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An absolute calibration of DENIS (deep near infrared southern sky survey)

An absolute calibration of the DENIS photometric system is presented. It includes the determination of the overall transmission profiles in the 3 bands, namely i, J and Ks, combining contributions from atmosphere, telescope mirrors, instrument lenses and dichroics, filters, and detectors. From these normalized profiles, isophotal and effective wavelengths are computed, using the...

The Baade-Wesselink p-factor applicable to LMC Cepheids

Context. Recent observations of LMC Cepheids bring new constraints on the slope of the period-projection factor relation (hereafter Pp relation) that is currently used in the Baade-Wesselink (hereafter BW) method of distance determination. The discrepancy between observations and theoretical analysis is particularly significant for short period CepheidsAims. We investigate three...

Calibrating the Cepheid period-luminosity relation from the infrared surface brightness technique - I. The p-factor, the Milky Way relations, and a universal K-band relation

, J. , Jefferys , W. H. , Gieren , W. P. , & Fouqué , P. 2005b, ApJ , 631 , 572 Benedict , G. F. , McArthur , B. E. , Fredrick , L. W. , et al. 2002 , AJ, 124 , 1695 Benedict, G. F. , McArthur , B. E ... . , Bersier , D. , Mourard , D. , & Coudé de Foresto , V. 2004a , A &A, 416 , 941 Kervella , P. , Bersier , D. , Mourard , D. , et al. 2004b, A &A, 428 , 587 Kervella, P. , Fouqué , P. , Storm , J. , et al

Calibrating the Cepheid period-luminosity relation from the infrared surface brightness technique - II. The effect of metallicity and the distance to the LMC,

Conf . Proc. , 1170 , 3 Barnes , T. G. , & Evans , D. S. 1976 , MNRAS, 174 , 489 Barnes, T. G. , Storm , J. , Jefferys , W. H. , Gieren , W. P. , & Fouqué , P. 2005 , ApJ, 631 , 572 Benedict , G. F ... . , et al. 2008 , Acta Astron ., 58 , 163 Storm, J. , Carney , B. W. , Gieren , W. P. , et al. 2004 , A &A, 415 , 531 Storm, J. , Gieren , W. P. , Fouqué , P. , Barnes , T. G. , & Gómez , M. 2005 , A &A

ExELS: an exoplanet legacy science proposal for the ESA Euclid mission – I. Cold exoplanets

The Euclid mission is the second M-class mission of the ESA Cosmic Vision programme, with the principal science goal of studying dark energy through observations of weak lensing and baryon acoustic oscillations. Euclid is also expected to undertake additional Legacy Science programmes. One such proposal is the Exoplanet Euclid Legacy Survey (ExELS) which will be the first survey...

The long-period Galactic Cepheid RS Puppis - I. A geometric distance from its light echoes

databases at the CDS, Strasbourg (France), and NASA’s Astrophysics Data System Bibliographic Services. Barnes , T. G. , Storm , J. , Jefferys , W. H. , Gieren , W. P. , & Fouqué , P. 2005 , ApJ, 631 , 572

Cepheid distances from infrared long-baseline interferometry - III. Calibration of the surface brightness-color relations

The recent VINCI/VLTI observations presented in Paper I have nearly doubled the total number of available angular diameter measurements of Cepheids. Taking advantage of the significantly larger color range covered by these observations, we derive in the present paper high precision calibrations of the surface brightness-color relations using exclusively Cepheid observations...

Calibration of the distance scale from galactic Cepheids - II. Use of the HIPPARCOS calibration

New estimates of the distances of 36 nearby galaxies is presented. These are based on the calibration of the V- and I-band Period-Luminosity relations for galactic Cepheids measured by the HIPPARCOS mission. The distance moduli are obtained in a classical way. The statistical bias due to the incompleteness of the sample is corrected according to the precepts introduced by...

CO(1–0) observation of isolated late-type galaxies

We present 12CO(–0) line observations of 99 galaxies obtained with the SEST 15 m, the Kitt Peak 12 m and the IRAM 30 m telescopes. The target galaxies were selected from the catalogue of isolated galaxies of Karachentseva ([CITE]). These data are thus representative of the CO properties of isolated late-type galaxies. All objects were observed in their central position, those...

Difference imaging photometry of blended gravitational microlensing events with a numerical kernel

The numerical kernel approach to difference imaging has been implemented and applied to gravitational microlensing events observed by the PLANET collaboration. The effect of an error in the source-star coordinates is explored and a new algorithm is presented for determining the precise coordinates of the microlens in blended events, essential for accurate photometry of difference...

