This work aims to analyse within a rigorous framework, veiling, visual extinction and excess extraction from the spectra of T Tauri stars. We investigate further the method of Hartigan et al. (1989) for veiling estimate from small spectral bandwidth of a few tens of Angstroms. The calculated veiling value is sensitive to the estimated noise ratio and to spectral mismatches between the object an...

We consider current observational constraints on the presence of cool, optically thick disk material in quiescent black hole binaries, specifically focusing on a case study of the prototypical system A0620– 00. Such material might be expected to be present theoretically, but is usually claimed to make a negligible contribution at optical and infrared wavelengths. The primary argument is based o...

In a high dispersion 1 μm survey of 39 classical T Tauri stars veiling is detected in 80%, and He I λ10830 and Pγ line emission in 97% of the stars. On average, the 1 μm veiling exceeds the level expected from previously identified sources of excess emission, suggesting the presence of an additional contributor to accretion luminosity in the star-disk interface region. Strengths of both lines c...

Current dehazing approaches are often hindered when scenes contain bright objects which can cause veiling light and transmission estimation methods to fail. This paper introduces a single image dehazing approach for underwater images with novel veiling light and transmission estimation steps which deal with issues arising from bright objects. We use features to hierarchically rank regions of an...

In a high-dispersion 1 m survey of 39 classical T Tauri stars (CTTSs) veiling is detected in 80% of the stars, and He i k10830 and P line emission in 97%. On average, the 1 m veiling exceeds the level expected from previously identified sources of excess emission, suggesting the presence of an additional contributor to accretion luminosity in the star-disk interface region. Strengths of both li...

The paper deals with the new veiling phenomenon that initially began two decades ago in countries like Egypt and was taken up in increasing numbers by young educated and working women. The new veiling, however, is no longer restricted to the Middle East. This form of dress is now being adopted by many young Moslem women of various national backgrounds all over the world. The new veiling is an i...

In High-Dynamic-Range (HDR) imaging, optical veiling glare sets the limits of accurate scene information recorded by a camera. But, what happens at the beach? Here we have a Low-Dynamic-Range (LDR) scene with maximal glare. Can we calibrate a camera at the beach and not be burnt? We know that we need sunscreen and sunglasses, but what about our cameras? The effect of veiling glare is scene-depe...

We present 110 simultaneous BV I photometric measurements and low resolution (≈ 400) spectra obtained during 17 consecutive days on the Classical T Tauri star DF Tau. Applying a new method for veiling extraction from low resolution spectra, we derive veiling curves in the B and V photometric bands which closely resemble their corresponding light curves. Analysis of the combined light and veilin...