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High-dispersion spectroscopy of EY Cyg obtained from data spanning twelve years show, for the first time, the radial velocity curves from both emission and absorption line systems, yielding semi-amplitudes K_{em}=24+/- 4 km s^-1 and…

Astrophysics · Physics 2009-11-11 J. Echevarria , R. Michel , R. Costero , S. Zharikov

The majority of cataclysmic variable (CV) stars contain a stochastic noise component in their light curves, commonly referred to as flickering. This can significantly affect the morphology of CV eclipses and increases the difficulty in…

We present H and Ks-band photometry bracketing the secondary eclipse of the hot Jupiter TrES-3b using the Wide-field Infrared Camera on the Canada-France-Hawaii Telescope. We detect the secondary eclipse of TrES-3b with a depth of…

Earth and Planetary Astrophysics · Physics 2015-05-19 Bryce Croll , Ray Jayawardhana , Jonathan J. Fortney , Loic Albert , David Lafrenière

(abridged) We report eclipse mapping of time resolved spectroscopy of the dwarf nova IP Pegasi on the late decline from the May 1993 outburst. The spiral arms are still visible some 8 days after the onset of the outburst. Their fractional…

Astrophysics · Physics 2009-11-07 Raymundo Baptista , Carole A. Haswell , Gino Thomas

We analyse a unique set of time-resolved echelle spectra of the dwarf nova IP Peg, obtained at ESO's NTT with EMMI. The dataset covers the wavelength range of 4000-7500A and shows Balmer, HeI, HeII and heavier elements in emission. IP Peg…

Astrophysics · Physics 2008-07-03 C. Papadaki , H. M. J. Boffin , D. Steeghs

We report the discovery of a new totally-eclipsing binary (RA=06:40:29.11; Dec=+38:56:52.2; J=2000.0; Rmax=17.2 mag) with an sdO primary and a strongly irradiated red dwarf companion. It has an orbital period of Porb=0.187284394(11) d and…

We present optical photometry of XTE J2123-058 during its quiescent state taken in 1999 and 2000. The dominant feature of our R-band light curve is the ellipsoidal modulation of the secondary star, however, in order to fit this…

Astrophysics · Physics 2009-11-07 T. Shahbaz , C. Zurita , J. Casares , G. Dubus , P. A. Charles , R. Mark Wagner , E. Ryan

Context: We present results of time-resolved optical spectroscopy and photometry of the short-orbital period dwarf nova EI Psc. Aims: This study aims to determine fundamental system parameters of EI Psc, study properties of accretion…

Solar and Stellar Astrophysics · Physics 2025-05-29 J. Kára , S. Zharikov , M. Wolf , N. Vaidman , A. Agishev , S. Khokhlov , C. E. Chavez

We present new eclipse observations for one of the hottest "hot Jupiters" WASP-18b, for which previously published data from HST WFC3 and Spitzer have led to radically conflicting conclusions about the composition of this planet's…

Earth and Planetary Astrophysics · Physics 2019-01-02 L. Kedziora-Chudczer , G. Zhou , J. Bailey , D. D. R. Bayliss , C. G. Tinney , D. Osip , K. D. Colon , A. Shporer , D. Dragomir

U Gem is unique in having a direct measurement of K1 = 107 +- 2 km/s, Long et al. 1999). We present high-resolution optical spectra of the dwarf nova U Gem in quiescence taken to test the accuracy to which the HST value can be recovered…

Astrophysics · Physics 2009-11-11 E. Unda-Sanzana , T. R. Marsh , L. Morales-Rueda

We present the first detailed optical study of the cataclysmic variable SRGA J115215.0$-$510656, based on new time-resolved photometric and spectroscopic observations complemented by long-baseline Transiting Exoplanet Survey Satellite…

Although comparatively bright, the cataclysmic variable GY Hya has not attracted much attention in the past. As part of a project to better characterize such systems photometrically, we observed light curves in white light, each spanning…

Solar and Stellar Astrophysics · Physics 2017-03-22 Albert Bruch , Berto Monard

We present Spitzer Space Telescope time series photometry of the exoplanet system HD 189733 spanning two times of secondary eclipse, when the planet passes out of view behind the parent star. We estimate the relative eclipse depth in 5…

We explore the infrared spectrum of a three-dimensional dynamical model of planet HD209458b as a function of orbital phase. The dynamical model predicts day-side atmospheric pressure-temperature profiles that are much more isothermal at…

Astrophysics · Physics 2011-02-11 J. J. Fortney , C. S. Cooper , A. P. Showman , M. S. Marley , R. S. Freedman

We calculate the planet-star flux-density ratios as a function of wavelength from 0.5 microns to 25 microns for the transiting extrasolar giant planets TrES-1 and HD209458b and compare them with the recent Spitzer/IRAC-MIPS secondary…

Astrophysics · Physics 2009-11-10 A. Burrows , I. Hubeny , D. Sudarsky

We present contemporaneous, broadband, near-infrared spectroscopy (0.9-2.45 micron) and H-band photometry of the black hole X-ray binary, XTE J1118+480. We determined the fractional dilution of the NIR ellipsoidal light curves of the donor…

Solar and Stellar Astrophysics · Physics 2015-06-12 J. Khargharia , C. S. Froning , E. L. Robinson , D. M. Gelino

We present an analysis of Spitzer/IRAC primary transit and secondary eclipse lightcurves measured for HD209458b, using Gaussian process models to marginalise over the intrapixel sensitivity variations in the 3.6 micron and 4.5 micron…

Earth and Planetary Astrophysics · Physics 2015-08-06 Thomas M. Evans , Suzanne Aigrain , Neale Gibson , Joanna K. Barstow , David S. Amundsen , Pascal Tremblin , Pierre Mourier

We present the results of spectral investigations of the cataclysmic variable IP Peg in quiescence. Optical spectra obtained on the 6-m telescope at the Special Astrophysical Observatory (Russia), and on the 3.5-m telescope at the…

Astrophysics · Physics 2009-11-07 V. V. Neustroev , N. V. Borisov , H. Barwig , A. Bobinger , K. H. Mantel , D. Simic , S. Wolf

We present Spitzer Space Telescope infrared photometric time series of the transiting extrasolar planet system TrES-1. The data span a predicted time of secondary eclipse, corresponding to the passage of the planet behind the star. In both…

We present the X-ray analysis of dwarf nova EY Cyg using the 45 ks \textit{XMM-Newton} observatory archival data obtained in quiescence. We find orbital modulations in X-rays. We simultaneously fitted EPIC pn, MOS1 and MOS2 data using a…

High Energy Astrophysical Phenomena · Physics 2020-01-22 Armin Nabizadeh , Solen Balman