First DENIS I-band extragalactic catalog

This paper presents the first I-band photometric catalog of the brightest galaxies extracted from the Deep Near Infrared Survey of the Southern Sky (DENIS) An automatic galaxy recognition program has been developed to build this provisional catalog. The method is based on a discriminating analysis. The most discriminant parameter to separate galaxies from stars is proved to be...

New neighbours: II. An M9 dwarf at 4 pc, DENIS-P J104814.7-395606.1

We present the discovery of a previously unknown member of the immediate solar neighbourhood, DENIS-P J104814.7-395606.1 (hereafter DENIS 1048-39), identified while mining the DENIS database for new nearby stars. A HIRES echelle spectrum obtained with the 10-m Keck telescope shows that it is an M9 dwarf. DENIS 1048-39 has a very bright apparent magnitude () for its spectral type...

The EChO science case

28 & P. Figueira 62 & G. Filacchione 30 & L. Fletcher 12 & M. Focardi 48 & S. Fossey 1 & P. Fouqué 54 & J. Frith 31 & M. Galand 26 & L. Gambicorti 56 & P. Gaulme 8 & R. J. García López 28 & A. Garcia

The HARPS search for southern extra-solar planets - VII. A very hot Jupiter orbiting HD 212301

We report the discovery of a planetary companion orbiting the F8V star HD 212301. This is the first “very hot Jupiter” discovered by a radial velocity survey. The detection was made possible by the HARPS spectrograph installed at the ESO 3.6 m telescope in Cerro La Silla, Chile. The data were carefully analyzed to exclude activity induced effects on the measured radial velocities...

The EROS2 search for microlensing events towards the spiral arms: the complete seven season results

. Beaulieu 5 X. Charlot F. Couchot 1 C. Coutures 5 F. Derue 1 R. Ferlet 5 P. Fouqué 2 7 J.-F. Glicenstein B. Goldman A. Gould 4 D. Graff 4 M. Gros J. Haïssinski 1 C. Hamadache J. de Kat É. Lesquoy 5 C. Loup 5

OGLE-2008-BLG-510: first automated real-time detection of a weak microlensing anomaly - brown dwarf or stellar binary?⋆

The microlensing event OGLE-2008-BLG-510 is characterized by an evident asymmetric shape of the peak, promptly detected by the Automated Robotic Terrestrial Exoplanet Microlensing Search (ARTEMiS) system in real time. The skewness of the light curve appears to be compatible both with binary-lens and binary-source models, including the possibility that the lens system consists of...

A systematic fitting scheme for caustic-crossing microlensing events

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, we present an analysis of OGLE-2007-BLG-472, a double-peaked Galactic microlensing event with a source crossing the whole caustic structure in less than three days. In order to...

A brown dwarf orbiting an M-dwarf: MOA 2009–BLG–411L

A&A Astronomy & Astrophysics E. Bachelet P. Fouqué C. Han A. Gould M. D. Albrow J.-P. Beaulieu E. Bertin I. A. Bond G. W. Christie D. Heyrovský K. Horne U. G. Jørgensen D. Maoz M. Mathiasen N ... , ApJ, 730 , 79 Kato , D. , Nagashima , C. , Nagayama , T. , et al. 2007 , PASJ, 59 , 615 Kervella , P. , & Fouqué , P. 2008 , A &A, 491 , 855 Mao , S. , & Paczynski , B. 1991 , ApJ, 374 , L37 Marigo , P

Limits on additional planetary companions to OGLE 2005-BLG-390L

Aims. We investigate constraints on additional planets orbiting the distant M-dwarf star OGLE 2005-BLG-390L, around which photometric microlensing data has revealed the existence of the sub-Neptune-mass planet OGLE 2005–BLG–390Lb. We specifically aim to study potential Jovian companions and compare our findings with predictions from core-accretion and disc-instability models of...

The DENIS Point Source Catalogue towards the Magellanic Clouds

We have compiled the near infrared Point Source Catalogue (PSC) towards the Magellanic Clouds (MCs) extracted from the data obtained with the Deep Near Infrared Survey of the Southern Sky – DENIS (Epchtein et al. 1997). The catalogue covers an area of of square degrees centered on , for the Large Magellanic Cloud (LMC) and square degrees centered on , for the Small Magellanic...