Add to ORKGThe spectral indexes distribution of a quasar sample is derived from a far-UV survey. A red average spectrum is found which comes in support of significant evolution of the QSO spectral energy distribution (SED) since $z\approx2.5$
We demonstrate that the UV brightest quasars at z = 1–2 live in overdense environments. This is base...
<p>Quasars are well known to exhibit a non-linear relationship between the UV emission from their ac...
Combining radio observations with optical and infrared color selection--demonstrated in our pilot st...
We present an analysis of the broadband UV/optical properties of z<3.4 quasars matched in the Galaxy...
Measurements at 1.2, 1.6 and 2.2 microns were combined with visual spectrophotometry of 21 quasars h...
Measurements at 1.2, 1.6, and 2.2 μm have been combined with visual spectrophotometry of 21 quasars ...
Although quasar spectra appear remarkably similar, subtle systematic differences are well- known and...
Using Chandra and HST archival data, we have studied the individual Spectral Energy Distribution (SE...
The rest-frame far to extreme ultraviolet (UV) colour–redshift relationship has been constructed fro...
We present an atlas of the spectral energy distributions (SEDs) of normal, nonblazar, quasars over t...
Aims. The distribution of neutral hydrogen in the intergalactic medium (IGM) is currently explored a...
We demonstrate that the UV brightest quasars at z = 1–2 live in overdense environments. This is base...
The Sloan Digital Sky Survey has obtained images in five broad-band colors for several hundred squar...
For 15 bright (V3) quasars, we have obtained IR spectra and photometry, and optical spectrophotometr...
This is an open access article under the terms of the Creative Commons Attribution License, which pe...
We demonstrate that the UV brightest quasars at z = 1–2 live in overdense environments. This is base...
<p>Quasars are well known to exhibit a non-linear relationship between the UV emission from their ac...
Combining radio observations with optical and infrared color selection--demonstrated in our pilot st...
We present an analysis of the broadband UV/optical properties of z<3.4 quasars matched in the Galaxy...
Measurements at 1.2, 1.6 and 2.2 microns were combined with visual spectrophotometry of 21 quasars h...
Measurements at 1.2, 1.6, and 2.2 μm have been combined with visual spectrophotometry of 21 quasars ...
Although quasar spectra appear remarkably similar, subtle systematic differences are well- known and...
Using Chandra and HST archival data, we have studied the individual Spectral Energy Distribution (SE...
The rest-frame far to extreme ultraviolet (UV) colour–redshift relationship has been constructed fro...
We present an atlas of the spectral energy distributions (SEDs) of normal, nonblazar, quasars over t...
Aims. The distribution of neutral hydrogen in the intergalactic medium (IGM) is currently explored a...
We demonstrate that the UV brightest quasars at z = 1–2 live in overdense environments. This is base...
The Sloan Digital Sky Survey has obtained images in five broad-band colors for several hundred squar...
For 15 bright (V3) quasars, we have obtained IR spectra and photometry, and optical spectrophotometr...
This is an open access article under the terms of the Creative Commons Attribution License, which pe...
We demonstrate that the UV brightest quasars at z = 1–2 live in overdense environments. This is base...
<p>Quasars are well known to exhibit a non-linear relationship between the UV emission from their ac...
Combining radio observations with optical and infrared color selection--demonstrated in our pilot st...