United States Naval Observatory, Flagstaff Station
Description:
The U.S. Naval Observatory (USNO) announces the release of the first version of the Naval Observatory Merged Astrometric Dataset (NOMAD). The 100 GB dataset contains astrometric and photometric data for over 1 billion stars derived from the Hipparcos, Tycho-2, UCAC2, and USNO-B catalogs for astrometry and optical photometry, supplemented by 2MASS near-infrared photometry. For each unique star the "best" astrometric and photometric data are chosen from the source catalogs and merged into a single dataset. A sequence of priorities is followed and NOMAD contains flags to identify the source catalogs and gives cross-reference identifications. This first release of NOMAD is not a compiled catalog; that is, if a star is identified in more than 1 of the above mentioned catalogs, only 1 catalog entry is chosen. Thus the local and global systematic errors of the various source catalogs will be present in this version of NOMAD. All source catalogs astrometric data are on the International Celestial Reference System within the limitations of the source catalogs. For more information and data retrieval see our homepage www.nofs.navy.mil/nomad.
NSSDC is the permanent archive for NASA space science mission data: astronomy and astrophysics, solar and space plasma physics, and planetary and lunar science. As permanent archive, NSSDC teams with NASA's discipline-specific space science "active archives" which provide access to data to researchers and to the general public. NSSDC also serves as NASA's primary active archive for space physics mission data and for selected NASA astrophysics missions. It provides access to several geophysical models and to data from some non-NASA mission data. In addition to supporting active space physics and astrophysics researchers, NSSDC also supports the general public both via several public-interest web-based services (e.g., the Photo Gallery) and via the offline mailing of CD-ROMs, photoprints, and other items. NSSDC provides online information about NASA and non-NASA spacecraft and experiments, and about data management standards and technologies.
OAO-2 Ultraviolet Spectra: An Atlas of Stellar Spectra
Short Name:
OAO-2
Date:
24 Apr 2006 21:24:06
Publisher:
NASA
Description:
This data set is a subset of ultraviolet stellar spectra comprising the highest quality data obtained with both spectrometers aboard the OAO 2. The first file of the data set contains ultraviolet stellar fluxes for 164 bright stars in the spectral range between 1200 to 1300 A, with resolutions of about 22 A in the region from 3600 to 1850 A and about 12 A in the region from 1850 to 1160 A. Files 2 and 3 contain spectra for 132 stars in the region 1200-1850 A and 34 stars in the region 1800-3600 A, respectively, with resolutions as stated above. The data have been published in graphical and tabular form by A.D. Code and M.R. Meade, Astrophys. J. Suppl., v. 39, p. 195, 1979; M.R. Meade and A.D. Code, Astrophys. J. Suppl., v. 42, p. 283, 1980.
Predictions of stellar occultations by the main planetary satellites
Short Name:
voccdb.epn_core
Date:
19 Apr 2024 14:16:01
Publisher:
Paris Astronomical Data Centre
Description:
The VOccDB database provides prediction and parameters of stellar
occultations by the main planetary satellites. Observations of a
stellar occultations help to better determine the size and the shape
of the occulting body, as well as its astrometric position at the
milli-arcsecond level precision. Only the main moons of giant planets
Jupiter, Saturn, Uranus and Neptune are considered in the event
prediction database. Predictions are provided over period 2023-2032,
up to visual magnitude 12 for the biggest satellites, and magnitude 14
for other satellites. For each stellar occultation event prediction,
the database provides circumstances and observational data, date and
timing of the occultation, star position and magnitude, excepted
duration, etc.
"The growth of the Tharsis volcanic complex on Mars during
Noachian/Hesperian era induced a reorientation of the spin axis of the
planet (true polar wander). This service gives access to a map of Mars
topography before Tharsis formation (Early Noachian) and a map of Mars
topography before true polar wander (Late Noachian/Early Esperian),
from the model described in Bouley, S., Baratoux, D., Matsuyama, I. et
al. Late Tharsis formation and implications for early Mars. Nature
531, 344â347 (2016). https://doi.org/10.1038/nature17171 ."
