GLOSTAR — Radio Source Catalog II: 28◦ < l < 36◦ and |b| < 1◦,VLA B-configuration

As part of the Global View on Star Formation (GLOSTAR) survey we have used the Karl G. Jansky Very Large Array (VLA) in its B-configuration to observe the part of the Galactic plane between longitudes of 28◦ and 36◦ and latitudes from −1◦ to +1◦ at the C-band (4–8 GHz). To reduce the contamination of extended sources that are not well recovered by our coverage of the (u, v)-plane we discarded short baselines that are sensitive to emission on angular scales < 4′′. The resulting radio continuum images have an angular resolution of 1.′′0, and a sensitivity of ∼ 60 μJy beam−1; making it the most sensitive radio survey covering a large area of the Galactic plane with this angular resolution. An automatic source extraction algorithm was used in combination with visual inspection to identify a total of 3325 radio sources. A total of 1457 radio sources are ≥ 7σ and comprise our highly reliable catalog; 72 of these are grouped as 22 fragmented sources, e.g., multiple components of an extended and resolved source. To explore the nature of the catalogued radio sources we searched for counterparts at millimeter and infrared wavelengths. Our classification attempts resulted in 93 H ii region candidates, 104 radio stars, 64 planetary nebulae, while most of the remaining radio sources are suggested to be extragalactic sources. We investigated the spectral indices (α, S ν ∝ να) of radio sources classified as H ii region candidates and found that many have negative values. This may imply that these radio sources represent young stellar objects that are members of the star clusters around the high mass stars that excite the H ii regions, but not these H ii regions themselves. By comparing the peak flux densities from the GLOSTAR and CORNISH surveys we have identified 49 variable radio sources, most of them with an unknown nature. Additionally, we provide the list of 1866 radio sources detected within 5 to 7σ levels

Aspects epidemiologiques du lymphome de Burkitt de l’enfant Centrafricain : Epidemiological aspects of the Burkitt lymphoma of the Central African child

Objectif : Déterminer les aspects histo-épidémiologiques et cliniques du LB de l’enfant Centrafricain.Patients et méthodes : Il s’agissait d’une étude transversale multicentrique avec un mode de regroupement prospectif et rétrospectif réalisée au Centre Hospitalo-Universitaire Pédiatrique de Bangui (CHUPB), dans le service d’Oto-rhino-laryngologie (ORL), et de Stomatologie, et au Laboratoire National de Biologie Clinique et de Santé Publique (LNBCSP) du 1er janvier 2000 au 30 juin 2016. Ont été inclus dans cette étude, les enfants de 0 à 15 ans admis pour suspicion de LB confirmé histologiquement. Un questionnaire a permis de collecter les données qui ont été saisies et analysées à l’aide du logiciel Epi Info 7.Résultats: Durant la période d’étude nous avons collecté 34 cas de LB ce qui représente 28,66% de tous les cancers de l’enfant diagnostiqués pendant la période et 31,49% des lymphomes malins. Le sex-ratio était de 2,03 en faveur des garçons. Les enfants les plus touchés étaient âgés de 5 à 9 ans (50,0%), avec un âge moyen de 6,50 ans. Les patients provenaient de Bangui dans 67,65% de cas et avaient un niveau d’étude primaire dans 64,70%. Les patients étaient immunodéprimé connu à HIV dans 17,64% de cas. Ils étaient suivis au CHUPB et dans le service de Stomatologie respectivement dans 55,88% et 38,24%. La durée moyenne de consultation après apparition des premiers signes était de 6 mois. L’altération de l’état général était retrouvée dans 82,35% de cas. La tumeur était douloureuse dans 52,94% de cas, les deux principales localisations étaient maxillo-faciale (52,94%) et abdominale (17,64%). La tumeur était régulière 64,7% de cas, fixe dans 76,5% et bourgeonnante dans 82,4% de cas.Conclusion: Le lymphome de Burkitt reste préoccupant et mérite d’être connu en vue d’un dépistage précoce, d’autant que les traitements actuels ont permis d’allonger le taux de survie à plus de 90%. D’où l’importance de mener un fort plaidoyer en vue de soutenir des actions de sensibilisation sur les cancers de l’enfant. Objective: To determine the histoepidemiological and clinical aspects of LB in Central African children.Patients and methods: It was a multi-center cross-sectional study with a prospective and retrospective grouping method carried out at the Center Hospitalo-Universitaire Pédiatrique de Bangui (CHUPB), in the department of Otolaryngology (ENT), and Stomatology, and at the National Laboratory of Clinical Biology and Public Health (LNBCSP) from January 1, 2000 to June 30, 2016. Children 0 to 15 years of age admitted for suspected histologically confirmed LB were included in this study. A questionnaire collected the data that was entered and analyzed using the Epi Info 7 software.Results: During the study period we collected 34 cases of LB which represents 28.66% of all childhood cancers diagnosed during the period and 31.49% of malignant lymphomas. The sex ratio was 2.03 in favor of boys. The most affected children were 5 to 9 years old (50.0%), with an average age of 6.50 years. Patients were from Bangui in 67.65% of cases and had a primary education level in 64.70%. The patients were known to be immunocompromised to HIV in 17.64% of cases. They were followed at the CHUPB and in the Stomatology department respectively in 55.88% and 38.24%. The average duration of consultation after appearance of the first signs was 6 months. The deterioration of the general state was found in 82.35% of cases. The tumor was painful in 52.94% of cases, the two main locations were maxillofacial (52.94%) and abdominal (17.64%). The tumor was regular 64.7% of cases, fixed in 76.5% and budding in 82.4% of cases.Conclusion: Burkitt's lymphoma remains a concern and deserves to be known for early detection, especially since current treatments have helped increase survival rates to over 90%. Hence the importance of carrying out strong advocacy in order to support awareness-raising actions on childhood cancers

