Reverberation Mapping of High-z, High-luminosity Quasars

We present Reverberation Mapping results after monitoring a sample of 17 high-z, high-luminosity quasars for more than 10 years using photometric and spectroscopic capabilities. Continuum and line emission flux variability is observed in all quasars. Using cross-correlation analysis we successfully determine lags between the variations in the continuum and broad emission lines for several sources. Here we present a highlight of our results and the determined radius--luminosity relations for Ly_alpha and CIV.Comment: Contributed talk at conference "Quasars at all cosmic epochs", held in Padova 2-7 April 2017, published in Frontiers in Astronomy and Space Science

Obscured quasars at high redshift in the UKIDSS Ultra Deep Survey

Obscured quasars hidden in deep X-ray surveys can be recovered by looking at mid-infrared wavelengths, where dust re-radiates the absorbed radiation. Here we present a sample of obscured quasars in the redshift range 1 < z < 4 based on data from the UKIDSS Ultra-Deep Survey (UDS), the deepest near-IR survey over ~ 1 sq. deg. to date. Candidates that are primarily selected by their 24 μm emission are probed by decomposing their spectral energy distribution (SED) to disentangle the emission from the AGN and its host galaxy. We show preliminary results on their host galaxy properties as well as their clustering, showing that obscured quasars are found in galaxies located in the green valley, residing in dark matter haloes not different from normal galaxies at those redshift

T-cell/Histiocyte-rich Large B-cell Lmphoma in Pediatric Patients: a Reported Case of a 16-year-old Patient in Clinical Haematology Department of the University Teaching Hospital of Yopougon (Abidjan-Ivory Coast)

T-cell/Histiocyte-rich large B-cell lymphoma (THRLBCL) is a rare pathology, uncommon in children population and the few cases reported, had wide range clinical presentations, including advanced stage, extranodal involvement and bad prognosis. Authors report a case of a 16-year-old male patient with no medical history, who presented a single left axillary adenopathy. T-cell/Histiocyte-rich large B-cell lymphoma was diagnosed by immunohistochemistry and was classified good prognosis. A RCHOP-based chemotherapy was performed with good progress. Authors hope to contribute to the literature on THRLBCL and draw the attention of practitioners to its occurrence in the pediatric population

T-cell/Histiocyte-rich Large B-cell Lmphoma in Pediatric Patients: a Reported Case of a 16-year-old Patient in Clinical Haematology Department of the University Teaching Hospital of Yopougon (Abidjan-Ivory Coast)

T-cell/Histiocyte-rich large B-cell lymphoma (THRLBCL) is a rare pathology, uncommon in children population and the few cases reported, had wide range clinical presentations, including advanced stage, extranodal involvement and bad prognosis. Authors report a case of a 16-year-old male patient with no medical history, who presented a single left axillary adenopathy. T-cell/Histiocyte-rich large B-cell lymphoma was diagnosed by immunohistochemistry and was classified good prognosis. A RCHOP-based chemotherapy was performed with good progress. Authors hope to contribute to the literature on THRLBCL and draw the attention of practitioners to its occurrence in the pediatric population

T-cell/Histiocyte-rich Large B-cell Lymphoma in an Adolescent from Abidjan-Ivory Coast: Case Report

T-cell/Histiocyte-rich large B-cell lymphoma (THRLBCL) is a rare pathology, uncommon in the children population, and the few cases reported had a wide range of clinical presentations, including advanced stage, extranodal involvement, and bad prognosis. The authors report a case of a 16-year-old male patient with no medical history, who presented a single left axillary adenopathy. T-cell/Histiocyte-rich large B-cell lymphoma was diagnosed by immunohistochemistry and was classified good prognosis. RCHOP-based chemotherapy was performed with good progress. The authors hope to contribute to the literature on THRLBCL and draw the attention of practitioners to its occurrence in the pediatric population

Evolutionary profile of patients with hemoglobin SC disease regularly followed in Côte d'Ivoire

Background: West Africa is recognized as the elective focus of hemoglobin C. The S and C combination in the same patient gives a major sickle cell syndrome. In our country, very few series dealing with the evolutionary features of this SC form have been published contrary to the homozygous SS form. The aim of this study was to describe the evolutionary profile of double heterozygous SC sickle cell patients.Methods: This was a retrospective and prospective study with descriptive and analytical purpose of 174 SC sickle cell patients.Results: The median age was 26 years with extremes of 6 years and 57 years. 96% of patients had less than 4 vaso-occlusive seizures per year. The evolutionary complications were mainly ischemic (56.30%) and infectious (39.10%). Among ischemic complications, sickle cell retinopathies and aseptic osteonecrosis are the most common with 59.20% and 31.63% respectively. Infectious complications were dominated by ENT (36.76%) and osteoarticular (35.29%) infections. Only age had an influence on the occurrence of ischemic complications (p = 0.0001). The probability of survival at 5 years was 99.38% and that at 20 years was 91.57%. The overall survival was not influenced by evolutionary complications.Conclusions: Infectious and ischemic evolutionary complications show the importance of vaccination and an early screening program

Reverberation Mapping of the most luminous Quasars at z~2-3.

<p>Reverberation Mapping (RM) provides the only tool to determine Black Holes (BH) masses directly, but so far this method has been applied only to small and intermediate luminosity systems (L<10^46 ergs/s). We are extending these studies by two orders of magnitude, probing the BH-mass of luminous AGN at redshift 2-3, obtaining the measurement of the largest BHs and extending our knowledge of the physics of AGN and their hosts into the most crucial epoch in galaxy evolution. Since 2005 we have been monitoring very luminous Quasars using broad-band imaging with<br> the SMARTS telescopes and in 2007 we started the RM campaign of our most variable targets obtaining spectroscopic follow-up with the du Pont telescope. After 10 years of data gathering we are finally able to report on the RM for Quasar J221516 as well as several other systems that should yield results in the near future.</p