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Related papers: An improved method of constructing binned luminosi…

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The classical 1/Va and PC methods of constructing binned luminosity functions (LFs) are revisited and compared by graphical analysis. Using both theoretical analysis and illustration with an example, we show why the two methods give…

Instrumentation and Methods for Astrophysics · Physics 2015-06-15 Zunli Yuan , Jiancheng Wang

We show that using either the method of Page & Carrera or the well-known $1/V_a$ method to construct the binned luminosity function (LF) of a flux limited sample of Active Galactic Nuclei (AGN) can produce an artificial flattening (or…

Astrophysics · Physics 2009-11-13 Mihai Cara , Matthew L. Lister

[ABRIDGED] I perform a detailed comparison of the shape of the optical luminosity functions as a function of galaxy class and filter, which have been obtained from redshift surveys with an effective depth ranging from z~0.01 to z~0.6. This…

Astrophysics · Physics 2009-11-10 Valerie de Lapparent

Only the 1/V_max method has been employed so far for observationally determining the white dwarf luminosity function, whereas for other kind of luminosity functions several other methods have been frequently used. Moreover, the procedures…

Astrophysics · Physics 2009-06-23 S. Torres , E. Garcia-Berro , J. Isern

We present the J-band luminosity function of 1838 mid-infrared and X-ray selected AGNs in the redshift range 0<z<5.85. These luminosity functions are constructed by combining the deep multi-wavelength broad-band observations from the UV to…

This is the first paper of a series aiming at investigating galaxy formation and evolution in the giant-void class of the Lemaitre-Tolman-Bondi (LTB) models that best fits current cosmological observations. Here we investigate the…

Cosmology and Nongalactic Astrophysics · Physics 2013-10-18 A. Iribarrem , P. Andreani , C. Gruppioni , S. February , M. B. Ribeiro , S. Berta , E. Le Floc'h , B. Magnelli , R. Nordon , P. Popesso , F. Pozzi , L. Riguccini

The observational limitations of astronomical surveys lead to significant statistical inference challenges. One such challenge is the estimation of luminosity functions given redshift $z$ and absolute magnitude $M$ measurements from an…

Astrophysics · Physics 2011-02-11 Chad M. Schafer

The properties of the progenitors of gamma-ray bursts (GRBs) and of their environment are encoded in their luminosity function and cosmic formation rate. They are usually recovered from a flux-limited sample based on Lynden-Bell's $c^{-}$…

Astrophysics of Galaxies · Physics 2024-03-18 Rui-Jing Lu , Wen-Hao Chen , Wen-Qiang Liang , Cheng-Feng Peng

In this work, we restudy the dependence of luminosity function and event rates for different gamma-ray burst samples on the criteria of sample selection and threshold effect. To compare with many previous studies, we have chosen two samples…

High Energy Astrophysical Phenomena · Physics 2022-04-20 X. F. Dong , X. J. Li , Z. B. Zhang , X. L. Zhang

We estimate the luminosity evolution and formation rate for over 900 GRBs by using redshift and luminosity data calculated by Band, Norris, $&$ Bonnell (2004) via the lag-luminosity correlation. By applying maximum likelihood techniques, we…

Astrophysics · Physics 2009-11-11 Daniel Kocevski , Edison Liang

We measure the luminosity function of QSOs in the redshift range 3.5 < z < 5.2 for the absolute magnitude interval -21 < M_{145} < -28. Suitable criteria are defined to select faint QSOs in the GOODS fields, checking their effectiveness and…

We present a new efficient technique for measuring evolution of the galaxy luminosity function. The method reconstructs the evolution over the luminosity-redshift plane using any combination of three input dataset types: 1) number counts,…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 Simon Dye , Steve Eales

Aims: In this work the luminosity function of QSOs is measured in the redshift range 3.5<z<5.2 for the absolute magnitude interval -21<M_{145}<-28. The determination of the faint end of the luminosity function at these redshifts provides…

Astrophysics · Physics 2009-11-11 F. Fontanot , S. Cristiani , P. Monaco , M. Nonino , E. Vanzella , W. N. Brandt , A. Grazian , J. Mao

A new method is presented to obtain a non-parametric maximum likelihood estimate of the luminosity function and the selection function of a flux limited redshift survey. The method parameterizes the selection function as a series of…

Astrophysics · Physics 2009-10-30 Volker Springel , Simon D. M. White

We review five studies of the gamma-ray burst (GRB) luminosity function that are based on one or more of the proposed luminosity criteria, i.e., variability, spectral lag and spectral hardness. A comparison between the resulting luminosity…

Astrophysics · Physics 2007-05-23 Maarten Schmidt

Both the detection of galaxies and the derivation of the luminosity function depend upon isophotal magnitudes, implicitly in the first case, and explicitly in the latter. However, unlike perfect point sources, the fraction of a galaxy's…

Astrophysics · Physics 2009-10-30 Julianne J. Dalcanton

AIMS: We have compiled one of the largest normal-galaxy samples ever to probe X-ray luminosity function evolution separately for early and late-type systems. METHODS: We selected 207 normal galaxies up to redshift z~1.4, with data from four…

Astrophysics · Physics 2009-11-13 P. Tzanavaris , I. Georgantopoulos

We derive, adopting a direct method, the luminosity function and the formation rate of long Gamma Ray Bursts through a complete, flux-limited, sample of Swift bursts which has a high level of completeness in redshift z (~82%). We…

High Energy Astrophysical Phenomena · Physics 2016-02-17 A. Pescalli , G. Ghirlanda , R. Salvaterra , G. Ghisellini , S. D. Vergani , F. Nappo , O. S. Salafia , A. Melandri , S. Covino , D. Götz

In a previous paper (Gavignaud et al. 2006), we presented the type-1 Active Galactic Nuclei (AGN) sample obtained from the first epoch data of the VIMOS-VLT Deep Survey (VVDS). The sample consists of 130 faint, broad-line AGN with redshift…

We determine the evolution of the galaxy luminosity function (LF) as a function of spectral type using the Autofib redshift survey, a compendium of over 1700 galaxy redshifts in various magnitude-limited samples spanning b_J=11.5-24.0. To…

Astrophysics · Physics 2015-06-24 Jeremy Heyl , Matthew Colless , Richard S. Ellis , Tom Broadhurst
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