Sentences with phrase «dr1 photometry»

And converting starlight efficiently into a detectable electronic signal was crucial for transit photometry.

He was particularly intrigued by a presentation on transit photometry, a theoretical technique that would make it possible to bring those planets into view.

To find an Earth, you'd better have photometry that's unassailable at the one - hundredth of 1 percent level.

We showed that we could do photometry on 6,000 stars simultaneously.

«William Borucki, of the NASA Ames Research Center in Mountain View, California,» won the astronomy prize for «conceiving the observational technique of transit photometry that raised the tantalizing prospect of sighting Earth - like planets orbiting other stars, and [for] leading the 25 - year - long development of the Kepler mission.»

Called photometry, it detects the slight but regular dimming in a star's light when a planet transits in front of it.

Borucki was convinced that looking for planetary transits through photometry would be simpler and cheaper.

«Thus far, solutions based on incandescent lamps have been used in photometry, i.e. in measuring light detected by the human eye,» explains Tomi Pulli, a doctoral student at Aalto University.

The Physikalisch - Technische Bundesanstalt (PTB) has now developed a mathematical procedure which yields clearly improved results and can be applied in numerous fields of radiometry and photometry.

William Borucki, of the NASA Ames Research Center in Mountain View, California, has captured the astronomy prize for two achievements: conceiving the observational technique of transit photometry that raised the tantalizing prospect of sighting Earth - like planets orbiting other stars, and leading the 25 - year - long development of the Kepler mission, which in 2009 placed a telescope in space to make those observations.

For the brighter targets, CoRoT provides photometry in 3 different uncalibrated «colors» that can be used to reject planet candidates.

The photometry is obtained from onboard aperture photometry by means of large aperture masks, with a size and shape adapted to the large psf of its exoplanet focal plane, where 50 % of the flux is contained in an elliptical area of about 35 23.

Applying aperture photometry on the azimuthally averaged deconvolved PACS images and using a modified blackbody of the form Bν · λ − β, as expected for a grain emissivity Qabs ~ λ − β with β equal to 1.2 (representing amorphous carbon, Mennella et al. 1998), we derived a dust temperature between 108 ± 5 K at 20 ′ ′ and 40 ± 5 K at 180 ′ ′.

(See a CCD field image of CM Draconis and comparison stars used in differential photometry from the Transits of Extrasolar Planets — TEP — Network of astronomers.)

The VATT 1.8 m telescope's large aperture enables high - precision photometry even on the faintest EDEN / TS stars.

Research interests: the design, construction, and operation of robotic telescopes in support of automated astronomy, the development of automated high - precision photometry

Multiwaveband photometry of the irradiated brown dwarf WD0137 — 349B.

Contemporaneous photometry in the optical and near - IR reveals a weaker modulation, but consistent with the X-ray period.

Hubble photometry of one of the three galaxy groups identified at z ~ 8, with the galaxies in the image labeled with their corresponding approximate photometric redshifts.

We present ten years of archival and new photometry of the companion from LINEAR, CRTS, PTF, the Palomar 60 - inch, and LCOGT.

Selection criteria for the 30 - star shortlist included: X-ray luminosity, rotation, spectral types or color, kinematics, metallicity, and Strömgren photometry (Margaret C. Turnbull, 2004).

«Multicolour UBVRI photometry of stars in M 17», Astronomy and Astrophysics, Vol.

Following subtraction of the sky background from these frames, differential aperture photometry was carried out on Amalthea and a nearby field star.

Using our new photometry, we measure the density of the star KELT - 11 to 4 %.

Potential transit signals are subjected to further analysis using the pixel - level data, wh... ▽ More We provide updates to the Kepler planet candidate sample based upon nearly two years of high - precision photometry (i.e., Q1 - Q8).

We combined photometry, medium / high - resolution spectroscopy, adaptive optics / speckle imaging and archival survey images to rule out any false positive detection scenarios, validate the planet, and further characterize the system.

Version 2 incorporates tiny cosmetic changes to match final published version, including a revised Figure 1 that uses the most recent AB Pic b photometry from Biller et al (2013)

Our longest... ▽ More We present a preliminary analysis of the cool pulsating white dwarf GD 1212, enabled by more than 11.5 days of space - based photometry obtained during an engineering test of the two - reaction - wheel - controlled Kepler spacecraft.

