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155 papers · 1 filter
Analysis of non-Gaussian CMB maps based on the N-pdf. Application to WMAP data
P. Vielva, J. L. Sanz
We present a new method based on the N-point probability distribution (pdf) to study non-Gaussianity in cosmic microwave background (CMB) maps. Likelihood and Bayesian estimation a…
Structure function of the UV variability of Q0957+561
L. J. Goicoechea, V. N. Shalyapin, R. Gil-Merino +1
We present a detailed structure function analysis of the UV variability of Q0957+561. From new optical observations, we constructed normalized structure functions of the quasar lum…
New two-colour light curves of Q0957+561: time delays and the origin of intrinsic variations
V. N. Shalyapin, L. J. Goicoechea, E. Koptelova +2
We extend the gr-band time coverage of the gravitationally lensed double quasar Q0957+561. New gr light curves permit us to detect significant intrinsic fluctuations, to determine…
The Quijote CMB Experiment
J. A. Rubino-Martin, R. Rebolo, M. Tucci +37
We present the current status of the QUIJOTE (Q-U-I JOint TEnerife) CMB Experiment, a new instrument which will start operations early 2009 at Teide Observatory, with the aim of ch…
A linear filter to reconstruct the ISW effect from CMB and LSS observations
R. B. Barreiro, P. Vielva, C. Hernandez-Monteagudo +1
The extraction of a signal from some observational data sets that contain different contaminant emissions, often at a greater level than the signal itself, is a common problem in A…
Use of neural networks for the identification of new z>=3.6 QSOs from FIRST-SDSS DR5
R. Carballo, J. I. Gonzalez-Serrano, C. R. Benn +1
We aim to obtain a complete sample of redshift > 3.6 radio QSOs from FIRST sources having star-like counterparts in the SDSS DR5 photometric survey (r<=20.2). We found that simple…