GLOSTAR -- Radio Source Catalog II: 28∘<ℓ<36∘28^\circ < \ell < 36^\circ and ∣b∣<1∘|b| < 1^\circ, VLA B-configuration

25 pages, 15 figures, and 6 tables, Accepted for publication in the Astronomy \& AstrophysicsAs part of the GLOSTAR survey we have used the VLA in its B-configuration to observe the part of the Galactic plane between longitudes of 28d and 36d and latitudes from -1d to +1d at the C-band (4--8 GHz). To reduce the contamination of extended sources that are not well recovered by our coverage of the (u, v)-plane we discarded short baselines that are sensitive to emission on angular scales $<4''$. The resulting radio continuum images have an angular resolution of 1.0'', and sensitivity of $\sim60 \mu$Jy~beam$^{-1}$; making it the most sensitive radio survey covering a large area of the Galactic plane with this angular resolution. An automatic source extraction algorithm was used in combination with visual inspection to identify a total of 3325 radio sources. A total of 1457 radio sources are $\geq7\sigma$ and comprise our highly reliable catalog; 72 of these are grouped as 22 fragmented sources, e.g., multiple components of an extended and resolved source. To explore the nature of the catalogued radio sources we searched for counterparts at millimeter and infrared wavelengths. Our classification attempts resulted in 93 HII region candidates, 104 radio stars, 64 planetary nebulae, while most of the remaining radio sources are suggested to be extragalactic sources. We investigated the spectral indices ($\alpha$, $S_\nu\propto\nu^\alpha$) of radio sources classified as HII region candidates and found that many have negative values. This may imply that these radio sources represent young stellar objects that are members of the star clusters around the high mass stars that excite the HII regions, but not these HII regions themselves. By comparing the peak flux densities from the GLOSTAR and CORNISH surveys we have identified 49 variable radio sources, most of them with an unknown nature. Additionally, we provide the list of 1866 radio sources detected within 5 to 7$\sigma$ levels

GLOSTAR -- Radio Source Catalog II: 28∘<ℓ<36∘28^\circ < \ell < 36^\circ and ∣b∣<1∘|b| < 1^\circ, VLA B-configuration

As part of the GLOSTAR survey we have used the VLA in its B-configuration to observe the part of the Galactic plane between longitudes of 28d and 36d and latitudes from -1d to +1d at the C-band (4--8 GHz). To reduce the contamination of extended sources that are not well recovered by our coverage of the (u, v)-plane we discarded short baselines that are sensitive to emission on angular scales $<4''$. The resulting radio continuum images have an angular resolution of 1.0'', and sensitivity of $\sim60 \mu$Jy~beam$^{-1}$; making it the most sensitive radio survey covering a large area of the Galactic plane with this angular resolution. An automatic source extraction algorithm was used in combination with visual inspection to identify a total of 3325 radio sources. A total of 1457 radio sources are $\geq7\sigma$ and comprise our highly reliable catalog; 72 of these are grouped as 22 fragmented sources, e.g., multiple components of an extended and resolved source. To explore the nature of the catalogued radio sources we searched for counterparts at millimeter and infrared wavelengths. Our classification attempts resulted in 93 HII region candidates, 104 radio stars, 64 planetary nebulae, while most of the remaining radio sources are suggested to be extragalactic sources. We investigated the spectral indices ($\alpha$, $S_\nu\propto\nu^\alpha$) of radio sources classified as HII region candidates and found that many have negative values. This may imply that these radio sources represent young stellar objects that are members of the star clusters around the high mass stars that excite the HII regions, but not these HII regions themselves. By comparing the peak flux densities from the GLOSTAR and CORNISH surveys we have identified 49 variable radio sources, most of them with an unknown nature. Additionally, we provide the list of 1866 radio sources detected within 5 to 7$\sigma$ levels