Euskal Herriko Unibertsitatea / Universidad del Pais Vasco /
University of the Basque Country
Description:
Images, maps, photometries and other kind of planetary graphic
platforms made by amateur astronomers. Data is received by the
astronomers themselves and can be subject of change
PVO Spacecraft VSO Ephemeris and Spacecraft Orientation ASCII Data
Collection
Short Name:
PVO-PHEM-ASC
Date:
15 Dec 2022 19:27:35
Publisher:
Planetary Data System
Description:
This collection includes Pioneer Venus Orbiter (PVO) ephemeris,
spacecraft position and orientation data in Venus Solar Orbital (VSO)
coordinates. This collection is sampled every 12 seconds near
periapsis, and at 1 minute or 10 minute rates in the solar wind, the
lowest rates near apoapsis. Planetocentric and heliocentric position
vectors and solar zenith angle (Sun-Venus-PVO) are also provided. The
VSO parameters are derived from the PVO Supplemental Experimenter Data
Records (SEDR), other parameters are taken directly from the SEDR
dataset. The original data were all binary and contained a
non-standard time representation. No software was provided to convert
these data to ASCII. PDS created ASCII versions of these files in
response to user concerns regarding the ease of use of these data.
PVO Spacecraft VSO Ephemeris and Spacecraft Orientation Original
Binary Data Collection
Short Name:
PVO-PHEM-BIN
Date:
15 Dec 2022 19:28:02
Publisher:
Planetary Data System
Description:
This collection includes Pioneer Venus Orbiter (PVO) ephemeris,
spacecraft position and orientation data in Venus Solar Orbital (VSO)
coordinates. This collection is sampled every 12 seconds near
periapsis, and at 1 minute or 10 minute rates in the solar wind, the
lowest rates near apoapsis. Planetocentric and heliocentric position
vectors and solar zenith angle (Sun-Venus-PVO) are also provided. The
VSO parameters are derived from the PVO Supplemental Experimenter Data
Records (SEDR), other parameters are taken directly from the SEDR
dataset. The original data files submitted to the PDS are IGPP
flatfiles. An IGPP flatfile is a collection of 2 files, each of which
could be considered a table. The data file (.FFD) is a binary table of
data values. The header file (.FFH) is an ASCII table which describes
the data file (.FFD) and is used by the UCLA/IGPP Data Flow System (a
software package).
Quasi Thermal Noise pectroscopy on High Frequency Receiver Data Data
Collection
Short Name:
CO-RPWS-HFR-QTN
Date:
15 Dec 2022 19:29:14
Publisher:
Planetary Data System
Description:
This collection contains RPWS-HFR Quasi Thermal Noise (QTN)
spectroscopy supplied CDF files containing a time series of thermal
plasma moments (density and temperature). QTN data products are
generated only when the QTN analysis is applicable.
<b>GAIA-DEM</b><br/>
GAIA-DEM is a database of Differential Emission Measure (DEM) maps. The DEM is a
measure of the thermal structure of the coronal plasma, representing the quantity of
light emitting plasma along the line of sight, at different temperatures. In GAIA-DEM, the
DEM is modelled by a specific function of temperature, namely a Gaussian of the
logarithm of electron temperature. GAIA-DEM maps are then maps of the DEM
maximum temperature, of the DEM integral (total Emission Measure), and DEM width (in
temperature). These maps are obtained by inversion from the SDO/AIA EUV images in 6
coronal channels (9.4, 13.1, 17.1, 19.3, 21.1, and 33.5 nm). In addition, maps of the χ²
for the inversion are provided.<br/>
GAIA-DEM is available from a specific interface at
<a href="http://medoc-dem.ias.u-psud.fr/">http://medoc-dem.ias.u-psud.fr</a>, as
well as part of the generic MEDOC interface which is currently located at
<a href="https://idoc-medoc.ias.u-psud.fr/">https://idoc-medoc.ias.u-psud.fr</a>.
These interfaces are based on the CNES SiTools2 framework.
GAIA-DEM is also available from IDL and Python scripts, using a specialization of the
generic SiTools2 IDL and Python clients developed by MEDOC.
