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441. The Mid-Infrared Galaxy Atlas
ID:
ivo://irsa.ipac/IRAS/Images/MIGA
Title:
The Mid-Infrared Galaxy Atlas
Short Name:
MIGA
Date:
27 Oct 2022 19:00:00
Publisher:
NASA/IPAC Infrared Science Archive
Description:
The Mid-Infrared Galaxy Atlas (MIGA) is a high resolution image atlas of the Galactic plane at 12 microns and 25 microns, it has been produced using the HIRES processed infrared data from the IRAS satellite. It is a counterpart to the far-infrared IRAS Galaxy Atlas (IGA) and the Extended IRAS Galaxy Atlas (EIGA).
442. The NASA/IPAC Extragalactic Database
ID:
ivo://ned.ipac/NED
Title:
The NASA/IPAC Extragalactic Database
Short Name:
NED
Date:
10 Jun 2021 18:18:18
Publisher:
NASA/IPAC
Description:
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/
443. The NASA/IPAC Extragalactic Database
ID:
ivo://ned.ipac/Basic_Data_By_Reference
Title:
The NASA/IPAC Extragalactic Database
Short Name:
NED_by_refcode
Date:
10 Jun 2021 18:17:21
Publisher:
NASA/IPAC
Description:
NED service to query for Objects by Reference Code: 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. This service searches NED's master list of extragalactic objects by (19 digit) journal reference code. It returns object names, positions, and redshifts if available. It also returns counts of bibliographic references, notes, photometry, positions, redshifts, diameters, and positional associations.
444. The Naval Observatory Merged Astrometric Dataset
ID:
ivo://astronet.ru/cas/nomad
Title:
The Naval Observatory Merged Astrometric Dataset
Short Name:
nomad
Date:
17 Jun 2006 18:44:05
Publisher:
Sternberg Astronomical Institute Virtual Observatory Project
Description:
The U.S. Naval Observatory (USNO) announces the release of the first version of the Naval Observatory Merged Astrometric Dataset (NOMAD). The almost 100 GB dataset contains astrometric and photometric data for about 1.1 billion stars derived from the Hipparcos, Tycho-2, UCAC2, Yellow-Blue 6, 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. Catalogs used: Hipparcos Catalogue: Positions, proper motions and errors are used; however, no parallaxes are included in NOMAD. Tycho-2: is a compiled catalog with proper motions derived from the combination of Hipparcos satellite measures (mainly its star tracker data) and over 100 ground-based astrometric catalogs which provided the early epoch data. Most of the Tycho B and V magnitudes (which includes Hipparcos stars) went into NOMAD as well. UCAC2: is also a compiled catalog, including all catalogs used for Tycho-2 (thus also including Tycho and Hipparcos astrometric data), plus the recent epoch ground-based observations of the UCAC project. However, only 86\% of the sky are covered by UCAC2 (the north celestial pole area is missing). For stars not in USNO-B, the UCAC2 magnitude has been used as "R" photometry value, although the UCAC2 bandpass is between V and R. YB6: (Yellow-Blue catalog version 6) is unpublished data obtained from complete scans of the NPM and SPM plates performed on the PMM at USNO, Flagstaff Station. The limiting magnitude is about 18 and YB6 is the major source of faint B and V magnitudes in NOMAD. 2MASS: the near IR photometry without errors or flags has been copied into NOMAD. For those stars without optical counterparts, the 2MASS astrometric information was used (no proper motions). USNO-B: provides positions and proper motions for most faint stars in NOMAD. Most R photometry in NOMAD comes from this catalog. For more details, see the catalog introductions for each individual catalog used in NOMAD. NOMAD is not a compiled catalog, no average values are taken if a star appears in more than 1 source catalog. Each astrometric and photometric entry in NOMAD is taken from a specific source catalog. The priority order is as follows: astrometry brighter than 8 mag: Hipparcos Tycho-2 UCAC2 astrometry of fainter stars: Hipparcos UCAC2 Tycho-2 USNO-B YB6 2MASS photometry: optical Tycho-2 (incl. Hipparcos stars) YB6 USNO-B UCAC2 photometry: near IR 2MASS
445. TheoSSA - Theoretical Stellar Spectra Access
ID:
ivo://org.gavo.dc/theossa/q/ssa
Title:
TheoSSA - Theoretical Stellar Spectra Access
Short Name:
theossa
Date:
27 Dec 2024 08:31:03
Publisher:
The GAVO DC team
Description:
TheoSSA provides spectral energy distributions based on model atmosphere calculations. Currently, we serve results obtained using the Tübingen NLTE Model Atmosphere Package (TMAP) for hot compact stars.
