NStED Holdings

Description of the Database

NStED offers a powerful query and download engine to search for data on individual stars or to search for groups of stars by stellar and exoplanet parameters. All data in NStED are vetted by a team of astronomers and are directly linked to the original literature references.

NStED supports interactive visualization of catalog query results, images, spectra, and time series data, and on-the-fly calculation of stellar parameters. NStED maintains its own stellar cross-identification to minimize ambiguity in multiple star components.

NStED has a dedicated interface for transit survey data sets, including TrES observations of the Kepler field and KELT observations of the Praesepe field.

Stars in NStED

• Core group : Hipparcos catalog, WDS components, Gliese catalog
• Exo-planet host stars not in Core Group added individually
• Stars in Transit survey programs

Stellar and Exoplanet Content

Stellar Content for NStED	Exoplanet Content for NStED
Approximately 140,000 stars	Published parameters for known exoplanets Derived parameters for all the dwarf stars
Published Parameters	Published Parameters
Position, Distances Kinematics Photometry, Colors Spectral type Luminosity Class Metallicity Rotation Activity Indicators Variability Multiplicity	Number of Planets Planetary Mass Orbital Period Orbital semi-major axis Orbital Eccentricity Link to Exoplanet Encyclopedia Entry
Derived Parameters	Predicted Parameters
Temperature Luminosity Radius Mass LSR Space Motion	Habitable Zone Astrometric Wobble Radial Velocity Wobble Earth-sized Transit Depth Jupiter-sized Transit Depth
Associated Data	Associated Data
Images Spectra	For both known exoplanet hosting stars and others stars surveyed High Contrast Images Light curves of Transiting Systems Radial Velocity curves of exoplanet systems
Examples of Associated Data
Next 2000 (N2K) Stars template spectra Coronographic images from Palomar 2MASS image mosaics

Completeness of Published Parameters

The completeness of the data currently within NStED can be found on this page.

Exoplanet Transit Survey Service Content

The transit survey data currently contained within NStED include:

• Observations of the Kepler field by the Trans-atlantic Exoplanet Survey (TrES)
• Observations of the Praesepe field by the Kilodegree Extremely Little Telescope (KELT)
• Observations of NGC2301 by Howell et al.
• Observations of NGC3201, M10, and M12 by von Braun et al.

Exoplanet Transit Survey Content

Survey Region	Number of Stars	Time-Series Filter	Additional Static Filters	Time Span (days)	Number of Epochs
TrES-Lyr1	25947	r, R	B, V	75	~15000
KELT-Praesepe	66637	RK		73	~3000
NGC 2301	3961	R	B, R	14	~150
NGC 3201	58666	V, I	V, I	700	~120
M 10	43930	V, I	V, I	500	~50
M 12	32378	V, I	V, I	500	~50