Zobrazeno 1 - 10
of 23
pro vyhledávání: '"de Ponthiere, Pierre"'
We present the results of a photometry campaign of TU Com performed over a five-year time span. The analysis showed that the possible Blazhko period of 75 days published by the General Catalogue of Variable Stars is not correct. We identified two Bla
Externí odkaz:
http://arxiv.org/abs/1605.03242
The results presented are a continuation of observing campaigns conducted by a small group of amateur astronomers interested in the Blazhko effect of RR Lyrae stars. The goal of these observations is to confirm the RR Lyrae Blazhko effect and to dete
Externí odkaz:
http://arxiv.org/abs/1407.4227
Autor:
de Ponthiere, Pierre, Bonnardeau, Michel, Hambsch, Franz-Joseph, Krajci, Tom, Menzies, Kenneth, Sabo, Richard
We present the results of multi-longitude observations of KV Cancri, an RR Lyrae star showing an irregular Blazhko effect. With a pulsation period of 0.50208 day, the times of light curve maxima are delayed by 6 minutes per day. This daily delay regu
Externí odkaz:
http://arxiv.org/abs/1310.4190
The results of an observation campaign of V0784 Ophiuchi over a time span of two years have revealed a multi-periodic Blazhko effect. A Blazhko effect for V0784 Ophiuchi has not been reported previously. From the observed light curves, 60 pulsation m
Externí odkaz:
http://arxiv.org/abs/1306.5904
The Blazhko effect in V1820 Orionis and its period were reported for the first time by Wils et al. (2006) from a data analysis of the Northern Sky Variability Survey. The results of additional V1820 Orionis observations over a time span of 4 years ar
Externí odkaz:
http://arxiv.org/abs/1212.0897
Autor:
de Ponthiere, Pierre, Borgne, Jean-Francois Le, Fumagalli, F., Hambsch, Franz-Josef, Krajci, Tom, Llapasset, J-M, Menzies, Kenneth, Nobile, Marco, Sabo, Richard
We present the results of collaborative observations of three RR Lyrae stars (CX Lyr, NU Aur and VY CrB) which have a strong Blazhko effect. This work has been initiated and performed in the framework of the GEOS RR Lyr Survey (Groupe Europ\'een d'Ob
Externí odkaz:
http://arxiv.org/abs/1212.0034
Publikováno v:
2009,JAVSO,37,117
The Blazhko effect in CX Lyr has been reported for the first time by Le Borgne et al. (2007). The authors have pointed out that the Blazhko period was not evaluated accurately due to dataset scarcity. The possible period values announced were 128 or
Externí odkaz:
http://arxiv.org/abs/1212.0026
Autor:
Shears, Jeremy, Brady, Steve, Bolt, Greg, Campbell, Tut, Collins, Donald F., Cook, Lewis M., Crawford, Timothy R., Koff, Robert, Krajci, Tom, McCormick, Jennie, Nelson, Peter, Patterson, Joseph, de Ponthiere, Pierre, Potter, Mike, Rea, Robert, Roberts, George, Sabo, Richard, Staels, Bart, Vanmunster, Tonny
We present photometry of the first reported superoutburst of the dwarf nova VSX J074727.6+065050 during 2008 January and February. At its brightest the star reached magnitude 11.4 and this was followed by a slow decline at 0.09 mag/d for 19 days, cor
Externí odkaz:
http://arxiv.org/abs/0905.0061
Autor:
Kato, Taichi, Pavlenko, Elena P., Maehara, Hiroyuki, Nakajima, Kazuhiro, Andreev, Maksim, Shugarov, Sergei Yu., de Ponthiere, Pierre, Brady, Steve, Klingenberg, Geir, Shears, Jeremy, Imada, Akira
We observed the 2006 superoutburst of SDSS J080434.20+510349.2 during its plateau phase, rebrightening phase, and post-superoutburst final decline. We found that this object is a grazing eclipsing system with a period of 0.0590048(2) d. Well-defined
Externí odkaz:
http://arxiv.org/abs/0903.1685
During 2006 March the first confirmed superoutburst of the dwarf nova SDSS J080434.20+510349.2 was observed using unfiltered CCD photometry. Time-series photometry revealed superhumps with a period of 0.0597 +/- 0.0011 d and an amplitude of 0.2 magni
Externí odkaz:
http://arxiv.org/abs/0705.4616