Decametric radio observation from Nancay decameter array. The Nancay Decameter Array (NDA) at the Station de Radioastronomie de Nancay (SRN) is a phased array of 144 "Teepee" helicoidal antenna, half of which being Right Handed (RH) polarized and the other half being Left Handed (LH) polarized. Four receivers are currently connected to the NDA, sampling data in spectral ranges within 5 to 80 MHz.
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.
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.
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/