446. TheoSSA TMAP Web Interface
ID:
ivo://org.gavo.dc/theossa/q/web
Title:
TheoSSA TMAP Web Interface
Short Name:
tmap_web
Date:
27 Dec 2024 08:31:03
Publisher:
The GAVO DC team
Description:
TheoSSA provides spectral energy distributions based on model atmosphere calculations. Currently, we serve results obtained using the Tübingen NLTE Model Atmosphere Package (TMAP) for hot compact stars.
447. The Second U.S. Naval Observatory CCD Astrograph Catalog (UCAC2)
ID:
ivo://astronet.ru/cas/ucac2
Title:
The Second U.S. Naval Observatory CCD Astrograph Catalog (UCAC2)
Short Name:
ucac2
Date:
17 Jun 2006 18:44:05
Publisher:
Sternberg Astronomical Institute Virtual Observatory Project
Description:
The UCAC2 is the second release of the ongoing UCAC project, designed to observe the entire sky for R magnitudes of about 7.5 to 16. The observed positional errors are about 20 mas for the stars in the 10 to 14 magnitude range, and about 70 mas at the limiting magnitude of R ~16. For up-to-date information on the project, see our web page at http://ad.usno.navy.mil/ucac/ . This web page will also serve as the location that the UCAC team will post addenda to the UCAC2 catalog. The UCAC2 is a high density, highly accurate, astrometric catalog of 48,330,571 stars covering the sky from -90 to +40 degrees in declination and going up to +52 degrees in some areas. The northern limit is a function of right ascension. Proper motions and photometry are provided for all stars. Positions and proper motions are on the ICRS (International Celestial Reference System) and given at the epoch J2000.0. The UCAC2 has a number of major differences with respect to UCAC1. These differences include: - much larger sky coverage - reduced systematic errors of CCD observations - positions given at a standard epoch (J2000.0) - the addition of several new catalogs for improved proper motions - photometry in the J, H, and K_s bands from the 2MASS project - data in binary format for direct access - inclusion of software to aid users in quick access of the data Additional details of the data are found in Sections 3, 4, and 5 of this document.
448. The SkyMapper Project Data Archive
ID:
ivo://anusf.anu.au/skymapper
Title:
The SkyMapper Project Data Archive
Short Name:
SkyMapper
Date:
03 Dec 2018 18:40:19
Publisher:
ivo://anusf.anu.au
Description:
The SkyMapper Project Data Archive
449. The SkyMapper Project Data Archive
ID:
ivo://nci.org.au/skymapper
Title:
The SkyMapper Project Data Archive
Short Name:
SkyMapper
Date:
23 Jul 2015 02:56:24
Publisher:
ivo://nci.org.au
Description:
The SkyMapper Project Data Archive
450. The Southern H-Alpha Sky Survey Atlas: Continuum
ID:
ivo://nasa.heasarc/skyview/shassa
Title:
The Southern H-Alpha Sky Survey Atlas: Continuum
Short Name:
SHASSA
Date:
07 Mar 2025
Publisher:
NASA/GSFC HEASARC
Description:
The Southern H-Alpha Sky Survey Atlas is the product of a wide-angle digital imaging survey of the H-alpha emission from the warm ionized interstellar gas of our Galaxy. This atlas covers the southern hemisphere sky (declinations less than +15 degrees). The observations were taken with a robotic camera operating at Cerro Tololo Inter-American Observatory (CTIO) in Chile. The atlas consists of 2168 images covering 542 fields. There are four images available for each field: <b>H-alpha</b>, <b>Continuum</b>, <b>Continuum-Corrected</b> (the difference of the H-alpha and Continuum images), and <b>Smoothed</b> (median filtered to 5 pixel, or 4.0 arcminute, resolution to remove star residuals better). The <a href="https://amundsen.swarthmore.edu/SHASSA">SHASSA website</a> has more details of the data and the status of this and related projects. Images can also be obtained from the <a href="https://amundsen.astro.swarthmore.edu/SHASSA/#Images">Download Images</a> section at the SHASSA site. Provenance: John E. Gaustad (Swarthmore College), Peter R. McCullough (University of Illinois), Wayne Rosing (Las Cumbres Observatory), and Dave Van Buren (Extrasolar Research Corporation). This is a service of NASA HEASARC.

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