*** GAIA-DEM *** GAIA-DEM is a database of Differential Emission
Measure (DEM) maps. The DEM is a measure of the thermal structure of
the coronal plasma, representing the quantity of light emitting plasma
along the line of sight, at different temperatures. In GAIA-DEM, the
DEM is modelled by a specific function of temperature, namely a
Gaussian of the logarithm of electron temperature. GAIA-DEM maps are
then maps of the DEM maximum temperature, of the DEM integral (total
Emission Measure), and DEM width (in temperature). These maps are
obtained by inversion from the SDO/AIA EUV images in 6 coronal
channels (9.4, 13.1, 17.1, 19.3, 21.1, and 33.5nm). In addition, maps
of the ϲ for the inversion are provided.
GAIA-DEM is available from a specific interface at
http://medoc-dem.ias.u-psud.fr/, as well as part of the generic MEDOC
interface which is currently located at http://idocmedoc-
test.ias.u-psud.fr/. These interfaces are based on the CNES SiTools2
framework. GAIA-DEM is also available from IDL and Python scripts,
using a specialization of the generic SiTools2 IDL and Python clients
developed by MEDOC.
The SimDAL repository hosts numerical projects descriptions as standard XML documents following the Simulation Data Model serialization xsd. It allows clients to search (fulltext) for simulation projects or associated protocols of interest and get URIs towards other SimDAL components: SimDAL Search and SimDAL Data Access.
SkyBoT is a VO service which allows to seek and identify solar system objects (planet, satellites, asteroids, comets) in any field of view at a given epoch (cone-search method). It provides also a solar system object name resolver which convert the name or the designation of solar system objects into their celestial coordinates at a given epoch (resolver method). The SkyBoT service are available through a Web interface and a Web service (SOAP+WSDL+HTTP) which implements the IVOA Simple Cone-Search protocol.
SkyBoT is a VO service which allows to seek and identify solar system objects (planet, satellites, asteroids, comets) in any field of view at a given epoch (cone-search method). It provides also a solar system object name resolver which convert the name or the designation of solar system objects into their celestial coordinates at a given epoch (resolver method). The SkyBoT service are available through a Web interface and a Web service (SOAP+WSDL+HTTP) which implements the IVOA Simple Cone-Search protocol.
Skylab Catalog of Far-Ultraviolet Objective-Prism Spectrophotometry
Short Name:
Skylab FUV
Date:
24 Apr 2006 21:32:00
Publisher:
NASA
Description:
This data set is a machine-readable version of the catalog of Far- Ultraviolet Objective-Prism Spectrophotometry (S-019). The data are on one ASCII tape with two files, created on an IBM 3081 computer. The data set contains arrays of ultraviolet flux measurements at wavelengths of 1300 to 4200 A. The spectra were digitized with a PDS 1010 A microdensitometer, and each spectrum was scanned in a series of strips 30 microns wide. This catalog contains data on 494 stars. The data on each star are quite complex and include a number of parameters in addition to the adopted fluxes. Accompanying this data set is a copy of a document entitled "Documentation for the Machine-Readable Version of the Catalogue of Far-Ultraviolet Objective-Prism Spectrophotometry: Skylab Experiment S-019, Ultraviolet Stellar Astronomy" by R.S. Hill and L.E. Brotzman, 1984 (B35702-000A). For more information on this data set, see the above document or contact Dr. Karl Henize, Code SN3, NASA Johnson Space Center, Houst
SBNAF public database of thermal infrared observations of small
bodies in the solar system. Our database collects thermal emission
measurements of small Solar Systems targets that are otherwise
available in scattered sources and gives a complete description of the
data, with all information necessary to perform direct scientific
calculations and without the need to access additional, external
resources. See the details here: https://ird.konkoly.hu/
Planetary Atmospheres Research Unit - Royal Belgian Institute for
Space Aeronomy
Description:
Profiles of species in Venus atmosphere terminator. Data retrieved
from calibrated spectra obtained with the SPICAV-SOIR instrument on
board the Venus Express spacecraft. These spectra can be checked on
the ESA PSA repository. See: A.C. Vandaele et al., Contribution from
SOIR/VEX to the updated Venus International Reference Atmosphere
(VIRA), Adv. Space Res. (2015),
http://dx.doi.org/10.1016/j.asr:2015.08.012.
