Two-point angular correlation function of quasar distribution for SDSS DR3 and 2QZ catalogues
نویسندگان
چکیده
منابع مشابه
The Angular Correlation Function of Quasars from SDSS DR3
We estimate the two-point angular correlation function (CF) of quasars from SDSS DR3 using a special method of comparison random catalog generation. The best-fit value for the CF power-law index is found to be α = 0.78 ± 0.18 on the 2 < θ < 250 arcmin interval. This is lower (though in marginal agreement) than earlier result of Myers et al. (2005) based on SDSS DR1 catalogue of photometrically-...
متن کاملAngular Correlation Function of Quasars from SDSS DR3
We estimate the two-point angular correlation function of quasars from SDSS DR3. Fitting yields the best-fit value of the power-law index α = 0.92± 0.08. This agrees with earlier results of Myers et al. [4] based on SDSS DR1 catalogue of photometricaly-classified quasars.
متن کاملTwo - Point Angular Correlation Function )
The Two Point Angular Correlation Function (TPACF) is a mathematical equation that has applications in many areas. In our project, the Two Point Angular Correlation Function is used as a way to measure the probability of finding an astronomical body at a given angular distance from another astronomical body. We were given working sequential code as a starting point. The sequential code took in ...
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We constructed a sample of 185 Flat Spectrum Radio Quasars (FSRQs) by crosscorrelating the Shen et al.’s SDSS DR3 X-ray quasar sample with FIRST and GB6 radio catalogues. From the spectrum energy distribution (SED) constructed using multi-band (radio, UV, optical, Infrared and X-ray) data, we derived the synchrotron peak frequency and peak luminosity. The black hole mass MBH and the broad line ...
متن کاملThe Two-Point Angular Correlation Function and BATSE Sky Exposure
The Two-Point Angular Correlation Function is a standard analysis tool used to study angular anisotropies. Since BATSE’s sky exposure (the angular sampling of gamma-ray bursts) is anisotropic, the TPACF should at some point identify anisotropies in BATSE burst catalogs due to sky exposure. The effects of BATSE sky exposure are thus explored here for BATSE 3B and 4B catalogs. Sky-exposure effect...
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ژورنال
عنوان ژورنال: Journal of Physical Studies
سال: 2007
ISSN: 1027-4642,2310-0052
DOI: 10.30970/jps.11.350