NEW ***
http://www.phoranso.com <http://www.phoranso.com/>
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TCP J23291172+4127354: new eclipsing WZ Sge-type dwarf nova
TCP J23291172+4127354 was discovered by Y. Nakamura on 2024-12-04.5385
at 14.1 mag (unfiltered). The counterpart in Pan-STARRS1 is g= 21.6
mag (objID= 157753522991272187), hence the outburst amplitude is ~7.5
mag.
http://www.cbat.eps.harvard.edu/unconf/followups/J23291172+4127354.htmlhttps://www.aavso.org/vsx/index.php?view=detail.top&oid=2390566
Time-resolved observations reported by Itoh-san on the 5th and 6th Dec
show double-…
[View More]peaked profiles and superposed eclipses. Its period and
amplitude are obtained as 0.05693(2) d and ~0.5 mag (0.3 mag hump +
0.3 mag eclipse).
Thus TCP J23291172+4127354 is a new (and yet another!) eclipsing WZ
Sge-type dwarf nova.
This would be another nice target for time-resolved photometries.
Best regards,
Yusuke
--
----------------------------------------------
South African Astronomical Observatory, Postdoc fellow
反保 雄介 Yusuke TAMPO
MAIL: tampo(a)kusastro.kyoto-u.ac.jp
MAIL: yusuke(a)saao.ac.za
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Gaia DR3 3130088774241620608: confirmation as a WZ Sge-type dwarf nova
Itoh-san and J. Hambsch have reported the time-resolved observations
of Gaia DR3 3130088774241620608 = TCP J06330104+0303350.
The light curve shows a large-amplitude double-hump profile and
superposed eclipses.
Combining with AAVSO observations by J. Zhao, I obtained the early
superhump+eclipse period as 0.05786(1) d.
The orbital profile amplitude is ~0.5 mag; 0.3 mag early superhump
plus 0.3 mag eclipse.
Therefore, Gaia …
[View More]DR3 3130088774241620608 is now confirmed as an
eclipsing WZ Sge-type.
Time-resolved observations are strongly encouraged!
best regards,
Yusuke
2024年11月29日(金) 15:56 Yusuke Tampo <tampo(a)kusastro.kyoto-u.ac.jp>:
>
> TCP J06330104+0303350 = Gaia DR3 3130088774241620608
>
> TCP J06330104+0303350 was discovered by T. Kojima on 2024-11-28.76 at
> 13.9 mag and now brightened to V=13.4 mag according to TOCP reports.
> http://www.cbat.eps.harvard.edu/unconf/followups/J06330104+0303350.html
>
> This system has already been pointed as a WZ Sge-type cataclysmic
> variable candidate in Inight et al 2024, named Gaia DR3
> 3130088774241620608.
> https://www.aavso.org/vsx/index.php?view=detail.top&oid=2389763
> https://ui.adsabs.harvard.edu/abs/2024MNRAS.tmp.2451I/abstract
>
> This outburst is a great opportunity to determine its outburst nature
> as well as derive its superhump periods.
> Time-resolved observations are encouraged.
>
> Best regards
> Yusuke
>
> --
> ----------------------------------------------
>
> South African Astronomical Observatory, Postdoc fellow
> 反保 雄介 Yusuke TAMPO
> MAIL: tampo(a)kusastro.kyoto-u.ac.jp
> MAIL: yusuke(a)saao.ac.za
>
> ----------------------------------------------
--
----------------------------------------------
South African Astronomical Observatory, Postdoc fellow
反保 雄介 Yusuke TAMPO
MAIL: tampo(a)kusastro.kyoto-u.ac.jp
MAIL: yusuke(a)saao.ac.za
----------------------------------------------
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