Sentences with phrase «using photometric data»

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Wu leads a team that has developed a method to effectively select quasars in the distant universe based on optical and near - infrared photometric data, in particular using data from the Sloan Digital Sky Survey and NASA's Wide - Field Infrared Explorer, or WISE, satellite.

This publication makes use of data products from the Widefield Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles; the Jet Propulsion Laboratory / California Institute of Technology, which is funded by NASA; the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center / California Institute of Technology, funded by NASA; and the American Association of Variable Star Observers (AAVSO) Photometric All - Sky Survey (APASS), whose funding is provided by the Robert Martin Ayers Sciences Fund and the AAVSO Endowment (https://www.aavso.org/aavso-photometric-all-sky-survey-data-release-1).

The transit signals were detected in photometric data from the Kepler satellite, and were confirmed to arise from planets using a combination of large transit - timing variations, radial - velocity variations, Warm - Spitzer observations, and statistical analysis of false - positive probabilities.

We distill these candidates into sets of 104 validated planets (57 in multi-planet systems), 30 false positives, and 63 remaining candidat... ▽ More We present 197 planet candidates discovered using data from the first year of the NASA K2 mission (Campaigns 0 - 4), along with the results of an intensive program of photometric analyses, stellar spectroscopy, high - resolution imaging, and statistical validation.

These techniques use only Kepler photometric data.

We derive new photometry and confirm the nearly daily photometric variability of PZ Tel A. Using literature data spanning 38 yr, we show that the star also exhibits a long - term variability trend.

Due to the availability of data from three observing runs separated by ~ 10 and 1 month timescales, we are able to demonstrate clear evidence for evolution of the photometric amplitudes, and hence spot patterns, over the 10 month gap, although we are not able to constrain the timescales for these effects in detail due to limitations imposed by the large gaps in our sampling, preventing use of the phase information.