منابع مشابه
Near-infrared Photometry of Blazars
The rapid variability of blazars in almost all wavelengths is now well established. Two days of observations were conducted at the Palomar Observatory during the nights of 25 and 26 February 1997 with the 5-meter Hale telescope, in order to search for rapid variability in the near-infrared (NIR) bands J, H, Ks for a selection of eight blazars. With the possible exception of 1156+295 (4C 29.45),...
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The theme of this year's conference is “Making Mathematics Fun, Accessible and Challenging through Technology”. Version 6 of Mathematica, released in May 2007, is instantly interactive, allowing teachers and students to easily construct live interfaces to illustrate and investigate mathematical concepts at all levels [1]. Over 2000 examples of these interactive capabilities, including a number ...
متن کاملInfrared Photometry of the Nebulosity around Quasars
Measurements of the nebulosity around quasars have been carried out in the near-infrared. The colors of the host galaxies found in these observations are consistent with those of normal galaxies. The luminosities are also similar to those of normal galaxies but are slightly brighter than average. Subject headings: galaxies: photometry infrared: sources quasars
متن کاملMacho Proper Motions From Optical/Infrared Photometry
Optical/infrared photometry can double the number of proper motion measurements of Massive Compact Objects (MACHOs) relative to single band photometry. The proper motion of a MACHO can be measured by nding the ratio q of the (known) radius of the source star to the Einstein radius of the MACHO, q = s= e. A classic method for doing this is to look for the e ect on the light curve of the nite siz...
متن کاملMaking Legacy Data Accessible for Xml Applications
This paper presents design and implementation of DB2XML, a tool for transforming data from relational databases into XML documents. Document type declarations (DTDs) are generated describing the characteristics of the data making the documents self contained and usable as a data exchange format. DB2XML is written in Java and accesses databases through JDBC drivers. It can be used as a standalon...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2009
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/200912163