منابع مشابه
Dubious Deductions from AGN Survey Data
The participants in this meeting are almost all carrying out the hard work of making many different types of AGN surveys. Since it’s so much easier to criticize other people’s work than to do actual work myself, I’ll just present some demurs regarding recent papers drawing conclusions from various AGN survey data. In particular I’ll mention some questionable interpretations of surveys of Seyfer...
متن کاملThe 2MASS Red AGN Survey
The Two Micron All Sky Survey (2MASS) provides an unprecedented, uniform photometric data set for large samples of AGN discovered at other wavelengths, and also forms the basis to search for previously unknown, obscured AGN. We present the results of a highly efficient near infrared color-based AGN survey using 2MASS that has already discovered 485 new, red AGN and QSOs. The extrapolated surfac...
متن کاملRadio Emission from AGN detected by the VLA FIRST Survey
Using the most recent (April 2003) version of the VLA FIRST survey radio catalog, we have searched for radio emission from > 2800 AGN taken from the most recent (2001) version of the Veron-Cetty and Veron AGN catalog. These AGN lie in the ∼9033 square degrees of sky already covered by the VLA FIRST survey. Our work has resulted in positive detection of radio emission from 775 AGN of which 214 a...
متن کاملDeductions from the Export Basket: Capabilities, Wealth and Trade∗
This paper re-explores the relation between a country’s level of wealth and the mix of products it exports. We argue that both are simultaneously determined by countries’ capabilities i.e. by countries’ productivity and quality levels for each good. Our theoretical setup has two features. (1) Some goods have fewer high-quality producers/countries than others i.e. there is Ricardian comparative ...
متن کاملDeductions with Meaning
In this paper, we consider some of the problems that arise if automated reasoning methods are applied to natural language semantics. It turns that out that the problem of ambiguity has a strong impact on the feasibility of any theorem prover for computational semantics. We briefly investigate the different aspects of ambiguity and review some of the solutions that have been proposed to tackle t...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 2002
ISSN: 0252-9211
DOI: 10.1017/s0252921100030621