Results 21 to 30 of about 477,952 (254)

Mauna Kea High Speed Photometry of Transits of the Extrasolar Planet HD 209458B [PDF]

open access: hybridOpen Astronomy, 2003
Using high-speed photometry techniques, three transits of the extrasolar planet across the disk of the star HD 209458 have been observed. The combination of a WET-style 3-channel photometer and an excellent site yielded millimagnitude photometric ...
Sullivan Denis J., Sullivan Tiri
doaj   +2 more sources

A Six Year, Low-resolution, Multibroadband Transit Photometry Study of HD 189733b

open access: goldThe Astronomical Journal, 2022
Transmission spectroscopy offers an invaluable opportunity to characterize the atmospheres of exoplanets. We present new ground-based optical transmission spectra of the hot Jupiter HD 189733b, derived from nine transits observed over a six year time ...
Cristilyn N. Gardner-Watkins   +15 more
doaj   +2 more sources

Identification and Removal of Noise Modes in Kepler Photometry [PDF]

open access: yes, 2012
We present the Transiting Exoearth Robust Reduction Algorithm (TERRA) --- a novel framework for identifying and removing instrumental noise in Kepler photometry. We identify instrumental noise modes by finding common trends in a large ensemble of light curves drawn from the entire Kepler field of view.
Erik A. Petigura   +3 more
arxiv   +3 more sources

ECCENTRICITY FROM TRANSIT PHOTOMETRY: SMALL PLANETS IN KEPLER MULTI-PLANET SYSTEMS HAVE LOW ECCENTRICITIES [PDF]

open access: green, 2015
Solar system planets move on almost circular orbits. In strong contrast, many massive gas giant exoplanets travel on highly elliptical orbits, whereas the shape of the orbits of smaller, more terrestrial, exoplanets remained largely elusive.
Vincent Van Eylen, Simon Albrecht
openalex   +3 more sources

Estimations of orbital parameters of exoplanets from transit photometry by using dynamical constraints [PDF]

open access: yes, 2006
The probability of the detection of Earth-like exoplanets may increase in the near future after the launch of the space missions using the transit photometry as observation method.
C.D. Murray   +7 more
core   +4 more sources

TERMS Photometry of Known Transiting Exoplanets [PDF]

open access: green, 2011
The Transit Ephemeris Refinement and Monitoring Survey (TERMS) conducts radial velocity and photometric monitoring of known exoplanets in order to refine planetary orbits and predictions of possible transit times.
Alan Payne   +34 more
core   +5 more sources

An ultra-short-period super-Earth with an extremely high density and an outer companion [PDF]

open access: yesScientific Reports
We present the discovery and characterization of a new multi-planetary system around the Sun-like star K2-360 (EPIC 201595106). K2-360 was first identified in K2 photometry as the host of an ultra-short-period (USP) planet candidate with a period of 0.88 
John H. Livingston   +20 more
doaj   +2 more sources

Precision Near Infrared Photometry For Exoplanet Transit Observations - I : Ensemble Spot Photometry for An All-Sky Survey [PDF]

open access: yes, 2012
Near-IR observations are important for the detection and characterization of exoplanets using the transit technique, either in surveys of large numbers of stars or for follow-up spectroscopic observations of individual planets. In a controlled laboratory experiment, we imaged $\sim 10^4$ critically sampled spots onto an Teledyne Hawaii-2RG (H2RG ...
C. Clanton   +4 more
arxiv   +3 more sources

Pushing the precision limit of ground-based eclipse photometry [PDF]

open access: yesarXiv, 2008
Until recently, it was considered by many that ground-based photometry could not reach the high cadence sub-mmag regime because of the presence of the atmosphere. Indeed, high frequency atmospheric noises (mainly scintillation) limit the precision that high SNR photometry can reach within small time bins.
Anderson, D. R.   +6 more
arxiv   +4 more sources

TOI-199 b: A Well-characterized 100 day Transiting Warm Giant Planet with TTVs Seen from Antarctica

open access: yesThe Astronomical Journal, 2023
We present the spectroscopic confirmation and precise mass measurement of the warm giant planet TOI-199 b. This planet was first identified in TESS photometry and confirmed using ground-based photometry from ASTEP in Antarctica including a full 6.5 hr ...
Melissa J. Hobson   +51 more
doaj   +1 more source

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