- ID:
- ivo://anusf.anu.au/macho
- Title:
- The Massive Compact Halo Object (MACHO) Project Data Archive
- Short Name:
- MACHO
- Date:
- 18 Jun 2019 20:15:24
- Publisher:
- ivo://anusf.anu.au
- Description:
- The MACHO Project was a collaboration between scientists at the Mt. Stromlo and Siding Spring Observatories, the Center for Particle Astrophysics at the Santa Barbara, San Diego, and Berkeley campuses of the University of California, and the Lawrence Livermore National Laboratory. Our primary aim was to test the hypothesis that a significant fraction of the dark matter in the halo of the Milky Way is made up of objects like brown dwarfs or planets: these objects have come to be known as MACHOs, for MAssive Compact Halo Objects. The signature of these objects is the occasional amplification of the light from extragalactic stars by the gravitational lens effect. The amplification can be large, but events are extremely rare: it was necessary to monitor photometrically several million stars for a period of 10 years in order to obtain a useful detection rate. For this purpose we built a two channel system that employed eight 2048*2048 CCDs, mounted on the 50 inch telescope at Mt. Stromlo. The MACHO project data archive consists of approximately 127,000 two-colour images of fields collected between 1992 and 2003 covering the large and small Magellanic clouds and the galactic bulge and two-colour light-curves for approximately 18 million stars in the LMC and galactic bulge.
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- ID:
- ivo://nci.org.au/macho
- Title:
- The Massive Compact Halo Object (MACHO) Project Data Archive
- Short Name:
- MACHO
- Date:
- 23 Jul 2015 02:55:45
- Publisher:
- ivo://nci.org.au
- Description:
- The MACHO Project was a collaboration between scientists at the Mt. Stromlo and Siding Spring Observatories, the Center for Particle Astrophysics at the Santa Barbara, San Diego, and Berkeley campuses of the University of California, and the Lawrence Livermore National Laboratory. Our primary aim was to test the hypothesis that a significant fraction of the dark matter in the halo of the Milky Way is made up of objects like brown dwarfs or planets: these objects have come to be known as MACHOs, for MAssive Compact Halo Objects. The signature of these objects is the occasional amplification of the light from extragalactic stars by the gravitational lens effect. The amplification can be large, but events are extremely rare: it was necessary to monitor photometrically several million stars for a period of 10 years in order to obtain a useful detection rate. For this purpose we built a two channel system that employed eight 2048*2048 CCDs, mounted on the 50 inch telescope at Mt. Stromlo. The MACHO project data archive consists of approximately 127,000 two-colour images of fields collected between 1992 and 2003 covering the large and small Magellanic clouds and the galactic bulge and two-colour light-curves for approximately 18 million stars in the LMC and galactic bulge.
- ID:
- ivo://padc.obspm.planeto/basecom/q/epn_core
- Title:
- The Nançay Cometary Database
- Short Name:
- basecom.epn_core
- Date:
- 02 May 2024 18:54:10
- Publisher:
- Paris Astronomical Data Centre
- Description:
- 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.
- ID:
- ivo://org.gavo.dc/10pcsample/q/cone
- Title:
- The 10 parsec sample in the Gaia era
- Short Name:
- 10pc SCS
- Date:
- 28 Aug 2023 09:24:32
- Publisher:
- The GAVO DC team
- Description:
- A catalogue of 541 nearby (within 10pc of the sun) stars, brown dwarfs, and confirmed exoplanets in 336 systems, as well 21 candidates, compiled from SIMBAD and several other sources. Where available, astrometry and photometry from Gaia eDR3 has been inserted.
25. USGS_WMS
- ID:
- ivo://padc.obspm.planeto/usgs_wms/q/epn_core
- Title:
- USGS_WMS
- Short Name:
- usgs_wms.epn_cor
- Date:
- 17 Apr 2024 13:28:42
- Publisher:
- Paris Astronomical Data Centre - Constructor University
- Description:
- Catalogue of USGS Astrogeology WMS Map Layers
26. vcd
- ID:
- ivo://lmd.jussieu/vcd/q/epn_core
- Title:
- vcd
- Date:
- 19 Apr 2024 00:05:16
- Publisher:
- Laboratoire Méteorologie Dynamique
- Description:
- The database contains some outputs of the VCD for the scenarios : {1) Standard cloud albedo Scenario, solar EUV average conditions ; 2) Standard cloud albedo Scenario, solar EUV minimum conditions ; 3) Standard cloud albedo Scenario, solar EUV maximum conditions ; 4) Low cloud albedo Scenario, solar EUV average conditions ; 5) High cloud albedo Scenario, solar EUV average conditions available}, at different positions of latitude and longitude. These VCD outputs are provided as Votables containing profiles of temperatures, pressures, density and abundances of main species for altitudes between 0 and 349.5 km from the surface.
- ID:
- ivo://padc.obspm.planeto/meteor_showers/q/epn_core
- Title:
- VOEvent meteor shower service
- Short Name:
- Meteor Showers
- Date:
- 08 Mar 2023 13:09:31
- Publisher:
- Paris Astronomical Data Centre
- Description:
- The ephemeris were produced by simulating the ejection of meteoroids from the sunlit hemisphere of cometary nuclei, typically from 0 to 3 au, followed by the propagation of orbits of meteoroids in the Solar System, taking into account the gravity of the Sun, the 8 planets, Pluto, and the Moon, as well as the radiation pressure and the Poynting-Robertson drag. Note that asteroid parent bodies were considered as active (i.e. comet-like bodies) even if they are not active today. The showers are predicted when a planet enters a large enough set of meteoroids, at a distance less than typically 0.01 au. See Vaubaillon J., Colas F., Jorda L. 2005 A new method to predict meteor showers. I. Description of the model, Astronomy and Astrophysics, Volume 439/2 p.751-760, as well as: Vaubaillon J. 2017 A confidence index for forecasting of meteor showers, Planetary and Space Science, Volume 143 p.78-82
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