The database contains profiles of atmospheric CO2 density and
temperature derived thereof, and ozone concentration profiles, all
derived from the first year(s) of SPICAM UV stellar occultation
observations (Forget et al. 2009, Lebonnois et al. 2006). The database
also includes the full dataset of four Martian years of aerosol
extinction profiles from SPICAM UV solar occultations (Määttänen et
al. 2013).
VO-compliant publication of Schmidt survey SRC-J of the southern sky digitized with the MAMA microdensitometer at the Observatoire de Paris Image Analysis Centre (CAI).
The main activity at Nançay is the development and application of new radio techniques to fundamental research in astrophysics and astronomy. A number of instruments are operated on behalf of researchers in France and worldwide to conduct scientific programmes of observation of the Universe, including the nearby Earth-Space environment, the study of the Sun and the solar system, and the study of distant stars and galaxies in the Universe.
Tabulated vector magnetic field vs. time in payload coordinates Data
Collection
Short Name:
MVN-MAG-P1
Date:
15 Dec 2022 19:28:59
Publisher:
Planetary Data System
Description:
Vector magnetic field data acquired by the Fluxgate Magnetometer
instrument aboard the MAVEN spacecraft. The data are calibrated and
provided in physical units (nT). The time resolution depends on the
telemetry rate available when the data were taken. The data are
expressed in Payload coordinates.
Tabulated vector magnetic field vs. time in planetocentric coordinates
Data Collection
Short Name:
MVN-MAG-PC
Date:
15 Dec 2022 19:26:33
Publisher:
Planetary Data System
Description:
Vector magnetic field data acquired by the Fluxgate Magnetometer
instrument aboard the MAVEN spacecraft. The data are calibrated and
provided in physical units (nT). The time resolution depends on the
telemetry rate available when the data were taken. The data are
expressed in Planetocentric coordinates.
Tabulated vector magnetic field vs. time in Sun-state coordinates Data
Collection
Short Name:
MVN-MAG-SS
Date:
15 Dec 2022 19:29:47
Publisher:
Planetary Data System
Description:
Vector magnetic field data acquired by the Fluxgate Magnetometer
instrument aboard the MAVEN spacecraft. The data are calibrated and
provided in physical units (nT). The time resolution depends on the
telemetry rate available when the data were taken. The data are
expressed in Planetocentric coordinates.
A short course on the VO's SQL-like query language, the Astronomical
Data Query Language. It also covers basic operation of some TAP user
agents. It is available as a multipage HTML rendering for online
perusal as well as a one-file PDF.
Since 1973, the 18-cm lines of the OH radical have been
systematically observed in a number of comets with the Nançay radio
telescope. This allowed an evaluation of the cometary water production
rates and their evolution with time, as well as a study of several
physical processes: the excitation mechanisms of the OH radio lines,
the expansion of the cometary atmospheres, their anisotropy in
relation with non-gravitational forces, the Zeeman effect in relation
with the cometary magnetic field. The Nançay observations of 53
cometary apparitions between 1982 and 2009 are now organized in this
database.
The NASA/IPAC Extragalactic Database (NED) provides a comprehensive fusion
of multi-wavelength data for hundreds of millions of objects located beyond
the Milky Way galaxy. As new observations are published in NASA mission
archives, journal articles and sky survey catalogs, they are cross-identified
with prior measurements and integrated in a unified database. Numerous derived
quantities are also provided to facilitate scientific research. For more
information see http://ned.ipac.caltech.edu/
Ulysses Jupiter Encounter Cospin Anisotropy Telescope (AT) Flux Data
Collection
Short Name:
ULY-COSPIN-AT
Date:
04 Mar 2024 19:08:32
Publisher:
Planetary Data System
Description:
This collection contains data submitted to the Planetary Data System
(PDS) by the Ulysses COSPIN investigators, for the Ulysses Jupiter
Encounter, 1992-01-25 to 1992-02-17 (days 25-48 inclusive).
