Reference: Röser, S., 1999, DIVA - Beyond HIPPARCOS and Towards GAIA, in: Rev. In this poster we present a few examples of astrophysical topics where DIVA can open new horizons. This pairing was seen by William Herschel in 1781. PTI obtained first fringes in 1995, and has been in routine scientific operations since 1998.
#DOUBLE INTERFEROMETER FOR VISUAL ASTROMETRY PDF#
Full PDF Package Download Full PDF Package. About 30' west of it is a magnitude 10 companion which is unrelated. The Palomar Testbed Interferometer (PTI) is a near-infrared, long-baseline interferometer located at the Palomar Observatory. CCD photometry and astrometry for visual double and multiple stars of the HIPPARCOS catalogue. It will perform astrometric and photometric measurements. beta Serpentis (15 46 11.21 +15 25 28.9) is a magnitude 3.7 star of spectral type A2IV some 155 light years away. By providing a wealth of high-quality observational data, DIVA will influence almost every field of astronomy. A new method of ground-based dierential astrometry with measurement precisions on the order of 105 arc-seconds for bright stars separated by 0.051.0 arcseconds has been developed for use at the Palomar Testbed Interferometer. DIVA (Double Interferometer for Visual Astrometry) is a Fizeau interferometer on a small satellite. The performance of DIVA will significantly exceed that of the famous HIPPARCOS mission in all important aspects. icated to astrometry (Battrick 1994), building on the re-sults of the Hipparcos mission. Additionally, broad-band photometry will be obtained for all these 35 million objects, together with multi-channel intermediate-band photometry for the brightest 10 million stars (V <= 13.5). The power of interferometry for high-precision astrometry is thus due to two factors: the straightforward relation (Eq. DIVA will measure the positions, proper motions and parallaxes of all stars down to 15th visual magnitude. If launched in 2003, final data from DIVA will be available in 2007. The poster presents a brief overview of the scientific objectives of the planned astrometric and photometric minisatellite DIVA (Double Interferometer for Visual Astrometry), to be built in collaboration of several German astronomical institutes.
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