J. P. Beaulieu

Water in HD 209458b's atmosphere from 3.6 - 8 microns IRAC photometric observations in primary transit (2009)

Beaulieu, J. P., Kipping, D. M., Batista, V., Tinetti, G., Ribas, I., Carey, S., ...

The hot Jupiter HD 209458b was observed during primary transit at 3.6, 4.5, 5.8 and 8.0 microns using the Infrared Array Camera (IRAC) on the Spitzer Space Telescope. We detail here the procedures we...

Sub-Saturn Planet MOA-2008-BLG-310Lb: Likely To Be In The Galactic Bulge (2009)

Janczak, Julia, Fukui, A., Dong, Subo, Monard, B., Kozlowski, Szymon, Gould, A., ...

We report the detection of sub-Saturn-mass planet MOA-2008-BLG-310Lb and argue that it is the strongest candidate yet for a bulge planet. Deviations from the single-lens fit are smoothed out by...

Mass measurement of a single unseen star and planetary detection efficiency for OGLE 2007-BLG-050 (2009)

Batista, V., Dong, Subo, Gould, A., Beaulieu, J. P., Cassan, A., Christie, G. W., ...

We analyze OGLE-2007-BLG-050, a high magnification microlensing event (A ~ 432) whose peak occurred on 2 May, 2007, with pronounced finite-source and parallax effects. We compute planet detection...

New Magellanic Cloud R Coronae Borealis and DY Per type stars from the EROS-2 database: the connection between RCBs, DYPers and ordinary carbon stars (2009)

Tisserand, P., Wood, P. R., Marquette, J. B., Afonso, C., Albert, J. N., Andersen, J., ...

R Coronae Borealis stars (RCB) are a rare type of evolved carbon-rich supergiant stars that are increasingly thought to result from the merger of two white dwarfs, called the Double degenerate...

OGLE-2005-BLG-071Lb, the Most Massive M Dwarf Planetary Companion? (2009)

Dong, Subo, Gould, Andrew, Udalski, Andrzej, Anderson, Jay, Christie, G. W., Gaudi, B. S., ...

We combine all available information to constrain the nature of OGLE-2005-BLG-071Lb, the second planet discovered by microlensing and the first in a high-magnification event. These include...

A systematic fitting scheme for caustic-crossing microlensing events (2009)

Kains, N., Cassan, A., Horne, K., Albrow, M. D., Dieters, S., Fouqué, P., ...

We outline a method for fitting binary-lens caustic-crossing microlensing events based on the alternative model parametrization proposed and detailed by Cassan. As an illustration of our methodology,...

RoboNet-II: Follow-up observations of microlensing events with a robotic network of telescopes (2009)

Horne, K., Snodgrass, C., Dominik, M., Allan, A., Steele, I., Bramich, D.M., ...

RoboNet-II uses a global network of robotic telescopes to perform follow-up observations of microlensing events in the Galactic Bulge. The current network consists of three 2m telescopes located in...

OGLE-2005-BLG-071Lb, the Most Massive M Dwarf Planetary Companion? (2009)

Christie, G.W., Gaudi, B.S., Kubiak, M., Szymanski, M.K., Pietrzynski, G., Soszynski, I., ...

We combine all available information to constrain the nature of OGLE-2005-BLG-071Lb, the second planet discovered by microlensing and the first in a high-magnification event. These include...

RoboNet-II: Follow-up observations of microlensing events with a robotic network of telescopes (2008)

Tsapras, Y., Street, R., Horne, K., Snodgrass, C., Dominik, M., Allan, A., ...

RoboNet-II uses a global network of robotic telescopes to perform follow-up observations of microlensing events in the Galactic Bulge. The current network consists of three 2m telescopes located in...

AND (2007)

J. R. Buchler, Z. Kolláth, J. P. Beaulieu, M. J. Goupil, Observatoire De Paris

The observed Magellanic Cloud (MC) Cepheid data pose a new challenge to both stellar structure and stellar evolution. The Fourier analysis of the LMC and SMC data indicate that the 2�1 resonance (P...

EROS VARIABLE STARS : Discovery of Beat Cepheids in the Small Magellanic Cloud and the effect of metallicity on pulsation. (2007)

J. P. Beaulieu, Beaulieu Krockenberger, D. D. Sasselov, C. Renault, R. Ferlet

. We report the discovery of eleven beat Cepheids in the Small Magellanic Cloud, using data obtained by the EROS microlensing survey. Four stars are beating in the fundamental and first overtone mode...

EROS 2 proper motion survey: a field brown dwarf and an L dwarf companion to LHS 102 (1999)

Goldman, B, Delfosse, X, Forveille, T, Afonso, C, Alard, C, Albert, J N, ...

We report the discovery of two L dwarfs (the new spectral class defined for dwarfs cooler than the M type) in a two-epoch CCD proper motion survey of 413 square degrees, complemented by infrared...

A slope variation in the Period-Luminosity relation for short period SMC Cepheids (1998)

F. Bauer, J. N. Albert, J. Andersen, R. Ansari, E. Aubourg, ...

. We present the Period--Luminosity relations from 290 Cepheids towards the LMC and 590 Cepheids towards the SMC. The two data sets were obtained using the two wide field CCD cameras of the EROS 2...