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High Energy Astrophysics Science Archive Research Center
The High Energy Astrophysics Science Archive Research Center (HEASARC) is the primary archive for NASA missions dealing with extremely energetic phenomena, from black holes to the Big Bang.
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Astrophysics Research and Analysis Program
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Astrophysics Research and Analysis Program
Kepler
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The centuries-old quest for other worlds like our Earth has been rejuvenated by the intense excitement and popular interest surrounding the discovery of hundreds of planets orbiting other stars. There is now clear evidence for substantial numbers of three types of exoplanets; gas giants, hot-super-Earths in short period orbits, and ice giants. The following websites are tracking the day-by-day increase in new discoveries and are providing information on the characteristics of the planets as well as those of the stars they orbit: The Extrasolar Planets Encyclopedia, NASA Exoplanet Archive, New Worlds Atlas, and Current Planet Count Widget. The challenge now is to find terrestrial planets (i.e., those one half to twice the size of the Earth), especially those in the habitable zone of their stars where liquid water and possibly life might exist. The Kepler Mission, NASA Discovery mission #10, is specifically designed to survey a portion of our region of the Milky Way galaxy to discover dozens of Earth-size planets in or near the habitable zone and determine how many of the billions of stars in our galaxy have such planets. Results from this mission will allow us to place our solar system within the continuum of planetary systems in the Galaxy.
COHOWeb at the Space Physics Data Facility (SPDF)
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Hourly-averaged deep space magnetic field, plasma, and ephemerides. This web service includes data from missions including Helios1, Helios2, OMNI_M, Pioneer10, Pioneer11, Pioneer Venus, Stereo-A, Stereo-B, Ulysses, Voyager1, Voyager2, Mariner2, Pioneer6, Pioneer7. The Space Physics Data Facility (SPDF) is the archive of non-solar data for the Heliospheric Science Division (HSD) at NASA's Goddard Space Flight Center.
Astrogeology Science Center Monthly Report, July 1961
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Monthly report to show updates on highlights and noteworthy results, new projects, and visitors. Includes unpublished works and works in progress.
Astrogeology Science Center Monthly Report, October 1961
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Monthly report to show updates on highlights and noteworthy results, personnel, conferences and scientific meetings, and visitors. Includes unpublished works and works in progress.
Astrogeology Science Center Monthly Report, December 1962
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Monthly report to show updates on highlights and noteworthy results, new projects, conferences and scientific meetings, and visitors. Includes unpublished works and works in progress.
Astrogeology Science Center Monthly Report, October 1962
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Monthly report to show updates on highlights and noteworthy results, new projects, personnel, conferences and scientific meetings, and visitors. Includes unpublished works and works in progress.
Astrogeology Science Center Monthly Report, December 1960
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Monthly report to show updates on highlights and noteworthy results, personnel, conferences and scientific meetings, and visitors. Includes unpublished works and works in progress.
Atacama Cosmology Telescope 2008 Southern Survey 148/218 GHz Source Catalog
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This table contains a catalog of 191 extragalactic sources detected by the Atacama Cosmology Telescope (ACT) at 148 and/or 218 GHz in the 2008 Southern survey. Flux densities span 14 -1700 mJy, and the authors use source spectral indices derived using ACT-only data to divide their sources into two subpopulations: 167 radio galaxies powered by central active galactic nuclei (AGN) and 24 dusty star-forming galaxies (DSFGs). They cross-identify 97% of their sources (166 of the AGN and 19 of the DSFGs) with those in currently available catalogs. When combined with flux densities from the Australia Telescope 20-GHz survey and follow-up observations with the Australia Telescope Compact Array, the synchrotron-dominated population is seen to exhibit a steepening of the slope of the spectral energy distribution from 20 to 148 GHz, with the trend continuing to 218 GHz. The ACT dust-dominated source population has a median spectral index, alpha148-218GHz, of 3.7+0.62-0.86, and includes both local galaxies and sources with redshift around 6. Dusty sources with no counterpart in existing catalogs likely belong to a recently discovered subpopulation of DSFGs lensed by foreground galaxies or galaxy groups. The ACT experiment (Swetz et al., 2011, ApJS, 194, 41) is situated on the slopes of Cerro Toco in the Atacama Desert of Chile at an elevation of 5190m. ACT's latitude gives access to both the northern and southern celestial hemispheres. Observations occurred simultaneously in three frequency bands, at 148 GHz (2.0 mm), 218 GHz (1.4 mm) and 277 GHz (1.1 mm) with angular resolutions of roughly 1.4, 1.0 and 0.9 arcminutes, respectively. The ACT-detected source list contains 169 sources selected at 148 GHz with S/N > 5, spanning two decades in flux density, from 14 to 1700 mJy. The 218 GHz map independently yielded 133 sources with S/N > 5. The combination of these two independent source lists from which the present table was constructed gives a total count of 191 sources, with 110 galaxies detected with S/N > 5 at both frequencies. This table was created by the HEASARC in May 2015 based on CDS Catalog J/MNRAS/439/1556/ file table4.dat. This is a service provided by NASA HEASARC .
Astrogeology Science Center Monthly Report, January 1962
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Monthly report to show updates on highlights and noteworthy results, conferences and scientific meetings, and visitors. Includes unpublished works and works in progress.
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