PSO J060.3200 +25.9644 (a.k.a. DANCe J040116.80 +255752.2) was previously identified as a likely member of the Pleiades (age $ \ approx125 $ Myr) based on photometry and astrometry, but its VL - G gravity classification and near - infrared photometry imply a much younger age and thus point to Taurus membership.

Research interests: automated astronomy with robotic telescopes, high - precision photometry, luminosity and magnetic cycles in solar - type stars, the search for extrasolar planets, chromospherically active stars, pulsating variable stars More

For these studies we use the high - precision time - resolved Hubble Space Telescope near - infrared spectroscopy and Spitzer Space Telescope photometry in multiple programs.

Revising the properties of the associated planet candidates based on the updated host star characteristics and refitting the transit photometry, we find that our sample contains 20 planets or planet candidates with radii smaller than 1.25 Earth radii, 20 super-Earths (1.25 - 2 Earth radii), 20 small Neptunes (2 - 4 Earth radii), three large Neptunes (4 - 6 Earth radii), and eight giant planets (> 6 Earth radii).

We obtained follow - up optical spectra of 105/141 candidate host stars and 8/16 eclipsing binaries to improve stellar properties and to identify spectroscop... ▽ More We present 151 planet candidates orbiting 141 stars from K2 campaigns 5 - 8 (C5 - C8), identified through a systematic search of K2 photometry.

We identified several candidates around known stellar members using a combination of color selection and spectral energy distribution... ▽ More We have combined optical and NIR photometry from Pan-STARRS 1 and UKIDSS to search the young (5 - 10 Myr) star - forming region of Upper Scorpius for wide (~ 400-4000 AU) substellar companions down to ~ 5 Mjup.

We identify PSO J060.3200 +25.9644 (near - infrared spectral type L1) and PSO J077.1033 +24.3809 (L2) as new members of Taurus based on... ▽ More We present the discovery of eight young M7 - L2 dwarfs in the Taurus star - forming region and the Scorpius - Centaurus OB Association, serendipitously found during a wide - field search for L / T transition dwarfs using Pan-STARRS1 (optical) and WISE (mid-infrared) photometry.

Using the very high precision Kepler photometry, and follow - up observations, our confidence that these signals re... ▽ More We present the discovery of a super-earth-sized planet in or near the habitable zone of a sun - like star.

The focus from AAVSO will be V - band photometry for the active star Ross 154; we are targeting round - the - clock coverage to disentangle stellar activity from possible exoplanet detections.

This unique and unprecedented coverage is the first time that a nova has any substantial amount of fast photometry.

Our latest article, by Eloy Rodríguez, explains how we are using photometry to complement radial velocity data from HARPS.

Here we combine K2 photometry with spectroscopy, adaptive optics imaging, and archival survey images to analyze two small planets orbiting the nearby, field age, M dwarfs K2 - 26 (EPIC 202083828) and K2 - 9.

This brings the total number of KOIs and planet... ▽ More \ We present the sixth catalog of Kepler candidate planets based on nearly 4 years of high precision photometry.

The presence of a second, non-transiting planet was inferred from the transit time variations (TTVs) of Kepler - 19b, over 8 quarters of Kepler photometry, although neither mas... ▽ More We report a detailed characterization of the Kepler - 19 system.

Twenty - two months of photometry are used for the purpose of characterizing each of the new candidates.

For most of the candidates (85 %), the transit depths measured with Kepler are consistent with the depths measured with Spitzer as expected for planetary objects, while we find that the most discrepant measurements are due to the presence of unresolved stars that dilute the photometry.

The initial transit signal was identified in KELT - North survey data, and the planetary nature of the occulter was established using a combination of follow - up photometry, high - resolution imaging, high - resolution spectroscopy, and precise radial velocity measurements.

The planets are mostly smaller than Neptune (21/26 planets) as in the Kepler mission and all have short periods ($ P < 50 $ d) due to the duration of the K2 photometry.

Using public Kepler photometry, we demonstrate that the two observed transits can be uniquely attributed to the 704.2 day period.

The rotation periods delineate a tight sequence in the NGC6811 color - period diagram from ~ 1 day at mid... ▽ More We present rotation periods for 71 single dwarf members of the open cluster NGC6811 determined using photometry from NASA's Kepler Mission.

Abstract: The NASA K2 mission uses photometry to find planets transiting stars of various types.

Because the star is evolving up the sub-giant branch, K2 - 66b receives a high level... ▽ More We report precise mass and density measurements of two extremely hot sub-Neptune-size planets from the K2 mission using radial velocities, K2 photometry, and adaptive optics imaging.